WO2024171701A1 - Capacitor - Google Patents
Capacitor Download PDFInfo
- Publication number
- WO2024171701A1 WO2024171701A1 PCT/JP2024/001145 JP2024001145W WO2024171701A1 WO 2024171701 A1 WO2024171701 A1 WO 2024171701A1 JP 2024001145 W JP2024001145 W JP 2024001145W WO 2024171701 A1 WO2024171701 A1 WO 2024171701A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- connection terminal
- terminal portion
- capacitor
- bus bar
- external connection
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 282
- 239000011347 resin Substances 0.000 claims abstract description 43
- 229920005989 resin Polymers 0.000 claims abstract description 43
- 230000002093 peripheral effect Effects 0.000 claims abstract description 28
- 239000000945 filler Substances 0.000 abstract 4
- 239000010408 film Substances 0.000 description 34
- 239000011104 metalized film Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000005476 soldering Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- -1 zinc or magnesium Chemical compound 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/02—Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/10—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
Definitions
- the present invention relates to capacitors such as film capacitors.
- a case-molded capacitor that includes a number of capacitor elements each having a pair of end faces and a peripheral surface, with electrodes formed on each end face, a case that houses these capacitor elements, and a filling resin that fills the case.
- the multiple capacitor elements can take on various positions and arrangements within the case.
- multiple capacitor elements may be arranged in a matrix within the case such that the peripheral surfaces of two adjacent capacitor elements face each other in a first direction parallel to the inner bottom surface of the case, and the electrodes of two adjacent capacitor elements face each other in a second direction parallel to the inner bottom surface of the case and perpendicular to the first direction.
- An example of such a capacitor is described in Patent Document 1.
- the electrode connection portions of the first relay busbar and the second relay busbar are soldered to the first end surface electrodes and second end surface electrodes of a plurality of capacitor elements aligned in the second direction to form a capacitor element unit.
- the plurality of capacitor element units are aligned so that the end surface electrodes of the capacitor elements face each other, and the connection terminal portions of the first relay busbar and the second relay busbar of each capacitor element unit are connected to the internal connection terminal portions of the first external connection busbar and the second external connection busbar to complete the capacitor assembly.
- a filling resin is filled into the case that houses the capacitor assembly.
- the external connection terminal portions of the first external connection busbar and the second external connection busbar are exposed from the filling resin and can be connected to external terminals.
- the first relay bus bar and the second relay bus bar can be soldered to the first end surface electrode and the second end surface electrode before the multiple capacitor element units are arranged, so there is no need to provide a gap between the two opposing end surface electrodes that would be required for soldering. This makes it possible to reduce the gap between the two end surface electrodes, allowing the capacitors to be compactly arranged in the direction in which the capacitor element units are arranged.
- each capacitor element unit is provided with an overlapping portion where the first relay bus bar and the second relay bus bar overlap on the peripheral surface of the capacitor element. This makes it possible to reduce the ESL (equivalent series inductance).
- the capacitor according to the main aspect of the present invention comprises a plurality of capacitor element units, a case in which the plurality of capacitor element units are housed, a filling resin filled in the case, a first external connection bus bar, and a second external connection bus bar.
- Each of the multiple capacitor element units includes multiple capacitor elements, a first relay bus bar, and a second relay bus bar.
- the multiple capacitor elements are arranged in the case along a first direction parallel to the inner bottom surface of the case.
- Each of the multiple capacitor elements has two end faces and a circumferential surface on which electrodes are respectively formed.
- the first relay bus bar is connected to the electrode on one of the two end faces of each of the multiple capacitor elements
- the second relay bus bar is connected to the electrode on the other of the two end faces of each of the multiple capacitor elements.
- the plurality of capacitor element units are arranged in the case along a second direction that is parallel to the inner bottom surface of the case and perpendicular to the first direction.
- the electrode of each of the plurality of capacitor elements in one of two adjacent capacitor element units of the plurality of capacitor element units faces the electrode of a corresponding capacitor element of the plurality of capacitor elements in the other of the two adjacent capacitor element units.
- the first external connection bus bar has a first external connection terminal portion exposed from the filling resin and configured to be connected to an external terminal, a first overlap portion, and is connected to the first relay bus bar of each of the plurality of capacitor element units inside the filling resin.
- the second external connection bus bar has a second external connection terminal portion exposed from the filling resin and configured to be connected to an external terminal, a second overlap portion, and is connected to the second relay bus bar of each of the plurality of capacitor element units inside the filling resin.
- the first overlapping portion and the second overlapping portion overlap each other when viewed from a third direction perpendicular to the inner bottom surface of the case within the case so as to cover the peripheral surfaces of each of the capacitor elements arranged in the second direction within the capacitor element units, and the gaps that occur between two adjacent capacitor elements in the second direction among the capacitor elements arranged in the second direction.
- the present invention provides a capacitor that can be made compact and is expected to have an improved ESL reduction effect when multiple capacitor elements are arranged in a matrix inside a case such that the electrodes of two adjacent capacitor elements face each other in one of the vertical and horizontal arrangement directions.
- FIG. 1A is a perspective view of a film capacitor according to an embodiment.
- FIG. 1B is a perspective view of the film capacitor before a filling resin is filled into a case according to the embodiment.
- FIG. 2A is a perspective view of a capacitor element unit according to an embodiment.
- FIG. 2B is a perspective view of the capacitor element unit according to the embodiment.
- FIG. 3 is a perspective view of a pair of relay bus bars with nuts separated from each other according to the embodiment.
- FIG. 4 is an exploded perspective view of the busbar unit according to the embodiment.
- FIG. 5A is a perspective view of a first external connection bus bar according to an embodiment.
- FIG. 5B is a perspective view of a second external connection bus bar according to an embodiment.
- FIG. 6A is a perspective view of a first insulating sheet according to an embodiment.
- FIG. 6B is a perspective view of a second insulating sheet according to the embodiment.
- FIG. 7A is a perspective view of a case according to an embodiment.
- FIG. 7B is a side cross-sectional view of the case cut at the placement platform according to an embodiment.
- FIG. 8A is a diagram for explaining assembly of a capacitor assembly according to an embodiment.
- FIG. 8B is a diagram for explaining assembly of the capacitor assembly according to the embodiment.
- FIG. 9A is a diagram for explaining assembly of a capacitor assembly according to an embodiment.
- FIG. 9B is a diagram for explaining assembly of the capacitor assembly according to the embodiment.
- FIG. 10A is a perspective view of a capacitor element unit according to a first modified example.
- FIG. 10B is a perspective view of a case according to the first modified example.
- the overlapping portions between the busbars to reduce ESL are provided only in the area above the peripheral surfaces of the multiple capacitor elements aligned in the first direction, and the overlapping portions do not exist in the area above the gap between the two capacitor elements.
- the present invention provides a capacitor that can be made compact and is expected to have an improved ESL reduction effect when multiple capacitor elements are arranged in a matrix inside a case so that the electrodes of two adjacent capacitor elements face each other in one of the vertical and horizontal arrangement directions.
- a film capacitor 1 which is one embodiment of a capacitor according to the present invention, will be described with reference to the drawings.
- the front-rear, left-right, and up-down directions are indicated in each drawing as appropriate. Note that the directions shown in the drawings indicate only the relative directions of the film capacitor 1, and do not indicate absolute directions.
- FIG. 1A is a perspective view of the film capacitor 1
- FIG. 1B is a perspective view of the film capacitor 1 before the filling resin 30 is filled into the case 20.
- the film capacitor 1 comprises a capacitor assembly 10, a case 20 in which the capacitor assembly 10 is housed, and a filled resin 30 filled in the case 20.
- the capacitor assembly 10 includes a plurality of capacitor element units 40 (three in this embodiment) and a bus bar unit 50 to which these capacitor element units 40 are connected. Most of the capacitor assembly 10 buried in the filled resin 30 is protected from moisture and impact by the case 20 and the filled resin 30.
- FIGS. 2A and 2B are perspective views of the capacitor element unit 40.
- FIG. 3 is a perspective view of a pair of relay bus bars 200 with the nuts 60 separated.
- the capacitor element unit 40 includes a plurality of capacitor elements 100 (three in this embodiment) and a pair of relay bus bars 200.
- Capacitor element 100 is formed by stacking two metallized films, each of which has aluminum vapor-deposited on a dielectric film, rolling or laminating the stacked metallized films, and pressing them into a flat shape.
- Capacitor element 100 is formed in a shape close to an oval cylinder, and has a pair of end faces 101 and a peripheral surface 102.
- Peripheral surface 102 includes two flat surfaces 102a that are parallel to each other, and two curved surfaces 102b that connect these flat surfaces 102a.
- Capacitor element 100 has electrodes 110 formed on each of the pair of end faces 101 by spraying a metal such as zinc.
- the capacitor element 100 may be formed from a metallized film on which a metal other than aluminum, such as zinc or magnesium, is vapor-deposited.
- the capacitor element 100 may be formed from a metallized film on which multiple of these metals are vapor-deposited, or from a metallized film on which an alloy of these metals is vapor-deposited.
- the pair of relay busbars 200 are formed by appropriately cutting and bending a conductive material, for example, a copper plate, and have a plate shape of a predetermined shape.
- the pair of relay busbars 200 have shapes that are inverted from each other in the left-right direction.
- Each relay busbar 200 includes a main body 210 and a connection terminal 220.
- the main body 210 includes a first portion 211 having an elongated plate shape with its surface facing in the left-right direction, and a second portion 212 connected to the rear upper end of the first portion 211, having an elongated plate shape with its surface facing in the up-down direction.
- a pair of electrode pins 213, which are electrode connection portions, are formed on the main body 210 at the front of the first portion 211 and at the front and rear of the second portion 212 so as to protrude downward.
- connection terminal portion 220 is located at the upper end of the first portion 211, slightly forward from the second portion 212.
- the connection terminal portion 220 has a substantially rectangular plate shape, and its surface faces in the vertical direction.
- a nut 60 is fixed to the connection terminal portion 220.
- the nut 60 is a press-fit nut having a flat cylindrical shape with a step on one end face and a knurled circumferential surface of the stepped portion 61.
- a circular through hole 221 is formed in the connection terminal portion 220, and the stepped portion 61 of the nut 60 is press-fitted into the through hole 221 from below.
- the nut 60 protrudes downward from the underside of the connection terminal portion 220.
- the three capacitor elements 100 are arranged in the front-to-rear direction so that their peripheral surfaces 102 (curved surfaces 102b) face each other.
- the gap between the first capacitor element 100 and the second capacitor element 100 from the front is made larger than the gap between the second capacitor element 100 and the third capacitor element 100 from the front.
- the pair of relay busbars 200 are installed on the three capacitor elements 100 so that the second portion 212 of the main body 210 rests on the peripheral surface 102 (flat surface 102a) of the two rear capacitor elements 100.
- the pair of electrode pins 213 of each of the pair of relay busbars 200 contacts each of the pair of electrodes 110 of the three capacitor elements 100 and is connected by soldering. This electrically connects the pair of relay busbars 200 to the pair of electrodes 110 of the three capacitor elements 100.
- connection terminal portions 220 of the pair of relay busbars 200 are positioned between the first capacitor element 100 and the second capacitor element 100 from the front.
- Figure 4 is an exploded perspective view of the busbar unit 50.
- the busbar unit 50 includes a first external connection busbar 300, a second external connection busbar 400, a first insulating sheet 500, and a second insulating sheet 600.
- the first insulating sheet 500 is attached to the first external connection busbar 300 from below with an adhesive or the like.
- the second insulating sheet 600 is attached to the second external connection busbar 400 from below with an adhesive or the like.
- FIG. 5A is a perspective view of the first external connection bus bar 300
- FIG. 5B is a perspective view of the second external connection bus bar 400.
- the first external connection bus bar 300 and the second external connection bus bar 400 are formed by appropriately cutting and bending a conductive material, for example a copper plate, and have a plate shape of a predetermined shape.
- the first external connection busbar 300 includes a first main body portion 310, a first internal connection terminal portion 320, and a first external connection terminal portion 330.
- the first main body 310 has a generally rectangular plate shape bent into an L-shape, and includes a first portion 311 whose surface faces in the vertical direction, and a second portion 312 that rises from the front edge of the first portion 311 and whose surface faces in the front-to-rear direction.
- the first portion 311 forms the first overlapping portion 340.
- two first openings 313, which are generally square and aligned in the left-right direction, are formed in the first portion 311 (first overlapping portion 340).
- the first external connection terminal portion 330 has a long, narrow rectangular plate shape and extends horizontally rearward from the upper edge of the second portion 312 of the first main body portion 310.
- the second external connection busbar 400 includes a second main body portion 410, a second internal connection terminal portion 420, and a second external connection terminal portion 430.
- the second main body 410 has a generally rectangular plate shape bent into an L-shape, and includes a first portion 411 whose surface faces in the vertical direction, and a second portion 412 that rises from the front edge of the first portion 411 and whose surface faces in the front-to-rear direction.
- the first portion 411 forms the second overlapping portion 440.
- two second openings 413 which are generally square and aligned in the left-right direction, are formed in the first portion 411 (second overlapping portion 440).
- the second internal connection terminal 420 is provided at the rear of the first portion 411 of the second main body 410, and is composed of a second narrow terminal 421 that is narrow in the left-right direction and a second wide terminal 422 that is wide in the left-right direction.
- the second narrow terminal 421 extends rearward from the left end of the first portion 411, and the second wide terminal 422 extends rearward from a position slightly inside (left side) the right end of the first portion 411.
- the second narrow terminal 421 and the second wide terminal 422 have intermediate portions that slope downward so that the tip ends are one step lower than the base ends.
- one through hole 423 is formed at the tip of the second narrow terminal 421, and two through holes 423 are formed side by side in the left-right direction at the tip of the second wide terminal 422.
- the second external connection terminal portion 430 has a long, narrow rectangular plate shape and extends horizontally forward from the upper edge of the second portion 412 of the second main body portion 410.
- FIG. 6A is a perspective view of the first insulating sheet 500
- FIG. 6B is a perspective view of the second insulating sheet 600.
- the first insulating sheet 500 and the second insulating sheet 600 are insulators made of insulating paper or resin materials with insulating properties such as acrylic or silicone.
- the first insulating sheet 500 includes a first insulating portion 510 having a rectangular shape, a second insulating portion 520 having an elongated rectangular shape rising from the front edge of the first insulating portion 510, and a third insulating portion 530 extending rearward from the rear edge of the first insulating portion 510.
- the first insulating portion 510 has two third openings 511 that are substantially rectangular and aligned in the left-right direction. The diameter of the third openings 511 is smaller than the diameter of the first openings 313 of the first external connection busbar 300.
- the third insulating portion 530 is composed of a first narrow portion 531 that is rectangular and narrow in the left-right direction and is located at the right end of the first insulating portion 510, and a first wide portion 532 that is rectangular and wide in the left-right direction and is located slightly inside (right side) of the left end of the first insulating portion 510.
- the first insulating portion 510 is located below the first portion 311 (first overlapping portion 340) of the first main body portion 310
- the second insulating portion 520 is located in front of the second portion 312 of the first main body portion 310
- the first narrow portion 531 and first wide portion 532 of the third insulating portion 530 are located below the first narrow terminal portion 321 and first wide terminal portion 322 of the first internal connection terminal portion 320, respectively.
- the center position of the first opening 313 and the center position of the third opening 511 are aligned with each other.
- the second insulating sheet 600 includes a first insulating portion 610 having a rectangular shape, a second insulating portion 620 having an elongated rectangular shape that rises slightly from the front edge of the first insulating portion 610, and a third insulating portion 630 that extends rearward from the rear edge of the first insulating portion 610.
- the first insulating portion 610 has two fourth openings 611 that are substantially rectangular and aligned in the left-right direction. The diameter of the fourth openings 611 is smaller than the diameter of the second openings 413 of the second external connection bus bar 400.
- the third insulating portion 630 is composed of a second narrow portion 631 that is rectangular and narrow in the left-right direction and is located at the left end of the first insulating portion 610, and a second wide portion 632 that is rectangular and wide in the left-right direction and is located slightly inside (left side) of the right end of the first insulating portion 610.
- the first insulating portion 610 is located below the first portion 411 (second overlapping portion 440) of the second main body portion 410
- the second insulating portion 620 is located in front of the second portion 412 of the second main body portion 410
- the second narrow portion 631 and the second wide portion 632 of the third insulating portion 630 are located below the second narrow terminal portion 421 and the second wide terminal portion 422 of the second internal connection terminal portion 420, respectively.
- the center position of the second opening 413 and the center position of the fourth opening 611 are aligned.
- FIG. 7A is a perspective view of the case 20, and FIG. 7B is a side cross-sectional view of the case 20 cut at the position of the mounting table 23.
- the case 20 is made of a resin material such as polyphenylene sulfide, and is formed in the shape of a roughly rectangular parallelepiped box that is long in the front-to-rear direction and has an open top.
- a mounting portion 22 is provided on the inner bottom surface 21a of the case 20 so as to protrude from the inner bottom surface 21a.
- the mounting portion 22 is divided into six mounting tables 23 lined up in the left-right direction.
- a predetermined gap is provided between any two adjacent mounting tables 23.
- a predetermined gap is provided between the mounting tables 23 at both the left and right ends and the left and right inner surfaces 21b of the case 20.
- Each mounting base 23 has a substantially rectangular prism shape with a flat upper surface.
- a first hole portion 24 is formed in the upper surface (mounting surface) of each mounting base 23. That is, six first hole portions 24 are provided in the mounting portion 22.
- the first hole portions 24 have a flat cylindrical shape corresponding to the shape of the nut 60.
- the inner diameter of the first hole portion 24 is slightly larger than the outer diameter of the nut 60, and the depth of the first hole portion 24 is slightly larger than the amount of protrusion of the nut 60 from the underside of the relay busbar 200.
- a second hole 25 is formed in the center of the bottom surface of the first hole 24.
- the second hole 25 has a cylindrical shape corresponding to the shape of the threaded portion of the bolt 70 that is fastened to the nut 60.
- the inner diameter of the second hole 25 is slightly larger than the outer diameter of the threaded portion of the bolt 70, and the depth of the second hole 25 is sufficiently larger than the amount by which the threaded portion of the bolt 70 protrudes from the nut 60.
- the three capacitor element units 40 and the busbar unit 50 are connected inside the case 20 to form the capacitor assembly 10. At the same time, the capacitor assembly 10 is housed inside the case 20.
- Figures 8A, 8B, 9A, and 9B are diagrams for explaining the assembly of the capacitor assembly 10.
- three capacitor element units 40 are housed in the case 20.
- the three capacitor element units 40 are arranged in the left-right direction on the inner bottom surface 21a of the case 20 such that the electrodes 110 of the three capacitor elements 100 in two adjacent capacitor element units 40 face each other.
- the three capacitor elements 100 of each capacitor element unit 40 are arranged in the front-rear direction on the inner bottom surface 21a of the case 20.
- nine capacitor elements 100 are arranged in a matrix within the case 20, such that the peripheral surfaces 102 (curved surfaces 102b) of two adjacent capacitor elements 100 face each other in the front-to-back arrangement direction, and the electrodes 110 of two adjacent capacitor elements 100 face each other in the left-to-right arrangement direction.
- the front-to-back direction is a first direction parallel to the inner bottom surface 21a of the case 20
- the left-to-right direction is a second direction parallel to the inner bottom surface 21a of the case 20 and perpendicular to the first direction.
- the pair of relay bus bars 200 and the pair of electrodes 110 of the three capacitor elements 100 have already been connected by soldering. This means that there is no need to provide the spacing required for the soldering work, and the spacing between two adjacent capacitor element units 40 can be made smaller.
- the right electrodes 110 of the three capacitor elements 100 of the right-most and left-most capacitor element units 40 and the left electrodes 110 of the three capacitor elements 100 of the central capacitor element unit 40 are of the same polarity (for example, positive). Furthermore, the left electrodes 110 of the three capacitor elements 100 of the right-most and left-most capacitor element units 40 and the right electrodes 110 of the three capacitor elements 100 of the central capacitor element unit 40 are of the same polarity (for example, negative). Therefore, in the left-right direction, the electrodes 110 of the same polarity of two adjacent capacitor elements 100 face each other. This makes it unnecessary to secure an insulating distance between the facing electrodes 110, and the distance between two adjacent capacitor element units 40 can be further reduced.
- the right-side relay busbar 200 and the left-side relay busbar 200 are the first relay busbar 200A and the second relay busbar 200B, respectively, and the connection terminal portion 220 of the right-side relay busbar 200 and the connection terminal portion 220 of the left-side relay busbar 200 are the first connection terminal portion 220A and the second connection terminal portion 220B, respectively.
- the left-side relay busbar 200 and the right-side relay busbar 200 are the first relay busbar 200A and the second relay busbar 200B, respectively, and the connection terminal portion 220 of the left-side relay busbar 200 and the connection terminal portion 220 of the right-side relay busbar 200 are the first connection terminal portion 220A and the second connection terminal portion 220B, respectively.
- each mounting base 23 of the mounting portion 22 is located between the first capacitor element 100 and the second capacitor element 100 from the front of each capacitor element unit 40.
- the first connection terminal portion 220A of the first relay bus bar 200A and the second connection terminal portion 220B of the second relay bus bar 200B in each capacitor element unit 40 are placed on the corresponding mounting base 23.
- Nuts 60 fixed to these connection terminal portions 220A, 220B and protruding toward the inner bottom surface 21a of the case 20 fit into the first hole portion 24 of the mounting base 23.
- the second external connection bus bar 400 is housed in the case 20 with the second insulating sheet 600 attached.
- the second overlapping portion 440 (first portion 411) and the second internal connection terminal portion 420 of the second external connection bus bar 400 are placed on the peripheral surface 102 of the three front capacitor elements 100 lined up in the left-right direction, i.e., the front capacitor element 100 of the three capacitor element units 40.
- the tip portion of the second narrow terminal portion 421 of the second internal connection terminal portion 420 is placed on the second connection terminal portion 220B of the second relay bus bar 200B of the leftmost capacitor element unit 40 and placed on the mounting base 23.
- the tip of the second wide terminal portion 422 of the second internal connection terminal portion 420 is placed on top of the second connection terminal portion 220B of the second relay bus bar 200B of the central and right-end capacitor element units 40, and placed on the two mounting bases 23.
- the three through holes 423 of the second internal connection terminal portion 420 are aligned with the screw holes of the nuts 60 of the three second connection terminal portions 220B.
- a second insulating sheet 600 is interposed between the second external connection bus bar 400 and the peripheral surfaces 102 of the three capacitor elements 100. This ensures insulation between the second external connection bus bar 400 and the left electrode 110 of the right-most capacitor element 100 and the right electrode 110 of the central capacitor element 100, which have opposite polarities to the second external connection bus bar 400.
- the first external connection busbar 300 is housed in the case 20 with the first insulating sheet 500 attached.
- the first overlapping portion 340 (first portion 311) of the first external connection busbar 300 is overlapped on the second overlapping portion 440 of the second external connection busbar 400 via the first insulating portion 510 of the first insulating sheet 500.
- the first overlapping portion 340 and the second overlapping portion 440 overlap each other when viewed from the top and bottom direction so as to cover the respective peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction in the case 20 and the gaps between the two capacitor elements 100 in the front-back direction.
- the top-bottom direction is a third direction perpendicular to the inner bottom surface 21a of the case 20.
- the second portion 312 of the first body portion 310 of the first external connection busbar 300 and the second portion 412 of the second body portion 410 of the second external connection busbar 400 overlap each other when viewed from the front-to-rear direction via the second insulating portion 520 of the first insulating sheet 500.
- the tip of the first narrow terminal portion 321 of the first internal connection terminal portion 320 of the first external connection bus bar 300 is placed on the first connection terminal portion 220A of the first relay bus bar 200A of the right-most capacitor element unit 40 and placed on the mounting base 23.
- the tip of the first wide terminal portion 322 of the first internal connection terminal portion 320 is placed on the first connection terminal portion 220A of the first relay bus bar 200A of the central and left-most capacitor element units 40 and placed on the two mounting bases 23.
- the three through holes 323 of the first internal connection terminal portion 320 are aligned with the screw holes of the nuts 60 of the three first connection terminal portions 220A.
- a first insulating sheet 500 is interposed between the first external connection bus bar 300 and the second external connection bus bar 400. This ensures insulation between the first external connection bus bar 300 and the second external connection bus bar 400, which are opposite poles.
- the first external connection terminal portion 330 of the first external connection bus bar 300 and the second external connection terminal portion 430 of the second external connection bus bar 400 are disposed at the front end portion of the case 20.
- three bolts 70 are passed through the three through holes 323 of the first internal connection terminal portion 320 of the first external connection bus bar 300 and fastened to the nuts 60 of the first connection terminal portions 220A of the three first relay bus bars 200A.
- the threaded portions (not shown) of the bolts 70 protruding downward from the nuts 60 are received in the second hole portions 25 of the mounting base 23.
- the first internal connection terminal portion 320 and the three first connection terminal portions 220A are fixed in contact with each other by being sandwiched between a bolt 70 and a nut 60, and the first external connection bus bar 300 and the three first relay bus bars 200A are electrically connected.
- the first external connection bus bar 300 and the electrodes 110 of the nine capacitor elements 100 that have the same polarity as the first external connection bus bar 300 are electrically connected via the three first relay bus bars 200A.
- three bolts 70 are passed through three through holes 423 of the second internal connection terminal portion 420 of the second external connection bus bar 400 and fastened to the nuts 60 of the second connection terminal portions 220B of the three second relay bus bars 200B.
- the threaded portions (not shown) of the bolts 70 protruding downward from the nuts 60 are received in the second hole portions 25 of the mounting base 23.
- the second internal connection terminal portion 420 and the three second connection terminal portions 220B are fixed in contact with each other by being sandwiched between a bolt 70 and a nut 60, and the second external connection bus bar 400 and the three second relay bus bars 200B are electrically connected.
- the second external connection bus bar 400 and the electrodes 110 of the nine capacitor elements 100 that have the same polarity as the second external connection bus bar 400 are electrically connected via the three second relay bus bars 200B.
- the stacked first connection terminal portion 220A and first internal connection terminal portion 320, and the stacked second connection terminal portion 220B and second internal connection terminal portion 420 are supported from the inner bottom surface 21a of the case 20 by the mounting portion 22.
- the first connection terminal portion 220A and the second connection terminal portion 220B are fixed in a direction parallel to the inner bottom surface 21a of the case 20 (front-back and left-right directions) by fitting the nuts 60 fixed to them into the first holes 24 of the mounting portion 22. This makes it possible to easily connect the first external connection bus bar 300 to the three first relay bus bars 200A and the second external connection bus bar 400 to the three second relay bus bars 200B using the bolts 70.
- the capacitor assembly 10 is assembled inside the case 20.
- the capacitor assembly 10 is positioned at a predetermined position inside the case 20 by fitting the six nuts 60 into the six first holes 24 of the mounting portion 22.
- the filling resin 30 can be, for example, epoxy, a thermosetting resin.
- the first opening 313, the second opening 413, the third opening 511, and the fourth opening 611 are aligned to form two openings 51 on the left and right that vertically penetrate the first external connection busbar 300, the second external connection busbar 400, the first insulating sheet 500, and the second insulating sheet 600. Therefore, the injected filling resin 30 passes through the two openings 51 and easily spreads to the area of the three capacitor elements 100 below the busbar unit 50. In addition, the injected filling resin 30 can pass through the gap between the two mounting bases 23 and the gap between the mounting base 23 and the inner surface 21b of the case 20, and therefore easily spreads inside the case 20.
- the film capacitor 1 is mounted on an external device such as a vehicle inverter device. External terminals (not shown) from the external device are electrically connected by welding or the like to the first external connection terminal portion 330 and the second external connection terminal portion 430 corresponding to each external terminal.
- first overlapping portion 340 and the second overlapping portion 440 are provided on the first external connection bus bar 300 and the second external connection bus bar 400 side, not on the first relay bus bar 200A and the second relay bus bar 200B side, and these first overlapping portion 340 and the second overlapping portion 440 overlap when viewed from the top and bottom so as to cover the peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction in the case 20 and the gaps that occur between two capacitor elements 100 in the front-back direction.
- the overlapping portion between the first overlapping portion 340 and the second overlapping portion 440 exists not only in the area above the peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction, but also in the area above the gap between two adjacent capacitor elements 100, so that the area of the overlapping portion can be made larger. Therefore, it is expected that the effect of reducing ESL will be enhanced.
- the film capacitor 1 includes three capacitor element units 40, a case 20 in which the three capacitor element units 40 are housed, a filling resin 30 filled in the case 20, a first external connection bus bar 300, and a second external connection bus bar 400.
- Each capacitor element unit 40 has an end face 101 on which an electrode 110 is formed and a peripheral face 102, and includes three capacitor elements 100 arranged in the case 20 along the front-to-rear direction (a first direction parallel to the inner bottom surface 21a of the case 20), a first relay bus bar 200A connected to one electrode 110 of each of the three capacitor elements 100, and a second relay bus bar 200B connected to the other electrode 110 of each of the three capacitor elements 100.
- the three capacitor element units 40 are arranged in the case 20 along the left-right direction (a second direction parallel to the inner bottom surface 21a of the case 20 and perpendicular to the first direction) so that the electrodes 110 of the three capacitor elements 100 in each of two adjacent capacitor element units 40 face each other.
- the first external connection bus bar 300 has a first external connection terminal portion 330 exposed from the filling resin 30 and a first overlap portion 340 configured to be connected to an external terminal, and is connected to the first relay bus bar 200A of each of the three capacitor element units 40 inside the filling resin 30.
- the second external connection bus bar 400 has a second external connection terminal portion 430 exposed from the filling resin 30 and a second overlap portion 440 configured to be connected to an external terminal, and is connected to the second relay bus bar 200B of each of the three capacitor element units 40 inside the filling resin 30.
- the first overlapping portion 340 and the second overlapping portion 440 overlap each other when viewed from the top-bottom direction (a third direction perpendicular to the inner bottom surface 21a of the case 20) so as to cover the peripheral surfaces 102 of each of the three capacitor elements 100 arranged in the left-right direction within the case 20 and the gaps that occur between two adjacent capacitor elements 100 in the left-right direction.
- the first relay bus bar 200A and the second relay bus bar 200B can be connected by soldering to a pair of electrodes 110 of the three capacitor elements 100, respectively, eliminating the need to provide a gap between the two opposing electrodes 110 that would be required for soldering.
- This makes it possible to reduce the gap between the two opposing electrodes 110, allowing the film capacitor 1 to be compactly arranged in the direction in which the three capacitor element units 40 are lined up.
- connection parts between the first external connection bus bar 300 and the three first relay bus bars 200A and the connection parts between the second external connection bus bar 400 and the three second relay bus bars 200B are protected by the filling resin 30, making these connection parts less susceptible to corrosion, etc., and improving the reliability of the film capacitor 1.
- the overlapping portion between the first overlapping portion 340 and the second overlapping portion 440 is not only present in the area above the peripheral surfaces 102 of the three capacitor elements 100 aligned in the left-right direction, but also in the area above the gap between two adjacent capacitor elements 100, so that the area of the overlapping portion can be made larger. This is expected to improve the ESL reduction effect.
- the first external connection terminal portion 330 and the second external connection terminal portion 430 are arranged at the front end portion (end portion in the first direction) of the case 20.
- the first relay bus bar 200A and the second relay bus bar 200B each have a first connection terminal portion 220A and a second connection terminal portion 220B arranged between the two capacitor elements 100 in the front-rear direction (first direction).
- the first external connection bus bar 300 and the second external connection bus bar 400 each have a first internal connection terminal portion 320 to which the first connection terminal portion 220A is connected and a second internal connection terminal portion 420 to which the second connection terminal portion 220B is connected.
- the first external connection terminal portion 330 and the second external connection terminal portion 430 are disposed at the front end portion of the case 20, while the first connection terminal portion 220A and the second connection terminal portion 220B are disposed between the two capacitor elements 100 in the front-rear direction.
- the first overlapping portion 340 and the second overlapping portion 440 cover the peripheral surfaces 102 of the three (first number) capacitor elements 100 arranged in the left-right direction (second direction) at a position closer to the first external connection terminal portion 330 and the second external connection terminal portion 430 than the first connection terminal portion 220A and the second connection terminal portion 220B, but do not cover the peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction at a position farther from the first external connection terminal portion 330 and the second external connection terminal portion 430 than the first connection terminal portion 220A and the second connection terminal portion 220B.
- the first connection terminal portion 220A and the first internal connection terminal portion 320, and the second connection terminal portion 220B and the second internal connection terminal portion 420 are stacked in the vertical direction (third direction) and are fixed in contact with each other by being sandwiched between the bolt 70 and the nut 60.
- this configuration does not expose the capacitor element 100 included in the capacitor element unit 40 to high temperatures during the connection work. Therefore, there is no need to worry about damage to the capacitor element 100 due to heat.
- the case 20 includes a mounting portion 22 that protrudes from the inner bottom surface 21a and on which the overlapped first connection terminal portion 220A and first internal connection terminal portion 320 and the overlapped second connection terminal portion 220B and second internal connection terminal portion 420 are placed.
- a nut 60 is fixed to the first connection terminal portion 220A and the second connection terminal portion 220B that are respectively overlapped on the first internal connection terminal portion 320 and the second internal connection terminal portion 420 on the inner bottom surface 21a side so as to protrude toward the inner bottom surface 21a.
- the mounting portion 22 is provided with a first hole portion 24 (hole portion) into which the nut 60 fits.
- the capacitor assembly 10 assembled by connecting the first external connection bus bar 300 and the second external connection bus bar 400 to the three capacitor element units 40 can be positioned at a predetermined position within the case 20.
- Fig. 10A is a perspective view of a capacitor element unit 40A according to Modification Example 1.
- Fig. 10B is a perspective view of a case 20A according to Modification Example 1.
- each capacitor element unit 40 nuts 60 are fixed to the connection terminal portions 220 (first connection terminal portion 220A, second connection terminal portion 220B) of a pair of relay bus bars 200 (first relay bus bar 200A, second relay bus bar 200B). Then, when three capacitor element units 40 are housed in the case 20, the six nuts 60 are fitted into the first hole portions 24 formed in the six mounting bases 23 of the mounting portion 22.
- each capacitor element unit 40A in each capacitor element unit 40A, the nuts 60 are not fixed to the connection terminal portions 220 of the pair of relay bus bars 200.
- the inner diameter of the through hole 221 formed in each connection terminal portion 220 is made slightly larger than the outer diameter of the stepped portion 61 of the nut 60.
- each nut 60 is fixed to the mounting portion 22, i.e., six mounting tables 23.
- the inner diameter of the first hole portion 24 of each mounting table 23 is made slightly smaller than the outer diameter of the main body portion of the nut 60.
- each nut 60 is press-fitted into each first hole portion 24 and fixed to each first hole portion 24.
- the stepped portion 61 of the nut 60 protrudes from the upper surface of the mounting table 23. At this time, if the peripheral surface of the main body portion of each nut 60 is knurled, each nut 60 can be more firmly fixed to each first hole portion 24.
- connection terminal portions 220 (first connection terminal portion 220A, second connection terminal portion 220B) of a pair of relay bus bars 200 (first relay bus bar 200A, second relay bus bar 200B) are placed on the corresponding mounting bases 23, and the stepped portion 61 of the nut 60 fits into the through hole 221 of the connection terminal portion 220.
- the procedure for assembling the capacitor assembly 10 inside the case 20A thereafter is the same as in the above embodiment.
- the six bolts 70 are fastened to the six nuts 60 to join the first connection terminal portions 220A of the three first relay bus bars 200A to the first internal connection terminal portion 320 of the first external connection bus bar 300, and the second connection terminal portions 220B of the three second relay bus bars 200B to the second internal connection terminal portion 420 of the second external connection bus bar 400.
- the first connection terminal portion 220A and the first internal connection terminal portion 320, and the second connection terminal portion 220B and the second internal connection terminal portion 420 are connected with bolts 70 and nuts 60, and at the same time, the capacitor assembly 10 assembled by connecting the first external connection bus bar 300 and the second external connection bus bar 400 to the three capacitor element units 40 can be positioned at a predetermined position within the case 20.
- first connection terminal portion 220A and first internal connection terminal portion 320, and the stacked second connection terminal portion 220B and second internal connection terminal portion 420 are supported from the inner bottom surface 21a side of the case 20 by the mounting portion 22. Furthermore, the first connection terminal portion 220A and the second connection terminal portion 220B are fixed in a direction along the inner bottom surface 21a of the case 20 (front-rear and left-right directions) by fitting the stepped portion 61 of the nut 60 of the mounting portion 22 into these through holes 221. This makes it possible to easily perform the connection work between the first external connection bus bar 300 and the three first relay bus bars 200A and the connection work between the second external connection bus bar 400 and the three second relay bus bars 200B by the bolt 70.
- the mounting portion 22 provided on the case 20 is divided into six mounting tables 23 with gaps between them.
- the mounting portion 22 may be configured as one mounting table in which the six mounting tables 23 are connected without any gaps.
- the film capacitor 1 is configured so that the opposing electrodes 110 of two adjacent capacitor elements 100 in the left-right direction have the same polarity.
- the film capacitor 1 may also be configured so that the opposing electrodes 110 of two adjacent capacitor elements 100 in the left-right direction have opposite polarities.
- the right relay bus bar 200 becomes the first relay bus bar 200A
- the left relay bus bar 200 becomes the second relay bus bar 200B.
- the first internal connection terminal portion 320 of the first external connection bus bar 300 is configured by three first narrow terminal portions 321, and these three first narrow terminal portions 321 are connected to the three first connection terminal portions 220A.
- the second internal connection terminal portion 420 of the second external connection bus bar 400 is composed of three second narrow terminal portions 421, and these three second narrow terminal portions 421 are connected to the three second connection terminal portions 220B.
- the first insulating sheet 500 is attached to the first external connection bus bar 300 from below.
- the first insulating sheet 500 may be attached to the second external connection bus bar 400 from above. That is, the first insulating sheet 500 and the second insulating sheet 600 may be attached to the second external connection bus bar 400.
- the film capacitor 1 includes three capacitor element units 40.
- the number of capacitor element units 40 included in the film capacitor 1 may be two or four or more, as long as there are more than one.
- the capacitor element unit 40 includes three capacitor elements 100.
- the number of capacitor elements 100 included in the capacitor element unit 40 may be two or four or more, as long as there are more than one.
- connection between the first external connection busbar 300 and the first relay busbar 200A and the connection between the second external connection busbar 400 and the second relay busbar 200B are made by bolts 70 and nuts 60.
- connection between the first external connection busbar 300 and the first relay busbar 200A and the connection between the second external connection busbar 400 and the second relay busbar 200B may be made by other connection methods, such as soldering, welding, crimping, etc.
- the capacitor element 100 is formed by stacking two metallized films with aluminum vapor-deposited on a dielectric film, and then rolling or laminating the stacked metallized films.
- these capacitor elements 100 may also be formed by stacking a metallized film with aluminum vapor-deposited on both sides of a dielectric film and an insulating film, and then rolling or laminating the stacked metallized films.
- a film capacitor 1 is given as an example of a capacitor of the present invention.
- the present invention can also be applied to capacitors other than film capacitors.
- the present invention is useful for capacitors used in various electronic devices, electrical devices, industrial equipment, vehicle electrical equipment, etc.
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Abstract
According to the present invention, a first external connection bus bar comprises a first external connection terminal part that is exposed from a filler resin, and a first overlapping part. The first external connection bus bar is connected to respective first relay bus bars of a plurality of capacitor element units within the filler resin. A second external connection bus bar comprises a second external connection terminal part that is exposed from a filler resin, and a second overlapping part. The second external connection bus bar is connected to respective second relay bus bars of the plurality of capacitor element units within the filler resin. The first overlapping part and the second overlapping part overlap with each other within a case so as to cover the peripheral surfaces of respective capacitor elements of the plurality of capacitor element units and a gap between the capacitor elements of two adjacent capacitor element units.
Description
本発明は、フィルムコンデンサ等のコンデンサに関する。
The present invention relates to capacitors such as film capacitors.
従来、一対の端面と周面とを有し、各端面に電極が形成された複数のコンデンサ素子と、これらコンデンサ素子を収容するケースと、当該ケース内に充填される充填樹脂とを備えるケースモールド型のコンデンサが知られている。
Conventionally, a case-molded capacitor is known that includes a number of capacitor elements each having a pair of end faces and a peripheral surface, with electrodes formed on each end face, a case that houses these capacitor elements, and a filling resin that fills the case.
複数のコンデンサ素子は、ケース内において様々と姿勢と配列を採り得る。たとえば、ケース内において、複数のコンデンサ素子が、ケースの内底面に平行な第1方向では隣接する2つのコンデンサ素子の周面同士が対向し、ケースの内底面に平行かつ第1方向に直交する第2方向では隣接する2つのコンデンサ素子の電極同士が対向するように、マトリクス状に配置される場合がある。かかるコンデンサの一例が、特許文献1に記載されている。
The multiple capacitor elements can take on various positions and arrangements within the case. For example, multiple capacitor elements may be arranged in a matrix within the case such that the peripheral surfaces of two adjacent capacitor elements face each other in a first direction parallel to the inner bottom surface of the case, and the electrodes of two adjacent capacitor elements face each other in a second direction parallel to the inner bottom surface of the case and perpendicular to the first direction. An example of such a capacitor is described in Patent Document 1.
特許文献1のコンデンサでは、第2方向に並ぶ複数のコンデンサ素子の第1端面電極および第2端面電極に、第1中継バスバーおよび第2中継バスバーの電極接続部が半田により接続されてコンデンサ素子ユニットが構成される。複数のコンデンサ素子ユニットが、互いのコンデンサ素子の端面電極同士が対向するように並べられ、各コンデンサ素子ユニットの第1中継バスバーおよび第2中継バスバーの接続端子部が、第1外部接続バスバーおよび第2外部接続バスバーの内部接続端子部に接続されて、コンデンサアセンブリが完成する。コンデンサアセンブリが収容されたケース内に充填樹脂が充填される。第1外部接続バスバーおよび第2外部接続バスバーの外部接続端子部が、充填樹脂から露出して外部端子に接続可能となる。
In the capacitor of Patent Document 1, the electrode connection portions of the first relay busbar and the second relay busbar are soldered to the first end surface electrodes and second end surface electrodes of a plurality of capacitor elements aligned in the second direction to form a capacitor element unit. The plurality of capacitor element units are aligned so that the end surface electrodes of the capacitor elements face each other, and the connection terminal portions of the first relay busbar and the second relay busbar of each capacitor element unit are connected to the internal connection terminal portions of the first external connection busbar and the second external connection busbar to complete the capacitor assembly. A filling resin is filled into the case that houses the capacitor assembly. The external connection terminal portions of the first external connection busbar and the second external connection busbar are exposed from the filling resin and can be connected to external terminals.
このコンデンサでは、複数のコンデンサ素子ユニットが並べられる前に、第1中継バスバーおよび第2中継バスバーを第1端面電極および第2端面電極に半田付けできるので、対向する2つの端面電極の間に、半田付けに必要となる隙間を設けなくてよい。よって、2つの端面電極の間の隙間を小さくできるので、コンデンサ素子ユニットが並ぶ方向に、コンデンサをコンパクトに配置することできる。
In this capacitor, the first relay bus bar and the second relay bus bar can be soldered to the first end surface electrode and the second end surface electrode before the multiple capacitor element units are arranged, so there is no need to provide a gap between the two opposing end surface electrodes that would be required for soldering. This makes it possible to reduce the gap between the two end surface electrodes, allowing the capacitors to be compactly arranged in the direction in which the capacitor element units are arranged.
さらに、このコンデンサでは、各コンデンサ素子ユニットに、第1中継バスバーと第2中継バスバーとがコンデンサ素子の周面上で重なり合う重なり部が設けられる。これにより、ESL(等価直列インダクタンス)を低減することが可能となる。
Furthermore, in this capacitor, each capacitor element unit is provided with an overlapping portion where the first relay bus bar and the second relay bus bar overlap on the peripheral surface of the capacitor element. This makes it possible to reduce the ESL (equivalent series inductance).
本発明の主たる態様に係るコンデンサは、複数のコンデンサ素子ユニットと、前記複数のコンデンサ素子ユニットが収容されるケースと、前記ケース内に充填される充填樹脂と、第1外部接続バスバーと、第2外部接続バスバーと、を備える。
The capacitor according to the main aspect of the present invention comprises a plurality of capacitor element units, a case in which the plurality of capacitor element units are housed, a filling resin filled in the case, a first external connection bus bar, and a second external connection bus bar.
前記複数のコンデンサ素子ユニットのそれぞれは、複数のコンデンサ素子と、第1中継バスバーと、第2中継バスバーと、を含む。前記複数のコンデンサ素子は、前記ケースの内底面に平行な第1方向に沿って前記ケース内に配列される。前記複数のコンデンサ素子のそれぞれは、電極がそれぞれ形成された2つの端面と周面とを有する。前記第1中継バスバーは、前記複数のコンデンサ素子のそれぞれの前記2つの端面の一方の前記電極に接続され、前記第2中継バスバーは、前記複数のコンデンサ素子のそれぞれの前記2つの端面の他方の前記電極に接続される。
Each of the multiple capacitor element units includes multiple capacitor elements, a first relay bus bar, and a second relay bus bar. The multiple capacitor elements are arranged in the case along a first direction parallel to the inner bottom surface of the case. Each of the multiple capacitor elements has two end faces and a circumferential surface on which electrodes are respectively formed. The first relay bus bar is connected to the electrode on one of the two end faces of each of the multiple capacitor elements, and the second relay bus bar is connected to the electrode on the other of the two end faces of each of the multiple capacitor elements.
前記複数のコンデンサ素子ユニットは、前記ケースの内底面に平行かつ前記第1方向に直交する第2方向に沿って前記ケース内に配列される。前記複数のコンデンサ素子ユニットのうちの隣接する2つのコンデンサ素子ユニットの一方における前記複数のコンデンサ素子のそれぞれの前記電極が、前記隣接する2つのコンデンサ素子ユニットの他方における前記複数のコンデンサ素子のうちの対応するコンデンサ素子の前記電極に対向する。
The plurality of capacitor element units are arranged in the case along a second direction that is parallel to the inner bottom surface of the case and perpendicular to the first direction. The electrode of each of the plurality of capacitor elements in one of two adjacent capacitor element units of the plurality of capacitor element units faces the electrode of a corresponding capacitor element of the plurality of capacitor elements in the other of the two adjacent capacitor element units.
前記第1外部接続バスバーは、外部端子に接続されるように構成された、前記充填樹脂から露出する第1外部接続端子部と、第1重なり部とを有し、前記充填樹脂の内部において前記複数のコンデンサ素子ユニットのそれぞれの前記第1中継バスバーに接続される。前記第2外部接続バスバーは、外部端子に接続されるように構成された、前記充填樹脂から露出する第2外部接続端子部と、第2重なり部とを有し、前記充填樹脂の内部において前記複数のコンデンサ素子ユニットのそれぞれの前記第2中継バスバーに接続される。
The first external connection bus bar has a first external connection terminal portion exposed from the filling resin and configured to be connected to an external terminal, a first overlap portion, and is connected to the first relay bus bar of each of the plurality of capacitor element units inside the filling resin. The second external connection bus bar has a second external connection terminal portion exposed from the filling resin and configured to be connected to an external terminal, a second overlap portion, and is connected to the second relay bus bar of each of the plurality of capacitor element units inside the filling resin.
前記第1重なり部および前記第2重なり部は、前記複数のコンデンサ素子ユニット内の前記第2方向に配列された前記複数のコンデンサ素子のそれぞれの周面と、前記第2方向に配列された前記複数のコンデンサ素子のうちの前記第2方向において隣接する2つのコンデンサ素子の間に生じる隙間とを覆うように、前記ケース内において前記ケースの内底面と直交する第3方向から見て互いに重なり合う。
The first overlapping portion and the second overlapping portion overlap each other when viewed from a third direction perpendicular to the inner bottom surface of the case within the case so as to cover the peripheral surfaces of each of the capacitor elements arranged in the second direction within the capacitor element units, and the gaps that occur between two adjacent capacitor elements in the second direction among the capacitor elements arranged in the second direction.
本発明によれば、複数のコンデンサ素子が、縦横の一方の配列方向において、隣接する2つのコンデンサ素子の電極同士が対向するように、ケース内にマトリクス状に配置される構成が採られる場合に、コンパクト化を図ることができ、かつ、ESLの低減効果の向上が期待できるコンデンサを提供することができる。
The present invention provides a capacitor that can be made compact and is expected to have an improved ESL reduction effect when multiple capacitor elements are arranged in a matrix inside a case such that the electrodes of two adjacent capacitor elements face each other in one of the vertical and horizontal arrangement directions.
本発明の効果ないし意義は、以下に示す実施の形態の説明により更に明らかとなろう。ただし、以下に示す実施の形態は、あくまでも、本発明を実施化する際の一つの例示であって、本発明は、以下の実施の形態に記載されたものに何ら制限されるものではない。
The effects and significance of the present invention will become clearer from the explanation of the embodiment shown below. However, the embodiment shown below is merely one example of how the present invention can be put into practice, and the present invention is in no way limited to the embodiment described below.
特許文献1のコンデンサでは、ESLを低減するためのバスバー同士の重なり部が、第1方向に並ぶ複数のコンデンサ素子の周面の上の領域のみに存在するように設けられており、当該重なり部が、2つのコンデンサ素子の間に生じる隙間の上の領域には存在していない。
In the capacitor of Patent Document 1, the overlapping portions between the busbars to reduce ESL are provided only in the area above the peripheral surfaces of the multiple capacitor elements aligned in the first direction, and the overlapping portions do not exist in the area above the gap between the two capacitor elements.
そこで、各コンデンサ素子の周面の上の領域のみならず、隣接する2つのコンデンサ素子の隙間の上の領域に存在するように、バスバー同士の重なり部を設けることができれば、全体として、重なり部の面積を広くすることができ、ESLの低減効果の向上が期待できる。
If it were possible to provide overlapping portions between the busbars so that they exist not only in the area above the periphery of each capacitor element, but also in the area above the gap between two adjacent capacitor elements, the overall area of the overlapping portions could be increased, which is expected to improve the ESL reduction effect.
本発明は、複数のコンデンサ素子が、縦横の一方の配列方向において、隣接する2つのコンデンサ素子の電極同士が対向するように、ケース内にマトリクス状に配置される構成が採られる場合に、コンパクト化を図ることができ、かつ、ESLの低減効果の向上が期待できるコンデンサを提供する。
The present invention provides a capacitor that can be made compact and is expected to have an improved ESL reduction effect when multiple capacitor elements are arranged in a matrix inside a case so that the electrodes of two adjacent capacitor elements face each other in one of the vertical and horizontal arrangement directions.
以下、本発明のコンデンサの一実施形態であるフィルムコンデンサ1について図を参照して説明する。便宜上、各図には、適宜、前後、左右および上下の方向が付記されている。なお、図示の方向は、あくまでフィルムコンデンサ1の相対的な方向を示すものであり、絶対的な方向を示すものではない。
Below, a film capacitor 1, which is one embodiment of a capacitor according to the present invention, will be described with reference to the drawings. For convenience, the front-rear, left-right, and up-down directions are indicated in each drawing as appropriate. Note that the directions shown in the drawings indicate only the relative directions of the film capacitor 1, and do not indicate absolute directions.
図1Aは、フィルムコンデンサ1の斜視図であり、図1Bは、ケース20内に充填樹脂30が充填される前のフィルムコンデンサ1の斜視図である。
FIG. 1A is a perspective view of the film capacitor 1, and FIG. 1B is a perspective view of the film capacitor 1 before the filling resin 30 is filled into the case 20.
図1Aおよび図1Bに示すように、フィルムコンデンサ1は、コンデンサアセンブリ10と、コンデンサアセンブリ10が収容されるケース20と、ケース20内に充填される充填樹脂30とを備える。コンデンサアセンブリ10は、複数の(本実施の形態では3つの)コンデンサ素子ユニット40と、これらコンデンサ素子ユニット40が連結されるバスバーユニット50とを含む。コンデンサアセンブリ10の充填樹脂30に埋没した大部分が、ケース20および充填樹脂30により、湿気や衝撃から保護される。
As shown in Figures 1A and 1B, the film capacitor 1 comprises a capacitor assembly 10, a case 20 in which the capacitor assembly 10 is housed, and a filled resin 30 filled in the case 20. The capacitor assembly 10 includes a plurality of capacitor element units 40 (three in this embodiment) and a bus bar unit 50 to which these capacitor element units 40 are connected. Most of the capacitor assembly 10 buried in the filled resin 30 is protected from moisture and impact by the case 20 and the filled resin 30.
図2Aおよび図2Bは、コンデンサ素子ユニット40の斜視図である。図3は、ナット60が分離された状態の一対の中継バスバー200の斜視図である。
FIGS. 2A and 2B are perspective views of the capacitor element unit 40. FIG. 3 is a perspective view of a pair of relay bus bars 200 with the nuts 60 separated.
コンデンサ素子ユニット40は、複数の(本実施の形態では3つの)コンデンサ素子100と、一対の中継バスバー200とを含む。
The capacitor element unit 40 includes a plurality of capacitor elements 100 (three in this embodiment) and a pair of relay bus bars 200.
コンデンサ素子100は、誘電体フィルム上にアルミニウムを蒸着させた2枚の金属化フィルムを重ね、重ねた金属化フィルムを巻回または積層し、扁平状に押圧することにより形成される。コンデンサ素子100は、長円柱に近い形状に形成され、一対の端面101と、周面102とを有する。周面102は、互いに平行な2つの平坦面102aと、これら平坦面102aを繋ぐ2つの湾曲面102bとを含む。コンデンサ素子100には、一対の端面101のそれぞれに、亜鉛等の金属の吹付けにより電極110が形成される。
Capacitor element 100 is formed by stacking two metallized films, each of which has aluminum vapor-deposited on a dielectric film, rolling or laminating the stacked metallized films, and pressing them into a flat shape. Capacitor element 100 is formed in a shape close to an oval cylinder, and has a pair of end faces 101 and a peripheral surface 102. Peripheral surface 102 includes two flat surfaces 102a that are parallel to each other, and two curved surfaces 102b that connect these flat surfaces 102a. Capacitor element 100 has electrodes 110 formed on each of the pair of end faces 101 by spraying a metal such as zinc.
なお、コンデンサ素子100は、亜鉛、マグネシウム等、アルミニウム以外の金属を蒸着させた金属化フィルムにより形成されてもよい。あるいは、コンデンサ素子100は、これらの金属のうち、複数の金属を蒸着させた金属化フィルムにより形成されてもよいし、これらの金属どうしの合金を蒸着させた金属化フィルムにより形成されてもよい。
In addition, the capacitor element 100 may be formed from a metallized film on which a metal other than aluminum, such as zinc or magnesium, is vapor-deposited. Alternatively, the capacitor element 100 may be formed from a metallized film on which multiple of these metals are vapor-deposited, or from a metallized film on which an alloy of these metals is vapor-deposited.
一対の中継バスバー200は、導電性材料、たとえば、銅板を適宜切り抜き、折り曲げることによって形成され、所定形状の板状を有する。一対の中継バスバー200は、互いに左右方向に反転した形状を有する。
The pair of relay busbars 200 are formed by appropriately cutting and bending a conductive material, for example, a copper plate, and have a plate shape of a predetermined shape. The pair of relay busbars 200 have shapes that are inverted from each other in the left-right direction.
各中継バスバー200は、本体部210と、接続端子部220とを含む。本体部210は、細長い板状を有して、その表面が左右方向を向く第1部分211と、第1部分211の後上端部に繋がり、細長い板状を有して、その表面が上下方向を向く第2部分212とを含む。本体部210には、第1部分211の前部と第2部分212の前部および後部とに、電極接続部である一対の電極ピン213が、下方に突出するように形成される。
Each relay busbar 200 includes a main body 210 and a connection terminal 220. The main body 210 includes a first portion 211 having an elongated plate shape with its surface facing in the left-right direction, and a second portion 212 connected to the rear upper end of the first portion 211, having an elongated plate shape with its surface facing in the up-down direction. A pair of electrode pins 213, which are electrode connection portions, are formed on the main body 210 at the front of the first portion 211 and at the front and rear of the second portion 212 so as to protrude downward.
接続端子部220は、第1部分211の上端であって、第2部分212から前方に少し離れた位置に設けられる。接続端子部220は、ほぼ方形の板状を有し、その表面が上下方向を向く。
The connection terminal portion 220 is located at the upper end of the first portion 211, slightly forward from the second portion 212. The connection terminal portion 220 has a substantially rectangular plate shape, and its surface faces in the vertical direction.
接続端子部220には、ナット60が固定される。ナット60は、圧入ナットであり、扁平な円筒状を有し、一端面に段付き加工がなされており、その段付部分61の周面にローレット加工がなされている。接続端子部220には円形の貫通孔221が形成されており、当該貫通孔221にナット60の段付部分61が下方から圧入される。接続端子部220の下面から、ナット60が下方に突出する。
A nut 60 is fixed to the connection terminal portion 220. The nut 60 is a press-fit nut having a flat cylindrical shape with a step on one end face and a knurled circumferential surface of the stepped portion 61. A circular through hole 221 is formed in the connection terminal portion 220, and the stepped portion 61 of the nut 60 is press-fitted into the through hole 221 from below. The nut 60 protrudes downward from the underside of the connection terminal portion 220.
コンデンサ素子ユニット40において、3つのコンデンサ素子100は、互いの周面102(湾曲面102b)同士が対向するように前後方向に並ぶ。前から1番目のコンデンサ素子100と2番目のコンデンサ素子100との隙間は、前から2番目のコンデンサ素子100と3番目のコンデンサ素子100との隙間よりも大きくされる。
In the capacitor element unit 40, the three capacitor elements 100 are arranged in the front-to-rear direction so that their peripheral surfaces 102 (curved surfaces 102b) face each other. The gap between the first capacitor element 100 and the second capacitor element 100 from the front is made larger than the gap between the second capacitor element 100 and the third capacitor element 100 from the front.
一対の中継バスバー200は、本体部210の第2部分212が後側の2つのコンデンサ素子100の周面102(平坦面102a)に載るように、3つのコンデンサ素子100に設置される。一対の中継バスバー200のそれぞれの一対の電極ピン213が、3つのコンデンサ素子100の一対の電極110のそれぞれに接触し、半田付けにより接続される。これにより、一対の中継バスバー200が3つのコンデンサ素子100の一対の電極110に電気的に接続される。
The pair of relay busbars 200 are installed on the three capacitor elements 100 so that the second portion 212 of the main body 210 rests on the peripheral surface 102 (flat surface 102a) of the two rear capacitor elements 100. The pair of electrode pins 213 of each of the pair of relay busbars 200 contacts each of the pair of electrodes 110 of the three capacitor elements 100 and is connected by soldering. This electrically connects the pair of relay busbars 200 to the pair of electrodes 110 of the three capacitor elements 100.
一対の中継バスバー200の接続端子部220は、前から1番目のコンデンサ素子100と2番目のコンデンサ素子100と間に配置される。
The connection terminal portions 220 of the pair of relay busbars 200 are positioned between the first capacitor element 100 and the second capacitor element 100 from the front.
図4は、バスバーユニット50の分解斜視図である。
Figure 4 is an exploded perspective view of the busbar unit 50.
バスバーユニット50は、第1外部接続バスバー300と、第2外部接続バスバー400と、第1絶縁シート500と、第2絶縁シート600とを含む。第1外部接続バスバー300には、下方から第1絶縁シート500が接着剤等により貼り付けられる。第2外部接続バスバー400には、下方から第2絶縁シート600が接着剤等により貼り付けられる。バスバーユニット50が3つのコンデンサ素子ユニット40に連結される際、第1外部接続バスバー300と第2外部接続バスバー400とが上下方向に重ね合わされる。
The busbar unit 50 includes a first external connection busbar 300, a second external connection busbar 400, a first insulating sheet 500, and a second insulating sheet 600. The first insulating sheet 500 is attached to the first external connection busbar 300 from below with an adhesive or the like. The second insulating sheet 600 is attached to the second external connection busbar 400 from below with an adhesive or the like. When the busbar unit 50 is connected to the three capacitor element units 40, the first external connection busbar 300 and the second external connection busbar 400 are stacked in the vertical direction.
図5Aは、第1外部接続バスバー300の斜視図であり、図5Bは、第2外部接続バスバー400の斜視図である。
FIG. 5A is a perspective view of the first external connection bus bar 300, and FIG. 5B is a perspective view of the second external connection bus bar 400.
第1外部接続バスバー300および第2外部接続バスバー400は、導電性材料、たとえば、銅板を適宜切り抜き、折り曲げることによって形成され、所定形状の板状を有する。
The first external connection bus bar 300 and the second external connection bus bar 400 are formed by appropriately cutting and bending a conductive material, for example a copper plate, and have a plate shape of a predetermined shape.
第1外部接続バスバー300は、第1本体部310と、第1内部接続端子部320と、第1外部接続端子部330とを含む。
The first external connection busbar 300 includes a first main body portion 310, a first internal connection terminal portion 320, and a first external connection terminal portion 330.
第1本体部310は、L字に折り曲げられたほぼ長方形の板状を有し、その表面が上下方向を向く第1部分311と、第1部分311の前端縁から立ち上り、表面が前後方向を向く第2部分312とを含む。第1部分311は、第1重なり部340となる。第1本体部310には、第1部分311(第1重なり部340)に、ほぼ方形状を有し、左右方向に並ぶ2つの第1開口部313が形成される。
The first main body 310 has a generally rectangular plate shape bent into an L-shape, and includes a first portion 311 whose surface faces in the vertical direction, and a second portion 312 that rises from the front edge of the first portion 311 and whose surface faces in the front-to-rear direction. The first portion 311 forms the first overlapping portion 340. In the first main body 310, two first openings 313, which are generally square and aligned in the left-right direction, are formed in the first portion 311 (first overlapping portion 340).
第1内部接続端子部320は、第1本体部310の第1部分311の後方に設けられ、左右方向に幅の狭い第1幅狭端子部321と、左右方向に幅の広い第1幅広端子部322とにより構成される。第1幅狭端子部321は、第1部分311の右端部から後方に延び出し、第1幅広端子部322は、第1部分311の左端部よりも少し内側(右側)から後方に延び出す。第1幅狭端子部321および第1幅広端子部322は、先端部が基端部よりも一段低くなるように中間部が下り傾斜する。第1内部接続端子部320には、第1幅狭端子部321の先端部に1つの貫通孔323が形成されており、第1幅広端子部322の先端部に、左右方向に並んで、2つの貫通孔323が形成されている。
The first internal connection terminal portion 320 is provided at the rear of the first portion 311 of the first main body portion 310, and is composed of a first narrow terminal portion 321 that is narrow in the left-right direction and a first wide terminal portion 322 that is wide in the left-right direction. The first narrow terminal portion 321 extends rearward from the right end of the first portion 311, and the first wide terminal portion 322 extends rearward from a position slightly inside (right side) the left end of the first portion 311. The first narrow terminal portion 321 and the first wide terminal portion 322 have intermediate portions that slope downward so that the tip portions are one step lower than the base portions. In the first internal connection terminal portion 320, one through hole 323 is formed at the tip portion of the first narrow terminal portion 321, and two through holes 323 are formed side by side in the left-right direction at the tip portion of the first wide terminal portion 322.
第1外部接続端子部330は、細長い長方形の板状を有し、第1本体部310の第2部分312の上端縁から後方に水平に延び出す。
The first external connection terminal portion 330 has a long, narrow rectangular plate shape and extends horizontally rearward from the upper edge of the second portion 312 of the first main body portion 310.
第2外部接続バスバー400は、第2本体部410と、第2内部接続端子部420と、第2外部接続端子部430とを含む。
The second external connection busbar 400 includes a second main body portion 410, a second internal connection terminal portion 420, and a second external connection terminal portion 430.
第2本体部410は、L字に折り曲げられたほぼ長方形の板状を有し、その表面が上下方向を向く第1部分411と、第1部分411の前端縁から立ち上り、表面が前後方向を向く第2部分412とを含む。第1部分411は、第2重なり部440となる。第2本体部410には、第1部分411(第2重なり部440)に、ほぼ方形状を有し、左右方向に並ぶ2つの第2開口部413が形成される。
The second main body 410 has a generally rectangular plate shape bent into an L-shape, and includes a first portion 411 whose surface faces in the vertical direction, and a second portion 412 that rises from the front edge of the first portion 411 and whose surface faces in the front-to-rear direction. The first portion 411 forms the second overlapping portion 440. In the second main body 410, two second openings 413, which are generally square and aligned in the left-right direction, are formed in the first portion 411 (second overlapping portion 440).
第2内部接続端子部420は、第2本体部410の第1部分411の後方に設けられ、左右方向に幅の狭い第2幅狭端子部421と、左右方向に幅の広い第2幅広端子部422とにより構成される。第2幅狭端子部421は、第1部分411の左端部から後方に延び出し、第2幅広端子部422は、第1部分411の右端部よりも少し内側(左側)から後方に延び出す。第2幅狭端子部421および第2幅広端子部422は、先端部が基端部よりも一段低くなるように中間部が下り傾斜する。第2内部接続端子部420には、第2幅狭端子部421の先端部に1つの貫通孔423が形成されており、第2幅広端子部422の先端部に、左右方向に並んで、2つの貫通孔423が形成されている。
The second internal connection terminal 420 is provided at the rear of the first portion 411 of the second main body 410, and is composed of a second narrow terminal 421 that is narrow in the left-right direction and a second wide terminal 422 that is wide in the left-right direction. The second narrow terminal 421 extends rearward from the left end of the first portion 411, and the second wide terminal 422 extends rearward from a position slightly inside (left side) the right end of the first portion 411. The second narrow terminal 421 and the second wide terminal 422 have intermediate portions that slope downward so that the tip ends are one step lower than the base ends. In the second internal connection terminal 420, one through hole 423 is formed at the tip of the second narrow terminal 421, and two through holes 423 are formed side by side in the left-right direction at the tip of the second wide terminal 422.
第2外部接続端子部430は、細長い長方形の板状を有し、第2本体部410の第2部分412の上端縁から前方に水平に延び出す。
The second external connection terminal portion 430 has a long, narrow rectangular plate shape and extends horizontally forward from the upper edge of the second portion 412 of the second main body portion 410.
図6Aは、第1絶縁シート500の斜視図であり、図6Bは、第2絶縁シート600の斜視図である。
FIG. 6A is a perspective view of the first insulating sheet 500, and FIG. 6B is a perspective view of the second insulating sheet 600.
第1絶縁シート500および第2絶縁シート600は、絶縁紙や、アクリル、シリコン等の絶縁性を有する樹脂材料により形成された絶縁体である。
The first insulating sheet 500 and the second insulating sheet 600 are insulators made of insulating paper or resin materials with insulating properties such as acrylic or silicone.
第1絶縁シート500は、長方形状を有する第1絶縁部510と、第1絶縁部510の前端縁から立ち上がる細長い長方形状の第2絶縁部520と、第1絶縁部510の後端縁から後方に延びる第3絶縁部530とを含む。第1絶縁部510には、ほぼ方形状を有し、左右方向に並ぶ2つの第3開口部511が形成される。第3開口部511の口径は、第1外部接続バスバー300の第1開口部313の口径よりも小さくされている。第3絶縁部530は、第1絶縁部510の右端部に存在し、左右方向に幅の狭い、方形状の第1幅狭部531と、第1絶縁部510の左端部より少し内側(右側)に存在し、左右方向に幅の広い、方形状の第1幅広部532とにより構成される。
The first insulating sheet 500 includes a first insulating portion 510 having a rectangular shape, a second insulating portion 520 having an elongated rectangular shape rising from the front edge of the first insulating portion 510, and a third insulating portion 530 extending rearward from the rear edge of the first insulating portion 510. The first insulating portion 510 has two third openings 511 that are substantially rectangular and aligned in the left-right direction. The diameter of the third openings 511 is smaller than the diameter of the first openings 313 of the first external connection busbar 300. The third insulating portion 530 is composed of a first narrow portion 531 that is rectangular and narrow in the left-right direction and is located at the right end of the first insulating portion 510, and a first wide portion 532 that is rectangular and wide in the left-right direction and is located slightly inside (right side) of the left end of the first insulating portion 510.
第1外部接続バスバー300に第1絶縁シート500が貼り付けられた状態において、第1本体部310の第1部分311(第1重なり部340)の下側に第1絶縁部510が位置し、第1本体部310の第2部分312の前側に第2絶縁部520が位置し、第1内部接続端子部320の第1幅狭端子部321および第1幅広端子部322の下側に、それぞれ、第3絶縁部530の第1幅狭部531および第1幅広部532が位置する。第1開口部313の中心位置と第3開口部511の中心位置とが互いに整合する。
When the first insulating sheet 500 is attached to the first external connection busbar 300, the first insulating portion 510 is located below the first portion 311 (first overlapping portion 340) of the first main body portion 310, the second insulating portion 520 is located in front of the second portion 312 of the first main body portion 310, and the first narrow portion 531 and first wide portion 532 of the third insulating portion 530 are located below the first narrow terminal portion 321 and first wide terminal portion 322 of the first internal connection terminal portion 320, respectively. The center position of the first opening 313 and the center position of the third opening 511 are aligned with each other.
第2絶縁シート600は、長方形状を有する第1絶縁部610と、第1絶縁部610の前端縁から僅かに立ち上がる細長い長方形状の第2絶縁部620と、第1絶縁部610の後端縁から後方に延びる第3絶縁部630とを含む。第1絶縁部610には、ほぼ方形状を有し、左右方向に並ぶ2つの第4開口部611が形成される。第4開口部611の口径は、第2外部接続バスバー400の第2開口部413の口径よりも小さくされている。第3絶縁部630は、第1絶縁部610の左端部に存在し、左右方向に幅の狭い、方形状の第2幅狭部631と、第1絶縁部610の右端部より少し内側(左側)に存在し、左右方向に幅の広い、方形状の第2幅広部632とにより構成される。
The second insulating sheet 600 includes a first insulating portion 610 having a rectangular shape, a second insulating portion 620 having an elongated rectangular shape that rises slightly from the front edge of the first insulating portion 610, and a third insulating portion 630 that extends rearward from the rear edge of the first insulating portion 610. The first insulating portion 610 has two fourth openings 611 that are substantially rectangular and aligned in the left-right direction. The diameter of the fourth openings 611 is smaller than the diameter of the second openings 413 of the second external connection bus bar 400. The third insulating portion 630 is composed of a second narrow portion 631 that is rectangular and narrow in the left-right direction and is located at the left end of the first insulating portion 610, and a second wide portion 632 that is rectangular and wide in the left-right direction and is located slightly inside (left side) of the right end of the first insulating portion 610.
第2外部接続バスバー400に第2絶縁シート600が貼り付けられた状態において、第2本体部410の第1部分411(第2重なり部440)の下側に第1絶縁部610が位置し、第2本体部410の第2部分412の前側に第2絶縁部620が位置し、第2内部接続端子部420の第2幅狭端子部421および第2幅広端子部422の下側に、それぞれ、第3絶縁部630の第2幅狭部631および第2幅広部632が位置する。第2開口部413の中心位置と第4開口部611の中心位置とが整合する。
When the second insulating sheet 600 is attached to the second external connection busbar 400, the first insulating portion 610 is located below the first portion 411 (second overlapping portion 440) of the second main body portion 410, the second insulating portion 620 is located in front of the second portion 412 of the second main body portion 410, and the second narrow portion 631 and the second wide portion 632 of the third insulating portion 630 are located below the second narrow terminal portion 421 and the second wide terminal portion 422 of the second internal connection terminal portion 420, respectively. The center position of the second opening 413 and the center position of the fourth opening 611 are aligned.
図7Aは、ケース20の斜視図であり、図7Bは、載置台23の位置で切断されたケース20の側面断面図である。
FIG. 7A is a perspective view of the case 20, and FIG. 7B is a side cross-sectional view of the case 20 cut at the position of the mounting table 23.
ケース20は、ポリフェニレンサルファイド等の樹脂材料により形成され、前後方向に長いほぼ直方体の箱状に形成され、上面が開口する。ケース20の内底面21aには、当該内底面21aから突出するように、載置部22が設けられる。載置部22は、左右方向に並ぶ6つの載置台23に分かれている。隣接する2つの載置台23の間には所定の隙間が設けられる。さらに、左右両端の載置台23とケース20の左右の内側面21bとの間にも所定の隙間が設けられる。
The case 20 is made of a resin material such as polyphenylene sulfide, and is formed in the shape of a roughly rectangular parallelepiped box that is long in the front-to-rear direction and has an open top. A mounting portion 22 is provided on the inner bottom surface 21a of the case 20 so as to protrude from the inner bottom surface 21a. The mounting portion 22 is divided into six mounting tables 23 lined up in the left-right direction. A predetermined gap is provided between any two adjacent mounting tables 23. In addition, a predetermined gap is provided between the mounting tables 23 at both the left and right ends and the left and right inner surfaces 21b of the case 20.
各載置台23は、ほぼ四角柱状を有し、その上面が平坦な面となる。各載置台23の上面(載置面)には、第1穴部24が形成される。即ち、載置部22には、6つの第1穴部24が設けられる。第1穴部24は、ナット60の形状に対応して、扁平な円柱形状を有する。第1穴部24の内径は、ナット60の外径より僅かに大きくされ、第1穴部24の深さは、中継バスバー200の下面からのナット60の突出量よりも僅かに大きくされる。
Each mounting base 23 has a substantially rectangular prism shape with a flat upper surface. A first hole portion 24 is formed in the upper surface (mounting surface) of each mounting base 23. That is, six first hole portions 24 are provided in the mounting portion 22. The first hole portions 24 have a flat cylindrical shape corresponding to the shape of the nut 60. The inner diameter of the first hole portion 24 is slightly larger than the outer diameter of the nut 60, and the depth of the first hole portion 24 is slightly larger than the amount of protrusion of the nut 60 from the underside of the relay busbar 200.
第1穴部24の底面中央には、第2穴部25が形成される。第2穴部25は、ナット60に締結されるボルト70のネジ部の形状に対応して、円柱状を有する。第2穴部25の内径は、ボルト70のネジ部の外径より僅かに大きくされ、第2穴部25の深さは、ナット60からのボルト70のネジ部の突出量よりも十分に大きくされる。
A second hole 25 is formed in the center of the bottom surface of the first hole 24. The second hole 25 has a cylindrical shape corresponding to the shape of the threaded portion of the bolt 70 that is fastened to the nut 60. The inner diameter of the second hole 25 is slightly larger than the outer diameter of the threaded portion of the bolt 70, and the depth of the second hole 25 is sufficiently larger than the amount by which the threaded portion of the bolt 70 protrudes from the nut 60.
3つのコンデンサ素子ユニット40とバスバーユニット50とが、ケース20内において連結されることにより、コンデンサアセンブリ10が組み上がる。同時に、コンデンサアセンブリ10がケース20内に収容された状態となる。
The three capacitor element units 40 and the busbar unit 50 are connected inside the case 20 to form the capacitor assembly 10. At the same time, the capacitor assembly 10 is housed inside the case 20.
図8A、図8Bおよび図9A、図9Bは、コンデンサアセンブリ10の組み立てについて説明するための図である。
Figures 8A, 8B, 9A, and 9B are diagrams for explaining the assembly of the capacitor assembly 10.
まず、図8Aに示すように、3つのコンデンサ素子ユニット40がケース20内に収容される。ケース20内において、3つのコンデンサ素子ユニット40は、隣接する2つのコンデンサ素子ユニット40における3つのコンデンサ素子100の電極110同士が対向するように、ケース20の内底面21a上に左右方向に配置される。また、各コンデンサ素子ユニット40の3つのコンデンサ素子100は、ケース20の内底面21a上に前後方向に配置される。
First, as shown in FIG. 8A, three capacitor element units 40 are housed in the case 20. Within the case 20, the three capacitor element units 40 are arranged in the left-right direction on the inner bottom surface 21a of the case 20 such that the electrodes 110 of the three capacitor elements 100 in two adjacent capacitor element units 40 face each other. In addition, the three capacitor elements 100 of each capacitor element unit 40 are arranged in the front-rear direction on the inner bottom surface 21a of the case 20.
こうして、ケース20内には、9つ(縦横に3つずつ)のコンデンサ素子100が、前後の配列方向では隣接する2つのコンデンサ素子100の周面102(湾曲面102b)同士が対向し、左右の配列方向では隣接する2つのコンデンサ素子100の電極110同士が対向するように、マトリクス状に配置される。なお、前後方向は、ケース20の内底面21aに平行な第1方向であり、左右方向は、ケース20の内底面21aに平行かつ第1方向に直交する第2方向である。
Thus, nine capacitor elements 100 (three vertically and three horizontally) are arranged in a matrix within the case 20, such that the peripheral surfaces 102 (curved surfaces 102b) of two adjacent capacitor elements 100 face each other in the front-to-back arrangement direction, and the electrodes 110 of two adjacent capacitor elements 100 face each other in the left-to-right arrangement direction. Note that the front-to-back direction is a first direction parallel to the inner bottom surface 21a of the case 20, and the left-to-right direction is a second direction parallel to the inner bottom surface 21a of the case 20 and perpendicular to the first direction.
コンデンサ素子ユニット40では、既に、一対の中継バスバー200と3つのコンデンサ素子100の一対の電極110との半田による接続が完了している。このため、半田付け作業に必要な間隔を設けなくともよいため、隣接する2つのコンデンサ素子ユニット40の間隔を小さくできる。
In the capacitor element unit 40, the pair of relay bus bars 200 and the pair of electrodes 110 of the three capacitor elements 100 have already been connected by soldering. This means that there is no need to provide the spacing required for the soldering work, and the spacing between two adjacent capacitor element units 40 can be made smaller.
本実施の形態では、右端と左端のコンデンサ素子ユニット40の3つのコンデンサ素子100の右側の電極110と、中央のコンデンサ素子ユニット40の3つのコンデンサ素子100の左側の電極110とが同極(たとえば、正極)となる。さらに、右端と左端のコンデンサ素子ユニット40の3つのコンデンサ素子100の左側の電極110と、中央のコンデンサ素子ユニット40の3つのコンデンサ素子100の右側の電極110とが同極(たとえば、負極)となる。よって、左右方向において、隣接する2つのコンデンサ素子100は、同極の電極110同士が対向する。これにより、対向する電極110同士の間に絶縁距離を確保しなくてよく、隣接する2つのコンデンサ素子ユニット40の間隔を一層小さくできる。
In this embodiment, the right electrodes 110 of the three capacitor elements 100 of the right-most and left-most capacitor element units 40 and the left electrodes 110 of the three capacitor elements 100 of the central capacitor element unit 40 are of the same polarity (for example, positive). Furthermore, the left electrodes 110 of the three capacitor elements 100 of the right-most and left-most capacitor element units 40 and the right electrodes 110 of the three capacitor elements 100 of the central capacitor element unit 40 are of the same polarity (for example, negative). Therefore, in the left-right direction, the electrodes 110 of the same polarity of two adjacent capacitor elements 100 face each other. This makes it unnecessary to secure an insulating distance between the facing electrodes 110, and the distance between two adjacent capacitor element units 40 can be further reduced.
さらに、本実施の形態において、右端と左端のコンデンサ素子ユニット40では、右側の中継バスバー200および左側の中継バスバー200が、それぞれ第1中継バスバー200Aおよび第2中継バスバー200Bとなり、右側の中継バスバー200の接続端子部220および左側の中継バスバー200の接続端子部220が、それぞれ第1接続端子部220Aおよび第2接続端子部220Bとなる。一方、中央のコンデンサ素子ユニット40では、左側の中継バスバー200および右側の中継バスバー200が、それぞれ第1中継バスバー200Aおよび第2中継バスバー200Bとなり、左側の中継バスバー200の接続端子部220および右側の中継バスバー200の接続端子部220が、それぞれ第1接続端子部220Aおよび第2接続端子部220Bとなる。
Furthermore, in this embodiment, in the right-end and left-end capacitor element units 40, the right-side relay busbar 200 and the left-side relay busbar 200 are the first relay busbar 200A and the second relay busbar 200B, respectively, and the connection terminal portion 220 of the right-side relay busbar 200 and the connection terminal portion 220 of the left-side relay busbar 200 are the first connection terminal portion 220A and the second connection terminal portion 220B, respectively. On the other hand, in the central capacitor element unit 40, the left-side relay busbar 200 and the right-side relay busbar 200 are the first relay busbar 200A and the second relay busbar 200B, respectively, and the connection terminal portion 220 of the left-side relay busbar 200 and the connection terminal portion 220 of the right-side relay busbar 200 are the first connection terminal portion 220A and the second connection terminal portion 220B, respectively.
ケース20内において、各コンデンサ素子ユニット40の前から1番目のコンデンサ素子100と2番目のコンデンサ素子100との間に載置部22の各載置台23が位置する。各コンデンサ素子ユニット40における第1中継バスバー200Aの第1接続端子部220Aと第2中継バスバー200Bの第2接続端子部220Bが、それぞれに対応する載置台23に載せられる。これら接続端子部220A、220Bに固定されてケース20の内底面21aに向かって突出するナット60が、載置台23の第1穴部24に嵌まり込む。
In the case 20, each mounting base 23 of the mounting portion 22 is located between the first capacitor element 100 and the second capacitor element 100 from the front of each capacitor element unit 40. The first connection terminal portion 220A of the first relay bus bar 200A and the second connection terminal portion 220B of the second relay bus bar 200B in each capacitor element unit 40 are placed on the corresponding mounting base 23. Nuts 60 fixed to these connection terminal portions 220A, 220B and protruding toward the inner bottom surface 21a of the case 20 fit into the first hole portion 24 of the mounting base 23.
次に、図8Bに示すように、第2外部接続バスバー400が、第2絶縁シート600が装着された状態で、ケース20内に収容される。ケース20内において、第2外部接続バスバー400の第2重なり部440(第1部分411)および第2内部接続端子部420が、左右方向に並ぶ一番前の3つのコンデンサ素子100、即ち3つのコンデンサ素子ユニット40の一番前のコンデンサ素子100の周面102上に載せられる。第2内部接続端子部420の第2幅狭端子部421の先端部が、左端のコンデンサ素子ユニット40の第2中継バスバー200Bの第2接続端子部220Bの上に重ねられ、載置台23に載せられる。また、第2内部接続端子部420の第2幅広端子部422の先端部が、中央および右端のコンデンサ素子ユニット40の第2中継バスバー200Bの第2接続端子部220Bの上に重ねられ、2つの載置台23に載せられる。第2内部接続端子部420の3つの貫通孔423が、3つの第2接続端子部220Bのナット60のネジ孔に整合する。
8B, the second external connection bus bar 400 is housed in the case 20 with the second insulating sheet 600 attached. Inside the case 20, the second overlapping portion 440 (first portion 411) and the second internal connection terminal portion 420 of the second external connection bus bar 400 are placed on the peripheral surface 102 of the three front capacitor elements 100 lined up in the left-right direction, i.e., the front capacitor element 100 of the three capacitor element units 40. The tip portion of the second narrow terminal portion 421 of the second internal connection terminal portion 420 is placed on the second connection terminal portion 220B of the second relay bus bar 200B of the leftmost capacitor element unit 40 and placed on the mounting base 23. In addition, the tip of the second wide terminal portion 422 of the second internal connection terminal portion 420 is placed on top of the second connection terminal portion 220B of the second relay bus bar 200B of the central and right-end capacitor element units 40, and placed on the two mounting bases 23. The three through holes 423 of the second internal connection terminal portion 420 are aligned with the screw holes of the nuts 60 of the three second connection terminal portions 220B.
第2外部接続バスバー400と3つのコンデンサ素子100の周面102との間には第2絶縁シート600が介在している。これにより、第2外部接続バスバー400とは異極となる、右端のコンデンサ素子100の左側の電極110および中央のコンデンサ素子100の右側の電極110と、第2外部接続バスバー400との間の絶縁性が確保される。
A second insulating sheet 600 is interposed between the second external connection bus bar 400 and the peripheral surfaces 102 of the three capacitor elements 100. This ensures insulation between the second external connection bus bar 400 and the left electrode 110 of the right-most capacitor element 100 and the right electrode 110 of the central capacitor element 100, which have opposite polarities to the second external connection bus bar 400.
次に、図9Aに示すように、第1外部接続バスバー300が、第1絶縁シート500が装着された状態で、ケース20内に収容される。ケース20内において、第1外部接続バスバー300の第1重なり部340(第1部分311)が、第2外部接続バスバー400の第2重なり部440の上に、第1絶縁シート500の第1絶縁部510を介して重ね合される。これにより、第1重なり部340および第2重なり部440は、ケース20内において左右方向に配列された3つのコンデンサ素子100のそれぞれの周面102と、前後方向において2つのコンデンサ素子100の間に生じる隙間とを覆うように、上下方向から見て互いに重なり合う。なお、上下方向は、ケース20の内底面21aと直交する第3方向である。
Next, as shown in FIG. 9A, the first external connection busbar 300 is housed in the case 20 with the first insulating sheet 500 attached. In the case 20, the first overlapping portion 340 (first portion 311) of the first external connection busbar 300 is overlapped on the second overlapping portion 440 of the second external connection busbar 400 via the first insulating portion 510 of the first insulating sheet 500. As a result, the first overlapping portion 340 and the second overlapping portion 440 overlap each other when viewed from the top and bottom direction so as to cover the respective peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction in the case 20 and the gaps between the two capacitor elements 100 in the front-back direction. The top-bottom direction is a third direction perpendicular to the inner bottom surface 21a of the case 20.
さらに、第1外部接続バスバー300の第1本体部310の第2部分312と第2外部接続バスバー400の第2本体部410の第2部分412とが、第1絶縁シート500の第2絶縁部520を介して前後方向から見て互いに重なり合う。
Furthermore, the second portion 312 of the first body portion 310 of the first external connection busbar 300 and the second portion 412 of the second body portion 410 of the second external connection busbar 400 overlap each other when viewed from the front-to-rear direction via the second insulating portion 520 of the first insulating sheet 500.
第1外部接続バスバー300における第1内部接続端子部320の第1幅狭端子部321の先端部が、右端のコンデンサ素子ユニット40の第1中継バスバー200Aの第1接続端子部220Aの上に重ねられ、載置台23に載せられる。また、第1内部接続端子部320の第1幅広端子部322の先端部が、中央および左端のコンデンサ素子ユニット40の第1中継バスバー200Aの第1接続端子部220Aの上に重ねられ、2つの載置台23に載せられる。第1内部接続端子部320の3つの貫通孔323が、3つの第1接続端子部220Aのナット60のネジ孔に整合する。
The tip of the first narrow terminal portion 321 of the first internal connection terminal portion 320 of the first external connection bus bar 300 is placed on the first connection terminal portion 220A of the first relay bus bar 200A of the right-most capacitor element unit 40 and placed on the mounting base 23. The tip of the first wide terminal portion 322 of the first internal connection terminal portion 320 is placed on the first connection terminal portion 220A of the first relay bus bar 200A of the central and left-most capacitor element units 40 and placed on the two mounting bases 23. The three through holes 323 of the first internal connection terminal portion 320 are aligned with the screw holes of the nuts 60 of the three first connection terminal portions 220A.
第1外部接続バスバー300と第2外部接続バスバー400との間には第1絶縁シート500が介在している。これにより、互いに異極となる第1外部接続バスバー300と第2外部接続バスバー400との間の絶縁性が確保される。
A first insulating sheet 500 is interposed between the first external connection bus bar 300 and the second external connection bus bar 400. This ensures insulation between the first external connection bus bar 300 and the second external connection bus bar 400, which are opposite poles.
第1外部接続バスバー300の第1外部接続端子部330および第2外部接続バスバー400の第2外部接続端子部430は、ケース20の前端部に配置される。
The first external connection terminal portion 330 of the first external connection bus bar 300 and the second external connection terminal portion 430 of the second external connection bus bar 400 are disposed at the front end portion of the case 20.
最後に、図9Bに示すように、3つのボルト70が、第1外部接続バスバー300の第1内部接続端子部320の3つの貫通孔323を通されて3つの第1中継バスバー200Aの各第1接続端子部220Aのナット60に締結される。ナット60から下方に突出するボルト70のネジ部(図示せず)が、載置台23の第2穴部25に収容される。
Finally, as shown in FIG. 9B, three bolts 70 are passed through the three through holes 323 of the first internal connection terminal portion 320 of the first external connection bus bar 300 and fastened to the nuts 60 of the first connection terminal portions 220A of the three first relay bus bars 200A. The threaded portions (not shown) of the bolts 70 protruding downward from the nuts 60 are received in the second hole portions 25 of the mounting base 23.
第1内部接続端子部320と3つの第1接続端子部220Aとがボルト70とナット60で挟み込まれることにより接触して固定され、第1外部接続バスバー300と3つの第1中継バスバー200Aとが電気的に接続される。これにより、第1外部接続バスバー300と、9つのコンデンサ素子100における第1外部接続バスバー300と同極の電極110とが、3つの第1中継バスバー200Aを介して電気的に接続される。
The first internal connection terminal portion 320 and the three first connection terminal portions 220A are fixed in contact with each other by being sandwiched between a bolt 70 and a nut 60, and the first external connection bus bar 300 and the three first relay bus bars 200A are electrically connected. As a result, the first external connection bus bar 300 and the electrodes 110 of the nine capacitor elements 100 that have the same polarity as the first external connection bus bar 300 are electrically connected via the three first relay bus bars 200A.
同様に、3つのボルト70が、第2外部接続バスバー400の第2内部接続端子部420の3つの貫通孔423を通されて3つの第2中継バスバー200Bの各第2接続端子部220Bのナット60に締結される。ナット60から下方に突出するボルト70のネジ部(図示せず)が、載置台23の第2穴部25に収容される。
Similarly, three bolts 70 are passed through three through holes 423 of the second internal connection terminal portion 420 of the second external connection bus bar 400 and fastened to the nuts 60 of the second connection terminal portions 220B of the three second relay bus bars 200B. The threaded portions (not shown) of the bolts 70 protruding downward from the nuts 60 are received in the second hole portions 25 of the mounting base 23.
第2内部接続端子部420と3つの第2接続端子部220Bとがボルト70とナット60で挟み込まれることにより接触して固定され、第2外部接続バスバー400と3つの第2中継バスバー200Bとが電気的に接続される。これにより、第2外部接続バスバー400と、9つのコンデンサ素子100における第2外部接続バスバー400と同極の電極110とが、3つの第2中継バスバー200Bを介して電気的に接続される。
The second internal connection terminal portion 420 and the three second connection terminal portions 220B are fixed in contact with each other by being sandwiched between a bolt 70 and a nut 60, and the second external connection bus bar 400 and the three second relay bus bars 200B are electrically connected. As a result, the second external connection bus bar 400 and the electrodes 110 of the nine capacitor elements 100 that have the same polarity as the second external connection bus bar 400 are electrically connected via the three second relay bus bars 200B.
重ねられた第1接続端子部220Aおよび第1内部接続端子部320と、重ねられた第2接続端子部220Bおよび第2内部接続端子部420は、載置部22によりケース20の内底面21a側から支えられている。また、第1接続端子部220Aおよび第2接続端子部220Bは、これらに固定されたナット60が載置部22の第1穴部24に嵌め込まれることにより、ケース20の内底面21aに平行な方向(前後左右方向)に固定されている。これにより、ボルト70による第1外部接続バスバー300と3つの第1中継バスバー200Aとの接続作業および第2外部接続バスバー400と3つの第2中継バスバー200Bとの接続作業を容易に行うことが可能となる。
The stacked first connection terminal portion 220A and first internal connection terminal portion 320, and the stacked second connection terminal portion 220B and second internal connection terminal portion 420 are supported from the inner bottom surface 21a of the case 20 by the mounting portion 22. The first connection terminal portion 220A and the second connection terminal portion 220B are fixed in a direction parallel to the inner bottom surface 21a of the case 20 (front-back and left-right directions) by fitting the nuts 60 fixed to them into the first holes 24 of the mounting portion 22. This makes it possible to easily connect the first external connection bus bar 300 to the three first relay bus bars 200A and the second external connection bus bar 400 to the three second relay bus bars 200B using the bolts 70.
こうして、ケース20内において、コンデンサアセンブリ10が組み上がる。コンデンサアセンブリ10は、6つのナット60が載置部22の6つの第1穴部24に嵌め込まれることにより、ケース20内において、所定の位置に位置決めされた状態となる。
In this way, the capacitor assembly 10 is assembled inside the case 20. The capacitor assembly 10 is positioned at a predetermined position inside the case 20 by fitting the six nuts 60 into the six first holes 24 of the mounting portion 22.
コンデンサアセンブリ10が組み上がると、ケース20内に液相状態の充填樹脂30が注入される。充填樹脂30は、たとえば、熱硬化性樹脂であるエポキシとされ得る。
Once the capacitor assembly 10 is assembled, a liquid-phase filling resin 30 is injected into the case 20. The filling resin 30 can be, for example, epoxy, a thermosetting resin.
バスバーユニット50では、第1開口部313、第2開口部413、第3開口部511および第4開口部611が整合することにより、第1外部接続バスバー300、第2外部接続バスバー400、第1絶縁シート500および第2絶縁シート600を上下方向に貫通する左右2つの開口部51が形成されている。このため、注入された充填樹脂30は、2つの開口部51を通過することにより、バスバーユニット50の下の3つのコンデンサ素子100の領域に行き渡りやすい。また、注入された充填樹脂30は、2つの載置台23の隙間、載置台23とケース20の内側面21bとの隙間を通過できので、ケース20内に行き渡りやすい。
In the busbar unit 50, the first opening 313, the second opening 413, the third opening 511, and the fourth opening 611 are aligned to form two openings 51 on the left and right that vertically penetrate the first external connection busbar 300, the second external connection busbar 400, the first insulating sheet 500, and the second insulating sheet 600. Therefore, the injected filling resin 30 passes through the two openings 51 and easily spreads to the area of the three capacitor elements 100 below the busbar unit 50. In addition, the injected filling resin 30 can pass through the gap between the two mounting bases 23 and the gap between the mounting base 23 and the inner surface 21b of the case 20, and therefore easily spreads inside the case 20.
液相状態の充填樹脂30がケース20内に満たされると、ケース20内が加熱されて充填樹脂30が硬化する。こうして、図1Aに示すように、フィルムコンデンサ1が完成する。
When the liquid-phase filling resin 30 is filled into the case 20, the inside of the case 20 is heated and the filling resin 30 hardens. In this way, the film capacitor 1 is completed as shown in Figure 1A.
本実施の形態において、コンデンサ素子100は、その周面102の2つの平坦面102aが並ぶ方向に扁平な形状を有している。フィルムコンデンサ1では、9つのコンデンサ素子100が、その平坦面102aがケース20の内底面21aに接触するように、即ち扁平な方向がケース20の深さ方向となるように、ケース20内に配置されている。これにより、低背型のフィルムコンデンサ1が実現されている。
In this embodiment, the capacitor element 100 has a flat shape in the direction in which the two flat surfaces 102a of its peripheral surface 102 are aligned. In the film capacitor 1, nine capacitor elements 100 are arranged inside the case 20 so that the flat surfaces 102a are in contact with the inner bottom surface 21a of the case 20, i.e., so that the flat direction is the depth direction of the case 20. This results in a low-profile film capacitor 1.
フィルムコンデンサ1において、第1外部接続端子部330と第2外部接続端子部430とを含むバスバーユニット50の一部が充填樹脂30から露出する。一方、第1外部接続バスバー300と3つの第1中継バスバー200Aとの接続部分、即ち第1内部接続端子部320と3つの第1接続端子部220Aは、充填樹脂30に埋没する。同様に、第2外部接続バスバー400と3つの第2中継バスバー200Bとの接続部分、即ち第2内部接続端子部420と3つの第2接続端子部220Bも、充填樹脂30に埋没する。これにより、上記接続部分に腐食などが生じにくい。さらに、6つのボルト70も充填樹脂30に埋没する。これにより、6つのボルト70が緩みにくく、また、腐食しにくい。
In the film capacitor 1, a portion of the busbar unit 50 including the first external connection terminal portion 330 and the second external connection terminal portion 430 is exposed from the filling resin 30. Meanwhile, the connection portion between the first external connection busbar 300 and the three first relay busbars 200A, i.e., the first internal connection terminal portion 320 and the three first connection terminal portions 220A, is embedded in the filling resin 30. Similarly, the connection portion between the second external connection busbar 400 and the three second relay busbars 200B, i.e., the second internal connection terminal portion 420 and the three second connection terminal portions 220B, is also embedded in the filling resin 30. This makes it difficult for corrosion to occur in the above connection portions. Furthermore, the six bolts 70 are also embedded in the filling resin 30. This makes the six bolts 70 less likely to loosen and less likely to corrode.
フィルムコンデンサ1は、車両のインバータ装置等、外部装置に搭載される。外部装置からの外部端子(図示せず)が、各外部端子に対応する第1外部接続端子部330および第2外部接続端子部430に、溶接等によって電気的に接続される。
The film capacitor 1 is mounted on an external device such as a vehicle inverter device. External terminals (not shown) from the external device are electrically connected by welding or the like to the first external connection terminal portion 330 and the second external connection terminal portion 430 corresponding to each external terminal.
フィルムコンデンサ1に通電が行われると、第1外部接続バスバー300および第2外部接続バスバー400において、互いに重なり合う第1重なり部340および第2重なり部440には、相反する方向に電流が流れる。これにより、インダクタンス成分の相殺が生じるので、フィルムコンデンサ1が有するESLが低減する。
When electricity is applied to the film capacitor 1, current flows in opposite directions through the overlapping first overlapping portion 340 and second overlapping portion 440 of the first external connection bus bar 300 and the second external connection bus bar 400. This cancels out the inductance components, reducing the ESL of the film capacitor 1.
本実施の形態では、第1中継バスバー200Aおよび第2中継バスバー200B側ではなく、第1外部接続バスバー300および第2外部接続バスバー400側に第1重なり部340および第2重なり部440が設けられ、これら第1重なり部340および第2重なり部440が、ケース20内において左右方向に配列された3つのコンデンサ素子100のそれぞれの周面102と、前後方向において2つのコンデンサ素子100の間に生じる隙間とを覆うように、上下方向から見て重なり合う。即ち、第1重なり部340と第2重なり部440とが重なり合う部分が、左右方向に並ぶ3つのコンデンサ素子100の周面102の上の領域のみならず、隣接する2つのコンデンサ素子100の隙間の上の領域にも存在する結果、重なり合う部分の面積を広くすることができる。よって、ESLの低減効果が高まることが期待できる。
In this embodiment, the first overlapping portion 340 and the second overlapping portion 440 are provided on the first external connection bus bar 300 and the second external connection bus bar 400 side, not on the first relay bus bar 200A and the second relay bus bar 200B side, and these first overlapping portion 340 and the second overlapping portion 440 overlap when viewed from the top and bottom so as to cover the peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction in the case 20 and the gaps that occur between two capacitor elements 100 in the front-back direction. In other words, the overlapping portion between the first overlapping portion 340 and the second overlapping portion 440 exists not only in the area above the peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction, but also in the area above the gap between two adjacent capacitor elements 100, so that the area of the overlapping portion can be made larger. Therefore, it is expected that the effect of reducing ESL will be enhanced.
さらに、本実施の形態では、第1外部接続バスバー300の第1本体部310の第2部分312と第2外部接続バスバー400の第2本体部410の第2部分412との重なり部分においても、相反する方向に電流が流れる。これにより、フィルムコンデンサ1が有するESLが一層低減する。
Furthermore, in this embodiment, currents also flow in opposite directions in the overlapping portion between the second portion 312 of the first body portion 310 of the first external connection bus bar 300 and the second portion 412 of the second body portion 410 of the second external connection bus bar 400. This further reduces the ESL of the film capacitor 1.
<実施の形態の効果>
以上、本実施の形態によれば、以下の効果が奏される。 <Effects of the embodiment>
As described above, according to the present embodiment, the following effects are achieved.
以上、本実施の形態によれば、以下の効果が奏される。 <Effects of the embodiment>
As described above, according to the present embodiment, the following effects are achieved.
フィルムコンデンサ1は、3つのコンデンサ素子ユニット40と、3つのコンデンサ素子ユニット40が収容されるケース20と、ケース20内に充填される充填樹脂30と、第1外部接続バスバー300と、第2外部接続バスバー400と、を備える。各コンデンサ素子ユニット40は、電極110が形成された端面101と周面102とを有し、前後方向(ケース20の内底面21aに平行な第1方向)に沿ってケース20内に配列される3つのコンデンサ素子100と、3つのコンデンサ素子100のそれぞれの一方の電極110に接続される第1中継バスバー200Aと、3つのコンデンサ素子100のそれぞれの他方の電極110に接続される第2中継バスバー200Bと、を含む。3つのコンデンサ素子ユニット40は、隣接する2つのコンデンサ素子ユニット40のそれぞれにおける3つのコンデンサ素子100の電極110同士が対向するように、左右方向(ケース20の内底面21aに平行かつ第1方向に直交する第2方向)に沿ってケース20内に配列される。第1外部接続バスバー300は、外部端子に接続されるように構成された、充填樹脂30から露出する第1外部接続端子部330と、第1重なり部340とを有し、充填樹脂30の内部において3つのコンデンサ素子ユニット40のそれぞれの第1中継バスバー200Aに接続される。第2外部接続バスバー400は、外部端子に接続されるように構成された、充填樹脂30から露出する第2外部接続端子部430と、第2重なり部440とを有し、充填樹脂30の内部において3つのコンデンサ素子ユニット40のそれぞれの第2中継バスバー200Bに接続される。第1重なり部340および第2重なり部440は、ケース20内において左右方向に配列された3つのコンデンサ素子100のそれぞれの周面102と、左右方向において隣接する2つのコンデンサ素子100の間に生じる隙間とを覆うように、上下方向(ケース20の内底面21aと直交する第3方向)から見て互いに重なり合う。
The film capacitor 1 includes three capacitor element units 40, a case 20 in which the three capacitor element units 40 are housed, a filling resin 30 filled in the case 20, a first external connection bus bar 300, and a second external connection bus bar 400. Each capacitor element unit 40 has an end face 101 on which an electrode 110 is formed and a peripheral face 102, and includes three capacitor elements 100 arranged in the case 20 along the front-to-rear direction (a first direction parallel to the inner bottom surface 21a of the case 20), a first relay bus bar 200A connected to one electrode 110 of each of the three capacitor elements 100, and a second relay bus bar 200B connected to the other electrode 110 of each of the three capacitor elements 100. The three capacitor element units 40 are arranged in the case 20 along the left-right direction (a second direction parallel to the inner bottom surface 21a of the case 20 and perpendicular to the first direction) so that the electrodes 110 of the three capacitor elements 100 in each of two adjacent capacitor element units 40 face each other. The first external connection bus bar 300 has a first external connection terminal portion 330 exposed from the filling resin 30 and a first overlap portion 340 configured to be connected to an external terminal, and is connected to the first relay bus bar 200A of each of the three capacitor element units 40 inside the filling resin 30. The second external connection bus bar 400 has a second external connection terminal portion 430 exposed from the filling resin 30 and a second overlap portion 440 configured to be connected to an external terminal, and is connected to the second relay bus bar 200B of each of the three capacitor element units 40 inside the filling resin 30. The first overlapping portion 340 and the second overlapping portion 440 overlap each other when viewed from the top-bottom direction (a third direction perpendicular to the inner bottom surface 21a of the case 20) so as to cover the peripheral surfaces 102 of each of the three capacitor elements 100 arranged in the left-right direction within the case 20 and the gaps that occur between two adjacent capacitor elements 100 in the left-right direction.
この構成によれば、3つのコンデンサ素子ユニット40が互いの3つのコンデンサ素子100の電極110同士が対向するようにケース20内に配列される前に、第1中継バスバー200Aおよび第2中継バスバー200Bを、それぞれ、3つのコンデンサ素子100の一対の電極110に半田により接続できるので、対向する2つの電極110の間に、半田付け作業に必要となる隙間を設けなくてよくなる。よって、対向する2つの電極110の間の隙間を小さくできるので、3つのコンデンサ素子ユニット40が並ぶ方向に、フィルムコンデンサ1をコンパクトに配置することができる。
With this configuration, before the three capacitor element units 40 are arranged inside the case 20 so that the electrodes 110 of the three capacitor elements 100 face each other, the first relay bus bar 200A and the second relay bus bar 200B can be connected by soldering to a pair of electrodes 110 of the three capacitor elements 100, respectively, eliminating the need to provide a gap between the two opposing electrodes 110 that would be required for soldering. This makes it possible to reduce the gap between the two opposing electrodes 110, allowing the film capacitor 1 to be compactly arranged in the direction in which the three capacitor element units 40 are lined up.
さらに、第1外部接続バスバー300と3つの第1中継バスバー200Aとの接続部分および第2外部接続バスバー400と3つの第2中継バスバー200Bとの接続部分が充填樹脂30により保護されるので、これら接続部分に腐食などが生じにくく、フィルムコンデンサ1の信頼性が高まる。
Furthermore, the connection parts between the first external connection bus bar 300 and the three first relay bus bars 200A and the connection parts between the second external connection bus bar 400 and the three second relay bus bars 200B are protected by the filling resin 30, making these connection parts less susceptible to corrosion, etc., and improving the reliability of the film capacitor 1.
さらに、第1重なり部340と第2重なり部440とが重なり合う部分が、左右方向に並ぶ3つのコンデンサ素子100の周面102の上の領域のみならず、隣接する2つのコンデンサ素子100の隙間の上の領域にも存在する結果、重なり合う部分の面積を広くすることができる。これにより、ESLの低減効果の向上が期待できる。
Furthermore, the overlapping portion between the first overlapping portion 340 and the second overlapping portion 440 is not only present in the area above the peripheral surfaces 102 of the three capacitor elements 100 aligned in the left-right direction, but also in the area above the gap between two adjacent capacitor elements 100, so that the area of the overlapping portion can be made larger. This is expected to improve the ESL reduction effect.
さらに、フィルムコンデンサ1において、第1外部接続端子部330および第2外部接続端子部430は、ケース20の前端部(第1方向における端部)に配置される。この場合に、第1中継バスバー200Aおよび第2中継バスバー200Bは、それぞれ、前後方向(第1方向)における2つのコンデンサ素子100の間に配置された第1接続端子部220Aおよび第2接続端子部220Bを有する。さらに、第1外部接続バスバー300および第2外部接続バスバー400は、それぞれ、第1接続端子部220Aが接続される第1内部接続端子部320および第2接続端子部220Bが接続される第2内部接続端子部420を有する。
Furthermore, in the film capacitor 1, the first external connection terminal portion 330 and the second external connection terminal portion 430 are arranged at the front end portion (end portion in the first direction) of the case 20. In this case, the first relay bus bar 200A and the second relay bus bar 200B each have a first connection terminal portion 220A and a second connection terminal portion 220B arranged between the two capacitor elements 100 in the front-rear direction (first direction). Furthermore, the first external connection bus bar 300 and the second external connection bus bar 400 each have a first internal connection terminal portion 320 to which the first connection terminal portion 220A is connected and a second internal connection terminal portion 420 to which the second connection terminal portion 220B is connected.
この構成によれば、第1外部接続端子部330および第2外部接続端子部430が、ケース20の前端部に配置されているのに対して、第1接続端子部220Aおよび第2接続端子部220Bが、前後方向における2つのコンデンサ素子100の間に配置されている。これにより、第1外部接続バスバー300および第2外部接続バスバー400において、第1外部接続端子部330および第2外部接続端子部430と第1接続端子部220Aおよび第2接続端子部220Bとの間に存在する、左右方向(第2方向)に並ぶ3つのコンデンサ素子100の周面102の上に存在するように、第1重なり部340および第2重なり部440を容易に設けることができる。
With this configuration, the first external connection terminal portion 330 and the second external connection terminal portion 430 are disposed at the front end portion of the case 20, while the first connection terminal portion 220A and the second connection terminal portion 220B are disposed between the two capacitor elements 100 in the front-rear direction. This makes it possible to easily provide the first overlap portion 340 and the second overlap portion 440 in the first external connection bus bar 300 and the second external connection bus bar 400 so that they are present on the peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction (second direction) between the first external connection terminal portion 330 and the second external connection terminal portion 430 and the first connection terminal portion 220A and the second connection terminal portion 220B.
さらに、フィルムコンデンサ1において、第1重なり部340および第2重なり部440は、第1接続端子部220Aおよび第2接続端子部220Bよりも第1外部接続端子部330および第2外部接続端子部430に近い位置の左右方向(第2方向)に配列された3つ(第1個数)のコンデンサ素子100のそれぞれの周面102を覆い、第1接続端子部220Aおよび第2接続端子部220Bよりも第1外部接続端子部330および第2外部接続端子部430から遠い位置の左右方向に配列された3つのコンデンサ素子100のそれぞれの周面102を覆わない。
Furthermore, in the film capacitor 1, the first overlapping portion 340 and the second overlapping portion 440 cover the peripheral surfaces 102 of the three (first number) capacitor elements 100 arranged in the left-right direction (second direction) at a position closer to the first external connection terminal portion 330 and the second external connection terminal portion 430 than the first connection terminal portion 220A and the second connection terminal portion 220B, but do not cover the peripheral surfaces 102 of the three capacitor elements 100 arranged in the left-right direction at a position farther from the first external connection terminal portion 330 and the second external connection terminal portion 430 than the first connection terminal portion 220A and the second connection terminal portion 220B.
第1重なり部340および第2重なり部440が上記遠い位置の3つのコンデンサ素子100のそれぞれの周面102を覆っても、この部分は、電流が流れないためにESLの低減に寄与しない。この構成によれば、第1重なり部340および第2重なり部440が上記遠い位置の3つのコンデンサ素子100のそれぞれの周面102を覆わないので、これら重なり部340、440のサイズが無駄に増加しにくく、材料コストおよび重量を低減できる。
Even if the first overlapping portion 340 and the second overlapping portion 440 cover the peripheral surfaces 102 of the three capacitor elements 100 in the farther positions, this portion does not contribute to reducing the ESL because no current flows through it. With this configuration, since the first overlapping portion 340 and the second overlapping portion 440 do not cover the peripheral surfaces 102 of the three capacitor elements 100 in the farther positions, the size of these overlapping portions 340, 440 is unlikely to increase unnecessarily, and material costs and weight can be reduced.
さらに、フィルムコンデンサ1において、第1接続端子部220Aと第1内部接続端子部320、および、第2接続端子部220Bと第2内部接続端子部420は、それぞれ、上下方向(第3方向)に重ねられてボルト70とナット60で挟み込まれることにより接触して固定されている。
Furthermore, in the film capacitor 1, the first connection terminal portion 220A and the first internal connection terminal portion 320, and the second connection terminal portion 220B and the second internal connection terminal portion 420 are stacked in the vertical direction (third direction) and are fixed in contact with each other by being sandwiched between the bolt 70 and the nut 60.
この構成によれば、第1接続端子部220Aと第1内部接続端子部320、および、第2接続端子部220Bと第2内部接続端子部420が半田付けにより結合される構成と違って、接続作業の際に、コンデンサ素子ユニット40に含まれるコンデンサ素子100が高温の熱に晒される虞がない。よって、コンデンサ素子100の熱による損傷を懸念せずに済む。
Unlike a configuration in which the first connection terminal portion 220A and the first internal connection terminal portion 320, and the second connection terminal portion 220B and the second internal connection terminal portion 420 are connected by soldering, this configuration does not expose the capacitor element 100 included in the capacitor element unit 40 to high temperatures during the connection work. Therefore, there is no need to worry about damage to the capacitor element 100 due to heat.
さらに、フィルムコンデンサ1において、ケース20は、内底面21aから突出し、重ねられた第1接続端子部220Aおよび第1内部接続端子部320と重ねられた第2接続端子部220Bおよび第2内部接続端子部420とが載せられる載置部22を含む。内底面21a側で第1内部接続端子部320および第2内部接続端子部420にそれぞれ重ねられる第1接続端子部220Aおよび第2接続端子部220Bには、ナット60が内底面21aに向かって突出するように固定される。載置部22には、ナット60が嵌まり込む第1穴部24(穴部)が設けられる。
Furthermore, in the film capacitor 1, the case 20 includes a mounting portion 22 that protrudes from the inner bottom surface 21a and on which the overlapped first connection terminal portion 220A and first internal connection terminal portion 320 and the overlapped second connection terminal portion 220B and second internal connection terminal portion 420 are placed. A nut 60 is fixed to the first connection terminal portion 220A and the second connection terminal portion 220B that are respectively overlapped on the first internal connection terminal portion 320 and the second internal connection terminal portion 420 on the inner bottom surface 21a side so as to protrude toward the inner bottom surface 21a. The mounting portion 22 is provided with a first hole portion 24 (hole portion) into which the nut 60 fits.
この構成によれば、ナット60を第1穴部24に嵌め込むことにより、3つのコンデンサ素子ユニット40に第1外部接続バスバー300および第2外部接続バスバー400が連結されて組み上げられたコンデンサアセンブリ10を、ケース20内において、所定の位置に位置決めできる。
With this configuration, by fitting the nut 60 into the first hole portion 24, the capacitor assembly 10 assembled by connecting the first external connection bus bar 300 and the second external connection bus bar 400 to the three capacitor element units 40 can be positioned at a predetermined position within the case 20.
以上、本発明の実施の形態について説明したが、本発明は、上記実施の形態に限定されるものではなく、また、本発明の適用例も、上記実施の形態の他に、種々の変更が可能である。
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications to the application examples of the present invention are possible in addition to the above embodiment.
<変更例1>
図10Aは、変更例1に係る、コンデンサ素子ユニット40Aの斜視図である。図10Bは、変更例1に係る、ケース20Aの斜視図である。 <Modification 1>
Fig. 10A is a perspective view of acapacitor element unit 40A according to Modification Example 1. Fig. 10B is a perspective view of a case 20A according to Modification Example 1.
図10Aは、変更例1に係る、コンデンサ素子ユニット40Aの斜視図である。図10Bは、変更例1に係る、ケース20Aの斜視図である。 <
Fig. 10A is a perspective view of a
本実施の形態では、各コンデンサ素子ユニット40において、一対の中継バスバー200(第1中継バスバー200A、第2中継バスバー200B)の接続端子部220(第1接続端子部220A、第2接続端子部220B)にナット60が固定されている。そして、3つのコンデンサ素子ユニット40がケース20内に収容されたときに、6つのナット60が、載置部22の6つの載置台23に形成された第1穴部24に嵌め込まれる。
In this embodiment, in each capacitor element unit 40, nuts 60 are fixed to the connection terminal portions 220 (first connection terminal portion 220A, second connection terminal portion 220B) of a pair of relay bus bars 200 (first relay bus bar 200A, second relay bus bar 200B). Then, when three capacitor element units 40 are housed in the case 20, the six nuts 60 are fitted into the first hole portions 24 formed in the six mounting bases 23 of the mounting portion 22.
これに対し、本変更例では、図10A示すように、各コンデンサ素子ユニット40Aにおいて、一対の中継バスバー200の接続端子部220にナット60が固定されていない。各接続端子部220に形成された貫通孔221は、その内径がナット60の段付部分61の外径よりも僅かに大きくされる。
In contrast, in this modified example, as shown in FIG. 10A, in each capacitor element unit 40A, the nuts 60 are not fixed to the connection terminal portions 220 of the pair of relay bus bars 200. The inner diameter of the through hole 221 formed in each connection terminal portion 220 is made slightly larger than the outer diameter of the stepped portion 61 of the nut 60.
さらに、本変更例では、図10B示すように、6つのナット60が、載置部22、即ち6つの載置台23に固定される。各載置台23の第1穴部24は、その内径がナット60の本体部分の外径よりも僅かに小さくされる。そして、各ナット60は、各第1穴部24に圧入され、各第1穴部24に固定される。ナット60の段付部分61が載置台23の上面から突出する。このとき、各ナット60の本体部分の周面にローレット加工が施されていると、各ナット60を各第1穴部24により強固に固定できる。
Furthermore, in this modified example, as shown in FIG. 10B, six nuts 60 are fixed to the mounting portion 22, i.e., six mounting tables 23. The inner diameter of the first hole portion 24 of each mounting table 23 is made slightly smaller than the outer diameter of the main body portion of the nut 60. Then, each nut 60 is press-fitted into each first hole portion 24 and fixed to each first hole portion 24. The stepped portion 61 of the nut 60 protrudes from the upper surface of the mounting table 23. At this time, if the peripheral surface of the main body portion of each nut 60 is knurled, each nut 60 can be more firmly fixed to each first hole portion 24.
3つ(第1個数)のコンデンサ素子ユニット40がケース20に収容されると、一対の中継バスバー200(第1中継バスバー200A、第2中継バスバー200B)の接続端子部220(第1接続端子部220A、第2接続端子部220B)がそれぞれに対応する載置台23に載せられ、ナット60の段付部分61が接続端子部220の貫通孔221に嵌まり込む。
When three (first number) capacitor element units 40 are housed in the case 20, the connection terminal portions 220 (first connection terminal portion 220A, second connection terminal portion 220B) of a pair of relay bus bars 200 (first relay bus bar 200A, second relay bus bar 200B) are placed on the corresponding mounting bases 23, and the stepped portion 61 of the nut 60 fits into the through hole 221 of the connection terminal portion 220.
その後のケース20A内でのコンデンサアセンブリ10の組み立て手順は、上記実施の形態と同様である。最終的には、図9Bのように、6つのボルト70が6つのナット60に締結されることにより、3つの第1中継バスバー200Aの第1接続端子部220Aと第1外部接続バスバー300の第1内部接続端子部320とが結合されるとともに、3つの第2中継バスバー200Bの第2接続端子部220Bと第2外部接続バスバー400の第2内部接続端子部420とが結合される。
The procedure for assembling the capacitor assembly 10 inside the case 20A thereafter is the same as in the above embodiment. Finally, as shown in FIG. 9B, the six bolts 70 are fastened to the six nuts 60 to join the first connection terminal portions 220A of the three first relay bus bars 200A to the first internal connection terminal portion 320 of the first external connection bus bar 300, and the second connection terminal portions 220B of the three second relay bus bars 200B to the second internal connection terminal portion 420 of the second external connection bus bar 400.
本変更例の構成によれば、第1接続端子部220Aと第1内部接続端子部320、および、第2接続端子部220Bと第2内部接続端子部420をボルト70とナット60で結合すると同時に、3つのコンデンサ素子ユニット40に第1外部接続バスバー300および第2外部接続バスバー400が連結されて組み上げられたコンデンサアセンブリ10を、ケース20内において、所定の位置に位置決めできる。
According to the configuration of this modified example, the first connection terminal portion 220A and the first internal connection terminal portion 320, and the second connection terminal portion 220B and the second internal connection terminal portion 420 are connected with bolts 70 and nuts 60, and at the same time, the capacitor assembly 10 assembled by connecting the first external connection bus bar 300 and the second external connection bus bar 400 to the three capacitor element units 40 can be positioned at a predetermined position within the case 20.
さらに、重ねられた第1接続端子部220Aおよび第1内部接続端子部320と、重ねられた第2接続端子部220Bおよび第2内部接続端子部420とが、載置部22によりケース20の内底面21a側から支えられる。また、第1接続端子部220Aおよび第2接続端子部220Bが、これらの貫通孔221に載置部22のナット60の段付部分61が嵌め込まれることにより、ケース20の内底面21aに沿う方向(前後左右方向)に固定される。これにより、ボルト70による第1外部接続バスバー300と3つの第1中継バスバー200Aとの接続作業および第2外部接続バスバー400と3つの第2中継バスバー200Bとの接続作業を容易に行うことが可能となる。
Furthermore, the stacked first connection terminal portion 220A and first internal connection terminal portion 320, and the stacked second connection terminal portion 220B and second internal connection terminal portion 420 are supported from the inner bottom surface 21a side of the case 20 by the mounting portion 22. Furthermore, the first connection terminal portion 220A and the second connection terminal portion 220B are fixed in a direction along the inner bottom surface 21a of the case 20 (front-rear and left-right directions) by fitting the stepped portion 61 of the nut 60 of the mounting portion 22 into these through holes 221. This makes it possible to easily perform the connection work between the first external connection bus bar 300 and the three first relay bus bars 200A and the connection work between the second external connection bus bar 400 and the three second relay bus bars 200B by the bolt 70.
<その他の変更例>
上記実施の形態では、ケース20に設けられた載置部22が、互い間に隙間を有する6つの載置台23に分けられている。しかしながら、たとえば、2つの載置台23の間に隙間が無くても液相状態の充填樹脂30がケース20内に良好に行き渡るような場合、載置部22が、6つの載置台23が隙間なく繋げられた1つの載置台により構成されてもよい。 <Other changes>
In the above embodiment, the mountingportion 22 provided on the case 20 is divided into six mounting tables 23 with gaps between them. However, for example, in a case where the filling resin 30 in a liquid phase state spreads well within the case 20 even if there is no gap between the two mounting tables 23, the mounting portion 22 may be configured as one mounting table in which the six mounting tables 23 are connected without any gaps.
上記実施の形態では、ケース20に設けられた載置部22が、互い間に隙間を有する6つの載置台23に分けられている。しかしながら、たとえば、2つの載置台23の間に隙間が無くても液相状態の充填樹脂30がケース20内に良好に行き渡るような場合、載置部22が、6つの載置台23が隙間なく繋げられた1つの載置台により構成されてもよい。 <Other changes>
In the above embodiment, the mounting
さらに、上記実施の形態では、フィルムコンデンサ1が、左右方向において、隣接する2つのコンデンサ素子100の対向する電極110同士が同極になるように構成されている。しかしながら、フィルムコンデンサ1が、左右方向において、隣接する2つのコンデンサ素子100の対向する電極110同士が異極になるように構成されてもよい。この場合、全てのコンデンサ素子ユニット40において、右側の中継バスバー200が第1中継バスバー200Aとなり、左側の中継バスバー200が第2中継バスバー200Bとなる。そして、第1外部接続バスバー300の第1内部接続端子部320は、3つの第1幅狭端子部321により構成され、これら3つの第1幅狭端子部321が、3つの第1接続端子部220Aに接続される。同様に、第2外部接続バスバー400の第2内部接続端子部420は、3つの第2幅狭端子部421により構成され、これら3つの第2幅狭端子部421が、3つの第2接続端子部220Bに接続される。
Furthermore, in the above embodiment, the film capacitor 1 is configured so that the opposing electrodes 110 of two adjacent capacitor elements 100 in the left-right direction have the same polarity. However, the film capacitor 1 may also be configured so that the opposing electrodes 110 of two adjacent capacitor elements 100 in the left-right direction have opposite polarities. In this case, in all capacitor element units 40, the right relay bus bar 200 becomes the first relay bus bar 200A, and the left relay bus bar 200 becomes the second relay bus bar 200B. The first internal connection terminal portion 320 of the first external connection bus bar 300 is configured by three first narrow terminal portions 321, and these three first narrow terminal portions 321 are connected to the three first connection terminal portions 220A. Similarly, the second internal connection terminal portion 420 of the second external connection bus bar 400 is composed of three second narrow terminal portions 421, and these three second narrow terminal portions 421 are connected to the three second connection terminal portions 220B.
さらに、上記実施の形態では、第1絶縁シート500が、第1外部接続バスバー300に下方から貼り付けられる。しかしながら、第1絶縁シート500が、第2外部接続バスバー400に上方から貼り付けられてもよい。即ち、第2外部接続バスバー400に、第1絶縁シート500と第2絶縁シート600が張り付けられてもよい。
Furthermore, in the above embodiment, the first insulating sheet 500 is attached to the first external connection bus bar 300 from below. However, the first insulating sheet 500 may be attached to the second external connection bus bar 400 from above. That is, the first insulating sheet 500 and the second insulating sheet 600 may be attached to the second external connection bus bar 400.
さらに、上記実施の形態では、フィルムコンデンサ1が、3つのコンデンサ素子ユニット40を含む。しかしながら、フィルムコンデンサ1に含まれるコンデンサ素子ユニット40の個数は、複数個であれば、2つあるいは4つ以上であってもよい。
Furthermore, in the above embodiment, the film capacitor 1 includes three capacitor element units 40. However, the number of capacitor element units 40 included in the film capacitor 1 may be two or four or more, as long as there are more than one.
さらに、上記実施の形態では、コンデンサ素子ユニット40が、3つのコンデンサ素子100を含む。しかしながら、コンデンサ素子ユニット40に含まれるコンデンサ素子100の個数は、複数個であれば、2つあるいは4つ以上であってもよい。
Furthermore, in the above embodiment, the capacitor element unit 40 includes three capacitor elements 100. However, the number of capacitor elements 100 included in the capacitor element unit 40 may be two or four or more, as long as there are more than one.
さらに、上記実施の形態では、第1外部接続バスバー300と第1中継バスバー200Aとの接続および第2外部接続バスバー400と第2中継バスバー200Bとの接続がボルト70とナット60により行われている。しかしながら、第1外部接続バスバー300と第1中継バスバー200Aとの接続および第2外部接続バスバー400と第2中継バスバー200Bとの接続が、他の接続方法、たとえば、半田付けや溶接、カシメ等により行われてもよい。
Furthermore, in the above embodiment, the connection between the first external connection busbar 300 and the first relay busbar 200A and the connection between the second external connection busbar 400 and the second relay busbar 200B are made by bolts 70 and nuts 60. However, the connection between the first external connection busbar 300 and the first relay busbar 200A and the connection between the second external connection busbar 400 and the second relay busbar 200B may be made by other connection methods, such as soldering, welding, crimping, etc.
さらに、上記実施の形態では、コンデンサ素子100は、誘電体フィルム上にアルミニウムを蒸着させた2枚の金属化フィルムを重ね、重ねた金属化フィルムを巻回または積層することで形成されたものであるが、これ以外にも、誘電体フィルムの両面にアルミニウムを蒸着させた金属化フィルムと絶縁フィルムとを重ね、これを巻回または積層することにより、これらコンデンサ素子100が形成されてもよい。
Furthermore, in the above embodiment, the capacitor element 100 is formed by stacking two metallized films with aluminum vapor-deposited on a dielectric film, and then rolling or laminating the stacked metallized films. However, these capacitor elements 100 may also be formed by stacking a metallized film with aluminum vapor-deposited on both sides of a dielectric film and an insulating film, and then rolling or laminating the stacked metallized films.
さらに、上記実施の形態では、本発明のコンデンサの一例として、フィルムコンデンサ1が挙げられた。しかしながら、本発明は、フィルムコンデンサ以外のコンデンサに適用することもできる。
Furthermore, in the above embodiment, a film capacitor 1 is given as an example of a capacitor of the present invention. However, the present invention can also be applied to capacitors other than film capacitors.
この他、本発明の実施の形態は、特許請求の範囲に示された技術的思想の範囲内において、適宜、種々の変更が可能である。
In addition, various modifications of the embodiment of the present invention are possible within the scope of the technical ideas set forth in the claims.
なお、上記実施の形態の説明において「上方」「下方」等の方向を示す用語は、構成部材の相対的な位置関係にのみ依存する相対的な方向を示すものであり、鉛直方向、水平方向等の絶対的な方向を示すものではない。
In the above description of the embodiment, terms indicating directions such as "upper" and "lower" indicate relative directions that depend only on the relative positional relationships of the components, and do not indicate absolute directions such as vertical or horizontal.
本発明は、各種電子機器、電気機器、産業機器、車両の電装等に使用されるコンデンサに有用である。
The present invention is useful for capacitors used in various electronic devices, electrical devices, industrial equipment, vehicle electrical equipment, etc.
1 フィルムコンデンサ(コンデンサ)
10 コンデンサアセンブリ
20 ケース
21a 内底面
22 載置部
23 載置台
24 第1穴部(穴部)
30 充填樹脂
40 コンデンサ素子ユニット
50 バスバーユニット
60 ナット
70 ボルト
100 コンデンサ素子
101 端面
102 周面
110 電極
200 中継バスバー
200A 第1中継バスバー
200B 第2中継バスバー
220 接続端子部
220A 第1接続端子部
220B 第2接続端子部
300 第1外部接続バスバー
320 第1内部接続端子部
330 第1外部接続端子部
340 第1重なり部
400 第2外部接続バスバー
420 第2内部接続端子部
430 第2外部接続端子部
440 第2重なり部 1. Film capacitor (capacitor)
REFERENCE SIGNSLIST 10 Capacitor assembly 20 Case 21a Inner bottom surface 22 Mounting portion 23 Mounting base 24 First hole portion (hole portion)
30 Fillingresin 40 Capacitor element unit 50 Bus bar unit 60 Nut 70 Bolt 100 Capacitor element 101 End face 102 Circumferential surface 110 Electrode 200 Relay bus bar 200A First relay bus bar 200B Second relay bus bar 220 Connection terminal portion 220A First connection terminal portion 220B Second connection terminal portion 300 First external connection bus bar 320 First internal connection terminal portion 330 First external connection terminal portion 340 First overlap portion 400 Second external connection bus bar 420 Second internal connection terminal portion 430 Second external connection terminal portion 440 Second overlap portion
10 コンデンサアセンブリ
20 ケース
21a 内底面
22 載置部
23 載置台
24 第1穴部(穴部)
30 充填樹脂
40 コンデンサ素子ユニット
50 バスバーユニット
60 ナット
70 ボルト
100 コンデンサ素子
101 端面
102 周面
110 電極
200 中継バスバー
200A 第1中継バスバー
200B 第2中継バスバー
220 接続端子部
220A 第1接続端子部
220B 第2接続端子部
300 第1外部接続バスバー
320 第1内部接続端子部
330 第1外部接続端子部
340 第1重なり部
400 第2外部接続バスバー
420 第2内部接続端子部
430 第2外部接続端子部
440 第2重なり部 1. Film capacitor (capacitor)
REFERENCE SIGNS
30 Filling
Claims (6)
- 複数のコンデンサ素子ユニットと、
前記複数のコンデンサ素子ユニットが収容されるケースと、
前記ケース内に充填される充填樹脂と、
第1外部接続バスバーと、
第2外部接続バスバーと、を備え、
前記複数のコンデンサ素子ユニットのそれぞれは、複数のコンデンサ素子と、第1中継バスバーと、第2中継バスバーと、を含み、
前記複数のコンデンサ素子は、前記ケースの内底面に平行な第1方向に沿って前記ケース内に配列され、
前記複数のコンデンサ素子のそれぞれは、電極がそれぞれ形成された一対の端面と周面とを有し、
前記第1中継バスバーは、前記複数のコンデンサ素子のそれぞれの前記一対の端面の一方の前記電極に接続され、
前記第2中継バスバーは、前記複数のコンデンサ素子のそれぞれの前記一対の端面の他方の前記電極に接続され、
前記複数のコンデンサ素子ユニットは、前記ケースの内底面に平行かつ前記第1方向に直交する第2方向に沿って前記ケース内に配列され、
前記複数のコンデンサ素子ユニットのうちの隣接する2つのコンデンサ素子ユニットの一方における前記複数のコンデンサ素子のそれぞれの前記電極が、前記隣接する2つのコンデンサ素子ユニットの他方における前記複数のコンデンサ素子のうちの対応するコンデンサ素子の前記電極に対向し、
前記第1外部接続バスバーは、外部端子に接続されるように構成された第1外部接続端子部と、第1重なり部とを有し、前記充填樹脂の内部において前記複数のコンデンサ素子ユニットのそれぞれの前記第1中継バスバーに接続され、
前記第1外部接続端子部は、前記充填樹脂から露出し、
前記第2外部接続バスバーは、外部端子に接続されるように構成された第2外部接続端子部と、第2重なり部とを有し、前記充填樹脂の内部において前記複数のコンデンサ素子ユニットのそれぞれの前記第2中継バスバーに接続され、
前記第2外部接続端子部は、前記充填樹脂から露出し、
前記第1重なり部および前記第2重なり部は、前記複数のコンデンサ素子ユニット内の前記第2方向に配列された複数のコンデンサ素子のそれぞれの周面と、前記第2方向に配列された前記複数のコンデンサ素子のうちの前記第2方向において隣接する2つのコンデンサ素子の間に生じる隙間とを覆うように、前記ケース内において前記ケースの内底面と直交する第3方向から見て互いに重なり合う、
ことを特徴とするコンデンサ。 A plurality of capacitor element units;
a case in which the plurality of capacitor element units are housed;
A filling resin filled in the case;
A first external connection bus bar;
a second external connection bus bar;
each of the plurality of capacitor element units includes a plurality of capacitor elements, a first relay bus bar, and a second relay bus bar;
The plurality of capacitor elements are arranged in the case along a first direction parallel to an inner bottom surface of the case,
Each of the plurality of capacitor elements has a pair of end faces and a peripheral surface on which electrodes are formed,
the first relay bus bar is connected to one of the electrodes on the pair of end faces of each of the plurality of capacitor elements,
the second relay bus bar is connected to the other electrode of the pair of end faces of each of the plurality of capacitor elements,
the plurality of capacitor element units are arranged in the case along a second direction that is parallel to an inner bottom surface of the case and perpendicular to the first direction,
the electrode of each of the plurality of capacitor elements in one of two adjacent capacitor element units among the plurality of capacitor element units faces the electrode of a corresponding capacitor element among the plurality of capacitor elements in the other of the two adjacent capacitor element units,
the first external connection bus bar has a first external connection terminal portion configured to be connected to an external terminal and a first overlapping portion, and is connected to the first relay bus bars of each of the plurality of capacitor element units inside the filling resin;
the first external connection terminal portion is exposed from the filling resin,
the second external connection bus bar has a second external connection terminal portion configured to be connected to an external terminal and a second overlapping portion, and is connected to the second relay bus bars of each of the plurality of capacitor element units inside the filling resin,
the second external connection terminal portion is exposed from the filling resin,
the first overlapping portion and the second overlapping portion overlap each other when viewed from a third direction perpendicular to an inner bottom surface of the case within the case so as to cover peripheral surfaces of each of the plurality of capacitor elements arranged in the second direction in the plurality of capacitor element units and a gap occurring between two capacitor elements adjacent to each other in the second direction among the plurality of capacitor elements arranged in the second direction;
A capacitor characterized by: - 請求項1に記載のコンデンサにおいて、
前記第1外部接続端子部および前記第2外部接続端子部は、前記ケースの前記第1方向における端部に配置され、
前記第1中継バスバーは、前記複数のコンデンサ素子のうちの前記第1方向において隣接する2つのコンデンサ素子の間に配置された第1接続端子部を有し、
前記第2中継バスバーは、前記複数のコンデンサ素子のうちの前記第1方向において前記隣接する2つのコンデンサ素子の間に配置された第2接続端子部を有し、
前記第1外部接続バスバーは、前記第1接続端子部が接続される第1内部接続端子部を有し、
前記第2外部接続バスバーは、前記第2接続端子部が接続される第2内部接続端子部を有する、
ことを特徴とするコンデンサ。 2. The capacitor according to claim 1,
the first external connection terminal portion and the second external connection terminal portion are disposed at ends of the case in the first direction,
the first relay bus bar has a first connection terminal portion disposed between two capacitor elements adjacent to each other in the first direction among the plurality of capacitor elements,
the second relay bus bar has a second connection terminal portion disposed between two of the plurality of capacitor elements adjacent to each other in the first direction,
the first external connection bus bar has a first internal connection terminal portion to which the first connection terminal portion is connected,
the second external connection bus bar has a second internal connection terminal portion to which the second connection terminal portion is connected;
A capacitor characterized by: - 請求項2に記載のコンデンサにおいて、
前記第1重なり部および前記第2重なり部に覆われた、前記複数のコンデンサ素子ユニット内の前記第2方向に配列された前記複数のコンデンサ素子は、前記第1接続端子部および前記第2接続端子部よりも前記第1外部接続端子部および前記第2外部接続端子部に近い位置に配置され、
前記第1重なり部および前記第2重なり部に覆われていない、前記複数のコンデンサ素子ユニット内の前記第2方向に配列された前記複数のコンデンサ素子以外のコンデンサ素子は、前記第1接続端子部および前記第2接続端子部よりも前記第1外部接続端子部および前記第2外部接続端子部から遠い位置に配置される、
ことを特徴とするコンデンサ。 3. The capacitor according to claim 2,
the plurality of capacitor elements arranged in the second direction in the plurality of capacitor element units and covered by the first overlapping portion and the second overlapping portion are disposed at positions closer to the first external connection terminal portion and the second external connection terminal portion than to the first connection terminal portion and the second connection terminal portion;
capacitor elements other than the plurality of capacitor elements arranged in the second direction in the plurality of capacitor element units and not covered by the first overlapping portion and the second overlapping portion are disposed at positions farther from the first external connection terminal portion and the second external connection terminal portion than the first connection terminal portion and the second connection terminal portion.
A capacitor characterized by: - 請求項1ないし3の何れか一項に記載のコンデンサにおいて、
前記第1中継バスバーは、第1接続端子部を有し、
前記第2中継バスバーは、第2接続端子部を有し、
前記第1外部接続バスバーは、前記第1接続端子部が接続される第1内部接続端子部を有し、
前記第2外部接続バスバーは、前記第2接続端子部が接続される第2内部接続端子部を有し、
前記第1接続端子部と前記第1内部接続端子部は、前記第3方向に重ねられてボルトとナットで挟み込まれることにより接触して固定され、
前記第2接続端子部と前記第2内部接続端子部は、前記第3方向に重ねられてボルトとナットで挟み込まれることにより接触して固定される、
ことを特徴とするコンデンサ。 The capacitor according to any one of claims 1 to 3,
the first relay bus bar has a first connection terminal portion,
The second relay bus bar has a second connection terminal portion,
the first external connection bus bar has a first internal connection terminal portion to which the first connection terminal portion is connected,
the second external connection bus bar has a second internal connection terminal portion to which the second connection terminal portion is connected,
the first connection terminal portion and the first internal connection terminal portion are stacked in the third direction and are sandwiched by a bolt and a nut, thereby being in contact with each other and fixed;
the second connection terminal portion and the second internal connection terminal portion are stacked in the third direction and are sandwiched by a bolt and a nut to be in contact with each other and fixed.
A capacitor characterized by: - 請求項4に記載のコンデンサにおいて、
前記ケースは、前記ケースの内底面から突出し、重ねられた前記第1接続端子部および前記第1内部接続端子部が載せられ、かつ、重ねられた前記第2接続端子部および前記第2内部接続端子部が載せられる載置部を含み、
前記第1内部接続端子部に重ねられる前記第1接続端子部には、前記ナットが前記ケースの内底面に向かって突出するように固定され、
前記第2内部接続端子部に重ねられる前記第2接続端子部には、前記ナットが前記ケースの内底面に向かって突出するように固定され、
前記載置部には、前記ナットが嵌まり込む穴部が設けられる、
ことを特徴とするコンデンサ。 5. The capacitor according to claim 4,
the case includes a mounting portion protruding from an inner bottom surface of the case, on which the overlapped first connection terminal portion and the overlapped first internal connection terminal portion are placed, and on which the overlapped second connection terminal portion and the overlapped second internal connection terminal portion are placed,
the nut is fixed to the first connection terminal portion overlapped with the first internal connection terminal portion so as to protrude toward an inner bottom surface of the case,
the nut is fixed to the second connection terminal portion overlapped with the second internal connection terminal portion so as to protrude toward an inner bottom surface of the case,
The mounting portion is provided with a hole into which the nut fits.
A capacitor characterized by: - 請求項4に記載のコンデンサにおいて、
前記ケースは、前記ケースの内底面から突出し、重ねられた前記第1接続端子部および前記第1内部接続端子部が載せられ、かつ、重ねられた前記第2接続端子部および前記第2内部接続端子部が載せられる載置部を含み、
前記載置部に前記ナットが固定される、
ことを特徴とするコンデンサ。 5. The capacitor according to claim 4,
the case includes a mounting portion protruding from an inner bottom surface of the case, on which the overlapped first connection terminal portion and the overlapped first internal connection terminal portion are placed, and on which the overlapped second connection terminal portion and the overlapped second internal connection terminal portion are placed,
The nut is fixed to the mounting portion.
A capacitor characterized by:
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005012940A (en) * | 2003-06-19 | 2005-01-13 | Toshiba Corp | Inverter device |
JP2005109309A (en) * | 2003-10-01 | 2005-04-21 | Matsushita Electric Ind Co Ltd | Metallized film capacitor |
JP2006319027A (en) * | 2005-05-11 | 2006-11-24 | Shizuki Electric Co Inc | Low-inductance capacitor |
JP2019033133A (en) * | 2017-08-04 | 2019-02-28 | 株式会社指月電機製作所 | Capacitor |
JP2021158715A (en) * | 2020-03-25 | 2021-10-07 | 株式会社デンソー | Capacitor and power conversion device provided therewith |
WO2021241320A1 (en) * | 2020-05-28 | 2021-12-02 | 株式会社村田製作所 | Capacitor module |
WO2022163278A1 (en) * | 2021-01-28 | 2022-08-04 | パナソニックIpマネジメント株式会社 | Capacitor |
-
2024
- 2024-01-17 WO PCT/JP2024/001145 patent/WO2024171701A1/en unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005012940A (en) * | 2003-06-19 | 2005-01-13 | Toshiba Corp | Inverter device |
JP2005109309A (en) * | 2003-10-01 | 2005-04-21 | Matsushita Electric Ind Co Ltd | Metallized film capacitor |
JP2006319027A (en) * | 2005-05-11 | 2006-11-24 | Shizuki Electric Co Inc | Low-inductance capacitor |
JP2019033133A (en) * | 2017-08-04 | 2019-02-28 | 株式会社指月電機製作所 | Capacitor |
JP2021158715A (en) * | 2020-03-25 | 2021-10-07 | 株式会社デンソー | Capacitor and power conversion device provided therewith |
WO2021241320A1 (en) * | 2020-05-28 | 2021-12-02 | 株式会社村田製作所 | Capacitor module |
WO2022163278A1 (en) * | 2021-01-28 | 2022-08-04 | パナソニックIpマネジメント株式会社 | Capacitor |
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