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EP1776709A1 - Composant inductif pour courants eleves et procede de production de ce composant - Google Patents

Composant inductif pour courants eleves et procede de production de ce composant

Info

Publication number
EP1776709A1
EP1776709A1 EP05774087A EP05774087A EP1776709A1 EP 1776709 A1 EP1776709 A1 EP 1776709A1 EP 05774087 A EP05774087 A EP 05774087A EP 05774087 A EP05774087 A EP 05774087A EP 1776709 A1 EP1776709 A1 EP 1776709A1
Authority
EP
European Patent Office
Prior art keywords
conductor
magnetic core
parts
component according
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05774087A
Other languages
German (de)
English (en)
Other versions
EP1776709B1 (fr
Inventor
Roman Brunel
Josef Feth
Gerd Riedel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TDK Electronics AG
Original Assignee
Epcos AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Epcos AG filed Critical Epcos AG
Priority to EP12153862.3A priority Critical patent/EP2458598B1/fr
Publication of EP1776709A1 publication Critical patent/EP1776709A1/fr
Application granted granted Critical
Publication of EP1776709B1 publication Critical patent/EP1776709B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/303—Clamping coils, windings or parts thereof together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2847—Sheets; Strips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2895—Windings disposed upon ring cores
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to an inductive component with a closed magnetic core, which is used in applications for high currents (eg in mains filters).
  • An inductive component is known from the publications DE 2850657 C2 and CH 290733.
  • An inductive device suitable for high currents has a current conductor with a large cross-section.
  • the current conductor may be formed as a flexible strand or a hard-to-bend solid conductor (eg busbar).
  • the present invention has for its object to provide a suitable for high currents inductive component having a high inductance and a small footprint.
  • the invention specifies an inductive component suitable for high currents with a closed magnetic core and a conductor which runs at least twice through the interior of the magnetic core and forms a winding of the inductive component.
  • the conductor comprises a plurality of firmly miteinan ⁇ connected, pre-bent or angled parts of a Solid conductor, which has a high bending strength.
  • Two interconnected conductor parts can, for. B. U-shaped, wherein the leg length of the U-piece may be under ⁇ different.
  • Two connected Stromlei ⁇ termaschine can also be each formed as an L-piece.
  • the connection of a U-piece with an L-piece is also provided.
  • the conductor parts can be bent twice or bent at least once, to form a U-piece twice, in one variant also more than twice.
  • Wesent ⁇ Lich is that a leg of the respective conductor part is pushed through the inner hole of the core.
  • the invention has the advantage that in the case of an inductive component designed for high currents, high inductance values can be achieved with a small constructional volume.
  • the number of turns is quadratic.
  • a solid conductor has the advantage of low ohmic losses compared to a flexible current conductor, which is composed of a plurality of current conductors.
  • the solid conductor has a high dimensional stability and therefore a high mechanical strength.
  • Conductor parts realized from a solid conductor have the advantage that they retain a given shape when connected to further current conductor parts.
  • a solid conductor in the case of the inductive component according to the invention is to be distinguished from a flexible wire, in particular from a wire which can be wound around a core.
  • the Stromtrag ⁇ strength of the solid conductor may, depending on the application z. 200A, 500A, 1000A or 2500A.
  • the hard-to-bend The solid conductor is preferably also distinguished from a flexible solid conductor, which has a current carrying capacity of less than 150 A.
  • the solid conductor preferably represents a busbar or busbar with a rectangular cross section.
  • the solid conductor can, for. B. a copper rail or an aluminum niur ⁇ schiene be.
  • the solid conductor can also consist of a different metal with good electrical conductivity.
  • the solid conductor can also be a flat conductor made of stamped metal, z. B. be sheet metal. It is advantageous if at least one of the fixedly interconnected conductor parts has two contact areas which are offset in height relative to one another.
  • the ladder parts can z.
  • the current conductor can be an electrical conductor without an insulating sheathing. In a further variant, the current conductor can have an insulating sheath.
  • the Isolierumhüllung can z. B. be formed by an insulating varnish or a plastic layer.
  • the conductor is preferably composed of several sub-conductors zu ⁇ sammenform, z. B. are mechanically firmly connected by screwing, soldering or welding. Such an embodiment of the conductor facilitates the installation of a winding with closed cores.
  • the junction between different parts of the conductor is preferably outside the interior of the magnetic core, for. B. above the plane in which the upper end face of the magnetic core is located, or below the plane in which the lower end face of the magnetic core is located.
  • the magnetic core may in one variant be designed as a homogeneous closed ring core with or without a gap.
  • the gap may be filled with a material having a different magnetic permeability from the material of the core.
  • the magnetic core of meh ⁇ reren parts, z. B. composed of two U or E parts.
  • the core can also be formed from an E-shaped and a rod-shaped core part, forming two closed magnetic circuits.
  • the gaps formed in this case can be filled with a material having a magnetic permeability different from material of the core.
  • an adhesive for connecting the core parts can be arranged together.
  • the core or the core part can, for. Example of iron, Metall ⁇ oxides, ceramics, plastics, ferrites or other weichmag ⁇ genetic materials or alloys thereof.
  • the core or the core part may be composed of iron sheets.
  • the magnetic core can be multi-part, wherein the core parts each have a closed magnetic circuit and are arranged one above the other along the core axis.
  • the pre-bent or angled parts of the current conductor can each pass through the inner hole of the magnetic core and then join outside of the inner hole of the core. be connected.
  • pre-bent conductors are assembled in a one-piece magnetic core.
  • the conductor is preferably fixed in the device so that it does not touch the core.
  • the arrangement of the core and the conductor or parts of the arrangement may be in the housing of the device z. B. be fixed by means of a potting. It is also possible to fasten the core and the current conductor to the housing independently of each other.
  • the current conductor preferably forms a winding which is wound around the magnetic core.
  • Each turn of the conductor is assigned its own winding level.
  • a part of the current conductor can be angled so that the change from one winding plane to the next level takes place.
  • the transition to the next winding level can also be achieved by angled connecting pieces between the parts of the conductor.
  • the invention can be used, for example, as a current-compensated choke in a line filter suitable for two, three or> 3 current phases.
  • each of the windings is formed substantially like the first current conductor described above.
  • the opening of the U-piece faces the first end face of the core.
  • the opening of the U-piece preferably has the second end face of the core.
  • the legs of the two U-pieces have a Studentslap ⁇ pungs Scheme and are firmly connected to each other in this area.
  • the U-pieces are pre-bent in a variant. In another variant, they are ver ⁇ available as stamped flat parts.
  • FIG. 1 shows the cross section of an inductive component with ei ⁇ nem housing
  • Figure 2 is a perspective view of a network filter with an inductive component according to the invention
  • FIGS 3A to 3F process steps in the assembly of the conductor to the magnetic core
  • Figure 4 is a perspective view of an inductive Bauele ⁇ ment with a winding which is composed of L-shaped Flachleitertei ⁇ len.
  • the arrangement of the magnetic core 3 and the current conductors 1, 2 is arranged in a Ge housing 4 made of sheet metal.
  • the first conductor 1 is composed of two pre-bent parts 11 and 12.
  • the second current conductor 2 is likewise composed of two pre-bent parts 21 and 22.
  • the parts of the respective Stromlei ⁇ age are connected to each other by means of fasteners 71 and 72 firmly together, z. B. screwed.
  • the first part 11 of the first conductor 1 has two openings for receiving fastening elements 71, an opening IIb visible in FIG. 2 in the region of the first terminal 111 of the first conductor 1 and a further opening for receiving a fastening element 73.
  • the Befest Trents ⁇ element 73 is used for attachment of a not dargestell ⁇ here th line piece, which produces the electrical connection to the board 8 here.
  • the first part 11 of the first current conductor 1 can have only one opening for receiving fastening elements or more than two such openings.
  • the second part 12 of the first conductor 1 has two openings for receiving fastening elements 71, an opening 12b visible in FIG. 2 in the region of the second connection 112 of the first conductor 1 and a further opening 77 for receiving a fastening element 76 (see Fig. 2).
  • the fastening element 76 serves for fastening a line piece, not shown here, which produces the electrical connection to the capacitor 6 in FIG. 2.
  • the first conductor 1 extends twice through the inner hole 31 of the closed magnetic core 3.
  • the second conductor 2 also passes twice through the inner hole 31 of the magnetic core 3.
  • the second conductor 2 is similar in structure to the first conductor. 1
  • the parts 11, 12 of the conductor 1 are constructed such that they can be easily inserted through the magnet core 3.
  • the decomposition of the conductor 1 in the Sectionstü ⁇ bridge 11, 12 may, for. For example, as shown in FIG. 3A, such that the distance a between the legs of the U-shaped part 11 is not smaller than the wall thickness b of the magnetic core.
  • the parts 11, 12 are mechanically connected to one another and fixed relative to the core such that their connection point lies above the plane in which the upper end face of the magnet core 3 is arranged.
  • the arrangement can be designed to save space, in particular in the direction transverse to the axis of the magnetic core 3. It is advantageous if the connection point between the sections 11, 12 faces away from the inner hole 31 of the magnetic core 3.
  • the conductor 1 can be broken down into more than two sections depending on the predetermined number of turns. It It is advantageous to design the sections with U-shaped areas, wherein the (preferably shorter) legs of different U-sections partly overlap one another.
  • the core can be inserted between the legs of a U-section.
  • the sections 11, 12 of the first conductor 1 and the sections 21, 22 of the second conductor 2 are preferably angled toward the outside such that the distance between the first component terminals 111 and 211 is smaller than the second component. Terminals 112 and 212 is the same.
  • only parts are used, each of which forms less than a whole turn around the core. They preferably form a half or three quarters turn.
  • the first conductor 1 is fixed by means of the insulating inserts 51, 53 in the housing 4 and is electrically insulated therefrom.
  • the second conductor 2 is fixed by means of the insulating inserts 52, 54 in the housing 4 and electrically isolated from this.
  • the inserts 51 to 54 are fastened in the housing by means of the fastening elements 74, 75.
  • the magnet core 3 is a toroidal core with an inner hole 31.
  • the magnet core 3 is here in three parts, wherein the core parts each have a closed magnetic circuit and are arranged one above the other along the core axis.
  • the magnetic core 3 is fixed in the housing 4 such that it does not touch the turns of the current conductors 1, 2.
  • the winding can touch the core if the core is electrically insulated from an electrically insulating material or the winding of core.
  • the housing 4 surrounds the magnetic core 3, the first Strom ⁇ conductor 1 to its terminals 111, 112 and the second conductor 2 to its terminals 211, 212.
  • the housing 4 has openings 41 for receiving further fastening elements on, with which the entire component z. B. can be mounted on a panel or in a sheet metal cabinet.
  • the openings 41 can also be rivet holes for a housing cover.
  • FIG. 2 shows the perspective view of a network filter with an inductive component according to the invention.
  • the housing 4 in addition to the inductive component (elements 1, 2, 3) e- lektrisch with this connected capacitors 6 and 81 to 83 are arranged.
  • the capacitors 81 to 83 are mounted on a Lei ⁇ terplatte 8.
  • the circuit board 8 is electrically connected to the housing 4 by means of a copper strip 84 low inductively.
  • Figures 3A to 3F show process steps in the assembly of the conductor to the magnetic core.
  • the closed magnetic core 3 and the Detail ⁇ pieces 11, 12 of the first conductor 1 and the sections 21, 22 of the second conductor 2 are provided.
  • the Rail ⁇ pieces 11, 12, 21, 22 of the first 1 and the second 2 Strom ⁇ conductor are U-shaped with an angled longer Schen ⁇ cle.
  • the first part 11 of the first conductor 1 and the first part 21 of the second conductor 2 is pushed through from below over the wall of the magnetic core 3 (FIGS. 3A, 3B, 3E) and aligned so that the distance to the magnet core 3 is maintained, and z. B. by means of the inserts 51, 52 shown in FIG. 2, z. B. by means of bushings, not shown in the housing of the component fixed (Fig. 3C, 3F).
  • the second part 12 of the first conductor 1 and the second part 22 of the second conductor 2 is inserted from above into the inner hole 31 of the magnet core 3 (FIGS. 3B, 3E) and aligned relative to the core and the sections 11, 21 (FIG 3C, 3F), that the openings IIa, 12a of the sections 11, 12 coincide with each other and the distance to the magnetic core 3 is maintained, and z. B. by means of the inserts 53, 54 shown in FIG. 2, z. B. by means of bushings, fixed in the housing of the device (Fig. 3D, 3F).
  • the section 11 is z. B. firmly connected by means of fastening elements with the section 12.
  • the section 21 is z. B. by Befest Trents ⁇ elements firmly connected to the portion 22.
  • the joining of the sections together can be done before fixing these sections in the housing.
  • the joining of the sections with each other can also be done after fixing these sections in the housing.
  • the magnetic core can be fixed in a variant prior to the passage of the sections 11, 12, 21, 22 in the housing.
  • the magnetic core can only be fixed in the housing after aligning and fixing the sections 11, 12, 21, 22.
  • the first current conductor 1 is first mounted. After mounting the first conductor 1, the second conductor 2 is mounted in the same manner.
  • first sections 11, 21 can also be inserted or mounted in a single step, the second sections 12, 22 being inserted and mounted in a further step.
  • the order of the method steps can be chosen in principle belie ⁇ big.
  • FIG. 4 shows an inductive component with a winding, which is composed of firmly interconnected L-shaped flat conductor parts 11 ', 12', 13 '.
  • the first flat conductor parts 11 'and 13' are bent so that they each have an obliquely extending portion IIb, 13b.
  • Section IIb or 13b connects the sections IIa and 11c or 13a and 13c arranged in different winding planes. With the oblique portion of the L-piece or by mounting with a height offset (the connecting areas) so succeeds the transition between two winding levels.
  • connection region 101 101, 102, 103, 104.
  • the connecting regions 101 and 103, 102 and 103, 102 and 104 of two flat conductor parts are arranged along each of a diagonal.
  • the flat conductor parts are firmly connected to each other in the connection areas, z. B. welded, bolted or brazed.
  • the first flat conductor parts 11 'and 13' are connected to each other by means of a second flat conductor part 12 '.
  • the second flat conductor part 12 ' has no kink and is arranged in a winding plane. In principle, however, it can also be folded like the parts 11 ', 13'.
  • the conductor part 11 ' is fixedly connected to the connection piece 111 and the conductor part 13' to the connection piece 112.
  • the connecting pieces preferably each have at least one opening for receiving a fastening element.
  • the L-pieces in Fig. 4 can be replaced in a variant by U-shaped flat conductor parts, wherein z. B. the ers te U-part is bent so that its connecting piece is inclined.
  • the second U-part can lie in a winding plane or be bent.
  • the dacasstel ⁇ len of two U-pieces preferably have to end faces of the core.
  • the magnetic core in Figure 4 is a closed core composed of two interconnected U-pieces.
  • the magnetic core can also be integral.
  • the invention is not limited to the example presented or certain materials. Further developments of the invention eg. As regards the configuration of the connection point between different parts of the conductor or with respect to the attachment of parts of the arrangement of the core and the conductor are provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un composant inductif adapté à des courants élevés, ce composant comprenant un noyau magnétique (3) fermé et un conducteur (1) difficilement cintrable qui passe au moins deux fois à travers l'intérieur du noyau magnétique (3). Ce conducteur (1) est composé de préférence de plusieurs parties (11, 12) qui peuvent être chacune facilement introduites à travers le trou intérieur du noyau magnétique (3). Après leur introduction, les parties (11, 12) du conducteur sont assemblées mécaniquement de manière fixe, le point de jonction se trouvant à l'extérieur de l'espace intérieur du noyau magnétique (3). Ce composant inductif adapté à des courants élevés présente l'avantage qu'il permet d'atteindre des valeurs d'inductance élevées tout en présentant un volume réduit.
EP05774087.0A 2004-08-12 2005-08-11 Composant inductif pour courants eleves et procede de production de ce composant Active EP1776709B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12153862.3A EP2458598B1 (fr) 2004-08-12 2005-08-11 Composant inductif pour hauts courants et son procédé de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004039230A DE102004039230A1 (de) 2004-08-12 2004-08-12 Induktives Bauelement für hohe Ströme und Verfahren zu dessen Herstellung
PCT/DE2005/001422 WO2006015589A1 (fr) 2004-08-12 2005-08-11 Composant inductif pour courants eleves et procede de production de ce composant

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP12153862.3A Division-Into EP2458598B1 (fr) 2004-08-12 2005-08-11 Composant inductif pour hauts courants et son procédé de fabrication
EP12153862.3A Division EP2458598B1 (fr) 2004-08-12 2005-08-11 Composant inductif pour hauts courants et son procédé de fabrication

Publications (2)

Publication Number Publication Date
EP1776709A1 true EP1776709A1 (fr) 2007-04-25
EP1776709B1 EP1776709B1 (fr) 2014-06-25

Family

ID=35134834

Family Applications (2)

Application Number Title Priority Date Filing Date
EP05774087.0A Active EP1776709B1 (fr) 2004-08-12 2005-08-11 Composant inductif pour courants eleves et procede de production de ce composant
EP12153862.3A Active EP2458598B1 (fr) 2004-08-12 2005-08-11 Composant inductif pour hauts courants et son procédé de fabrication

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP12153862.3A Active EP2458598B1 (fr) 2004-08-12 2005-08-11 Composant inductif pour hauts courants et son procédé de fabrication

Country Status (6)

Country Link
US (1) US8063728B2 (fr)
EP (2) EP1776709B1 (fr)
JP (1) JP2008509568A (fr)
CN (1) CN1993782B (fr)
DE (1) DE102004039230A1 (fr)
WO (1) WO2006015589A1 (fr)

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FR2996350B1 (fr) * 2012-10-03 2015-12-04 Technoboost Inductance de puissance et circuit electrique comportant une telle inductance
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JP2014120518A (ja) * 2012-12-13 2014-06-30 Nec Tokin Corp インダクタンス素子及びノイズフィルタ
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JP2008509568A (ja) 2008-03-27
US8063728B2 (en) 2011-11-22
EP1776709B1 (fr) 2014-06-25
DE102004039230A1 (de) 2006-02-23
EP2458598A1 (fr) 2012-05-30
WO2006015589A1 (fr) 2006-02-16
CN1993782A (zh) 2007-07-04
US20080012675A1 (en) 2008-01-17
EP2458598B1 (fr) 2017-09-27
CN1993782B (zh) 2011-05-11

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