WO2009124574A1 - Verfahren zur herstellung eines transformatorkerns, sowie einem transformatorkern - Google Patents
Verfahren zur herstellung eines transformatorkerns, sowie einem transformatorkern Download PDFInfo
- Publication number
- WO2009124574A1 WO2009124574A1 PCT/EP2008/003074 EP2008003074W WO2009124574A1 WO 2009124574 A1 WO2009124574 A1 WO 2009124574A1 EP 2008003074 W EP2008003074 W EP 2008003074W WO 2009124574 A1 WO2009124574 A1 WO 2009124574A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- core
- sheet
- core sheet
- angle
- edge
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 75
- 229910052751 metal Inorganic materials 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000003475 lamination Methods 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 238000013517 stratification Methods 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/02—Cores, Yokes, or armatures made from sheets
-
- 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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/263—Fastening parts of the core together
-
- 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
Definitions
- the invention relates to a method for producing a transformer core, wherein the transformer core of core sheets is assembled in layers and at least one core sheet is formed from at least two sheet metal segments. An end portion of the first sheet segment has a straight
- the straight cutting edge of the first sheet segment forms a straight abutting edge with a corresponding straight cut edge of an end portion of the second sheet segment and the straight abutment edge has an angle relative to the longitudinal direction of the end portion of one of the sheet metal segments of the first core sheet.
- the invention relates to a transformer core which is composed of laminations in layers, wherein at least one core sheet is formed from two sheet metal segments.
- transformer cores made of core sheets are assembled in layers in Hochnapsstransformatorbau.
- the use of the core sheets creates a preferred magnetic direction along the sheets and reduces the magnetic flux induced eddy currents within the transformer core.
- the core sheets are usually composed of sheet metal segments, in particular the sheet metal forms MI, EI, II or UI are used.
- the composite sheet metal segments then form the respective core sheet, which is then assembled in layers to form a transformer core.
- the layering of the core sheets takes place in such a manner that the sheet ends (the so-called core tips) are offset relative to each other in the sheet metal ends of the core segments to each other. This can take the form of a so-called alternating layering or a so-called step-lap
- sectional shapes of the sheet metal segments are preferably used which form abutting edges due to form-fitting composite cut edges, wherein the abutting edges extend at an angle of 45 ° with respect to the longitudinal direction of the end region of one of the sheet metal segments.
- tips on the sheet ends of the sheets of the outer leg or the yokes on or on the inside of the core window are by the staggering of the core sheets Aussparrungen.
- EP 1 655 747 A2 describes a sheet metal section for a layered core of a transformer.
- a first sheet metal part has an E-shaped basic shape, which forms a second yoke of the core sheet with a second I-shaped sheet metal part.
- DE 101 32 719 A1 describes a method for producing electrical core sheet assemblies.
- provided with a corrosion layer electrical core sheets are cut to the particular desired shape, wherein the side surfaces or the
- Cut edges of the cut core sheets are first coated with a corrosion protection layer and then assembled.
- WO 2006/105024 A2 describes a transformer with a layered core and a cross-shaped leg.
- the transformer core is composed of the respectively stratified legs and yokes of the transformer core, the ends of the respective legs and yokes being stacked in a respectively corresponding manner.
- WO 00/49628 describes a layered transformer core with an alternating sequence of S-shaped formations.
- the object of the present invention is to provide a transformer core which can be produced quickly and easily and has improved corrosion protection properties.
- a second core sheet consists of at least two sheet segments of straight edges corresponding to the end portions, wherein the composite straight cut edges form a second straight abutment edge and the second straight abutment edge of the second core sheet one of the angle of the first straight abutment edge first core sheet deviating angle to the longitudinal direction of the end portion of one of the sheet metal segments has.
- the core sheets with differing angles O 1 , ⁇ 2 of the abutting edges are laminated to a transformer core in an alternating sequence of the core sheets relative to the longitudinal regions of the end region of the respectively assembled sheet metal segments of the respective core sheets. It is advantageous if the proportion of the core sheets covered with an angle .phi..sub.i of 45 ° of the abutting edge on the proportion of the other core sheets with a different angle ⁇ 2, for example of 90 °, the abutting edges occupies the highest percentage, wherein three different Tin lengths are used. Ideally, a sequence of three core laminations begins and ends with a core sheet, each having an angle .phi.i of 45.degree.
- the respective abutting edges of the respective further core sheets with respect to the abutting edge of the first core sheet are advantageously arranged next to each other.
- the respective abutting edges of the respective further core sheets are offset with respect to their position of the center of the respective abutting edges in the longitudinal direction of the respective end region of one of the sheet metal segments with respect to the abutting edge of the first core sheet.
- the angle Oi of the first abutting edge of the first core sheet is about 45 degrees with respect to the longitudinal direction of the end portion of one of the core segments of the first core sheet, and the second core sheet has the abutting edge at an angle ⁇ 2 of 0 degrees with respect to the longitudinal direction of the end portion of one of the core sheets of the core sheet second core sheet on and the first and the second core sheet are arranged directly next to each other.
- the angle Oi of the first abutting edge of the first core sheet is about 45 degrees with respect to the longitudinal direction of the first core sheet End portion of one of the core segments of the first core sheet and the second core sheet has the abutting edge at an angle ⁇ 2 of 90 degrees with respect to the longitudinal direction of the end portion of one of the core sheets of the second core sheet, and the first and second core sheets are disposed immediately adjacent to each other.
- the first core sheet advantageously consists of at least three core sheet segments, between the first core sheet segment and the second core sheet segment form-fitting an abutment edge is formed at an angle Oi of 45 degrees and the composite first and second core sheet segment formally a straight abutting edge with the third Kernblechseg- ment at an angle ⁇ 2 of 0 degrees in the longitudinal direction of the end portion of the third core sheet segment.
- This combination of the sheet metal segments to a core sheet is particularly suitable as a structure of the middle yoke of the respective core sheet.
- the second core sheet consisting of two core sheet segments form-fitting forms a straight abutment edge at an angle Oi of 45 degrees with respect to the longitudinal direction of the end portion of the second core sheet segment.
- a second core sheet consists of at least two sheet segments having straight cut edges corresponding to the end portions and the assembled straight cut edges form a straight abutting edge, the abutting edge of the second core sheet being an angle ⁇ i of the abutting edge of the first core sheet deviating angle ⁇ 2 relative to the longitudinal direction of the end portion of one of the sheet metal segments of the second core sheet has.
- the angle ⁇ x of the abutting edge of the first core sheet is about 45 degrees with respect to the longitudinal direction of the end portion of one of the core segments of the first core sheet and the second core sheet has a straight abutment edge at an angle ⁇ 2 of 0 or 90 degrees with respect to the longitudinal direction of the end portion one of the core segments of the second core sheet and the second core sheet is disposed immediately adjacent to the first core sheet.
- first core sheet having an angle ⁇ i of the abutting edge of about 0 degrees and a second core sheet having a straight abutment edge of the second core sheet with an angle ⁇ 2 of about 90 degrees and a third core sheet with an angle ⁇ 3 of the abutting edge of the third core sheet of about 45 degrees are arranged in an alternating sequence.
- the transformer core consists of the first core sheet with at least three core sheet segments, wherein a straight abutment edge is formed in a form-locking manner at an angle ⁇ i of 45 degrees between the first core sheet segment and the second core sheet segment, and the assembled first and second core sheet segments form-fittingly have a straight abutting edge with the third core sheet segment at an angle ⁇ 2 of 0 degrees in the longitudinal direction of the end region of the third core sheet segment.
- the sheet metal segments consist of cold-rolled grain-oriented iron sheets.
- the straight cut edges of the end region of the first and second sheet metal segments are advantageously stepped.
- Fig. 1 section of the core sheet connecting the upper yoke with the left leg with an angle ⁇ i of 45 degrees of the abutting edge;
- Fig. 2 section of the core sheet connecting the upper yoke with the left leg with an angle ⁇ 2 of 90 degrees of the abutting edge;
- Fig. 3 section of the core sheet connecting the upper yoke with the left leg with an angle ⁇ i of 0 degrees of the abutting edge;
- Fig. 6 section of the core sheet as a connection of the upper yoke with the left leg with a stepped abutting edge
- FIG. 7 shows a section of the transformer core with an alternating sequence of core laminations with a respective angle of the abutting edge of the first two core laminations of .phi.i of 45 degrees and a respective angle of the abutting edge of a further core sheet of .phi..sub. ⁇ of 0 degrees or 90 degrees;
- FIG. 8 shows a section of the transformer core with an alternating sequence of core laminations with a respective angle of the abutting edge of ⁇ i of 60 degrees, ⁇ 2 of 45 degrees;
- FIG. 9 shows a section of the transformer core with an alternating sequence of core laminations with a respective angle of the abutting edge of ⁇ i of 90 degrees, ⁇ 2 of 0 degrees and ⁇ i of 45 degrees;
- Fig. 11 section of the transformer core with an alternating sequence of core sheets with a respective angle of the first abutting edge of ⁇ i of 45 degrees, ⁇ 2 of 90 degrees of the first core sheet, and a respective angle of the first edge of O 1 of 90 degrees of the second core sheet;
- Fig. 12 section of the transformer core with respect to the left and the middle leg to the upper yoke with an alternating sequence of core sheets.
- FIG. 1 shows a section of a core sheet 10, wherein the cutout represents the upper left corner as the connection of the upper yoke to the left leg.
- a first sheet metal segment 11 of the core sheet 10 forms part of the upper yoke and a second sheet metal segment 12 of the core sheet 10 forms the left leg of the transformer core 1 (not shown).
- the sheet metal segments 11, 12 each have a cut edge, which form-fitting forms a straight abutment edge 2 of the core sheet 10.
- the angle O 1 is 45 ° relative to the longitudinal direction of the first sheet metal segment 11. This angle .phi..sub.i is represented by corresponding dashed lines in FIG. Since FIG.
- FIG. 2 again shows a section of the core sheet as a connection of the upper yoke with the left leg, wherein now between the first sheet segment 11 as part of upper yoke and the second sheet metal segment 12 as part of the left leg of the transformer core, the straight abutment edge 2 at an angle ⁇ 2 of 90 °.
- an angle ⁇ i of the straight abutting edge 2 between the first sheet-metal segment 11 and the second sheet-metal segment 12 of the core sheet 10 is shown at 0 °.
- Sheet metal segment 11 and the second sheet metal segment 12 of the core sheet 10 a straight abutment edge 2 located at an angle of 30 °.
- FIG. 6 shows a stepped abutting edge between the first sheet-metal segment 11 and the second sheet-metal segment 12 of the core sheet 10.
- FIG. 7 shows a section of the transformer core 1. Shown are the core sheets 10, 110, 210, 310, 410, 510, 610, 710 in the upper left corner of the transformer core 1, so that only parts of the upper yoke and the left leg of the transformer core 1 are visible.
- the core sheets 10, 110, 210, 310, 410, 510, 610, 710 are layered in an alternating sequence such that in each case a core sheet 10 has an abutment edge 2 at an angle of ⁇ i of 45 ° and an immediately adjacent core sheet 110 an angle ⁇ 2 of the straight abutting edge 102 also 45 °.
- a core sheet 510 with an angle ⁇ 6 of 0 °.
- FIG. 8 shows a section of the upper left corner of a transformer core 1 as a connection between the upper yoke and the left leg.
- core laminations 10, 210 alternate at an angle ⁇ i, ⁇ 3 of 60 ° of the respective straight edge 2, 202 in comparison to core laminations 110, 310 with an angle ⁇ 2 , ⁇ 4 of the straight edge 2, 102, 302 from 45 ° down.
- FIG. 9 shows a further combination of different angles of the straight abutment edge 2 relative to a longitudinal direction of one of the sheet-metal segments 11 (not shown). net).
- the upper left corner of a transformer core 1 is shown as staggered lamination.
- core laminations 10, 110, 210, 310, 410, 510 alternate with angles ⁇ lf ⁇ 4 of 90 ° with core laminations 10 and 310, of 0 ° with core laminations 110, 410 with angles ⁇ 2 , ⁇ 5 of 0 ° with core sheets 210, 510 with an angle ⁇ 3 / ⁇ 6 of the straight abutment edge 2 of 45 °.
- FIG. 7, FIG. 8 and FIG. 9 show the core sheets 10, 110 for better visibility.
- a transformer core 1 produced according to the method according to the invention can therefore either have a round shape indicated round shape or define a completely rectangular structure of the transformer core 1 due to the length ratios of the core sheets 10, 110, 210, 310, 410, 510, 610.
- the edges of the transformer core 1 therefore become almost flat, so that corrosion susceptibility due to existing gaps would no longer be present.
- FIG. 10 shows a section of the core sheet 10 as connection of the upper yoke to the middle leg of a three-phase transformer core.
- a first sheet-metal segment 11 of the core sheet 10 has a straight cutting edge which has a first straight abutting edge 2a of the core sheet 10 in a form-fitting manner with a corresponding cutting edge of a second core sheet 12.
- the so folded sheets of the segments 11, 12 partially define a cutting edge, the form-fitting with a corresponding cutting edge of another sheet segment 13 defines a straight abutment edge at an angle of 90 ° with respect to the longitudinal direction of the first sheet segment 11.
- the composite sheet metal segments 11, 12, 13 therefore have the two abutting edges 2, 2a. Other angles of the straight abutting edges 2, 2a are easily implementable according to the present invention.
- FIG. 11 shows a detail of a transformer core 1 according to the invention, in which a great variety of core laminations 10, 110, 210, 310 are combined.
- the detail of the transformer core 1 shown in FIG. 11 again shows the cross-shaped part of the upper yoke in connection with the middle limb of a multiphase transformer core 1.
- a first conception of a Core sheet 10 from a continuous first sheet metal segment 11 (not shown) as a continuous upper yoke with a perpendicular thereto adjacent middle leg as the second core sheet 12th
- the first core sheet 10 designed in this way is layered next to a second core sheet 110, wherein the second core sheet 110 has sheet metal segments 11, 12, 13 (not shown), the two abutting edges 2, 2a at an angle ⁇ i of 45 ° and ⁇ 2 of 90 °.
- the fourth core sheet 310 is mirrored with respect to the concept of the second core sheet 110.
- Transformer core 1 with partial center leg, left outer leg and upper yoke visible. Shown in FIG. 12 is the layering of the transformer core 1 with respect to the different core sheets 10, 110, 210, 310, 410, 510.
- the first core sheet 10 has at least three sheet metal segments 11, 12, 13, wherein the Impinging edge 2, 2a of the upper yoke has two angles of + 45 ° and the straight abutment edge 2a between the first and the second sheet metal segment 11, 12, an angle of 45 °.
- next core sheet 110 (not shown) has an angle of 45 °
- the abutting edge 202, 202a and 202b of the third core sheet 210 extend at an angle of 90 ° and 45 °, respectively.
- the sheet segments 11, 12 are connected between the upper yoke and the left leg via a 90 ° impact edge 202a.
- a part of the upper yoke is composed as a first sheet segment 11 at an angle of 90 ° with the third sheet metal segment 13 as part of the middle leg also form-fitting at an angle of 90 °.
- the third sheet metal segment 13 additionally has a cutting edge at an angle of 45 °, which form-fittingly forms a third abutting edge 202b with a corresponding cutting edge of a fourth sheet metal segment (not shown).
- the further abutting edges in the illustrated example 302, 302a, 402, 402a, 502 and 502a of the fourth to sixth core laminations 310, 410, 510 extend at an angle of 45 ° in each case. Furthermore, a minimal offset of the identically extending abutting edges 102, 302, 402, 502 and 102, 302a, 402a and 502a is visible in the illustration of FIG. 12, so that the method according to the invention can be used in the coating of conventional transformers and the disturbing influences of corresponding core tips is avoided.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2008/003074 WO2009124574A1 (de) | 2008-04-10 | 2008-04-10 | Verfahren zur herstellung eines transformatorkerns, sowie einem transformatorkern |
BRPI0822583A BRPI0822583B8 (pt) | 2008-04-10 | 2008-04-10 | Núcleo de transformador que consiste em chapas de núcleo em camadas |
CA2721012A CA2721012C (en) | 2008-04-10 | 2008-04-10 | Method for producing a transformer core and a transformer core |
EP08735299A EP2260494B1 (de) | 2008-04-10 | 2008-04-10 | Transformatorkern |
US12/937,477 US8212645B2 (en) | 2008-04-10 | 2008-04-10 | Method for producing a transformer core and a transformer core |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2008/003074 WO2009124574A1 (de) | 2008-04-10 | 2008-04-10 | Verfahren zur herstellung eines transformatorkerns, sowie einem transformatorkern |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009124574A1 true WO2009124574A1 (de) | 2009-10-15 |
Family
ID=40122311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/003074 WO2009124574A1 (de) | 2008-04-10 | 2008-04-10 | Verfahren zur herstellung eines transformatorkerns, sowie einem transformatorkern |
Country Status (5)
Country | Link |
---|---|
US (1) | US8212645B2 (de) |
EP (1) | EP2260494B1 (de) |
BR (1) | BRPI0822583B8 (de) |
CA (1) | CA2721012C (de) |
WO (1) | WO2009124574A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008049432B4 (de) * | 2008-09-25 | 2018-02-08 | Siemens Aktiengesellschaft | Leistungsschalter und Stromwandler für einen Leistungsschalter |
WO2019204963A1 (en) | 2018-04-23 | 2019-10-31 | Siemens Aktiengesellschaft | Molded tap changer assemblies and methods for dry-type transformers |
EP3769324B1 (de) | 2018-04-23 | 2023-08-30 | Siemens Energy Global GmbH & Co. KG | Transformatorkerne und montageverfahren dafür mit hohem wirkungsgrad und hohem korrosionsschutz |
DE102018112245A1 (de) | 2018-05-22 | 2019-11-28 | Borgwarner Ludwigsburg Gmbh | Verfahren zur Montage eines Magnetkerns für einen Transformator sowie Magnetkern für einen Transformator |
Citations (9)
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---|---|---|---|---|
CH257843A (de) * | 1941-01-29 | 1948-10-31 | Westinghouse Electric Corp | Elektrischer Apparat mit einem Magnetkern. |
DE1489773A1 (de) * | 1965-09-24 | 1969-09-04 | Continental Elektro Ind Ag | Geschichteter Eisenkern fuer elektrische Induktionsapparate |
DE1613654A1 (de) * | 1967-03-10 | 1970-05-14 | Funken Josef Dipl Ing | Eisenkern fuer elektrische Induktionsapparate |
US3743991A (en) * | 1971-08-18 | 1973-07-03 | Westinghouse Electric Corp | Magnetic core structures |
US6070317A (en) * | 1996-05-08 | 2000-06-06 | Espey Mfg. & Electronics Corp. | Quiet magnetic structures |
WO2000049628A1 (en) | 1999-02-17 | 2000-08-24 | Abb Power T & D Company Inc. | Stacked magnetic transformer core with center leg s-joints |
DE10132719A1 (de) | 2001-07-05 | 2003-01-16 | Abb T & D Tech Ltd | Verfahren zur Fertigung elektrischer Kernblech-Baugruppen |
EP1655747A2 (de) | 2004-11-05 | 2006-05-10 | era GmbH & Co. KG | Blechschnitt für einen geschichteten Kern eines Transformators |
WO2006105024A2 (en) | 2005-03-30 | 2006-10-05 | Abb Technology Ag | A transformer having a stacked core with a cruciform leg and a method of making the same |
Family Cites Families (11)
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US2300964A (en) * | 1941-01-29 | 1942-11-03 | Westinghouse Electric & Mfg Co | Magnetic core structure |
US2898565A (en) * | 1954-07-02 | 1959-08-04 | Mc Graw Edison Co | Magnetic core |
CH387781A (de) * | 1961-04-14 | 1965-02-15 | Bbc Brown Boveri & Cie | Magnetkern |
US3200358A (en) * | 1961-06-02 | 1965-08-10 | Basic Products Corp | Laminated transformer core |
NL6807776A (de) * | 1968-05-31 | 1969-12-02 | ||
US3895336A (en) * | 1974-06-24 | 1975-07-15 | Gen Electric | Transformer core with composite offset V-miter and step joint |
US4200854A (en) * | 1979-01-04 | 1980-04-29 | Westinghouse Electric Corp. | Core with step-lap joints |
US4827237A (en) * | 1988-08-29 | 1989-05-02 | Coils, Inc. | Transformer core assembly |
US5421957A (en) * | 1993-07-30 | 1995-06-06 | Applied Materials, Inc. | Low temperature etching in cold-wall CVD systems |
US5959523A (en) * | 1996-10-15 | 1999-09-28 | Abb Power T&D Company Inc. | Magnetic core structure |
KR100516908B1 (ko) * | 1997-04-11 | 2005-09-23 | 지멘스 에너지 앤드 오토메이션 인코포레이티드 | 변압기 또는 이와 유사한 전기장치를 위한 자기 조립체 |
-
2008
- 2008-04-10 EP EP08735299A patent/EP2260494B1/de active Active
- 2008-04-10 BR BRPI0822583A patent/BRPI0822583B8/pt active IP Right Grant
- 2008-04-10 US US12/937,477 patent/US8212645B2/en active Active
- 2008-04-10 WO PCT/EP2008/003074 patent/WO2009124574A1/de active Application Filing
- 2008-04-10 CA CA2721012A patent/CA2721012C/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
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CH257843A (de) * | 1941-01-29 | 1948-10-31 | Westinghouse Electric Corp | Elektrischer Apparat mit einem Magnetkern. |
DE1489773A1 (de) * | 1965-09-24 | 1969-09-04 | Continental Elektro Ind Ag | Geschichteter Eisenkern fuer elektrische Induktionsapparate |
DE1613654A1 (de) * | 1967-03-10 | 1970-05-14 | Funken Josef Dipl Ing | Eisenkern fuer elektrische Induktionsapparate |
US3743991A (en) * | 1971-08-18 | 1973-07-03 | Westinghouse Electric Corp | Magnetic core structures |
US6070317A (en) * | 1996-05-08 | 2000-06-06 | Espey Mfg. & Electronics Corp. | Quiet magnetic structures |
WO2000049628A1 (en) | 1999-02-17 | 2000-08-24 | Abb Power T & D Company Inc. | Stacked magnetic transformer core with center leg s-joints |
DE10132719A1 (de) | 2001-07-05 | 2003-01-16 | Abb T & D Tech Ltd | Verfahren zur Fertigung elektrischer Kernblech-Baugruppen |
EP1655747A2 (de) | 2004-11-05 | 2006-05-10 | era GmbH & Co. KG | Blechschnitt für einen geschichteten Kern eines Transformators |
WO2006105024A2 (en) | 2005-03-30 | 2006-10-05 | Abb Technology Ag | A transformer having a stacked core with a cruciform leg and a method of making the same |
Also Published As
Publication number | Publication date |
---|---|
BRPI0822583B1 (pt) | 2021-09-28 |
EP2260494A1 (de) | 2010-12-15 |
BRPI0822583B8 (pt) | 2023-04-25 |
CA2721012C (en) | 2017-03-07 |
US20110032069A1 (en) | 2011-02-10 |
CA2721012A1 (en) | 2009-10-15 |
US8212645B2 (en) | 2012-07-03 |
BRPI0822583A2 (pt) | 2021-04-13 |
EP2260494B1 (de) | 2013-03-20 |
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