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US2978530A - Conductor for transformer windings - Google Patents

Conductor for transformer windings Download PDF

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Publication number
US2978530A
US2978530A US816468A US81646859A US2978530A US 2978530 A US2978530 A US 2978530A US 816468 A US816468 A US 816468A US 81646859 A US81646859 A US 81646859A US 2978530 A US2978530 A US 2978530A
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US
United States
Prior art keywords
conductor
strands
wires
transformer windings
twisted
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.)
Expired - Lifetime
Application number
US816468A
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English (en)
Inventor
Braeckman Fernand
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.)
Umicore NV SA
Original Assignee
ACEC SA
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 ACEC SA filed Critical ACEC SA
Application granted granted Critical
Publication of US2978530A publication Critical patent/US2978530A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/02—Stranding-up
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/08—Several wires or the like stranded in the form of a rope
    • 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
    • H01F27/2823—Wires
    • 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
    • H01F27/2823—Wires
    • H01F2027/2838—Wires using transposed wires

Definitions

  • the invention relates to a special type of conductor for windings of transformers and similar apparatus.
  • Figure 1 shows, as an example, an horizontal cut through a classic interleaved transformer made up from disc coils, showing a high voltage winding HT between two low voltage windings BT.
  • the field F at any point may be split up into an axial component F and a radial component F,.
  • the extra losses developed in the conductors by these two components are proportional to the square of the field strength and to the square of the conductor dimensions.
  • transformer manufacture consists in winding up coils from subdivided insulated conductors which are interleaved during the winding operation.
  • Figure 2a presents, for example, a half out through a turn of a disc coil, the axis of which is shown as XX.
  • This turn is built up from three bundles comprising each three strands A, B, C, all being connected in parallel.
  • strands A and B interchange their position so that, on the average, these conductors will be submitted to a radial field corresponding to the one encountered at half thickness of the coil (it may be assumed that the radial field component varies linearly across the coil as shown in Figure 2b).
  • the electromotive force induced in the various individual strands by the radial component of the flux is roughly the same and they may be connected in parallel without any undue circulating current.
  • a further step is to compensate not only for the efiect of the radial flux F,, but as well for the axial component of the flux F,
  • Figure 3 presents a half cut through a turn, the axis of which is shown as XX, and incorporating nine strands A A B B B C C C operated in parallel. Crossovers are applied not only in the coil itself among the strands from the same 2,978,536 Patented Apr. 4, 1961 bundle, but as well among the bundles themselves. This set up is used principally for low voltage windings and tapping coils.
  • This conductor is made up from a cable comprising concentrically disposed strands twisted all in the same direction; said strands being formed by wires of small circular section insulated by enamel or any other suitable thin insulating material; strands from even layers are twisted in one way while those from odd layers are twisted the other; the cable so formed is then shaped to a rectangular cross section by pressing.
  • Figure 4 shows as a non-limitative example, a conduc tor incorporating the embodiments of the invention. It is made up from strands such as 1, 2 and 3, set in concentric layers. All these strands are twisted in the same direction and are formed by round Wires 4; said wires being of small cross section, enamel insulated and twisted in the way shown by arrows. Direction of twisting is alternated in each successive layer.
  • Figure 5 shows, diagrammatically, how the cable appears after having been formed into a rectangular cross section.
  • Direction of twisting of the wires within the strands, is shown by arrows as in Figure 4.
  • the conductor so formed may then be insulated, as commonly known in the art, by a material 5.
  • each of the wires 4 occupies all possible positions radially and axially and hence they are all submitted to the same average stray field.
  • An electrical conductor of rectangular cross-section comprising a plurality of strands arranged in a plurality of concentric, successive layers, said strands comprising electrically conductive wires helically twisted together in a common direction within respective strands in a given layer and twisted in opposite directions in alternate layers, insulation on each of said wires comprising a thin insulative coating, all of the strands in said conductor being helically twisted together in the same direction with the pitch of the helical twist being so chosen that the wires of two successive layers do not cross each other thereby to avoid damaging said thin insulative coating and preclude formation of short-circuited loops in the conductor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
US816468A 1958-06-02 1959-05-28 Conductor for transformer windings Expired - Lifetime US2978530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1198126T 1958-06-02

Publications (1)

Publication Number Publication Date
US2978530A true US2978530A (en) 1961-04-04

Family

ID=9669946

Family Applications (1)

Application Number Title Priority Date Filing Date
US816468A Expired - Lifetime US2978530A (en) 1958-06-02 1959-05-28 Conductor for transformer windings

Country Status (3)

Country Link
US (1) US2978530A (fr)
BE (1) BE579065A (fr)
FR (1) FR1198126A (fr)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283280A (en) * 1964-12-22 1966-11-01 Westinghouse Electric Corp Transposition for electrical conductors
DE2305957A1 (de) * 1973-02-07 1974-08-15 Siemens Ag Transformator fuer schaltnetzteile
DE2741257A1 (de) * 1976-09-22 1978-03-23 Marechal Sepm Nachgiebiger elektrischer druckkontakt
US4176905A (en) * 1976-09-22 1979-12-04 Societe d'Exploitation des Procedes Marechal SEPM Flexible electrical contact
EP0030580A1 (fr) * 1978-10-13 1981-06-24 ETAT-FRANCAIS représenté par le Délégué Général pour l' Armement Dispositif électrique d'allumage d'une substance pyrotechnique par induction électromagnétique
EP0092018A1 (fr) * 1982-04-21 1983-10-26 Spezielektra Esslinger K.G. Réactance, en particulier réactance isolée de l'air sans noyau magnétique
US4431860A (en) * 1981-08-13 1984-02-14 Westinghouse Canada Inc. Multistranded component conductor continuously transposed cable
US4439256A (en) * 1981-02-18 1984-03-27 New England Electric Wire Corporation Method of producing flat stranded magnetic conductor cable
EP0118390A1 (fr) * 1983-02-11 1984-09-12 Siemens Aktiengesellschaft Conducteur torsadé pour câbles électriques flexibles
EP0119155A1 (fr) * 1983-02-11 1984-09-19 Siemens Aktiengesellschaft Conducteur torsadé pour câbles électriques flexibles et procédé pour sa fabrication
US4538023A (en) * 1982-04-28 1985-08-27 Brisson Bruce A Audio signal cable
US4640983A (en) * 1984-04-09 1987-02-03 Institut Straumann Ag Conductor device, particularly for at least partial insertion in a human or animal body, comprising a spiral formed from at least one conductor
US4731506A (en) * 1986-10-29 1988-03-15 Noel Lee Signal cable assembly
US4734544A (en) * 1986-10-29 1988-03-29 Noel Lee Signal cable having an internal dielectric core
US4743712A (en) * 1987-03-30 1988-05-10 Noel Lee Signal cable assembly with fibrous insulation and an internal core
WO1988007749A1 (fr) * 1987-03-30 1988-10-06 Noel Lee Ensemble de cables porte-signal avec isolation fibreuse
US4829417A (en) * 1986-07-10 1989-05-09 Siemens Aktiengesellschaft High-power transformer
US4859978A (en) * 1988-04-29 1989-08-22 Electric Power Research Institute, Inc. High-voltage windings for shell-form power transformers
US4864266A (en) * 1988-04-29 1989-09-05 Electric Power Research Institute, Inc. High-voltage winding for core-form power transformers
US4912446A (en) * 1987-06-29 1990-03-27 Westinghouse Electric Corp. High energy density hyperconducting inductor
USRE33750E (en) * 1986-10-29 1991-11-26 Signal cable assembly
WO1995015569A1 (fr) * 1993-12-01 1995-06-08 Asta Elektrodraht Gmbh Fil torsade
US5483022A (en) * 1994-04-12 1996-01-09 Ventritex, Inc. Implantable conductor coil formed from cabled composite wire
US5508674A (en) * 1992-03-25 1996-04-16 Electric Power Research Institute, Inc. Core-form transformer
US6452101B1 (en) * 1998-08-11 2002-09-17 Hitachi, Ltd. Multi-core conductive wire and a method of manufacturing the same
US6649844B2 (en) * 2000-07-10 2003-11-18 Mitsunishi Denki Kabushiki Kaisha Coil conductor for dynamoelectric machine
US20040012290A1 (en) * 2002-07-19 2004-01-22 Worley Andrew C. Electric motor and generator component having a plurality of windings made from a plurality of individually conductive wires
US20050077075A1 (en) * 2003-10-09 2005-04-14 Yu Wang Flexible stator bars
EP1655740A1 (fr) * 2003-08-13 2006-05-10 Soshin Electric Co. Ltd. Fil torsade, enroulement utilisant ce fil, dispositif de filtration du bruit possedant cet enroulement et procede de production du fil torsade
US20060137899A1 (en) * 2002-12-20 2006-06-29 Klaus Schafer Extruded elastic insulation for conductors of electric machines
US20060162952A1 (en) * 2002-12-20 2006-07-27 Siemens Aktiengesellschaft Litz wire coils for electronic machines
US20080122310A1 (en) * 2004-02-02 2008-05-29 Alstom Technology Ltd Method for producing a conductor bar of transposed stranded conductors
DE102018122552A1 (de) * 2018-09-14 2020-03-19 Brusa Elektronik Ag Induktives Bauelement und Verfahren zum Herstellen des induktiven Bauelements
US20200161027A1 (en) * 2018-11-19 2020-05-21 Yazaki Corporation Composite stranded wire conductor and bending resistant electric wire
DE102019110051A1 (de) * 2019-04-16 2020-10-22 Markus Lasslop Stromleiter zur Bildung eines Wickelkörpers für eine elektrische Spule, z. B. eines Trafos oder einer Drossel
US11444517B2 (en) 2017-11-06 2022-09-13 Jheeco E-Drive Ag Device for producing stranded wires, a stranded wire and an electric machine having such a stranded wire
US20230197312A1 (en) * 2021-07-15 2023-06-22 Spr Therapeutics, Inc. Fracture resistant stimulation lead
US11887756B2 (en) * 2021-11-05 2024-01-30 Sumitomo Electric Industries, Ltd. Thick electric wire

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE227417C1 (sv) * 1961-01-10 1969-10-21 Acec Induktansspole för trefasström med mycket hög spänning och stor effekt
GB1422333A (fr) * 1972-03-16 1976-01-28
DE2644975A1 (de) * 1976-10-06 1978-04-13 Transformatoren Union Ag Wicklung fuer transformatoren und drosseln mit mehreren magnetisch ausgekreuzten parallelzweigen
US4460885A (en) * 1981-07-29 1984-07-17 Westinghouse Electric Corp. Power transformer
FR2628882B1 (fr) * 1988-03-18 1995-02-17 Electro Mec Nivernais Bobinage electrique a securite contre l'incendie, et appareil electrique muni d'un tel bobinage
DE4233898A1 (de) * 1992-10-08 1994-04-14 Bosch Gmbh Robert Transformatorwicklung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US297177A (en) * 1884-04-22 shelbourne
US587764A (en) * 1897-08-10 Wire for armature-windings
GB309596A (en) * 1928-04-13 1930-02-20 British Thomson Houston Co Ltd Improvements in and relating to windings for transformers, reactors and other inductive apparatus
US1904162A (en) * 1930-08-13 1933-04-18 Milliken Humphreys Electrical cable
US2081427A (en) * 1935-02-16 1937-05-25 Bell Telephone Labor Inc Electric communication cable
FR855005A (fr) * 1938-05-22 1940-04-30 Fides Câble de transmission à distance composé d'au moins deux couches câblées voisines ayant même sens de câblage, destiné en particulier aux transmissions par courants porteurs de haute fréquence

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US297177A (en) * 1884-04-22 shelbourne
US587764A (en) * 1897-08-10 Wire for armature-windings
GB309596A (en) * 1928-04-13 1930-02-20 British Thomson Houston Co Ltd Improvements in and relating to windings for transformers, reactors and other inductive apparatus
US1904162A (en) * 1930-08-13 1933-04-18 Milliken Humphreys Electrical cable
US2081427A (en) * 1935-02-16 1937-05-25 Bell Telephone Labor Inc Electric communication cable
FR855005A (fr) * 1938-05-22 1940-04-30 Fides Câble de transmission à distance composé d'au moins deux couches câblées voisines ayant même sens de câblage, destiné en particulier aux transmissions par courants porteurs de haute fréquence

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3283280A (en) * 1964-12-22 1966-11-01 Westinghouse Electric Corp Transposition for electrical conductors
DE2305957A1 (de) * 1973-02-07 1974-08-15 Siemens Ag Transformator fuer schaltnetzteile
DE2741257A1 (de) * 1976-09-22 1978-03-23 Marechal Sepm Nachgiebiger elektrischer druckkontakt
US4176905A (en) * 1976-09-22 1979-12-04 Societe d'Exploitation des Procedes Marechal SEPM Flexible electrical contact
EP0030580A1 (fr) * 1978-10-13 1981-06-24 ETAT-FRANCAIS représenté par le Délégué Général pour l' Armement Dispositif électrique d'allumage d'une substance pyrotechnique par induction électromagnétique
US4439256A (en) * 1981-02-18 1984-03-27 New England Electric Wire Corporation Method of producing flat stranded magnetic conductor cable
US4431860A (en) * 1981-08-13 1984-02-14 Westinghouse Canada Inc. Multistranded component conductor continuously transposed cable
EP0092018A1 (fr) * 1982-04-21 1983-10-26 Spezielektra Esslinger K.G. Réactance, en particulier réactance isolée de l'air sans noyau magnétique
US4538023A (en) * 1982-04-28 1985-08-27 Brisson Bruce A Audio signal cable
EP0118390A1 (fr) * 1983-02-11 1984-09-12 Siemens Aktiengesellschaft Conducteur torsadé pour câbles électriques flexibles
EP0119155A1 (fr) * 1983-02-11 1984-09-19 Siemens Aktiengesellschaft Conducteur torsadé pour câbles électriques flexibles et procédé pour sa fabrication
US4640983A (en) * 1984-04-09 1987-02-03 Institut Straumann Ag Conductor device, particularly for at least partial insertion in a human or animal body, comprising a spiral formed from at least one conductor
US4829417A (en) * 1986-07-10 1989-05-09 Siemens Aktiengesellschaft High-power transformer
US4731506A (en) * 1986-10-29 1988-03-15 Noel Lee Signal cable assembly
WO1988003318A1 (fr) * 1986-10-29 1988-05-05 Noel Lee Structure amelioree de cables de signaux
US4734544A (en) * 1986-10-29 1988-03-29 Noel Lee Signal cable having an internal dielectric core
USRE33750E (en) * 1986-10-29 1991-11-26 Signal cable assembly
US4743712A (en) * 1987-03-30 1988-05-10 Noel Lee Signal cable assembly with fibrous insulation and an internal core
WO1988007749A1 (fr) * 1987-03-30 1988-10-06 Noel Lee Ensemble de cables porte-signal avec isolation fibreuse
US4777324A (en) * 1987-03-30 1988-10-11 Noel Lee Signal cable assembly with fibrous insulation
US4912446A (en) * 1987-06-29 1990-03-27 Westinghouse Electric Corp. High energy density hyperconducting inductor
US4859978A (en) * 1988-04-29 1989-08-22 Electric Power Research Institute, Inc. High-voltage windings for shell-form power transformers
US4864266A (en) * 1988-04-29 1989-09-05 Electric Power Research Institute, Inc. High-voltage winding for core-form power transformers
WO1990006584A1 (fr) * 1988-11-29 1990-06-14 Electric Power Research Institute, Inc. Enroulement haute tension pour transformateurs de puissance a colonnes
US5508674A (en) * 1992-03-25 1996-04-16 Electric Power Research Institute, Inc. Core-form transformer
WO1995015569A1 (fr) * 1993-12-01 1995-06-08 Asta Elektrodraht Gmbh Fil torsade
US5483022A (en) * 1994-04-12 1996-01-09 Ventritex, Inc. Implantable conductor coil formed from cabled composite wire
US6452101B1 (en) * 1998-08-11 2002-09-17 Hitachi, Ltd. Multi-core conductive wire and a method of manufacturing the same
US6649844B2 (en) * 2000-07-10 2003-11-18 Mitsunishi Denki Kabushiki Kaisha Coil conductor for dynamoelectric machine
US7262537B2 (en) * 2002-07-19 2007-08-28 Hamilton Sundstrand Corporation Electric motor and generator component having a plurality of windings made from a plurality of individually conductive wires
US20040012290A1 (en) * 2002-07-19 2004-01-22 Worley Andrew C. Electric motor and generator component having a plurality of windings made from a plurality of individually conductive wires
US20060137899A1 (en) * 2002-12-20 2006-06-29 Klaus Schafer Extruded elastic insulation for conductors of electric machines
US20060162952A1 (en) * 2002-12-20 2006-07-27 Siemens Aktiengesellschaft Litz wire coils for electronic machines
EP1655740A1 (fr) * 2003-08-13 2006-05-10 Soshin Electric Co. Ltd. Fil torsade, enroulement utilisant ce fil, dispositif de filtration du bruit possedant cet enroulement et procede de production du fil torsade
EP1655740A4 (fr) * 2003-08-13 2008-07-16 Soshin Electric Fil torsade, enroulement utilisant ce fil, dispositif de filtration du bruit possedant cet enroulement et procede de production du fil torsade
US20050077075A1 (en) * 2003-10-09 2005-04-14 Yu Wang Flexible stator bars
US20080122310A1 (en) * 2004-02-02 2008-05-29 Alstom Technology Ltd Method for producing a conductor bar of transposed stranded conductors
US7863795B2 (en) * 2004-02-02 2011-01-04 Alstom Technology Ltd Method for producing a conductor bar of transposed stranded conductors
US11444517B2 (en) 2017-11-06 2022-09-13 Jheeco E-Drive Ag Device for producing stranded wires, a stranded wire and an electric machine having such a stranded wire
DE102018122552A1 (de) * 2018-09-14 2020-03-19 Brusa Elektronik Ag Induktives Bauelement und Verfahren zum Herstellen des induktiven Bauelements
US20200161027A1 (en) * 2018-11-19 2020-05-21 Yazaki Corporation Composite stranded wire conductor and bending resistant electric wire
DE102019110051A1 (de) * 2019-04-16 2020-10-22 Markus Lasslop Stromleiter zur Bildung eines Wickelkörpers für eine elektrische Spule, z. B. eines Trafos oder einer Drossel
DE102019110051B4 (de) 2019-04-16 2023-12-07 Markus Lasslop Stromleiter zur Bildung eines Wickelkörpers für eine elektrische Spule, z. B. eines Trafos oder einer Drossel
US20230197312A1 (en) * 2021-07-15 2023-06-22 Spr Therapeutics, Inc. Fracture resistant stimulation lead
US11742106B2 (en) * 2021-07-15 2023-08-29 Spr Therapeutics, Inc. Fracture resistant stimulation lead
US11887756B2 (en) * 2021-11-05 2024-01-30 Sumitomo Electric Industries, Ltd. Thick electric wire

Also Published As

Publication number Publication date
FR1198126A (fr) 1959-12-04
BE579065A (fr) 1959-09-16

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