EP0120154A1 - Stetig versetzter Leiter - Google Patents

Stetig versetzter Leiter Download PDF

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Publication number
EP0120154A1
EP0120154A1 EP83301704A EP83301704A EP0120154A1 EP 0120154 A1 EP0120154 A1 EP 0120154A1 EP 83301704 A EP83301704 A EP 83301704A EP 83301704 A EP83301704 A EP 83301704A EP 0120154 A1 EP0120154 A1 EP 0120154A1
Authority
EP
European Patent Office
Prior art keywords
cable
mandrel
conductors
transposed
wound
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.)
Withdrawn
Application number
EP83301704A
Other languages
English (en)
French (fr)
Inventor
Patrick Earl Burke
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.)
Trench Electric Ltd
Original Assignee
Trench Electric Ltd
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 Trench Electric Ltd filed Critical Trench Electric Ltd
Priority to EP83301704A priority Critical patent/EP0120154A1/de
Publication of EP0120154A1 publication Critical patent/EP0120154A1/de
Withdrawn legal-status Critical Current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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
    • H01B7/306—Transposed conductors
    • 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
    • H01B13/0278—Stranding machines comprising a transposing mechanism

Definitions

  • This invention relates to inductive windings for electrical transformers, reactors and the like, and more parti- :ularly to low loss, flat or rectangular shaped cabled conductor or use in such equipment and a method of making the same.
  • any high current or high frequency induction apparatus electrical losses occur in the windings due to skin effects and proximity effects, and it is known that such losses may be reduced by dividing the conductors of which the windings are made into small sub-conductors which may or may not be insulated from each other and which may be transposed relative to each other.
  • the transposition of the subconductors should be such that all sub- conductors are linked by the same quantity of magnetic flux so as to ensure that each subconductor will have the same effective inductance and therefore each will carry its proper share of the total current.
  • Eddy current losses per unit length of subconductor vary as the cube of the subconductor dimension normal to the incident magnetic field, so that rectangular subconductors are not the optimum shape for the construction of induction apparatus in which the direction of the magnetic field is different in different regions of the apparatus.
  • the field near the center plane of the reactor is axial whereas the field near the end plane of the reactor is radial. If the thin side of the subconductor.
  • a cable comprising rectangular subconductors is easy to bend in a direction normal to the long side of the subconductors, but is very difficult to bend in the direction normal to the thin side of the subconductors without buckling the cable.
  • the use of square or round subconductors facilitates bending of the main conductor in either of its principal directions.
  • The-problems surrounding the use of rectangular subconductors are at least partially solved in a construction known in the art as a "Litz" cable (such as that sold by New England Electric Wire Corp. Portugal N.H., which in its basic form, is essentially a standard 1 x 7 cable construction which may be roll pressed to a rectangular final cross sectional shape.
  • the disadvantage of this construction is that the central subconductor, or even rope, which acts as a core and around which the remaining six subconductors are continuously transposed, does not.change its position, i.e. is not transposed, and consequently it does not carry its proper share of the current, and the cable therefore has a poor packing factor.
  • an object of the present invention to provide an improved, conductor cable in which all.the sub- conductors in the construction are continuously and equally transposed and which has an improved packing factor.
  • Another object of the present invention is to provide a method for producing the improved continuously transposed cable of the present invention invention to a principal aspect of this invention there is provided a method for making a continuously and uniformly transposed electrical cable, comprising:
  • Figure 1 illustrates a transposed cable of the prior art comprising an odd-numbered plurality of rectangular subconductors or strands 1, each having a width to thickness ratio of about 3:1, arranged in two columns or layers with a strand at the end of one of the layers projecting past the adjacent layer and transposed about the main axis of the cable at a specific transposition point, by means of a first discrete bend which moves the strand to the adjacent layer and a second discrete bend which moves each of the strands in the newly vacated layer, one strand position in the same layer to fill the layer.
  • this method of transposition is not entirely uniform or continuous and, furthermore, the odd strand on the top of the layers creates a non-uniform appearanc and is relatively bulky.
  • Litz cable which represents the simplest and least complicated form of a "Litz" cable, in which a plurality of subconductors or strands are continuously transposed about a core conductor or strand 3.
  • Core 3 may be an electrical conductor or may simply be an inert core such as a rope core.
  • the strands 2 may be single conductors or may themselves consist of a number of sub-subconductors which are bunch laid or otherwise transposed, and the result is a uniformly shaped cable having a relatively poor space factor due to the presence of the non-transposed and largely electrically useless core 3.
  • Litz cable may be roll formed to a rectangular shape or flattened and may have multilayers of unilaid conductors.
  • Figure 3 illustrates a cable 4 of the present invention in its simplest form and which consists of a plurality of circular insulated or uninsulated subconductors 5 cabled together without a core conductor or the like, so that each and every subconductor 5 is uniformly and continuously transposed along the length of the cable.
  • each subconductor 5 may be a single strand or a number of bunch laid or cabled sub-subconductors which may in turn be cabled.
  • the cable 4 may be roll formed to achieve compaction and to form the conductor into a rectangular or sheet form.
  • the cable 4 of Figure 3 is manufactured using a method and apparatus as illustrated schematically in Figure 5.
  • a plurality of cable spools 10 each carrying a supply of insulated or uninsulated conductor wire strands, rotatably mounted adjacent the periphery of a circular base member 11 which in turn is mounted on an axle 12 driven for axial rotation by means of drive means 19.
  • Wires from spools 10 are drawn through respective guide holes 13 in a feed strand guide 14 mounted on axle 12 for rotation therewith.
  • the wires, as they are drawn from the spools are wound around a mandrel 15 which extends axially from axle 12 and is stationary relative thereto.
  • the wires are drawn from the spools by means of any suitable cable gripping and drawing device shown schematically at 16.
  • the cabled conductors are continuously drawn off mandrel 15 as they are wound therearound and downstream from the mandrel the cable may be press rolled at 17 to compress and shape the cable into a rectangular, square or sheet, i.e. thin strip cross-sectional shape as required.
  • the cable may also be wrapped with insulation by a conventional cable wrapping device 18.
  • a barrier strip 20, from spool 21 may be introduced between the mandrel 15 and the conductors.
  • the conductors and barrier strip are pulled off the mandrel simultaneously so that, after roll forming, the barrier strip lies between the two sides of the conductor and prevents the subconductors from touching each other.
  • the subconductors may be insulated or uninsulated depending on the importance of eddy currents in the apparatus in which the cable is to be used. Where the magnetic field strength is large and/or the frequency is high, the strands may require insulation so as to keep eddy currents small. It will be observed that if a barrier strip is introduced, as described above, during manufacture, it is only necessary to insulate every second subconductor in order to achieve full isolation between the conductors.
  • a slightly more complex embodiment of the invention may be achieved by using subconductors that themselves are formed from a number of sub-subconductors which are insulated ind then bunched, cabled or otherwise transposed to form a 5 ubconductor all of the sub-subconductors of which will share current uniformly.
  • FIG. 4 Another more complex embodiment of the invention is illustrated in Figure 4.
  • a second layer of subconductors 45 (which may be either simple conductors or nay consist of sub-subconductors) is wound in the same direction over the.top of the first layer 46 after this layer has been roll formed into a compact rectangular shape so as to form a unidirectionally laid, or unilaid, cable.
  • the second layer is also roll formed in order to compact the cable and to make its cross-section rectangular.
  • the subconductors are drawn from an array of reels 61 rotatably mounted on a fixed frame through a strand guide 62 onto a rotating mandrel 63 by a take up reel 67.
  • a barrier strip 64 formed into a cylinder at 65 may be introduced between the mandrel 63 and the conductor as described above.
  • the conductor and barrier strip are slid over the rotating mandrel continuously and then roll formed at 66 to achieve compaction and to form the conductor into a rectangular or sheet form.
  • the roll forming mechanism 66 must be rotated at the same speed as the mandrel 63 as must the taping machine (if provided) and the take-up reel 67.
  • An alternative method of achieving compaction is to use subconductors which are already square in cross-section or to use round subconductors but to roll form them (68) into a rectangular sheet prior to winding them on the rotating mandrel (63).
  • Cables manufactured according to the present invention offer several advantages over the transposed cables of the prior art. For example:
  • this coil will be the same whether it is made with traditional rectangular transposed cable or with continuously transposed cable. However there is a significant difference in the conductor eddy losses.
  • Rectangular transposed cable consisted of sub- conductors of rectangular section.
  • the width to thickness ratios of the subconductors were in the range of 2:1 or 3:1.
  • Eddy loss is proportional to the cube of the dimension which is normal to the incident field.
  • rectangular subconductors it is only possible to orientate them so that their smallest dimension sees the incident field in one part of the winding (normally the middle portion) but the larger dimension will see the largest portion of the field in another part of the winding (the end portion) and the eddy loss will be significantly higher.
  • the subconductors can be round or square and hence the eddy loss will be the same in all parts of the winding.
  • the ringing frequency is 4 kHz and the Q at the frequency must be approximately 250.
  • the Q at the frequency must be approximately 250.
  • 34 subconductors each comprising 80 #30 bunched copper strands may be used to produce a flat cable about two inches wide and 0.2 inches thick. This cable will be perfectly transposed and have a packing factor of about 0.6. In the alternative it is possible to use 17 subconductors each comprising 80 bunched #30 copper strands to produce a 1 inch by 0.2 inch flat cable having a packing factor of 0.6. Two of these cables can be used in parallel providing that they are properly transposed themselves to carry equal currents.
  • the coil made from the continuously transposed sheet is approximately 20% lighter and 25% smaller in diameter and height for the same Q factor.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP83301704A 1983-03-25 1983-03-25 Stetig versetzter Leiter Withdrawn EP0120154A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83301704A EP0120154A1 (de) 1983-03-25 1983-03-25 Stetig versetzter Leiter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83301704A EP0120154A1 (de) 1983-03-25 1983-03-25 Stetig versetzter Leiter

Publications (1)

Publication Number Publication Date
EP0120154A1 true EP0120154A1 (de) 1984-10-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83301704A Withdrawn EP0120154A1 (de) 1983-03-25 1983-03-25 Stetig versetzter Leiter

Country Status (1)

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EP (1) EP0120154A1 (de)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133220A2 (de) * 1983-07-22 1985-02-20 Kabel- und Lackdrahtfabriken GmbH Elektrischer Leiter
WO1987003380A1 (en) * 1985-11-26 1987-06-04 Minelab Electronic Industries Ltd. Metal detector sensing head with reduced eddy current coils
AU602132B2 (en) * 1985-11-26 1990-10-04 Bhc Consulting Pty Ltd Metal detector sensing head with reduced eddy current coils
EP0407709A1 (de) * 1989-07-14 1991-01-16 Lackdraht Union Gmbh Verfahren zur Herstellung von Röbelstäben
WO1995015569A1 (de) * 1993-12-01 1995-06-08 Asta Elektrodraht Gmbh Drilleiter
WO1997045907A2 (en) * 1996-05-29 1997-12-04 Asea Brown Boveri Ab Rotating electrical machine plants
US6226163B1 (en) 1996-12-17 2001-05-01 Asea Brown Boveri Ab Device and method relating to protection of an object against over-currents comprising over-current reduction
US6261437B1 (en) 1996-11-04 2001-07-17 Asea Brown Boveri Ab Anode, process for anodizing, anodized wire and electric device comprising such anodized wire
US6279850B1 (en) 1996-11-04 2001-08-28 Abb Ab Cable forerunner
FR2811487A1 (fr) * 2000-07-10 2002-01-11 Mitsubishi Electric Corp Conducteur pour bobine destine a une machine dynamo-electrique
US6357688B1 (en) 1997-02-03 2002-03-19 Abb Ab Coiling device
US6369470B1 (en) 1996-11-04 2002-04-09 Abb Ab Axial cooling of a rotor
EP1195778A2 (de) * 2000-10-03 2002-04-10 The Furukawa Electric Co., Ltd. Verfahren zur Herstellung eines isolierten Drahtes
US6376775B1 (en) 1996-05-29 2002-04-23 Abb Ab Conductor for high-voltage windings and a rotating electric machine comprising a winding including the conductor
US6396187B1 (en) 1996-11-04 2002-05-28 Asea Brown Boveri Ab Laminated magnetic core for electric machines
US6417456B1 (en) 1996-05-29 2002-07-09 Abb Ab Insulated conductor for high-voltage windings and a method of manufacturing the same
US6429563B1 (en) 1997-02-03 2002-08-06 Abb Ab Mounting device for rotating electric machines
US6439497B1 (en) 1997-02-03 2002-08-27 Abb Ab Method and device for mounting a winding
US6465979B1 (en) 1997-02-03 2002-10-15 Abb Ab Series compensation of electric alternating current machines
US6525265B1 (en) 1997-11-28 2003-02-25 Asea Brown Boveri Ab High voltage power cable termination
US6525504B1 (en) 1997-11-28 2003-02-25 Abb Ab Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine
US6577487B2 (en) 1996-05-29 2003-06-10 Asea Brown Boveri Ab Reduction of harmonics in AC machines
US6646363B2 (en) 1997-02-03 2003-11-11 Abb Ab Rotating electric machine with coil supports
US6801421B1 (en) 1998-09-29 2004-10-05 Abb Ab Switchable flux control for high power static electromagnetic devices
US6825585B1 (en) 1997-02-03 2004-11-30 Abb Ab End plate
US6828701B1 (en) 1997-02-03 2004-12-07 Asea Brown Boveri Ab Synchronous machine with power and voltage control
US6831388B1 (en) 1996-05-29 2004-12-14 Abb Ab Synchronous compensator plant
WO2006024057A1 (de) * 2004-09-03 2006-03-09 Coil Innovation Gmbh Verfahren und vorrichtung zum herstellen einer spulenwicklung
US7346974B2 (en) * 2004-02-02 2008-03-25 Alstom Technology Ltd Method for producing a conductor bar of transposed stranded conductors
WO2011009729A3 (de) * 2009-07-22 2011-03-17 Asta Elektrodraht Gmbh Kontinuierlicher drillleiter
CN105047313A (zh) * 2015-06-29 2015-11-11 无锡锡洲电磁线有限公司 组合换位导线的放线结构
CN106448933A (zh) * 2016-11-25 2017-02-22 天津经纬电材股份有限公司 换位导线星型盘专用调平装置
CN114267494A (zh) * 2021-12-10 2022-04-01 江苏浦漕科技股份有限公司 一种铝合金柔性光伏电缆绞合设备及其绞合方法
CN115841895A (zh) * 2023-02-16 2023-03-24 四川明达电线电缆科技有限公司 一种低烟无卤安全电缆及其生产设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1802302A (en) * 1925-02-03 1931-04-21 American Lurgi Corp Hollow conductor and method of manufacturing same
US2018461A (en) * 1931-11-13 1935-10-22 Western Electric Co Multiple conductor sector electric cable
DE1665295A1 (de) * 1967-01-10 1971-01-28 Oki Electric Cable Verfahren und Vorrichtung zum Herstellen von Litzenkabeln nach dem mit hoher Geschwindigkeit arbeitenden Zug-Spiralen-System
GB1450678A (en) * 1972-11-24 1976-09-22 Science Res Council Methods of and apparatus for the manufacture of standard cables

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1802302A (en) * 1925-02-03 1931-04-21 American Lurgi Corp Hollow conductor and method of manufacturing same
US2018461A (en) * 1931-11-13 1935-10-22 Western Electric Co Multiple conductor sector electric cable
DE1665295A1 (de) * 1967-01-10 1971-01-28 Oki Electric Cable Verfahren und Vorrichtung zum Herstellen von Litzenkabeln nach dem mit hoher Geschwindigkeit arbeitenden Zug-Spiralen-System
GB1450678A (en) * 1972-11-24 1976-09-22 Science Res Council Methods of and apparatus for the manufacture of standard cables

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0133220A2 (de) * 1983-07-22 1985-02-20 Kabel- und Lackdrahtfabriken GmbH Elektrischer Leiter
EP0133220A3 (de) * 1983-07-22 1986-02-12 Kabel- und Lackdrahtfabriken GmbH Elektrischer Leiter
WO1987003380A1 (en) * 1985-11-26 1987-06-04 Minelab Electronic Industries Ltd. Metal detector sensing head with reduced eddy current coils
US4890064A (en) * 1985-11-26 1989-12-26 Minelab Electronic Industries Ltd. Metal detector sensing head with reduced eddy current coils
AU602132B2 (en) * 1985-11-26 1990-10-04 Bhc Consulting Pty Ltd Metal detector sensing head with reduced eddy current coils
EP0407709A1 (de) * 1989-07-14 1991-01-16 Lackdraht Union Gmbh Verfahren zur Herstellung von Röbelstäben
WO1995015569A1 (de) * 1993-12-01 1995-06-08 Asta Elektrodraht Gmbh Drilleiter
AT550U1 (de) * 1993-12-01 1995-12-27 Asta Elektrodraht Gmbh Drilleiter
EA001488B1 (ru) * 1996-05-29 2001-04-23 Абб Аб Установка, содержащая вращающуюся электрическую машину, вращающаяся высоковольтная машина и способ изготовления цепи для вращающейся высоковольтной машины
WO1997045907A3 (en) * 1996-05-29 1998-01-15 Asea Brown Boveri Rotating electrical machine plants
US6417456B1 (en) 1996-05-29 2002-07-09 Abb Ab Insulated conductor for high-voltage windings and a method of manufacturing the same
WO1997045907A2 (en) * 1996-05-29 1997-12-04 Asea Brown Boveri Ab Rotating electrical machine plants
US6831388B1 (en) 1996-05-29 2004-12-14 Abb Ab Synchronous compensator plant
US6822363B2 (en) 1996-05-29 2004-11-23 Abb Ab Electromagnetic device
US6577487B2 (en) 1996-05-29 2003-06-10 Asea Brown Boveri Ab Reduction of harmonics in AC machines
US6376775B1 (en) 1996-05-29 2002-04-23 Abb Ab Conductor for high-voltage windings and a rotating electric machine comprising a winding including the conductor
US6261437B1 (en) 1996-11-04 2001-07-17 Asea Brown Boveri Ab Anode, process for anodizing, anodized wire and electric device comprising such anodized wire
US6279850B1 (en) 1996-11-04 2001-08-28 Abb Ab Cable forerunner
US6369470B1 (en) 1996-11-04 2002-04-09 Abb Ab Axial cooling of a rotor
US6396187B1 (en) 1996-11-04 2002-05-28 Asea Brown Boveri Ab Laminated magnetic core for electric machines
US6226163B1 (en) 1996-12-17 2001-05-01 Asea Brown Boveri Ab Device and method relating to protection of an object against over-currents comprising over-current reduction
US6828701B1 (en) 1997-02-03 2004-12-07 Asea Brown Boveri Ab Synchronous machine with power and voltage control
US6439497B1 (en) 1997-02-03 2002-08-27 Abb Ab Method and device for mounting a winding
US6465979B1 (en) 1997-02-03 2002-10-15 Abb Ab Series compensation of electric alternating current machines
US6429563B1 (en) 1997-02-03 2002-08-06 Abb Ab Mounting device for rotating electric machines
US6646363B2 (en) 1997-02-03 2003-11-11 Abb Ab Rotating electric machine with coil supports
US6357688B1 (en) 1997-02-03 2002-03-19 Abb Ab Coiling device
US6825585B1 (en) 1997-02-03 2004-11-30 Abb Ab End plate
US6525265B1 (en) 1997-11-28 2003-02-25 Asea Brown Boveri Ab High voltage power cable termination
US6525504B1 (en) 1997-11-28 2003-02-25 Abb Ab Method and device for controlling the magnetic flux in a rotating high voltage electric alternating current machine
US6801421B1 (en) 1998-09-29 2004-10-05 Abb Ab Switchable flux control for high power static electromagnetic devices
FR2811487A1 (fr) * 2000-07-10 2002-01-11 Mitsubishi Electric Corp Conducteur pour bobine destine a une machine dynamo-electrique
EP1195778A2 (de) * 2000-10-03 2002-04-10 The Furukawa Electric Co., Ltd. Verfahren zur Herstellung eines isolierten Drahtes
EP1195778A3 (de) * 2000-10-03 2003-01-08 The Furukawa Electric Co., Ltd. Verfahren zur Herstellung eines isolierten Drahtes
US6925703B2 (en) 2000-10-03 2005-08-09 The Furukawa Electric Co., Ltd. Method for producing an insulated wire
US7356911B2 (en) 2000-10-03 2008-04-15 The Furukawa Electric Co., Ltd. Method for producing an insulated wire
US7346974B2 (en) * 2004-02-02 2008-03-25 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
WO2006024057A1 (de) * 2004-09-03 2006-03-09 Coil Innovation Gmbh Verfahren und vorrichtung zum herstellen einer spulenwicklung
WO2011009729A3 (de) * 2009-07-22 2011-03-17 Asta Elektrodraht Gmbh Kontinuierlicher drillleiter
CN105047313A (zh) * 2015-06-29 2015-11-11 无锡锡洲电磁线有限公司 组合换位导线的放线结构
CN106448933A (zh) * 2016-11-25 2017-02-22 天津经纬电材股份有限公司 换位导线星型盘专用调平装置
CN114267494A (zh) * 2021-12-10 2022-04-01 江苏浦漕科技股份有限公司 一种铝合金柔性光伏电缆绞合设备及其绞合方法
CN114267494B (zh) * 2021-12-10 2022-11-01 江苏浦漕科技股份有限公司 一种铝合金柔性光伏电缆绞合设备及其绞合方法
CN115841895A (zh) * 2023-02-16 2023-03-24 四川明达电线电缆科技有限公司 一种低烟无卤安全电缆及其生产设备
CN115841895B (zh) * 2023-02-16 2023-05-05 四川明达电线电缆科技有限公司 一种低烟无卤安全电缆及其生产设备

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Inventor name: BURKE, PATRICK EARL