WO2016202686A1 - Procédé de fabrication d'un câble pour un enroulement d'un dispositif à induction électromagnétique - Google Patents

Procédé de fabrication d'un câble pour un enroulement d'un dispositif à induction électromagnétique Download PDF

Info

Publication number
WO2016202686A1
WO2016202686A1 PCT/EP2016/063239 EP2016063239W WO2016202686A1 WO 2016202686 A1 WO2016202686 A1 WO 2016202686A1 EP 2016063239 W EP2016063239 W EP 2016063239W WO 2016202686 A1 WO2016202686 A1 WO 2016202686A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic material
strands
tape
conductor
strand
Prior art date
Application number
PCT/EP2016/063239
Other languages
English (en)
Inventor
Manoj Pradhan
Roberto Zannol
Torbjörn Wass
Göran ERIKSSON
Original Assignee
Abb Schweiz 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 Abb Schweiz Ag filed Critical Abb Schweiz Ag
Publication of WO2016202686A1 publication Critical patent/WO2016202686A1/fr

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
    • H01F27/2823—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
    • H01F27/288—Shielding

Definitions

  • the present disclosure generally relates to electric power systems and in particular to a method of manufacturing a cable for windings of an
  • Electromagnetic induction devices such as transformers and reactors, are used in power systems for voltage level control.
  • a transformer is an electromagnetic induction device used to step up and step down voltage in electric power systems in order to generate, transmit and utilize electrical power in a cost effective manner.
  • a transformer has two main parts, a magnetic circuit, the core, made of e.g. laminated iron and an electrical circuit, windings, usually made of aluminium or copper wire.
  • transformers used in electrical power networks are generally designed with high efficiency and with a set of stringent operational criteria e.g.
  • transformer design faces more and more constraints.
  • the load loss (LL) consists of perceivably three different types of losses based on their origin, i) the PR losses due to inherent resistance of winding conductors, also called DC loss, ii) the eddy current loss (ECL) in the windings due to the time-varying magnetic field created by the load current in all winding conductors, the leakage field and iii) the stray losses, i.e. ECL in other structural parts of the transformer due to the leakage field.
  • the PR losses due to inherent resistance of winding conductors also called DC loss
  • ECL eddy current loss
  • CTC continuously transposed cables
  • EP2695174 discloses a cable with lower eddy current losses.
  • EP2695174 discloses a cable that comprises a conductor, and a layer comprising a magnetic material having a relative permeability in the range 100 to 5000.
  • the layer at least partly surrounds the conductor, and has a thickness that is in the range 200 to 800 ⁇ .
  • An object of the present disclosure is to provide a method of producing a cable having a conductor that is provided with a layer of magnetic material.
  • a method of manufacturing a cable for a winding of an electromagnetic induction device comprising: a) providing a layer of magnetic material onto a conductor.
  • the leakage flux will redistribute and part of it will be confined to the layer and thereby substantially reduce the eddy loss in the conductor.
  • the operation of an electromagnetic induction device comprising the present cable may be made more efficient performance-wise.
  • the loss reduction may be of the order 5-10 %.
  • the impedance of an electromagnetic induction device arranged with the cable presented herein can be controlled by means of the magnetic material.
  • the cable according to the present disclosure may be particularly advantageous for high voltage applications where high currents are present, thus resulting in high losses. It is to be noted, however, that the cable could also be used for medium voltage applications and even low voltage applications.
  • the cable cross section can be made solid, or the cable can be manufactured with a fewer number of strands, with each strand having a thicker cross-sectional dimension. Further the need for stronger copper material, i.e. the Yield strength, is reduced. Strands with thicker dimension are less expensive to manufacture, thereby reducing the costs for
  • the conductor is a single strand.
  • step a) involves providing the magnetic material onto the strand by means of a cladding process.
  • step a) involves coating the strand with the magnetic material.
  • the coating is made by one of the group of electroplating, spraying and physical vapour deposition.
  • the coating involves coating the strand with epoxy comprising the magnetic material.
  • step a) involves providing a tape comprising the magnetic material onto the strand.
  • step a) involves winding a plurality of overlapping layers of the tape onto the strand.
  • step a) involves annealing the tape.
  • the tape is an amorphous tape or a non-grain oriented crystalline steel tape.
  • One embodiment comprises repeating step a) for a plurality of strands, and b) forming a bundle of strands of the strands.
  • the conductor is formed by a bundle of strands.
  • step a) involves winding a plurality of overlapping layers of tape comprising the magnetic material onto the bundle of strands.
  • step a) involves annealing the tape.
  • the tape is an amorphous tape or a non-grain oriented crystalline steel tape.
  • step a) involves coating the bundle of strands with the magnetic material.
  • the coating is made by one of the group of electroplating, spraying and physical vapour deposition.
  • the coating involves coating the bundle of strands with epoxy comprising the magnetic material.
  • One embodiment comprises b') winding layers of paper around the bundle of strands.
  • the electromagnetic induction device is a transformer or a reactor.
  • Fig. l is a flowchart of a method of manufacturing a cable for a winding of an electromagnetic induction device
  • Fig. 2 schematically shows a number of examples of manufacturing the cable
  • Fig. 3a shows a perspective view of a cable produced according to one variation of the method presented herein;
  • Fig. 3b shows a longitudinal section of the cable in Fig. 3a, especially of a tape comprising magnetic material, and paper insulation, wound around a conductor of the cable.
  • This disclosure describes methods of manufacturing a cable for a winding of an electromagnetic induction device.
  • an electromagnetic induction device may in particular be a medium voltage (MV) or high voltage (HV) electromagnetic induction device.
  • the cable may hence be a medium voltage or a high voltage cable.
  • electromagnetic induction devices are a transformer such as a power transformer, distribution transformer and current transformer, and a reactor.
  • the production methods presented herein are directed to the manufacturing of a cable that has a layer of magnetic material provided on its conductor.
  • This conductor may be comprised of a single strand or a plurality of strands forming a bundle of strands. In the former case, the single strand is provided with the layer of magnetic material.
  • each strand of the bundle of strands has been provided with a respective layer of magnetic material and/or the entire bundle of strands forming the conductor have been provided with a layer of magnetic material.
  • This layer of magnetic material may surround the entire conductor in the case of a single strand conductor, or it may only partly surround the conductor.
  • the conductor includes a bundle of strands, i.e. the layer of magnetic material may surround each strand or the layer may only partly surround the bundle of strands.
  • Additional insulation such as by means of a resin e.g. epoxy, enamel, and cellulose-based material such as paper may furthermore be provided around the single strand in the case of a single strand conductor, or around the bundle of strands in the case of a conductor comprising a bundle of strands.
  • the provision of the magnetic layer onto the single strand conductor, onto each strand if the conductor comprises a plurality of strands or onto the bundle of strands may be obtained in a multitude of ways. A number of examples will be described in the following with reference to Figs i-3b.
  • Fig. l shows a general flowchart of a method of manufacturing a cable for a winding of an electromagnetic induction device.
  • a conductor is provided with a layer of magnetic material.
  • the cable may comprise a conductor made of a single strand or a bundle of strands.
  • the conductor is formed by a single strand, this single strand is provided with the layer of magnetic material.
  • Step a) may involve providing the magnetic material onto the single strand by means of a cladding process.
  • the magnetic material may be pressed onto the strand by means of high pressure, e.g. by means of rolls, such that it adheres to the strand.
  • step a) may involve coating the strand with the magnetic material, or providing the magnetic material onto the strand in a film-formation process.
  • the coating may for example be made by
  • a resin such as epoxy may comprise the magnetic material e.g. in the form of magnetic particles dispersed therein.
  • the coating process may then involve coating the strand with the resin.
  • Another alternative to cladding and coating is that of providing a tape comprising the magnetic material onto the strand.
  • the tape may for example be provided in the axial direction onto the strand as strips parallel with the longitudinal direction of the strand.
  • the tape may be wound in several overlapping layers onto the strand, as shown in the example in Figs 3a-b.
  • Adhering means such as glue may be used to make the tape adhere to the strand.
  • the tape When the tape has been arranged on the strand, the tape may be annealed in an annealing process, if necessary, e.g. by heating the tape which is provided on the strand.
  • the tape may for instance be an amorphous tape or a non-grain oriented crystalline steel tape. Annealing is advantageously made in case the tape is an amorphous tape; if crystalline material is used, annealing may not be necessary.
  • a layer of magnetic material may first be provided onto the strand by means of the cladding process or by means of coating, wherein a tape comprising the magnetic material may be provided onto the strand which already has been provided with a layer of magnetic material.
  • the strand may be provided with more than one layers of magnetic material, e.g. two layers of magnetic material.
  • each conductor i.e. strand
  • step a) may be repeated until all strands have been provided with a layer of magnetic material.
  • step b) the strands may then be bundled to form a bundle of strands.
  • the strands may for example be bundled in such a way that they form a CTC.
  • the conductor may be formed by a bundle of strands, and the layer of magnetic material may be provided after the bundle of strands has been created.
  • step a) may involve winding a plurality of overlapping layers of tape comprising the magnetic material onto the bundle of strands.
  • the tape may be annealed if necessary, i.e. depending on the type of tape used. Examples of suitable tape are amorphous tape or non-grain oriented crystalline steel tape. The same considerations apply as above, i.e. in case the tape is an amorphous tape, annealing may be necessary, while in case the tape is a crystalline material, annealing may not be necessary.
  • step a) may involve coating the bundle of strands with the magnetic material or providing the magnetic material onto the bundle of strands in a film-formation process. The coating may for example be made by electroplating, spraying, physical vapour deposition, painting or varnishing.
  • the coating may involve coating the bundle of strands with epoxy comprising the magnetic material in the form of magnetic particles dispersed in the epoxy.
  • a step b') the conductor in the form of the bundle of strands may be provided with paper.
  • This step may hence be performed for any of the variations presented hereabove, i.e. for a bundle of strands where each strand individually has been provided with a layer of magnetic material, and for a bundle of strands provided with the layer of magnetic material after the strands have been bundled.
  • step b') may also be performed for the production of cables having single-strand conductors, i.e. for cables for which the conductor is made up of only one strand.
  • the paper is preferably wound around the bundle of strands or single strand.
  • the strands may for example be bundled in such a way as to form a CTC.
  • Fig. 2 shows a number of schematic flow schemes for example-manufacturing processes 1-4 for manufacturing a cable 3 for a winding of an electromagnetic induction device.
  • the figures show cross sections of the conductor/cable.
  • the process 1 flow scheme shows the manufacturing of a cable 3 which comprises a conductor 1 made of a single strand that is provided with a layer of magnetic material 2.
  • the solid conductor 1 without the layer of magnetic material is shows in a state A.
  • a state B the conductor 1 is shown provided with the layer of magnetic material 2.
  • a state C the conductor 1 already provided with the layer of magnetic material 2 has been coated with a resin layer 6 e.g. epoxy.
  • layers of paper 8 have been wound around the epoxy-coated conductor 1 thus forming the cable 3.
  • states A and B are the same as in process 1.
  • Each strand 7 is provided with a layer of magnetic material 2 in state B.
  • a plurality of strands 7 provided with a layer of magnetic material according to states A and B are arranged as a bundle of strands 9 in a state C
  • This bundle of strands 9 may then be coated with a resin 6 such as epoxy.
  • each strand 7 may be individually coated with the resin 6 wherein the bundle of strands 9 is formed after the resin-coating.
  • an electrical insulator such as enamel may be provided as electrical insulation in between the strands of the bundle of strands 9.
  • the bundle of strands 9 may be provided with one or more layers of paper 8 thus forming the cable 3 shown in state D'.
  • the paper may be provided for example by winding the paper around the bundle of strands 9.
  • states A and B are interchanged with states A' and B', respectively.
  • state A' a wire 5 that is to be shaped into a conductor 1 is provided.
  • the wire 5 may be subjected to a shaping process such as a drawing process or an extrusion process, in which the wire 5 additionally is provided with the layer of magnetic material 2 thus forming the conductor 1 in state B'.
  • a sheet comprising the magnetic material may be provided around the wire 5, wherein the wire 5 provided with the sheet of magnetic material is drawn through a die to form the conductor 1.
  • the conductor may be shaped from a wire by means of an extrusion process or a drawing process, wherein the layer of magnetic material is provided onto the conductor after the extrusion process or the drawing process, according to any example disclosed herein of how the layer of magnetic material is provided onto the conductor.
  • process 3 in Fig. 2 the process commences with states A' and B' and continues to states C and D' described hereabove.
  • State B in process 1 and 4 may for example be obtained according to the alternatives described herein, i.e. by means of cladding, coating or by providing a tape comprising the magnetic material onto the conductor/strand.
  • the dashed line 10 in Fig. 2 may be seen as a separator of step a) from additional steps to obtain the cable 3.
  • states A, B, A', B' correspond to step a) of the method of manufacturing the cable 3.
  • Fig. 3 shows an example of a cable 3 comprising a conductor 1 provided with a plurality of overlapping layers of magnetic material.
  • the conductor 1 may comprise one or more strands.
  • the conductor 1 is provided with a plurality of layers of magnetic material in the form of tape wound around the conductor 1.
  • the tape is arranged in an overlapping manner.
  • a plurality of overlapping layers of paper 8 is wound around the conductor 1 and around the magnetic material.
  • the overlaps of the paper 8 are illustrated by means of the dashed lines 11.
  • Fig- 3b shows a section along the axial direction 13 of the conductor 1 in Fig. 3a. According to this example there is a plurality of overlapping layers of magnetic material 2 in the form of tapes wound around the conductor 1.
  • the magnetic material may have a relative permeability in the range 2 to 100000.
  • relative permeability of the magnetic material is meant relative magnetic permeability ⁇ ⁇ of the magnetic material.
  • the relative permeability of the magnetic material is in the range of 10 to 500.
  • the relative permeability of the magnetic material is in the range 100-5000.
  • the relative permeability of the magnetic material may be greater than 300, and preferably above 500.
  • the layer may have a thickness which is at least 100 ⁇ , preferably in the range 200 to 800 ⁇ .
  • the conductivity of the magnetic material is according to one example relatively low, the conductivity being of an order of 10000 or less Siemens per meter.
  • the magnetic material has a Steinmetz coefficient having a value that is less than or equal to 20, preferably less than 10. Other variations of the magnetic material may exhibit a higher Steinmetz coefficient value than 20.
  • the magnetic material comprises an amorphous material.
  • the magnetic material may comprise a crystalline material.
  • the magnetic material may be ferromagnetic.
  • the magnetic material has a saturation flux density of at least 0.5 tesla.
  • the conductor may for example comprise copper, aluminium, a combination of copper and aluminium, or any other conductive material suitable for conducting current with low losses, and which conductive material has a lower relative magnetic permeability than the relative magnetic permeability of the magnetic material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'un câble pour un enroulement d'un dispositif à induction électromagnétique. Le procédé consiste a) à déposer une couche de matériau magnétique sur un conducteur. (Fig. 1)
PCT/EP2016/063239 2015-06-15 2016-06-10 Procédé de fabrication d'un câble pour un enroulement d'un dispositif à induction électromagnétique WO2016202686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562180046P 2015-06-15 2015-06-15
US62/180,046 2015-06-15

Publications (1)

Publication Number Publication Date
WO2016202686A1 true WO2016202686A1 (fr) 2016-12-22

Family

ID=56148368

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/063239 WO2016202686A1 (fr) 2015-06-15 2016-06-10 Procédé de fabrication d'un câble pour un enroulement d'un dispositif à induction électromagnétique

Country Status (1)

Country Link
WO (1) WO2016202686A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588853A (en) * 1968-03-25 1971-06-28 Bell Telephone Labor Inc Magnetic wire
US5262592A (en) * 1991-02-19 1993-11-16 Champlain Cable Corporation Filter line cable featuring conductive fiber shielding
US20140035712A1 (en) * 2011-04-07 2014-02-06 Christer Thornkvist Cable And Electromagnetic Device Comprising The Same
WO2015046153A1 (fr) * 2013-09-25 2015-04-02 株式会社フジクラ Câble haute fréquence et bobine haute fréquence

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3588853A (en) * 1968-03-25 1971-06-28 Bell Telephone Labor Inc Magnetic wire
US5262592A (en) * 1991-02-19 1993-11-16 Champlain Cable Corporation Filter line cable featuring conductive fiber shielding
US20140035712A1 (en) * 2011-04-07 2014-02-06 Christer Thornkvist Cable And Electromagnetic Device Comprising The Same
EP2695174A1 (fr) 2011-04-07 2014-02-12 ABB Research Ltd. Câble et dispositif électromagnétique comprenant ce dernier
WO2015046153A1 (fr) * 2013-09-25 2015-04-02 株式会社フジクラ Câble haute fréquence et bobine haute fréquence
EP3051539A1 (fr) * 2013-09-25 2016-08-03 Fujikura Ltd. Câble haute fréquence et bobine haute fréquence

Similar Documents

Publication Publication Date Title
EP2695174B1 (fr) Câble et dispositif électromagnétique comprenant ce dernier
US9263181B2 (en) Multi-phase transformer and transformation system
WO2011118054A1 (fr) Fil électrique à haute fréquence et bobine à haute fréquence
JP2011124129A (ja) 高周波用の電線
JP2018085911A (ja) ステータ
US20180182507A1 (en) Continuously Transposed Conductors And Assemblies
CN107039159A (zh) 电绕组、具有电绕组的干式变压器和制造电绕组的方法
US10510464B1 (en) Continuously transposed conductors and assemblies
US9330834B2 (en) Reactor
CN201402642Y (zh) 诺梅克斯绝缘组合换位导线
JP2007281131A (ja) 樹脂モールドコイル
JP2012119617A (ja) リアクトル
US20150243409A1 (en) Insulated winding wire containing semi-conductive layers
WO2016202686A1 (fr) Procédé de fabrication d'un câble pour un enroulement d'un dispositif à induction électromagnétique
CN201629202U (zh) 并联复合换位导线
JP7146449B2 (ja) 高周波コイル用電線及びコイル
US10964471B2 (en) High voltage cable for a winding and electromagnetic induction device comprising the same
CN101901641A (zh) 优化的绞合线
JP2016157915A (ja) 巻線の渦電流損失が低減される変圧器
RU198445U1 (ru) Комбинированная обмотка индукционного устройства
CN201725612U (zh) 聚酯网包换位导线
JP2009065045A (ja) 金属線を密着整列した線束及びその製造法
CN203377061U (zh) 单相铁硅铝磁芯谐波电抗器
CN102376387A (zh) 聚酯网包换位导线
CN115528505A (zh) 一种辐向组合导线与轴向组合导线的焊接方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16730769

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16730769

Country of ref document: EP

Kind code of ref document: A1