WO2019219226A1 - Transposed cable and winding comprising said transposed cable - Google Patents

Transposed cable and winding comprising said transposed cable Download PDF

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Publication number
WO2019219226A1
WO2019219226A1 PCT/EP2018/080157 EP2018080157W WO2019219226A1 WO 2019219226 A1 WO2019219226 A1 WO 2019219226A1 EP 2018080157 W EP2018080157 W EP 2018080157W WO 2019219226 A1 WO2019219226 A1 WO 2019219226A1
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WO
WIPO (PCT)
Prior art keywords
continuously transposed
transposed cable
cable
blocks
stack
Prior art date
Application number
PCT/EP2018/080157
Other languages
French (fr)
Inventor
Paolo Pavanello
Gianluca BUSTREO
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 WO2019219226A1 publication Critical patent/WO2019219226A1/en

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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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
    • 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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • 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 present invention relates to a transposed cable, commonly also referred to as a “continuously transposed conductor” (CTC), in particular for producing a winding of an electromagnetic induction device, such as a transformer.
  • CTC continuously transposed conductor
  • transformers With reference, for example, to transformers, they comprise windings produced according to different methods (for example, there are known disc windings, helical windings, etc.). Windings have axial and radial channels, necessary for the passage of oil for cooling the winding itself. During formation of the windings, the axial channels are produced by inserting spacers having longitudinal blocks that delimit the desired channels.
  • radial channels are produced by inserting radial blocks into the already formed windings.
  • the radial blocks are positioned so as to form and laterally delimit the desired radial channels.
  • the object of the present invention is to provide a cable that, used for the production of windings, simplifies production of the radial channels.
  • Fig. 1 is a perspective view of a continuously transposed cable according to a possible embodiment of the present invention
  • Fig. 2 is a perspective view of a segment of turn of a winding produced by means of the continuously transposed cable according to an embodiment of the invention.
  • a continuously transposed cable (CTC) is denoted as a whole with the reference numeral 1 .
  • the continuously transposed cable 1 extends as a whole according to a longitudinal extension direction L and comprises two opposite longitudinal ends 2 and 3.
  • the continuously transposed cable 1 comprises a plurality of individual conductors 4, preferably ribbon shaped, i.e., with a roughly rectangular cross section with a first dimension larger than a second dimension.
  • the individual conductors 4 are externally at least in part electrically insulated, for example by means of an insulating enamel.
  • the individual conductors 4 are arranged so as to form at least a first 5 and a second 6 stack placed side-by-side, each stack extending along the longitudinal direction L and comprising a plurality of the aforesaid conductors 4 superimposed according to a stacking direction I. Moreover, the conductors 4 are preferably arranged so that at least a portion of each of them alternates between the two stacks 5, 6 placed side-by-side. Preferably, the conductors 4 are arranged so that each of them, along its extension in longitudinal direction L, alternately occupies every possible cross section position of the cable 1 , i.e., every position along the stacking direction in each of the stacks 5, 6.
  • the smaller dimension of the section of each individual conductor is arranged parallel to the stacking direction I, while the larger dimension is arranged parallel to the direction of lateral extension W of the cable 1 .
  • the direction of lateral extension W is a direction orthogonal to a plane formed by the longitudinal direction L and by the stacking direction I.
  • the so configured conductors 4 are held together by means of specific connection members, for example by means of electrically insulating tapes 14, for example paper tapes, plastic filaments or another type of insulating material.
  • electrically insulating tapes 14 for example paper tapes, plastic filaments or another type of insulating material.
  • the conductors 4 are electrically connected to one another in parallel at the longitudinal ends 2, 3 of the continuously transposed cable 1 .
  • an insulating separator 7 can be arranged, for example a paper strip. This extends in length along the longitudinal extension direction L and in width according to the stacking direction I.
  • the so structured continuously transposed cable 1 comprises, in addition to the aforesaid longitudinal ends 2, 3, a first lateral face 8, a second lateral face 9, an upper face 10, and a lower face 1 1 .
  • the first lateral face 8 of the cable 1 is the outer face of the first stack 5 opposite the inner face thereof facing the second stack 6.
  • the second lateral face 8 of the cable 1 is the outer face of the second stack 6 opposite the inner face thereof facing the first stack 5.
  • the upper 10 and lower 1 1 faces are the remaining faces of the continuously transposed cable 1 and correspond to the upper and lower portions of the pair of stacks 5, 6, respectively, placed side-by-side.
  • the conductor 1 comprises a plurality of electrically insulating blocks 12 arranged on the first 8 and/or on the second 9 lateral face of the continuously transposed cable 1 and fixed to these faces.
  • the blocks 12 extend longitudinally according to a longitudinal direction of block B, and are preferably arranged so that this direction is parallel to the stacking direction I of the cable 1 .
  • the blocks 12 are structured roughly as parallelepipeds also having a length I, preferably parallel to the longitudinal extension direction L of the cable 1 , and a height h, preferably parallel to the direction of lateral extension W of the cable 1 .
  • the blocks 12 produce thicknesses projecting on the first 8 and/or on the second 9 lateral face from the continuously transposed cable 1 and also delimit on these faces empty spaces 13 that alternate with the blocks 12 along the longitudinal direction L of the cable 1 and that also extend according to the stacking direction I.
  • the blocks 12, for example, can be made of a polymer material. They can be blocked to the cable 1 , for example, by gluing, or by applying an insulating tape (not shown in the figures) wound around the cable 1 at the blocks 12.
  • the so structured continuously transposed cable 1 can be used to produce a winding 100 of an electromagnetic induction device, for example a transformer.
  • the continuously transposed cable 1 is wound to form a plurality of overlapping turns, each arranged circumferentially around a direction D of axial extension of the winding.
  • the cable 1 is wound so that:
  • the longitudinal extension direction L of the cable 1 is arranged according to the circumferential direction of each turn;
  • the stacking direction I of the cable takes a radial positioning relative to the direction D of axial extension of the winding.
  • the blocks 12 will be arranged so that their longitudinal dimension B is arranged in the radial or roughly radial direction of the turn.
  • the cable 1 comprises the blocks 12 positioned only on the first lateral face 8
  • the blocks 12 of each turn will be arranged between the first lateral face 8 (to which they are fixed) of a turn and the second lateral face 9 of the subsequent turn.
  • Their height h will be roughly parallel to the axial direction D of the winding 100 and therefore the turns will be spaced from one another along the direction D by a space equal to the height h of the blocks 12.
  • the spaces 13 of the cable 1 following winding thereof, will produce radial or roughly radial channels in the winding 100 between each subsequent turn.
  • Any axial channels in the winding 100 can be produced with known methods.
  • the continuously transposed cable according to the present invention being provided with the pre installed blocks 12, allows radial channels to be formed in the winding during the formation thereof, without requiring particular operations subsequently to winding for their production.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • Electric Cable Arrangement Between Relatively Moving Parts (AREA)

Abstract

A continuously transposed cable (1) extending longitudinally according to a longitudinal extension direction (L) comprises a plurality of individual conductors (4) arranged so as to form at least a first (5) and a second (6) stack of conductors superimposed according to a stacking direction (I) placed side-by-side, wherein the first stack (5) comprises an outer face, opposite an inner face facing the second stack (6), which defines a first lateral face (8) of the continuously transposed cable (1), and the second stack (6) comprises an outer face, opposite an inner face facing the first stack (5), which defines a second lateral face (9) of the continuously transposed cable (1). The continuously transposed cable (1) further comprises a plurality of electrically insulating blocks (12) fixed to the continuously transposed cable on the first (8) and/or on the second (9) lateral face, wherein the blocks (12) delimit on these faces empty spaces (13) that are alternated with the blocks (12) along the longitudinal direction (L) of the cable (1 ).

Description

TRANSPOSED CABLE AND WINDING COMPRISING SAID TRANSPOSED CABLE
The present invention relates to a transposed cable, commonly also referred to as a “continuously transposed conductor” (CTC), in particular for producing a winding of an electromagnetic induction device, such as a transformer.
With reference, for example, to transformers, they comprise windings produced according to different methods (for example, there are known disc windings, helical windings, etc.). Windings have axial and radial channels, necessary for the passage of oil for cooling the winding itself. During formation of the windings, the axial channels are produced by inserting spacers having longitudinal blocks that delimit the desired channels.
Instead, radial channels are produced by inserting radial blocks into the already formed windings. The radial blocks are positioned so as to form and laterally delimit the desired radial channels.
Performing this operation during production of the winding is however difficult and onerous.
Therefore, the object of the present invention is to provide a cable that, used for the production of windings, simplifies production of the radial channels.
This and other objects are obtained by a continuously transposed cable according to claim 1 .
To better understand the present invention and appreciate its advantages, some non limiting embodiments thereof will be described below by way of example, with reference to the accompanying figures, wherein:
Fig. 1 is a perspective view of a continuously transposed cable according to a possible embodiment of the present invention;
Fig. 2 is a perspective view of a segment of turn of a winding produced by means of the continuously transposed cable according to an embodiment of the invention.
With reference to the accompanying figures, a continuously transposed cable (CTC) is denoted as a whole with the reference numeral 1 . The continuously transposed cable 1 extends as a whole according to a longitudinal extension direction L and comprises two opposite longitudinal ends 2 and 3.
The continuously transposed cable 1 comprises a plurality of individual conductors 4, preferably ribbon shaped, i.e., with a roughly rectangular cross section with a first dimension larger than a second dimension. Preferably, the individual conductors 4 are externally at least in part electrically insulated, for example by means of an insulating enamel.
The individual conductors 4 are arranged so as to form at least a first 5 and a second 6 stack placed side-by-side, each stack extending along the longitudinal direction L and comprising a plurality of the aforesaid conductors 4 superimposed according to a stacking direction I. Moreover, the conductors 4 are preferably arranged so that at least a portion of each of them alternates between the two stacks 5, 6 placed side-by-side. Preferably, the conductors 4 are arranged so that each of them, along its extension in longitudinal direction L, alternately occupies every possible cross section position of the cable 1 , i.e., every position along the stacking direction in each of the stacks 5, 6. Preferably, in the case of conductors with a rectangular section, the smaller dimension of the section of each individual conductor is arranged parallel to the stacking direction I, while the larger dimension is arranged parallel to the direction of lateral extension W of the cable 1 . The direction of lateral extension W is a direction orthogonal to a plane formed by the longitudinal direction L and by the stacking direction I.
Preferably, the so configured conductors 4 are held together by means of specific connection members, for example by means of electrically insulating tapes 14, for example paper tapes, plastic filaments or another type of insulating material.
Preferably, the conductors 4 are electrically connected to one another in parallel at the longitudinal ends 2, 3 of the continuously transposed cable 1 .
According to an embodiment, between the first 5 and the second 6 stack an insulating separator 7 can be arranged, for example a paper strip. This extends in length along the longitudinal extension direction L and in width according to the stacking direction I.
The so structured continuously transposed cable 1 comprises, in addition to the aforesaid longitudinal ends 2, 3, a first lateral face 8, a second lateral face 9, an upper face 10, and a lower face 1 1 . The first lateral face 8 of the cable 1 is the outer face of the first stack 5 opposite the inner face thereof facing the second stack 6. The second lateral face 8 of the cable 1 is the outer face of the second stack 6 opposite the inner face thereof facing the first stack 5. The upper 10 and lower 1 1 faces are the remaining faces of the continuously transposed cable 1 and correspond to the upper and lower portions of the pair of stacks 5, 6, respectively, placed side-by-side.
The conductor 1 comprises a plurality of electrically insulating blocks 12 arranged on the first 8 and/or on the second 9 lateral face of the continuously transposed cable 1 and fixed to these faces.
The blocks 12 extend longitudinally according to a longitudinal direction of block B, and are preferably arranged so that this direction is parallel to the stacking direction I of the cable 1 . According to a possible embodiment, the blocks 12 are structured roughly as parallelepipeds also having a length I, preferably parallel to the longitudinal extension direction L of the cable 1 , and a height h, preferably parallel to the direction of lateral extension W of the cable 1 . In this way, the blocks 12 produce thicknesses projecting on the first 8 and/or on the second 9 lateral face from the continuously transposed cable 1 and also delimit on these faces empty spaces 13 that alternate with the blocks 12 along the longitudinal direction L of the cable 1 and that also extend according to the stacking direction I.
The blocks 12, for example, can be made of a polymer material. They can be blocked to the cable 1 , for example, by gluing, or by applying an insulating tape (not shown in the figures) wound around the cable 1 at the blocks 12.
The so structured continuously transposed cable 1 can be used to produce a winding 100 of an electromagnetic induction device, for example a transformer.
In the winding, the continuously transposed cable 1 is wound to form a plurality of overlapping turns, each arranged circumferentially around a direction D of axial extension of the winding. In particular, the cable 1 is wound so that:
- the longitudinal extension direction L of the cable 1 is arranged according to the circumferential direction of each turn;
- the stacking direction I of the cable takes a radial positioning relative to the direction D of axial extension of the winding.
Consequently, the blocks 12 will be arranged so that their longitudinal dimension B is arranged in the radial or roughly radial direction of the turn.
With reference to the case in which, for example, the cable 1 comprises the blocks 12 positioned only on the first lateral face 8, as a result of winding of the continuously transposed cable 1 around the axial direction D of the winding 100, the blocks 12 of each turn will be arranged between the first lateral face 8 (to which they are fixed) of a turn and the second lateral face 9 of the subsequent turn. Their height h will be roughly parallel to the axial direction D of the winding 100 and therefore the turns will be spaced from one another along the direction D by a space equal to the height h of the blocks 12.
The spaces 13 of the cable 1 , following winding thereof, will produce radial or roughly radial channels in the winding 100 between each subsequent turn.
Any axial channels in the winding 100 can be produced with known methods.
From the description above, the person skilled in the art can appreciate how the continuously transposed cable according to the present invention, being provided with the pre installed blocks 12, allows radial channels to be formed in the winding during the formation thereof, without requiring particular operations subsequently to winding for their production.
In order to satisfy specific contingent needs, the person skilled in the art may make numerous additions or changes to the described embodiments of the continuously transposed cable according to the present invention, or may substitute the elements thereof with other functionally equivalent elements, without however departing from scope of the appended claims.

Claims

1. A continuously transposed cable (1 ) extending longitudinally according to a longitudinal extension direction (L), comprising a plurality of individual conductors (4) arranged so as to form at least a first (5) and a second (6) stack of conductors superimposed according to a stacking direction (I) side-by-side with one another, wherein the first stack (5) comprises an outer face, opposite an inner face facing the second stack (6), which defines a first lateral face (8) of the continuously transposed cable (1 ), and the second stack (6) comprises an outer face, opposite an inner face facing the first stack (5), which defines a second lateral face (9) of the continuously transposed cable (1 ), characterized in that it further comprises a plurality of electrically insulating blocks (12) fixed to the continuously transposed cable on the first (8) and/or on the second (9) lateral face, wherein the blocks (12) delimit on the faces empty spaces (13) that are alternated with the blocks (12) along the longitudinal direction (L) of the cable (1 ).
2. The continuously transposed cable (1 ) according to claim 1 , wherein said blocks (12) extend longitudinally according to a longitudinal direction of block (B) parallel to the stacking direction (I) of the conductors (4) in the stacks (2,3).
3. The continuously transposed cable (1 ) according to claim 2, wherein said blocks (12) are substantially configured as parallelepipeds having a width (I) parallel to the longitudinal extension direction (L) of the continuously transposed cable (1 ) and a height (h) perpendicular to a plane formed by said longitudinal extension direction (L) of the continuously transposed cable (1 ) and said stacking direction (I).
4. The continuously transposed cable (1 ) according to any one of the preceding claims, wherein said blocks (12) are made of a polymer material.
5. The continuously transposed cable (1 ) according to any one of claims 1 to 4, wherein said blocks (12) are fixed to the continuously transposed cable (1 ) by gluing.
6. The continuously transposed cable (1 ) according to any one of claims 1 to 4, wherein said blocks (12) are fixed to the continuously transposed cable (1 ) by means of an insulating tape wound around the continuously transposed cable (1 ) at the blocks (12).
7. The continuously transposed cable (1 ) according to any one of the preceding claims, wherein said individual conductors (4) are arranged so that at least a portion of each of them alternates between said first and second stack (5, 6) placed side-by-side.
8. The continuously transposed cable (1 ) according to any one of the preceding claims, wherein said individual conductors (4) are arranged so that each of them alternately occupies every possible cross section position of the continuously transposed cable (1 ) along the whole longitudinal extension.
9. The continuously transposed cable (1 ) according to any one of the preceding claims, wherein said individual conductors (4) are ribbon shaped with a roughly rectangular cross section with a first dimension greater than a second dimension.
10. The continuously transposed cable (1 ) according to any one of the preceding claims, wherein said individual conductors (4) are externally at least in part electrically insulated.
11. Continuously transposed cable (1 ) according to any one of the preceding claims, comprising an insulating separator (7) placed between said first (5) and second (6) stack.
12. A winding (100) of an electromagnetic induction device comprising at least one continuously transposed cable (1 ) according to any one of the preceding claims, wherein said at least one continuously transposed cable (1 ) is wound to form a plurality of overlapping turns, each arranged circumferentially around a direction (D) of axial extension of the winding (100) so that:
- the longitudinal extension direction (L) of the continuously transposed cable (1 ) is arranged according to the circumferential direction of each turn;
- the stacking direction (I) of the continuously transposed cable (1 ) is radial relative to the direction (D) of axial extension of the winding;
- the blocks (12) form spacers and the spaces (13) delimited by the blocks (12) form channels in the winding (100) between each subsequent turn.
13. An electromagnetic induction device comprising at least one winding (100) according to the preceding claim.
14. The electromagnetic induction device according to the preceding claim, wherein said electromagnetic induction device is a transformer.
PCT/EP2018/080157 2018-05-17 2018-11-05 Transposed cable and winding comprising said transposed cable WO2019219226A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT202018000002572 2018-05-17
IT202018000002572U IT201800002572U1 (en) 2018-05-17 2018-05-17 Transposed cable and winding made by means of said transposed cable

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WO2019219226A1 true WO2019219226A1 (en) 2019-11-21

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WO (1) WO2019219226A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839987A1 (en) * 2019-12-18 2021-06-23 ABB Power Grids Switzerland AG Method and conductor structure for manufacturing an electric winding of an electromagnetic induction apparatus
WO2021151878A1 (en) 2020-01-30 2021-08-05 Abb Power Grids Switzerland Ag Method and conductor structure for manufacturing an electric winding of an electromagnetic induction apparatus
CN114175192A (en) * 2020-01-30 2022-03-11 日立能源瑞士股份公司 Method and conductor structure for producing an electrical winding of an electromagnetic induction device
CN116072399A (en) * 2023-03-02 2023-05-05 沈阳宏远电磁线股份有限公司 Semi-hard transposed conductor based on self-adhesive insulating material and preparation method thereof

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CN205122221U (en) * 2015-08-07 2016-03-30 阿斯塔导线有限公司 Low epoxy axial oil duct net package transposed conductor
EP3116000A1 (en) * 2015-06-18 2017-01-11 LSIS Co., Ltd. Cooling device of power transformer
CN106531298A (en) * 2017-01-16 2017-03-22 无锡统力电工股份有限公司 Transposed conductor processed from thin film enameled rectangular wires and fabrication method of transposed conductor

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EP3116000A1 (en) * 2015-06-18 2017-01-11 LSIS Co., Ltd. Cooling device of power transformer
CN205122221U (en) * 2015-08-07 2016-03-30 阿斯塔导线有限公司 Low epoxy axial oil duct net package transposed conductor
CN106531298A (en) * 2017-01-16 2017-03-22 无锡统力电工股份有限公司 Transposed conductor processed from thin film enameled rectangular wires and fabrication method of transposed conductor

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DE ANGELI: "CONTINUOUSLY TRANSPOSED CABLE", 31 May 2011 (2011-05-31), XP055542463, Retrieved from the Internet <URL:http://grandvoltage.ro/download_file/catalogs/Continuously%20Transposed%20Cable.pdf> [retrieved on 20190115] *
STEFAN BECKMÖLLER: "TRANSFORM Partner WIRES AND TRANSPOSED CABLES IN TRANSFORMERS", 6 June 2013 (2013-06-06), pages 1 - 39, XP055421454, Retrieved from the Internet <URL:www.highvolt.de/XparoDownload.ashx?raid=52999> [retrieved on 20171102] *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839987A1 (en) * 2019-12-18 2021-06-23 ABB Power Grids Switzerland AG Method and conductor structure for manufacturing an electric winding of an electromagnetic induction apparatus
WO2021151878A1 (en) 2020-01-30 2021-08-05 Abb Power Grids Switzerland Ag Method and conductor structure for manufacturing an electric winding of an electromagnetic induction apparatus
CN114175192A (en) * 2020-01-30 2022-03-11 日立能源瑞士股份公司 Method and conductor structure for producing an electrical winding of an electromagnetic induction device
US11657961B2 (en) 2020-01-30 2023-05-23 Hitachi Energy Switzerland Ag Method and conductor structure for manufacturing an electric winding of an electromagnetic induction apparatus
CN116072399A (en) * 2023-03-02 2023-05-05 沈阳宏远电磁线股份有限公司 Semi-hard transposed conductor based on self-adhesive insulating material and preparation method thereof
CN116072399B (en) * 2023-03-02 2023-08-15 沈阳宏远电磁线股份有限公司 Semi-hard transposed conductor based on self-adhesive insulating material and preparation method thereof

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