EP0170170B1 - Enroulement en couches pour transformateurs - Google Patents

Enroulement en couches pour transformateurs Download PDF

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Publication number
EP0170170B1
EP0170170B1 EP85109066A EP85109066A EP0170170B1 EP 0170170 B1 EP0170170 B1 EP 0170170B1 EP 85109066 A EP85109066 A EP 85109066A EP 85109066 A EP85109066 A EP 85109066A EP 0170170 B1 EP0170170 B1 EP 0170170B1
Authority
EP
European Patent Office
Prior art keywords
winding
layer
lead
region
insulating wall
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
Application number
EP85109066A
Other languages
German (de)
English (en)
Other versions
EP0170170A1 (fr
Inventor
Herbert Mössinger
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Priority to AT85109066T priority Critical patent/ATE30650T1/de
Publication of EP0170170A1 publication Critical patent/EP0170170A1/fr
Application granted granted Critical
Publication of EP0170170B1 publication Critical patent/EP0170170B1/fr
Expired legal-status Critical Current

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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
    • H01F27/2828—Construction of conductive connections, of leads
    • 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

Definitions

  • the invention relates to a layer winding for transformers with end-side, additional insulation for winding conductor insulation having rejections from winding layers flanked radially on both sides by further winding layers and with cooling channels separated between the winding layers by an insulating wall and kept open radially one above the other by spacer strips.
  • thicker spacer strips or oil channel strips adapted to the dimensions of the diversions have usually been provided on the entire winding circumference in order to lead out the reinforced insulated leads, in particular from inner winding layers, in order to ensure a sufficient flow of cooling oil.
  • the use of the thicker spacer bars causes diameter increases on the winding structure and thus weight increases with the consequence of an increased material consumption and with increasing transport dimensions.
  • the invention is therefore based on the object to improve the structure of layer windings of the type mentioned in such a way that the cross-sectional area claimed by the winding becomes smaller than in the previously conventional structure, but the safe dissipation of the heat losses generated from the winding must also be ensured like the circular cross-sectional shape of the individual winding layers which is essential for the short-circuit strength.
  • Expedient embodiments of the invention consist in that the insulating walls are curved in the same direction at every point of the diversion area as in the normal circumferential area and that the additional insulation of each of the diversions is continued in the circumferential direction over two or more spacer strips on the first turn of the winding layer and that the deviations from the circular shape in the cross section of the insulating walls, including the transition zones, extend over several spacer strips in the circumferential direction of the winding.
  • the insulating walls consist of paper webs which are wound onto one another and glued to one another point by point, one end of each spacer strip is glued to the adjacent insulating wall, and the additional insulation of the leads is more elastic in itself than the insulating walls and the winding layers.
  • the winding structure according to the invention is very advantageous because, by not having to reinforce the cooling channels flanking the winding layers with leads, it leads to a smaller overall cross-section of the winding arrangement and thus also to smaller overall dimensions of the transformer, and because the winding arrangement according to the invention also surprisingly ensures compliance with the short-circuit voltage is advantageously influenced.
  • Radially above the winding layer 1 are connected, for example, with diverters, not shown Winding layers 2 and 3.
  • an insulating wall 4 is provided in each case, which separates axially parallel cooling channels 5 from one another.
  • the cooling channels 5 are kept open by spacer strips 7.
  • the winding conductor ends of the last turn of each of the winding layers 1, 2 and 3 are led out of the winding arrangement in the form of axles 8.
  • the leads 8 carry an additional insulation 9 above the normal winding conductor insulation, which is usually designed for the full rated voltage of the transformer.
  • the additional insulation 9 extends into the respective end turn of the associated winding layer 1, 2 or 3 and is held there by, for example, three pairs of spacer strips 7.
  • the thickness of the additional insulation 9 is at nominal voltages from 200 kV in the order of magnitude of the thickness of the spacer strips 7, so that the exit of the cooling channels 5 in the area of the diversion 8 would be practically closed without special measures in the region of the diversion 8 via approximately two or more sectors formed by spacer strips 7.
  • the aim is to maintain the circular cross-sectional shape.
  • the spacer strips 7 have so far been made reinforced over the entire winding circumference wherever they clamp a winding layer provided with a lead-out 8.
  • the special spacer strips 7 ' are now reinforced, which abut one end of an additional insulation 9.
  • These reinforced special spacer strips 7 ' have a shoulder 6 at their end abutting the additional insulation 9, by means of which they are adapted to the additional insulation 9 protruding into the cooling channel 5.
  • the special spacer strips 7 'which are supported on the reinforced special spacer strips 7' via the insulating wall 4 are designed to be correspondingly weaker than the spacer strips 7 in the normal circumferential range.
  • the special spacer strips 7 ' are optionally also made in different thicknesses within the diversion area.
  • This variation in the thickness of the special spacer strips 7 'maintains the annular cross section for the winding layers 1, 2 and 3, but abandons them for the insulating walls 4 which bulge from the respective winding layer 1, 2 or 3 in the area of the outlets 8.
  • This arrangement therefore makes it possible to maintain the normal layer spacing even for winding layers with reinforced insulated leads 8 and thus ensures very good use of space.
  • this arrangement surprisingly also has a very advantageous influence on the short-circuit voltage.

Landscapes

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

Claims (6)

1. Enroulement en couches pour transformateurs comportant des conducteurs de sortie (8) possédant un isolant supplémentaire (9) servant à isoler le conducteur d'enroulement, et constitués par des couches d'enroulement (1, 2, 3) flanquées radialement, sur leurs deux faces, par d'autres couches d'enroulement, et comportant des canaux de refroidissement (5) qui sont superposés radialement, sont séparés les uns des autres par une paroi isolante (4) entre les couches d'enroulement (1, 2, 3) et sont maintenus ouverts par des entretoises (7),
caractérisé par le fait
- que les parois isolantes (4), qui flanquent chaque conducteur extérieur (8), sont cintrées radialement vers l'intérieur ou vers l'extérieur sur toute leur longueur axiale par des entretoises particulières (7') de manière à s'écarter, dans la zone de ce conducteur de sortie (8), de la couche d'enroulement (1, 2, 3) portant ce conducteur,
- que de ce fait, contrairement à la couche d'enroulement (1, 2 ou 3) qui conserve une section transversale en forme d'anneau circulaire, les parois isolantes (4) ont une section transversale qui diffère de leur section transversale qui par ailleurs est également en forme d'anneau circulaire,
- que la plus petite distance entre la paroi isolante (4) et l'isolant supplémentaire (9) du conducteur extérieur (8) est en général inférieure, dans la zone de cet isolant supplémentaire, à l'écartement entre la paroi isolante (4) et la couche d'enroulement voisine (1, 2 ou 3) dans cette zone, mais est égale au moins à la moitié de l'écartement entre la paroi isolante (4) et la couche d'enroulement voisine (1, 2 ou 3) à l'extérieur de cette zone, et
- que la somme de l'épaisseur radiale, correspondant à cet écartement, des entretoises (7, 7') flanquant intérieurement et extérieurement cette même paroi isolante (4), possède la même valeur dans la zone circonférentielle normale et dans la zone du conducteur extérieur, l'épaisseur des entretoises particulières (7') plus épaisses étant réduite de l'épaisseur de l'isolant supplémentaire (9), au niveau de leur extrémité appliquée contre l'isolant supplémentaire (9) du conducteur de sortie (8).
2. Enroulement en couches suivant la revendication 1, caractérisé par le fait que les parois isolantes (4) sont également cintrées, en tout point de la zone du conducteur de sortie, dans la même direction que dans la zone circonférentielle normale.
3. Enroulement en couches suivant les revendications 1 et 2, caractérisé par le fait que l'isolant supplémentaire (9) de chacun des conducteurs de sortie (8) se prolonge, respectivement sur deux ou plusieurs entretoises particulières (7'), dans la direction circonférentielle sur la première spire de la couche d'enroulement (1, 2, 3) et que les variations, par rapport à la section transversale de forme circulaire, des parois isolantes (4) ainsi que des zones de jonction s'étendent pour chaque conducteur de sortie sur plusieurs entretoises particulières (7') dans la direction circonférentielle.
4. Enroulement en couches suivant les revendications 1 à 3, caractérisé par le fait que les parois isolantes (4) sont constituées par des bandes de papier enroulées de façon superposée et collées entre elles au niveau de points.
5. Enroulement en couches suivant les revendications 1 à 4, caractérisé par le fait qu'une extrémité respective de chaque entretoise (7, 7') est collée à la paroi isolante contiguë (4).
6. Enroulement en couche suivant les revendications 1 à 5, caractérisé par le fait que l'isolant supplémentaire (9) des conducteurs de sortie (8) est en soi plus élastique que les parois isolantes (4) et les couches d'enroulement (1, 2, 3).
EP85109066A 1984-08-02 1985-07-19 Enroulement en couches pour transformateurs Expired EP0170170B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85109066T ATE30650T1 (de) 1984-08-02 1985-07-19 Lagenwicklung fuer transformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3428613 1984-08-02
DE19843428613 DE3428613A1 (de) 1984-08-02 1984-08-02 Lagenwicklung fuer transformatoren

Publications (2)

Publication Number Publication Date
EP0170170A1 EP0170170A1 (fr) 1986-02-05
EP0170170B1 true EP0170170B1 (fr) 1987-11-04

Family

ID=6242255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85109066A Expired EP0170170B1 (fr) 1984-08-02 1985-07-19 Enroulement en couches pour transformateurs

Country Status (4)

Country Link
EP (1) EP0170170B1 (fr)
AT (1) ATE30650T1 (fr)
BR (1) BR8503642A (fr)
DE (2) DE3428613A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK64690D0 (da) * 1990-03-12 1990-03-12 Ntp Elektronik A S Omkoblingssystem
EP2472533A1 (fr) * 2011-01-04 2012-07-04 ABB Technology AG Enroulement de transformateur doté d'un canal de refroidissement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2246398C3 (de) * 1972-09-21 1978-06-22 Transformatoren Union Ag, 7000 Stuttgart Oberspannungsstammlagenwicklung hoher Spannung für Transformatoren, Drosselspulen u.dgl
DE2361220C3 (de) * 1973-12-08 1979-01-25 Transformatoren Union Ag, 7000 Stuttgart Isolieranordnung für Ausleitungen von Hochspannungswicklungen in T ransformatoren und Drosseln
DE3035262C2 (de) * 1980-09-18 1983-09-22 Transformatoren Union Ag, 7000 Stuttgart Wicklung für Transformatoren mit großer Nennleistung
DE3101217C2 (de) * 1981-01-16 1984-08-23 Smit Transformatoren B.V., Nijmegen Wicklung für einen Trockentransformator mit Abstandshalteanordnung

Also Published As

Publication number Publication date
ATE30650T1 (de) 1987-11-15
DE3428613A1 (de) 1986-02-13
EP0170170A1 (fr) 1986-02-05
DE3560927D1 (en) 1987-12-10
BR8503642A (pt) 1986-05-06

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