EP0014418B1 - Enroulement pour un transformateur à sec refroidi par air - Google Patents

Enroulement pour un transformateur à sec refroidi par air Download PDF

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Publication number
EP0014418B1
EP0014418B1 EP80100436A EP80100436A EP0014418B1 EP 0014418 B1 EP0014418 B1 EP 0014418B1 EP 80100436 A EP80100436 A EP 80100436A EP 80100436 A EP80100436 A EP 80100436A EP 0014418 B1 EP0014418 B1 EP 0014418B1
Authority
EP
European Patent Office
Prior art keywords
winding
layer
sections
axial length
layers
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
EP80100436A
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German (de)
English (en)
Other versions
EP0014418B2 (fr
EP0014418A1 (fr
Inventor
Gerrit Bijlsma
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.)
Holec Systemen en Componenten BV
Original Assignee
Smit Transformatoren BV
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6062448&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0014418(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Smit Transformatoren BV filed Critical Smit Transformatoren BV
Priority to AT80100436T priority Critical patent/ATE442T1/de
Publication of EP0014418A1 publication Critical patent/EP0014418A1/fr
Application granted granted Critical
Publication of EP0014418B1 publication Critical patent/EP0014418B1/fr
Publication of EP0014418B2 publication Critical patent/EP0014418B2/fr
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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
    • 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

Definitions

  • the figure also shows that the voltage difference between the winding layers on the side facing away from the electrical connection can assume considerable values.
  • the transformer manufacturer is aware that due to the electrical stress, a sufficient safety distance must be maintained between the windings to be insulated from one another in adjacent winding layers.
  • the originally high insulation values decrease with advancing age of the transformer, which can be caused in part by contamination, material fatigue or change or crack formation. In particular, the formation of leakage current paths can be observed.
  • the transformer designer When designing the construction, the transformer designer will keep in mind that very high-quality, high-purity insulating material that is used for the spacer elements is generally very aging-resistant. However, this material is often very expensive and is preferably replaced by less material, which, however, has less high dielectric strength and aging resistance. On the other hand, the air that is present in the cooling channels must also be considered as an insulating material.
  • the present application has the task of obtaining aging-resistant insulation, especially in the area of high voltage differences, preferably within high-voltage windings.
  • aging-resistant insulation especially in the area of high voltage differences, preferably within high-voltage windings.
  • dust deposits and similar sources of contamination under the influence of moisture lead to leakage current paths.
  • the amount of material for the spacers should be kept as low as possible. It should still be possible to maintain the clear width of the cooling channels within the winding and not to complicate the construction of the coils.
  • This object is achieved in a winding for an air-cooled dry transformer or a choke coil of the type mentioned in that two axially successive spacing elements are arranged in the area of the electrical connections between the winding layers of the winding sections, distributed over the circumference in the cooling channels in the axial direction, the The length of the spacer elements is approximately 0.1 to 0.3, preferably somewhat longer than 0.25, the axis length, and that a peripheral air duct is embedded on the half-axis length between the winding sections.
  • the individual current conductors preferably consist of a monofilament wire; however, it is also possible to wind several wires together at the same time if higher performance is desired.
  • a layer winding is known from DE-AS 1242748, in which support strips are used which are shortened in relation to the layer length. However, these support strips are used in connection with windings which give channels for a forced flow in which the winding layers do not correspond to those in the configuration of the application.
  • the following winding layers 2, 3, ... are characterized by the fact that they consist of two sections 10, 11 of substantially the same length, divided on half the length of the axis, which alternate in the axis end or middle area with the one above and below Winding layer are electrically connected via connecting wires 12, 13. This results in an upper and a lower, essentially mirror-symmetrical partial winding (see reference numbers 10 ', 11').
  • Each of the partial windings has an external connection 14 and 15, respectively.
  • the two partial windings 10 ', 11' are only electrically connected to one another via the innermost layer of turns.
  • Spacer elements 6, 7 are located between the individual winding layers 1, 2, 3, ..., which mechanically span cooling channels 18 between the winding layers and must also withstand the dielectric load.
  • the winding arrangement consists of an inner jacket 21 with the first winding layer 1 lying thereon, which consists of wires lying next to one another, preferably of insulated copper or aluminum wire.
  • a glass fiber jacket 23 is applied to the first winding layer in the wet winding process. These are glass fibers impregnated with epoxy resin, which after curing result in a mechanically very strong cylinder.
  • spacer elements 6 are distributed over the circumference and a further cladding layer 25 made of impregnated, non-conductive glass fibers is applied. The spacer elements 6 are defined.
  • a cooling channel 18 between the winding layers is also created.
  • the next winding layer 27 is then wound up. This is followed by another intermediate layer made of non-conductive, hardening material.
  • the further stratification then follows this scheme.
  • the end forms a jacket 32 made of glass fiber reinforced plastic.
  • the inner layer 1 consists of wire wound close to one another, the layer extending continuously over the entire length of the axis.
  • spacer elements 6 are introduced, the length of which is preferably somewhat more than a quarter of that Axis length of the winding arrangement is.
  • the inserted spacer elements overlap somewhat. Shorter spacer elements can also be used.
  • the subsequent winding layer 2 consists of two sections 10, 11 of substantially the same length, divided over half the length of the axis, which are electrically connected to one another in the axis end region with the winding layer 1 underneath via the connecting wires 12, 13.
  • the sections 10 and 11 are then wound up to about the middle, whereby they approach each other mirror-symmetrically, but leave an air gap 20 approximately in the central region of the winding layer arrangement. There they are electrically connected to the winding layer above them via the wires 29, 30.
  • the two sections belonging to the third winding layer are then wound. These end in the lower section of the winding in an external connection 14.
  • a plurality of taps are provided, so that in addition to the outermost connection 15 there are further tapping points 15 'which, as is known per se from transformer technology, enable tapping to compensate for voltage.
  • the air gap 20 is guided to the outside; the outer jacket is therefore not closed. This arrangement further improves insulation and cooling and prevents leakage current.
  • the spacing elements 6 and 7 do not occupy the entire axis length, but only about a quarter of the axis length on each side.
  • the length of the spacer elements is determined by the mechanical forces on the winding layers; in the range 1/5 ... 3/5 of the length half portion.
  • the air gap ensures that the winding layers lying one above the other are cleanly electrically separated from one another, that is to say they have no leakage current paths. Furthermore, the air gap 20 in the middle enables the electrical isolation between the two winding sections 10 ', 11'.
  • the clear width of the cooling channels can be optimally designed and thereby improve the cooling performance without having to accept significant disadvantages.

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

Claims (1)

  1. Enroulement pour transformateur à sec refroidi par air ou bien une bobine de self présentant au moins deux couches d'enroulement et présentant la structure suivante:
    - la couche d'enroulement (1) placée complètement à l'intérieur est continue sur toute la longueur axiale de l'enroulement,
    - les couches d'enroulement (2, 3 ...) se suivant vers l'extérieur se composent de deux sections (10, 11) essentiellement de même longueur, divisées à peu près à la moitié de la longueur axiale et qui sont reliées électriquement, alternativement dans la zone de l'extrémité ou du milieu de l'axe, à la couche ou section d'enroulement située au-dessus et en dessous,
    - la ou les couches d'enroulement sont séparées de la ou des autres couches disposées concentriquement par des cavités qui forme des canaux de refroidissement (18),
    - les éléments d'espacement (6, 7) en forme de barreaux sont disposés axialement dans lesdites cavités,

    caractérisé en ce qu'il est prévu, dans la zone des connexions électriques entre les couches de sections d'enroulement, des paires d'éléments d'espacement placés axialement l'un derrière l'autre dans les canaux de refroidissement (18), ces éléments étant répartis sur la périphérie et la longueur des éléments d'espacement (6, 7) étant supérieure d'environ 0,1 à 0,3 fois, de préférence 0,25 fois à la longueur axiale, et en ce qu'un canal d'air périphérique (20) est ménagé entre les sections d'enroulement (10, 11) au milieu de la longueur axiale.
EP80100436A 1979-02-08 1980-01-29 Enroulement pour un transformateur à sec refroidi par air Expired EP0014418B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80100436T ATE442T1 (de) 1979-02-08 1980-01-29 Wicklung fuer einen luftgekuehlten trockentransformator.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2904746 1979-02-08
DE2904746A DE2904746C3 (de) 1979-02-08 1979-02-08 Wicklung für einen luftgekühlten Trockentransformator

Publications (3)

Publication Number Publication Date
EP0014418A1 EP0014418A1 (fr) 1980-08-20
EP0014418B1 true EP0014418B1 (fr) 1981-11-25
EP0014418B2 EP0014418B2 (fr) 1985-11-21

Family

ID=6062448

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100436A Expired EP0014418B2 (fr) 1979-02-08 1980-01-29 Enroulement pour un transformateur à sec refroidi par air

Country Status (4)

Country Link
EP (1) EP0014418B2 (fr)
JP (2) JPS55110011A (fr)
AT (1) ATE442T1 (fr)
DE (1) DE2904746C3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438653C1 (de) * 1994-10-28 1996-06-20 Siemens Ag Gießharztransformator
DE10213117B4 (de) * 2002-03-23 2004-03-11 Amborn, Peter, Dr.-Ing. Wellenkupplung mit hohem Wirkungsgrad

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB641056A (en) * 1948-08-11 1950-08-02 English Electric Co Ltd Improvements in and relating to inductive windings
DE1039637B (de) * 1956-11-28 1958-09-25 Bbc Brown Boveri & Cie Lagenwicklung fuer mit Kuehlmittel-oeffnungen in den Wicklungslagen versehene Hochspannungsspulen
US3083331A (en) * 1959-12-16 1963-03-26 Ferranti Ltd Series parallel transformer winding arrangement
US2987684A (en) * 1960-04-18 1961-06-06 Gen Electric Electrical apparatus
DE1270167B (de) * 1962-11-27 1968-06-12 Licentia Gmbh In Giessharz eingebettete Wicklung fuer Leistungstransformatoren in Trockenbauweise
DE1242748B (de) * 1963-11-11 1967-06-22 Licentia Gmbh Hochspannungslagenwicklung fuer Transformatoren, Drosselspulen u. dgl. Induktionsgeraete
DE1513916B2 (de) * 1965-03-01 1970-04-16 Licentia Patent-Verwaltungs-GmbH, 6OOO Frankfurt; Wicklungsaufbau mit mehreren axial übereinanderliegenden Teilwicklungen für Transformatoren und Drosselspulen
DE2207205C3 (de) * 1972-02-16 1979-02-22 Transformatoren Union Ag, 7000 Stuttgart Luftgekühlter Transformator mit einem oder mehreren axialen Kühlkanälen
DE2246235B2 (de) * 1972-09-21 1978-08-24 Transformatoren Union Ag, 7000 Stuttgart Trockentransformator

Also Published As

Publication number Publication date
DE2904746A1 (de) 1980-08-28
JPH0132339Y2 (fr) 1989-10-03
JPS63174420U (fr) 1988-11-11
DE2904746B2 (de) 1981-07-09
ATE442T1 (de) 1981-12-15
JPS55110011A (en) 1980-08-25
EP0014418B2 (fr) 1985-11-21
DE2904746C3 (de) 1985-01-24
EP0014418A1 (fr) 1980-08-20

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