EP0014418A1 - 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
EP0014418A1
EP0014418A1 EP80100436A EP80100436A EP0014418A1 EP 0014418 A1 EP0014418 A1 EP 0014418A1 EP 80100436 A EP80100436 A EP 80100436A EP 80100436 A EP80100436 A EP 80100436A EP 0014418 A1 EP0014418 A1 EP 0014418A1
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EP
European Patent Office
Prior art keywords
winding
layer
layers
sections
length
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.)
Granted
Application number
EP80100436A
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German (de)
English (en)
Other versions
EP0014418B1 (fr
EP0014418B2 (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(A1) "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
Publication of EP0014418B1 publication Critical patent/EP0014418B1/fr
Application granted granted Critical
Publication of EP0014418B2 publication Critical patent/EP0014418B2/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
    • 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 invention relates to a winding for an air-cooled dry transformer or a corresponding choke coil with at least two winding layers and cooling channels lying between the winding layers and spacing elements lying in the axial direction in the cooling channels.
  • 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 mechanical and electrical stress, there is a sufficient safety distance between them insulating turns in adjacent turns must be observed. Furthermore, it can be observed that 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 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 taken into account as an insulating material.
  • An upper and lower, essentially mirror-symmetrical partial winding is thus formed, each of which has an external connection; both partial windings are electrically connected to each other within the winding only via the innermost winding layer.
  • 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.
  • the use of the new winding advantageously results in smaller voltage differences at the most stressed points, in particular when layers lying one above the other are considered. These voltage differences can be adequately separated by air insulation. Spacers are then still required to determine the positions in order to increase the mechanical strength; However, these spacers do not need to be arranged over the entire length of the partial winding, since these are z. B. with cast resin have a higher rigidity.
  • DE-AS 1 270 167 is in cast resin cast winding for transformers known, in which each winding element consists of three concentric winding layers, in which the connections to and from the winding elements are located at the outer ends of the outer surface of the element, the winding in the outer and middle layer body each consisting of two concentric half-layers, which are connected in series with the continuous layer in the inner layer body in a meandering manner.
  • the subject of the aforementioned DE-AS does not solve the task of systematically moving zones of higher voltage to air-cooled transformers where an air gap or duct prevents leakage current paths, since such a solution does not exist in a fully encapsulated transformer, even from the cited document can play a role.
  • 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 or 15. Inside the winding, the two partial windings 10 ', 11' are only electrically connected to one another via the innermost winding layer.
  • Spacer elements 6, 7 are located between the individual winding layers, which mechanically span the cooling channels 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.
  • Ab Stand elements 6 distributed over the circumference and another cladding layer 25 made of impregnated, non-conductive glass fibers applied. The spacer elements are defined.
  • 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 the axial length of the winding arrangement.
  • the inserted spacing elements lying one above the other overlap somewhat. Shorter spacer elements can also be used.
  • the subsequent winding layer 2 consists of two sections 10, 11 of essentially the same length, divided over half the length of the axis, which are electrically connected to one another in the axial end region with the winding layer 1 underneath via the connection 12, 13.
  • the sections 10 and 11 are then wound up to about the middle, where 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. Then the two sections belonging to the third winding layer are wound. These end in a connection 14 in the lower section of the winding. A plurality of taps are provided in the upper section, 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 for voltage equalization. As can be seen, in the winding arrangement shown, 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 paths.
  • 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 layer tension; it is in the range 1/5 ... 3/5 of half the section length.
  • 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 present arrangement makes it possible to make do with less and lower quality insulation material, the clear width of the cooling channels being able to be designed optimally and thereby improving the cooling performance without having to accept significant disadvantages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
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 true EP0014418A1 (fr) 1980-08-20
EP0014418B1 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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0709864A3 (fr) * 1994-10-28 1996-06-05 Siemens Ag
DE10213117B4 (de) * 2002-03-23 2004-03-11 Amborn, Peter, Dr.-Ing. Wellenkupplung mit hohem Wirkungsgrad

Citations (8)

* 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
US2987684A (en) * 1960-04-18 1961-06-06 Gen Electric Electrical apparatus
US3083331A (en) * 1959-12-16 1963-03-26 Ferranti Ltd Series parallel transformer winding arrangement
DE1242748B (de) * 1963-11-11 1967-06-22 Licentia Gmbh Hochspannungslagenwicklung fuer Transformatoren, Drosselspulen u. dgl. Induktionsgeraete
DE1270167B (de) * 1962-11-27 1968-06-12 Licentia Gmbh In Giessharz eingebettete Wicklung fuer Leistungstransformatoren in Trockenbauweise
DE1513916A1 (de) * 1965-03-01 1969-04-10 Licentia Gmbh Wicklungsaufbau mit mehreren axial uebereinanderliegenden Teilwicklungen fuer Transformatoren und Drosselspulen
DE2207205A1 (de) * 1972-02-16 1973-08-23 Transformatoren Union Ag Luftgekuehlter transformator mit einem oder mehreren axialen kuehlkanaelen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2246235B2 (de) * 1972-09-21 1978-08-24 Transformatoren Union Ag, 7000 Stuttgart Trockentransformator

Patent Citations (8)

* 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
DE1513916A1 (de) * 1965-03-01 1969-04-10 Licentia Gmbh Wicklungsaufbau mit mehreren axial uebereinanderliegenden Teilwicklungen fuer Transformatoren und Drosselspulen
DE2207205A1 (de) * 1972-02-16 1973-08-23 Transformatoren Union Ag Luftgekuehlter transformator mit einem oder mehreren axialen kuehlkanaelen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0709864A3 (fr) * 1994-10-28 1996-06-05 Siemens Ag
DE10213117B4 (de) * 2002-03-23 2004-03-11 Amborn, Peter, Dr.-Ing. Wellenkupplung mit hohem Wirkungsgrad

Also Published As

Publication number Publication date
DE2904746B2 (de) 1981-07-09
JPS63174420U (fr) 1988-11-11
EP0014418B1 (fr) 1981-11-25
JPS55110011A (en) 1980-08-25
EP0014418B2 (fr) 1985-11-21
DE2904746A1 (de) 1980-08-28
DE2904746C3 (de) 1985-01-24
ATE442T1 (de) 1981-12-15
JPH0132339Y2 (fr) 1989-10-03

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