EP1282142B1 - Système d'enroulement électrique - Google Patents

Système d'enroulement électrique Download PDF

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Publication number
EP1282142B1
EP1282142B1 EP20020090275 EP02090275A EP1282142B1 EP 1282142 B1 EP1282142 B1 EP 1282142B1 EP 20020090275 EP20020090275 EP 20020090275 EP 02090275 A EP02090275 A EP 02090275A EP 1282142 B1 EP1282142 B1 EP 1282142B1
Authority
EP
European Patent Office
Prior art keywords
winding
cooling
transformer
cooling element
assemblies
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 - Lifetime
Application number
EP20020090275
Other languages
German (de)
English (en)
Other versions
EP1282142A3 (fr
EP1282142A2 (fr
Inventor
Friedrich Alber
Fritz Sorg
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
Publication of EP1282142A2 publication Critical patent/EP1282142A2/fr
Publication of EP1282142A3 publication Critical patent/EP1282142A3/fr
Application granted granted Critical
Publication of EP1282142B1 publication Critical patent/EP1282142B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/085—Cooling by ambient air

Definitions

  • the invention relates to an electrical winding arrangement with at least two juxtaposed winding subassemblies.
  • Such a winding arrangement is known from the German patent DE 199 12 280 C1 , There, a transformer is described in which the winding arrangement has three standing and juxtaposed in a row winding sub-assemblies.
  • Each of the winding subassemblies is provided for one phase of the electrical transformer and has a high voltage winding and a low voltage winding.
  • Each low-voltage winding is arranged coaxially in the associated high-voltage winding and thereby surrounded by this. Between the upper and lower voltage winding a gap is left to flow through with cooling air, which forms an annular channel.
  • Each of the winding subassemblies each surrounds a core leg of a closed transformer core.
  • the DE 199 12 280 C1 a transformer and method for cooling a transformer.
  • the transformer comprises three winding combinations, wherein the second winding combination is subjected to a correspondingly higher thermal load when subjected to a higher electrical rated power, compared to the first and the third winding combination.
  • the second winding combination has a cooling element and thus the second winding combination is cooled with a higher cooling capacity than the first and the third winding combination.
  • the object of the invention is to provide an electrical winding arrangement of the type mentioned, which is designed for a comparatively high rated power.
  • a cooling element is arranged, which is designed as a cooling plate, which divides the gap between juxtaposed winding sub-assemblies in two sub-columns.
  • the winding subassemblies give heat directly to the surrounding air and by thermal radiation to other surrounding parts, such as the Core or each other winding sub-assemblies.
  • the locations of a winding subassembly which are close to another winding subassembly are heated to a greater extent.
  • the stronger heating is due to the fact that the winding sub-assemblies there due to their proximity more strongly heat each other by each of them emitted heat radiation and the Wicklungssteilan extract there are worse coolable because there is only a small distance between them, so that the more heated points for a cooling medium are less accessible.
  • the cooling element arranged exactly there between the winding subassemblies acts like a screen for the thermal radiation lying between the winding arrangements.
  • the cooling element the heat radiation otherwise emitted from one winding arrangement to the other is largely absorbed and thus does not pass from one to the other winding arrangement.
  • the cooling element is thereby heated; from the surface of the cooling element, however, the heat is released directly to the surrounding cooling air, whereby the cooling element is cooled.
  • the mutual heating of the winding sub-assemblies is thus reduced and a heat accumulation largely avoided between the winding sub-assemblies.
  • the cooling element the temperature distribution during operation within each of the winding sub-assemblies is made uniform and the winding sub-assemblies are better cooled.
  • the electric winding assembly having a higher rated electric power is operable than the prior art electrical winding assembly.
  • the winding arrangement according to the invention can just as well be operated with the same rated electrical power, although the requirements for the thermal resistance of the insulating material used in the winding sub-arrangements are lower can be as in the prior art, so that the electrical winding assembly is cheaper for the same electrical rated power.
  • the cooling element may be arranged in contact with the two winding sub-assemblies between them.
  • the winding sub-assemblies are juxtaposed while leaving a gap and the cooling element is formed as a cooling plate which divides the gap into two sub-columns.
  • a cooling fluid for example cooling air. Due to the cooling fluid, the winding subassemblies and also the cooling plate are cooled convectively.
  • the winding sub-assemblies emit heat by radiation, which are absorbed by the cooling plate, and thereby do not reach the other part windings. Through the cooling plate, the winding sub-assemblies are thermally shielded from each other.
  • the cooling plate can be formed from a solid material, for example a composite material.
  • the cooling plate preferably has cooling passages for flowing through with a cooling fluid. Taking into account the selected orientation and arrangement of the plate, the cooling channels are guided in such a way that they can be flown through by the cooling fluid as well as possible. With cooling fluid flowing through the cooling channels, the cooling plate itself is particularly easy to cool.
  • the cooling element is formed entirely of electrical insulating material. In this embodiment, a good cooling is achieved with high dielectric strength between the winding sub-assemblies.
  • the cooling element may be formed of a good heat conducting material.
  • metals are suitable for this purpose.
  • the cooling element is formed of metal with an electrical insulating material as a coating.
  • the cooling element has the high thermal conductivity of the metal and at the same time a deterioration of important electrical properties of the winding arrangement, such as the dielectric strength, is avoided by the insulating effect of the coating.
  • the cooling element may also be formed completely from a metal. This embodiment is particularly suitable where there are only low demands on the dielectric strength, or there are no special requirements for the dimensions of the winding arrangement, so that the distance between the winding sub-assemblies can be chosen so that the dielectric strength meets the prescribed requirements.
  • the winding sub-assemblies are components of a transformer and each enclosing a core leg of a closed transformer core, wherein the cooling element is arranged in the window of the transformer core.
  • FIG. 1 a section through a transformer 1 is shown, which is designed here as a three-phase transformer.
  • the transformer 4 has a winding arrangement 2 with winding subassemblies 3 to 5, which are each arranged standing and which respectively enclose a core leg 6, 7 or 8 of a transformer core 9 closed via yokes 9A and 9B.
  • Each of the partial winding arrangements 3 to 5 has in each case a high-voltage winding 10, 11 or 12 and a low-voltage winding 13, 14 and 15, respectively.
  • Each undervoltage winding 13, 14 and 15 is arranged standing within their associated high-voltage winding 10, 11 and 12 respectively.
  • the cooling elements 20 and 21 are presently designed in each case as a cooling plate (see also Figures 2 and FIG. 3 , Reference numerals 48 and 49).
  • the cooling elements 20 and 21 each divide one of the gaps 22 and 23 into partial gaps 22a, 22b or 23a, 23b.
  • the interspaces 16 to 18 and the partial gaps 22 a, 22 b and 23 a, 23 b of cooling air 19 flows through.
  • 10 to 15 of the windings heat is delivered directly to the cooling air 19 by convection.
  • the windings 10 to 15 give off heat in the form of radiation to the environment. Parts in the environment, such as the core leg 6, absorb this radiation and are thereby heated.
  • the windings 10 to 15 also heat each other more or less by their heat radiation.
  • the improved cooling with the cooling elements 20 and 21 will be explained with reference to the cooling element 20. The same applies to the cooling element 21.
  • the cooling element 20 arranged between them is provided. It is thus there between the two winding subassemblies 3 and 4, where these or their high-voltage windings 10 and 11 come closest (s Figures 2 and 3 ).
  • the cooling element 20 absorbs the heat radiation otherwise emitted from one high-voltage winding 10 to the other high-voltage winding 11 and vice versa and is thereby heated.
  • the cooling element 20 is convectively cooled by cooling air 19 flowing through the partial gaps 22a and 22b.
  • the high-voltage windings 10 and 11 and thus the winding subassemblies 3 and 4 are thermally shielded from each other by the cooling element 20 against each other and compared to the prior art, the area coolable with cooling air 19 increases.
  • the thermal shield with the cooling element 20 the high-voltage winding 10 and the high-voltage winding 11 no longer heat each other, so that they assume a lower operating temperature overall, so are better cooled compared to the prior art.
  • the cooling element 20 which shields the high-voltage winding 11 and the high-voltage winding 12 mutually thermally.
  • the cooling elements 20 and 21 are presently each formed of a metal plate 24 and 25, which is respectively provided with a coating of insulating material 26 and 27 respectively.
  • Suitable metals are aluminum or transformer sheet and as thermally conductive insulating material such as polyester, kraft paper or glass fiber reinforced plastic (GRP) in question.
  • the cooling elements 20 and 21 are arranged in the windows 30 and 31 formed by the transformer core 9.
  • the cooling elements 20 and 21 are each provided with cooling channels 28 and 29 (s. FIG. 2 ) provided with cooling air 19 for the flow. As a result, the cooling elements 20 and 21 can be cooled particularly effectively by the cooling air 19.
  • FIG. 2 is the transformer 1 in the in FIG. 1 shown specified cutting plane. It can be clearly seen there that the cooling elements 20 and 21 are each designed as cooling plates and have the cooling channels 28 or 29 provided for the flow of cooling air 19 through them.
  • the winding sub-assemblies are each formed with circular cylindrical windings 10 to 15.
  • cooling elements 20 and 21 are each symmetrical between them directly adjacent winding sub-assemblies 3 and 4 or 4 and 5 are arranged.
  • FIG. 3 is one to in FIG. 1 Represented with II sectional view corresponding representation for a transformer 1a with a winding assembly 2a with three winding sub-assemblies 32 to 34 shown.
  • Each of the winding subassemblies 32 to 34 corresponding to the winding subassemblies 3 to 5 according to FIG. 1 a high-voltage winding 35, 35 and 37, respectively surrounding a low-voltage winding 38, 39 and 40 coaxially.
  • a gap 41, 42 and 43 are left to flow with cooling air 19 respectively.
  • Each winding arrangement 32 to 34 surrounds a core leg 44, 45 and 46 of a transformer core, which corresponds to the transformer core 9 and is self-contained.
  • the winding sub-assemblies 32 to 34 are designed with windings 35 to 40, each having a rectangular cross-section. Accordingly, the core legs 44 to 46 of the transformer core 47 are formed with a rectangular cross-section.
  • a respective cooling elements 20 and 21 similar cooling element 48 and 49 is arranged, each of which is also formed as a cooling plate.
  • the cooling elements 48 and 49 are each formed from a solid material.
  • the solid material can be a metal or an insulating material - as already in the description too FIG. 1 be specified.
  • the cooling elements are particularly easy to produce.
  • These cooling elements 48 and 49 are also in the winding assembly 2 after FIGS. 1 and 2 instead of the cooling elements 20 and 21 applicable.
  • the cooling elements 48 and 49 may be designed like the cooling elements 20 and 21.
  • the choice of the rectangular cross sections for the windings 35 to 40 and the core legs 44 to 46 allows a particularly compact construction of the transformer 1a.
  • the transformer 1A can be optimized in terms of material costs.
  • the winding sub-assembly 34 and in particular its high-voltage winding 37 and the core leg 46 which surrounds the winding sub-assembly 34 received in particular.
  • the other explanations also apply to the other winding sub-assemblies 32 and 33 and their core legs 4 and 45, respectively.
  • the total width B3 is set. Assuming that the cross-sectional area of the core legs 44, 45, 46 should each remain constant, so decreases the length L2 of the core leg 46 and thus the length L1 of the high-voltage winding 37 and the corresponding dimension of the lower voltage winding 40 with decreasing total width B3. As a result, the amount of core material used decreases as the overall width B3 decreases, because the yokes of the transformer core 47 extending over the entire width B3 (corresponding to those in FIG FIG. 1 shown yokes 9A and 9B of the transformer core 9) become shorter.
  • the amount of the conductor material used, from which the winding conductors of the windings 37 and 40 are respectively formed, increases because the length L1 of the high-voltage winding 37 and the corresponding dimension of the winding 40 increases.
  • the quantities of material for the winding conductor material and the core material behave in opposite directions with changing overall width B3.
  • the total width B3 and thus the dimensions B1 and B2, L1 and L2 and the corresponding dimensions of the undervoltage winding 40 and the corresponding dimensions Select dimensions of the winding subassemblies 32 and 33 so that the total costs for the conductor material and the core material are the lowest.
  • the winding sub-assembly 32 and 33 or 33 and 34 specifically their high-voltage windings 35 and 36 and 36 and 38 large facing surfaces 50 and 51 and 52 and 53, via which the high-voltage windings 35 to 37 each heat for each opposing high-voltage windings 35 to 37 deliver. Due to the arrangement of the cooling elements 48 and 49 respectively exactly between the winding sub-assemblies 32 and 34, the winding sub-assemblies 32 to 34 are thermally shielded against each other and each of the high-voltage windings 35 to 37 output heat from the cooling elements 48 and 49 and discharged to the cooling air 19.
  • the width B3 of the transformer 1A can be selected smaller than without the provision of such cooling elements 48 and 49, since then the respective distance between the winding sub-assemblies 32 to 34 and their high-voltage windings 35 and 36 or 36 and 37 are selected to be larger must, so that a flow of cooling air 19 alone sufficient for their cooling in nominal operation and inadmissible high heating of the high-voltage windings 35 to 37 is avoided.
  • width B3 is of course also possible with winding subassemblies with another non-circular cross section, for example elliptical cross section.
  • the windings 10 to 15 and 35 to 40 may each be formed as a self-supporting winding with a dry insulation.
  • Casting resin or adhesive resin is used in particular as insulating material; Also, fiberglass material can be used for insulation.

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

Claims (6)

  1. Système ( 2, 2a ) d'enroulement électrique, comprenant au moins deux sous-systèmes ( 3, 4 ; 32, 33 ) d'enroulement, un élément ( 20, 48 ) de refroidissement étant disposé entre les sous-systèmes ( 3, 4 ; 32, 33 ) d'enroulement, et les sous-systèmes ( 3, 4 ; 32, 33 ) étant disposés côte à côte en laissant un intervalle ( 22 ),
    caractérisé en ce que l'élément ( 20 ) de refroidissement est constitué sous la forme d'une plaque de refroidissement qui sépare l'intervalle ( 22 ) en deux sous-intervalles ( 22A, 22B ).
  2. Dispositif ( 2, 2a ) d'enroulement électrique suivant la revendication 1, caractérisé en ce que la plaque ( 20 ) de refroidissement a des canaux ( 28 ) de refroidissement de passage d'un fluide ( 19 ) de refroidissement.
  3. Dispositif ( 2, 2a ) d'enroulement électrique suivant l'une des revendications 1 à 2,
    caractérisé en ce que l'élément ( 48 ) de refroidissement est constitué entièrement en un isolant électrique.
  4. Dispositif ( 2, 2a ) d'enroulement électrique suivant l'une des revendications 1 à 2,
    caractérisé en ce que l'élément ( 20 ) de refroidissement est en un métal ayant une substance isolante du point de vue électrique comme revêtement.
  5. Dispositif ( 2, 2a ) d'enroulement électrique suivant l'une des revendications 1 à 2,
    caractérisé en ce que l'élément ( 48 ) de refroidissement est entièrement en un métal.
  6. Dispositif ( 2, 2a ) d'enroulement électrique suivant l'une des revendications précédentes,
    caractérisé en ce que les sous-systèmes ( 3, 4, ; 32, 33 ) d'enroulement font partie d'un transformateur ( 1, 1A ) et entourent un noyau ( 9 ; 47 ) de transformateur fermé, l'élément ( 20 ; 48 ) de refroidissement étant disposé dans la fenêtre ( 30 ) du noyau ( 9 ; 47 ) du transformateur.
EP20020090275 2001-07-30 2002-07-23 Système d'enroulement électrique Expired - Lifetime EP1282142B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10137518 2001-07-30
DE2001137518 DE10137518C1 (de) 2001-07-30 2001-07-30 Elektrische Wicklungsanordnung

Publications (3)

Publication Number Publication Date
EP1282142A2 EP1282142A2 (fr) 2003-02-05
EP1282142A3 EP1282142A3 (fr) 2003-05-28
EP1282142B1 true EP1282142B1 (fr) 2010-09-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020090275 Expired - Lifetime EP1282142B1 (fr) 2001-07-30 2002-07-23 Système d'enroulement électrique

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EP (1) EP1282142B1 (fr)
DE (2) DE10137518C1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2010003420A (es) * 2007-09-28 2010-04-21 Siemens Ag Cuerpo de arrollamiento electrico y transformador con refrigeracion forzada.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62165307A (ja) * 1986-01-16 1987-07-21 Fuji Electric Co Ltd 液冷式均一磁場コイル
SE9704414D0 (sv) 1997-02-03 1997-11-28 Asea Brown Boveri Axiell luftkylning och transformator
DE19912280C1 (de) * 1999-03-18 2000-09-14 Siemens Ag Transformator und Verfahren zur Kühlung eines Transformators

Also Published As

Publication number Publication date
EP1282142A3 (fr) 2003-05-28
EP1282142A2 (fr) 2003-02-05
DE10137518C1 (de) 2003-04-24
DE50214685D1 (de) 2010-11-11

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