EP2330603A1 - Transformateur doté d'un enroulement de bande - Google Patents

Transformateur doté d'un enroulement de bande Download PDF

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Publication number
EP2330603A1
EP2330603A1 EP09015033A EP09015033A EP2330603A1 EP 2330603 A1 EP2330603 A1 EP 2330603A1 EP 09015033 A EP09015033 A EP 09015033A EP 09015033 A EP09015033 A EP 09015033A EP 2330603 A1 EP2330603 A1 EP 2330603A1
Authority
EP
European Patent Office
Prior art keywords
winding
corrugated
transformer according
band
strip
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.)
Withdrawn
Application number
EP09015033A
Other languages
German (de)
English (en)
Inventor
Marcos Bockholt
Frank Cornelius
Burak Esenlik
Jens Tepper
Benjamin Weber
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.)
ABB Technology AG
Original Assignee
ABB Technology 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 Technology AG filed Critical ABB Technology AG
Priority to EP09015033A priority Critical patent/EP2330603A1/fr
Publication of EP2330603A1 publication Critical patent/EP2330603A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • H01F27/327—Encapsulating or impregnating
    • H01F2027/328—Dry-type transformer with encapsulated foil winding, e.g. windings coaxially arranged on core legs with spacers for cooling and with three phases
    • 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
    • H01F27/2847—Sheets; Strips

Definitions

  • the invention relates to a transformer, for example a dry-type transformer, having at least one coil which has a strip winding formed from strip material, which coil is formed in each case of an undervoltage and a radially adjoining high-voltage winding, each having an inner and an outer electrical connection is provided alternately inwardly and outwardly parallel to the winding axis with tube-like shaped corrugations in which the winding band is corrugated, so that channels are formed in the thus provided corrugations, through which cooling fluid can be flowed.
  • a transformer for example a dry-type transformer, having at least one coil which has a strip winding formed from strip material, which coil is formed in each case of an undervoltage and a radially adjoining high-voltage winding, each having an inner and an outer electrical connection is provided alternately inwardly and outwardly parallel to the winding axis with tube-like shaped corrugations in which the winding band is corrugated, so that channels are formed in the thus provided corrugations, through which
  • the invention relates to the cooling of windings in transformers, especially in dry-type transformers.
  • a winding for a transformer in particular a strip conductor formed tape winding for a cast resin transformer has been known, which is provided with at least one provided for guiding a cooling fluid axially extending cavity which is bounded radially inwardly and outwardly by winding layers of the winding conductor, wherein a plurality of eccentrically arranged, axially extending cavities is provided, which serve as cooling channels, and the cavities are arranged along a winding layer and the cavities are formed by Wellform documentation the winding conductor in this winding layer.
  • a transformer is known with a wound with conductor material coil, are introduced in the cooling channels through which a cooling fluid flows, wherein corrugated components are formed in the coil to form the cooling channels, the waveform of the outer surface, in particular to the outer contour in corner regions of the coil is adapted, these components may also be formed by suitable conductor material.
  • both the low voltage and the high voltage winding are each made smooth-band, that at least in the region of the main scattering channel between the upper and lower voltage winding, a first well region is provided and that a second wave region is provided, which is formed by an attached to the last winding layer of the outer winding further layer corrugated winding tape.
  • smooth band is understood to mean a band conductor which is undecorated and runs flat in the development.
  • the mentioned further winding layer which is provided from corrugated winding tape, integrally attached to the largely smooth-band winding tape, for example by means of welding.
  • the selection of the used joining method depends essentially on the respective manufacturing capabilities and the material of the material, since for example in electrically good conductive conductor material required for electrical resistance welding specific electrical Resistance may be too low or requires significant currents.
  • the mentioned further winding layer of corrugated winding tape is attached to the outer electrical connection, which is provided in principle in band-shaped winding conductors.
  • the attached further winding layer of corrugated winding tape in the region is made smooth-band in the region to an adjacent winding so as to compensate for the increased by the Wellverformung the winding tape space requirements, that is, the distance each Coil to the adjacent winding coils despite increased Diameter of the coil winding coil according to the invention and thus to comply with the usual dimensions of three-phase transformers.
  • An expedient development of the transformer according to the invention provides that the winding band in the first and / or in the second well region, that is formed on the one hand in the region between the upper voltage and lower voltage windings as well as on the other side on the outside similar sine waves, the amplitude and the Wavelength of this sine wave-like tape winding is adjusted according to the intended dimensions or the required cooling capacity of the relevant transformer.
  • the radially inner winding is integrally connected upon reaching the intended number of turns with the inner electrical connection, wherein a further winding layer corrugated winding tape is attached to the inner terminal, so in the area between the lower and upper voltage winding, the cooling channels according to the invention to build.
  • the radially inner winding is extended by a further winding layer corrugated winding tape upon reaching the number of turns provided for the transformer in question, being attached to the one end of this turn of corrugated winding tape to the inner Austechnischsschiene , preferably by welding.
  • the first winding layer of the outer winding, which adjoins the inner winding radially, is corrugated, that is to say that the first winding of the outer winding comprising the inner winding is formed from a sine wave-like shaped winding strip.
  • each corrugated winding layer is electrically insulated from the winding.
  • the transformer according to the invention is formed with a coil consisting of a strip material consisting of strip material and a wire coil consisting of wire, that is, that only one of the two windings of each coil as a tape winding is executed, while the respective other radially adjacent winding is designed as a wire winding.
  • the further embodiment of this variant corresponds to the transformer already described above, each having an undervoltage and a radially subsequent high-voltage winding with electrical connections.
  • a region with alternately inwardly and outwardly parallel to the winding axis is provided with tube-like shaped corrugations, so that channels are formed in the thus provided corrugations, through which cooling fluid can be flowed.
  • the variant given above differs from the transformer described in the introduction in that, in the case of internal wire winding, the tube-like-shaped corrugated regions between the two windings are formed by the band winding adjoining radially on the outside.
  • the tube-like shaped regions are accordingly formed by the inner band winding on its outer side.
  • a variant with external wire winding may be provided, in which the tube-like shaped areas are formed by the inside adjacent tape winding.
  • another layer of wave-shaped tape is added to the outside of the wire winding, wherein this attached tape has no electrically conductive connection to the winding.
  • a sine wave-like shaped winding layer may be provided, which adjoins the end of the smooth-band tape winding.
  • the corrugated winding layers are provided with recesses in the waves. It proves to be particularly advantageous that at least partially recesses are formed in the corrugated surfaces of the winding layers.
  • a further advantageous embodiment of the transformer according to the invention provides that the outer surface of the outer corrugated winding layer is executed in a darker color and thus radiates the heat of dissipation reaching the surface.
  • Fig. 1 is a schematic representation of a circular cross-section through a first embodiment of the tape winding 10 of the invention for a transformer not shown in detail.
  • the tape winding exists here from a number of first turns 12 of smooth conductor strip 14 and an additional turn 16 of wavy conductor strip 18th
  • the waveform of the corrugated conductor strip is formed according to the invention similar sine waves, with their amplitude and respective wavelength are tuned to the thermal requirements of the relevant transformer and its size and power.
  • Fig. 1 symbolically but only one turn shown, said single turn shown 12 is connected at its inner end with an inner terminal rail or outlet 20 and is connected at its outer end to an outer terminal rail or outlet 22.
  • corrugated conductor strip 18 in turn connects to the outer connecting rail or outlet 22 and ends after a complete circulation, so that the cylindrical belt winding 10 thus formed is surrounded on its outside by a coaxially arranged tube-like channels 24 through which Cooling fluid can flow.
  • cooling fluid is mainly a cooling gas, for example, air, provided.
  • a cooling fluid for example, air
  • another gas or a liquid may be provided, wherein in the case of the use of a cooling liquid further, familiar to the expert insulation and sealing measures are provided.
  • Fig. 2 is a schematic representation of a circular cross-section through a second, reproduced to the first alternative embodiment of the tape winding 10 according to the invention.
  • the tape winding here also consists of a number of first turns 12 of smooth conductor strip 14 and an additional turn 17 of at least partially wavy conductor strip 19th
  • the waveform of the corrugated conductor strip according to the invention is similarly formed sine waves, their amplitude and respective wavelength are also matched to the thermal requirements of the relevant transformer and its size and performance.
  • Fig. 1 symbolically shown here only one turn, this single turn shown 12 is connected at its inner end with an inner terminal rail or outlet 20 and is connected at its outer end to an outer terminal rail or outlet 22.
  • the mentioned additional turn 17 of at least partially corrugated conductor strip 19 in turn connects to the outer connecting rail or outlet 22 and also ends after a complete circulation.
  • this additional turn 17 is not waved over its entire circumferential length, so that the cylindrical band winding 10 thus formed is not completely surrounded on its outside by a coaxially arranged tube-like channels 24, through which cooling fluid can flow, but it is in the area , which is adjacent to a three-phase transformer another coil, smooth running so as not to exceed the construction dimensions of the transformer by maintaining the usual coil spacings as possible.
  • cooling fluid a cooling gas, for example air, is also provided here.
  • a cooling fluid but also another gas or a liquid, because of their higher heat capacity than gas, be provided, in the case of using a coolant further, the skilled person generally familiar measures for electrical insulation and to provide sealing.
  • Fig. 3 is a detail of a plan view of a corrugated surface 26 of a wavy strip conductor 16 and a partially corrugated strip conductor 17 reproduced, in which plan view recesses 28 are visible in the corrugated surface, which are preferably provided as punched 28.
  • plan view recesses 28 can also be introduced, for example, by means of laser cutting in the corrugated surfaces 26.
  • the recesses 28 in the corrugated surface 26 serve to increase the residence time of the cooling medium, in particular cooling air, in the region of the cooling channels 24.
  • the recesses 28 may be formed as cooling slots or in other geometry, through which the cooling fluid can enter and exit again.
  • 30 with the inlet openings for the cooling fluid and 32 are the outlet openings for the cooling fluid, wherein the flow arrows shown indicate the flow direction.
  • the idea underlying the invention provides for improved cooling on the outer surface of an external tape winding 10 by the winding 10 is continued after welding to the winding 10 normally final Aus effetsschiene 22 with a corrugated turn 18 around the winding 10.
  • a good heat transfer from the winding 10 to the corrugated part 18 is achieved by heat conduction.
  • Fig. 2 As an example, an outer coil of a three-phase transformer is shown, in which the corrugated strip conductor 19, which is corrugated to itself, has a smooth-banding to the adjacent coil.
  • this cooling principle can also be applied to the main scattering channel, that is the main isolation region, between two band windings 10, each with a corrugated turn, especially when both windings are low-voltage windings.
  • the main baffle channel is not shown, only external cooling.
  • either the conductor material of the inner winding is not cut off at the end of the winding before welding the second electrical connection, but continued for another turn in wavy form.
  • the connection with the winding has the advantage of good heat conduction in the corrugated part.
  • the corrugated component can also be produced by a turn of the second winding at the beginning before attachment of the first electrical connection.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP09015033A 2009-12-04 2009-12-04 Transformateur doté d'un enroulement de bande Withdrawn EP2330603A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09015033A EP2330603A1 (fr) 2009-12-04 2009-12-04 Transformateur doté d'un enroulement de bande

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09015033A EP2330603A1 (fr) 2009-12-04 2009-12-04 Transformateur doté d'un enroulement de bande

Publications (1)

Publication Number Publication Date
EP2330603A1 true EP2330603A1 (fr) 2011-06-08

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ID=42112056

Family Applications (1)

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EP09015033A Withdrawn EP2330603A1 (fr) 2009-12-04 2009-12-04 Transformateur doté d'un enroulement de bande

Country Status (1)

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EP (1) EP2330603A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012210802A1 (de) * 2012-06-26 2014-01-02 Siemens Aktiengesellschaft Spulenanordnung und Verfahren zur Herstellung sowie Verwendung der Spulenanordnung mit Kühlung
WO2021151468A1 (fr) 2020-01-28 2021-08-05 Magnebotix Ag Bobine électromagnétique à perméabilité à l'agent de refroidissement

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585276A (en) * 1968-11-08 1971-06-15 B S & W Whitley Ltd Transformer insulation construction comprising concentric cylinders and spacing sticks
DE2430035A1 (de) * 1974-06-22 1976-01-08 Transformatoren Union Ag Wicklungen fuer transformatoren, drosselspulen und dergleichen
DE2842061A1 (de) * 1978-09-27 1980-04-03 Transformatoren Union Ag Wicklung, insbesondere oberspannungswicklung fuer verteilungstransformatoren
EP0049382A1 (fr) * 1980-09-25 1982-04-14 Transformatoren Union Aktiengesellschaft Dispositif d'enroulement pour transformateurs à section du noyau quadratique
JPS59132606A (ja) * 1983-01-20 1984-07-30 Takaoka Ind Ltd 条コイル及びその製造方法
JPH08316052A (ja) * 1995-05-24 1996-11-29 Meidensha Corp 箔巻線変圧器
EP1255258A1 (fr) * 2001-04-19 2002-11-06 Siemens Aktiengesellschaft Dispositif d'enroulement électrique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585276A (en) * 1968-11-08 1971-06-15 B S & W Whitley Ltd Transformer insulation construction comprising concentric cylinders and spacing sticks
DE2430035A1 (de) * 1974-06-22 1976-01-08 Transformatoren Union Ag Wicklungen fuer transformatoren, drosselspulen und dergleichen
DE2842061A1 (de) * 1978-09-27 1980-04-03 Transformatoren Union Ag Wicklung, insbesondere oberspannungswicklung fuer verteilungstransformatoren
EP0049382A1 (fr) * 1980-09-25 1982-04-14 Transformatoren Union Aktiengesellschaft Dispositif d'enroulement pour transformateurs à section du noyau quadratique
JPS59132606A (ja) * 1983-01-20 1984-07-30 Takaoka Ind Ltd 条コイル及びその製造方法
JPH08316052A (ja) * 1995-05-24 1996-11-29 Meidensha Corp 箔巻線変圧器
EP1255258A1 (fr) * 2001-04-19 2002-11-06 Siemens Aktiengesellschaft Dispositif d'enroulement électrique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012210802A1 (de) * 2012-06-26 2014-01-02 Siemens Aktiengesellschaft Spulenanordnung und Verfahren zur Herstellung sowie Verwendung der Spulenanordnung mit Kühlung
WO2021151468A1 (fr) 2020-01-28 2021-08-05 Magnebotix Ag Bobine électromagnétique à perméabilité à l'agent de refroidissement

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