EP2533257B1 - Transformatorwicklung - Google Patents

Transformatorwicklung Download PDF

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Publication number
EP2533257B1
EP2533257B1 EP11004703.2A EP11004703A EP2533257B1 EP 2533257 B1 EP2533257 B1 EP 2533257B1 EP 11004703 A EP11004703 A EP 11004703A EP 2533257 B1 EP2533257 B1 EP 2533257B1
Authority
EP
European Patent Office
Prior art keywords
winding
transformer
turns
transformer winding
conductor
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.)
Active
Application number
EP11004703.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2533257A1 (de
Inventor
Benjamin Weber
Burak Esenlik
Frank Cornelius
Jens Tepper
Abdelbahi Tamzarti
Roland Hoffmann
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 EP11004703.2A priority Critical patent/EP2533257B1/de
Priority to PL11004703T priority patent/PL2533257T3/pl
Publication of EP2533257A1 publication Critical patent/EP2533257A1/de
Application granted granted Critical
Publication of EP2533257B1 publication Critical patent/EP2533257B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/082—Devices for guiding or positioning the winding material on the former
    • H01F41/086—Devices for guiding or positioning the winding material on the former in a special configuration on the former, e.g. orthocyclic coils or open mesh coils

Definitions

  • the invention relates to a transformer winding, comprising a strip conductor with a rectangular-like cross-section and external insulation, which is wound in a plurality of both multi-layer radially superimposed and axially adjacent turns arranged around a winding axis, so that a hollow cylindrical winding body is formed.
  • power transformers are used in power supply networks, for example to couple a voltage level of 30 kV to a voltage level of 6 kV.
  • the voltage levels mentioned are relatively small for power grids, which may also have voltage levels of 380kV and higher.
  • dry-type transformers are used there, whose nominal power can be, for example, a few 100kVA to 10MVA and higher. Due to the relatively low nominal voltage, in particular on the low voltage side, depending on the rated power of the transformer with correspondingly high currents to be expected, for example, with several hundred amps.
  • the cross section of the winding conductor In order to be able to conduct these high currents electrically, the cross section of the winding conductor must be selected to be correspondingly high.
  • the use of a winding conductor with a rectangular cross-section has proved to be advantageous, because so the filling factor of the available winding window of a Transformer core, on which the transformer winding is disposed opposite to a winding conductor with a round cross-section is used in an improved manner.
  • the fill factor is determined by the ratio of conductor material filled and the available space for the transformer winding. Ideally, the available space is filled as much as possible with conductor material.
  • the performance of a transformer can be advantageously increased for a given external dimension.
  • Such a winding conductor with a rectangular cross-section which is also called a strip conductor, may for example have a thickness of 7 mm and a width of 16 mm.
  • the conductor as such is usually made of copper or aluminum and surrounded by an insulating layer, for example, an insulating varnish.
  • This insulating layer is dimensioned such that a voltage stress, as occurs in the operation of the winding, for example, between two adjacent turns, for example, 100V, is held, whereas in adjacent winding layers, the voltage stress is so great that, disadvantageously, an additional insulating layer between adjacent Winding layers is to be introduced.
  • the WO 2006/126829 A1 discloses a transformer for a light source, which has a winding of a winding conductor with a round cross-section, wherein the winding conductor is wound around a winding axis such that oblique winding disks are formed. As a result, the insulation stress between the conductors of adjacent winding disks is reduced compared to axially extending winding layers.
  • a similar transformer for the backlighting of an LCD display is also used in the US 2002/0140538 A1 disclosed.
  • the EP 2003660 A1 discloses a transformer with a comparable winding scheme and a winding conductor with a round cross-section.
  • a transformer winding according to claim 1 This is characterized in that by radially superposed turns respective flush radial gaps are formed and the wound strip conductor is guided at least in the majority of turns in a change to an adjacent column in an adjacent winding layer and vice versa, so that parallel oblique winding disks are formed.
  • the basic idea of the invention is to use a winding conductor with a rectangular cross-section and to arrange or wind it in such a way that both additional insulation layers are avoided and a high filling factor is ensured in the end regions of the winding.
  • a matrix-like arrangement of the turns of the winding conductor is provided around the winding axis, namely in flush radial gaps of the respective conductor cross-section, wherein a plurality of radial columns are arranged side by side.
  • the available winding space is maximally utilized, that is achieved a high fill factor.
  • Such an arrangement is possible only with a winding conductor with a rectangular cross section, but not with a round conductor.
  • winding conductor guide Due to the winding conductor guide according to the invention, namely the preferably simultaneous change of a row and a column after circulation of a respective turn in the respective winding arrangement, obliquely extending parallel winding disks are formed whose length is shorter than the length of a wound over the entire axial length of the transformer winding turntable. Between adjacent winding disks with a simultaneously optimized filling factor of the winding window, a lower voltage stress is given than between adjacent windings Wraps.
  • the voltage stress between adjacent winding conductors of different winding disks or winding layers corresponds to the voltage increase per turn during operation of the winding multiplied by the number of turns to the electrical connection point therebetween.
  • the hollow cylindrical winding body is accordingly limited to at least one of its two axial ends by an end surface formed by flush radially superimposed windings so as to increase the fill factor, ie the ratio of space filled and available with conductor material optimize.
  • shortened oblique winding disks are formed at the axial ends of the hollow cylindrical winding body, which are not performed on all winding layers. This is particularly advantageous in the end regions of the hollow cylindrical winding body, so as to fill in the corner regions and thus to further increase the fill factor or to allow an end face formed by a radially superimposed windings arranged one above the other.
  • this also has windings in which the wound strip conductor remains in the same winding layer when changing into an adjacent gap, so that an axially extending winding region is formed, whose axial length is shorter than the axial length of the winding Winding body, wherein arranged according to a further variant of the invention, at least two axially extending winding areas radially one above the other are.
  • the thickness of a transformer winding or of a winding cross section formed by the wound winding conductor is normally significantly smaller than the axial length of a transformer winding. Therefore, in the oblique arrangement with a radial component, it is relatively easy to achieve a small number of turns per winding disk, which usually corresponds at least in the axially middle region of the transformer winding to the number of winding layers. This has an advantageous effect on a reduced stress load.
  • a further variant of the invention is that a respective insulation layer is provided between adjacent winding disks and / or radially superposed axial winding areas.
  • This is an optional additional solution in the event that the insulation of the winding conductor is not sufficient for the insulation between adjacent winding layers or winding disks, for example due to a very high nominal voltage. In the event that such an insulating layer should be necessary, however, this is correspondingly thinner perform.
  • insulation material for example, a wound resin-impregnated (glass) fiber roving is suitable, which is then baked in the further manufacturing process of the transformer winding.
  • the hollow cylindrical winding body comprises a further, galvanically separated hollow cylindrical winding, which connects radially outside or radially inside.
  • This is, for example, a high-voltage winding, which cooperates with the underlying and then used as a low-voltage winding transformer winding during operation of the transformer.
  • a hollow cylindrical cooling passage is provided between the two windings, which in operation of the transformer winding, the resulting Dissipates heat loss.
  • This can of course also be in the form of a plurality of annularly arranged segment-like individual channels.
  • the insulating medium oil also acts as a cooling medium.
  • a transformer winding according to the invention also become apparent for a transformer comprising at least one transformer core and a transformer winding according to the invention.
  • a transformer is designed in three phases in order to be able to be used in typical power distribution networks.
  • Fig. 1 shows a section through an exemplary first transformer winding 10.
  • a winding axis 38 Arranged around a winding axis 38 is a hollow cylindrical transformer winding, which is formed from a plurality of turns of a winding conductor, wherein the beginning of the winding conductor by the reference numeral 12 and the end of the winding conductor by the reference numeral 14 is.
  • the winding conductor is arranged in a matrix-like manner radially around the winding axis 38, that is to say in respective flush radial gaps 22, 24, 26 and respective adjacent winding layers 16, 18, 20.
  • the winding sense of the winding conductor - ie not the conductor course itself - is characterized by a dashed line which extends meandering between the beginning 12 and end 14 of the winding conductor.
  • the first turn begins in the sectional view at the bottom left with the reference numeral 12 and goes at its end, ie after 360 °, into the second turn, which begins in the same winding layer 16 in the second radial gap 24.
  • parallel oblique winding disks are formed by the respective column and position offset, of which an exemplary winding disk is designated by the reference number 30.
  • a change takes place to the respective adjacent winding disk, as indicated by the reference numerals 32, 34 and 36.
  • a distance between adjacent turns is indicated in the radial and axial directions, which in reality is only marginally present, if at all.
  • the winding conductor is coated according to the invention with a layer of insulating varnish, so that adjacent turns are insulated from each other.
  • the almost identical cross-sectional contour necessarily present on the other side of the rotation axis 38 is shown simplified with a rectangle with the reference number 46.
  • the hollow cylindrical winding body formed by the winding conductor is fitted into a hollow cylindrical bobbin 40 adapted in shape.
  • the existing space within the bobbin 38 space is exploited by the selected winding conductor arrangement to a large extent, so that a correspondingly high fill factor is given.
  • the perpendicular to the winding axis extending end faces are indicated at the cross-sectional contour by the reference numerals 42 and 44.
  • Fig. 2 shows a partial section through an exemplary second transformer winding 50. This corresponds essentially to the transformer winding from the previous figure, but has a changed sense of winding on.
  • axially extending winding regions are formed within the first three left-hand radial radial gaps, as indicated by the reference numerals 58 and 60. These go on their side facing away from the first end face 64 of the transformer winding on in oblique winding disks, which are indicated by the reference numerals 52, 54, 56.
  • the winding disk with the reference numeral 56 is shortened, so as well as in fill the figure shown on the right top of the transformer winding and thus increase the fill factor.
  • the second end face of the transformer winding is indicated by the reference numeral 62.
  • Fig. 3 shows a ribbon conductor 70 with a rectangular-like cross-section, which has an inner conductor 72 made of copper or aluminum and which is surrounded by an insulating layer 74.
  • the height of such a strip conductor is for example 2mm to 10mm and the width, for example, 7mm to 30mm.
  • the thickness of the insulation layer is - depending on requirements - for example, 50 .mu.m to 200 .mu.m.
  • Fig. 4 shows a side view of a part of a schematically very simplified illustrated third transformer winding 80.
  • a winding axis 82 To a winding axis 82 are arranged at a radial distance and adjacent to each other, a first 84, a second 86 and a third winding 88 of a winding conductor.
  • a position change between the various turns is schematically indicated by the reference numerals 90 and 92.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP11004703.2A 2011-06-09 2011-06-09 Transformatorwicklung Active EP2533257B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11004703.2A EP2533257B1 (de) 2011-06-09 2011-06-09 Transformatorwicklung
PL11004703T PL2533257T3 (pl) 2011-06-09 2011-06-09 Uzwojenie transformatora

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11004703.2A EP2533257B1 (de) 2011-06-09 2011-06-09 Transformatorwicklung

Publications (2)

Publication Number Publication Date
EP2533257A1 EP2533257A1 (de) 2012-12-12
EP2533257B1 true EP2533257B1 (de) 2015-03-04

Family

ID=44786684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11004703.2A Active EP2533257B1 (de) 2011-06-09 2011-06-09 Transformatorwicklung

Country Status (2)

Country Link
EP (1) EP2533257B1 (pl)
PL (1) PL2533257T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105280361A (zh) * 2015-11-17 2016-01-27 国家电网公司 干式变压器高压线圈及其绕制方法和干式变压器

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE829334C (de) 1950-02-21 1952-01-24 Blaupunkt Werke Gmbh Spulenwickelverfahren und Spulenwickelmaschine zur Ausfuehrung dieses Verfahrens
CA2231656A1 (en) * 1995-09-14 1997-04-03 Thomas L. Linsenbardt An insulated conductor and process for making an insulated conductor
DE19809572C2 (de) * 1998-03-05 2000-06-21 Siemens Ag Gießharz-Transformator
KR100815890B1 (ko) * 2001-03-31 2008-03-24 엘지.필립스 엘시디 주식회사 코일 권선방법과 이를 이용하여 코일이 권선된 트랜스포머및 액정표시장치의 인버터
JP2006332341A (ja) * 2005-05-26 2006-12-07 Minebea Co Ltd 高圧トランス
JP4771931B2 (ja) * 2006-12-25 2011-09-14 株式会社日東電機 多層整列巻コイル
CN101325120A (zh) * 2007-06-15 2008-12-17 台达电子工业股份有限公司 变压器及其线圈绕线方法

Also Published As

Publication number Publication date
PL2533257T3 (pl) 2015-08-31
EP2533257A1 (de) 2012-12-12

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