WO2009152858A1 - Conducteur torsadé pour un enroulement d’une machine électrique - Google Patents

Conducteur torsadé pour un enroulement d’une machine électrique Download PDF

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Publication number
WO2009152858A1
WO2009152858A1 PCT/EP2008/057767 EP2008057767W WO2009152858A1 WO 2009152858 A1 WO2009152858 A1 WO 2009152858A1 EP 2008057767 W EP2008057767 W EP 2008057767W WO 2009152858 A1 WO2009152858 A1 WO 2009152858A1
Authority
WO
WIPO (PCT)
Prior art keywords
conductor
insulating
sub
drill according
winding
Prior art date
Application number
PCT/EP2008/057767
Other languages
German (de)
English (en)
Inventor
Martin Mairinger
Alexander Gregori
Peter Hamberger
Original Assignee
Siemens Transformers Austria Gmbh & Co Kg
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 Transformers Austria Gmbh & Co Kg filed Critical Siemens Transformers Austria Gmbh & Co Kg
Priority to PCT/EP2008/057767 priority Critical patent/WO2009152858A1/fr
Publication of WO2009152858A1 publication Critical patent/WO2009152858A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H02K3/14—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
    • 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
    • H01F27/2823—Wires
    • 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
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • 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
    • H01F27/2823—Wires
    • H01F2027/2838—Wires using transposed wires

Definitions

  • the invention relates to a drill guide for a winding of an electrical machine, in particular a
  • drill ladders are used instead of ladders of large cross-section to reduce electric eddy current losses in electrical engineering in high-power machines.
  • a drill ladder is composed of partial or single conductors, which are insulated from each other. The parts are twisted or twisted together in a form similar to a mesh. This twisting or stranding is referred to in the literature after the inventor as “single conductor transposition Roebel", or “Verroebelung” for short.
  • Drill ladders are also used in the manufacture of electrical windings for power transformers.
  • a low-voltage winding or a high-voltage winding of a power transformer can be formed, for example, from seven to eighty stranded partial conductors.
  • the sub-conductors consist of flat profile wires. These profile wires are stacked in two adjacent sub-conductor stacks. In each sub-ladder stack, the profile wires lie with their broad sides on top of each other. In each case the uppermost and the lowermost profiled wire is so bent in the direction of its narrow side in regularly recurring intervals, so that a change takes place from one sub-conductor stack to the other sub-conductor stack. This change takes place without turning of the broad surface, only by a bending in the same direction around the longitudinal extension of the drill around, while maintaining the Generalleiter Highway in repetitive cycles. Each sub-conductor performs a helical flight and thus passes through all height layers of the overall conductor stack.
  • the cohesion of the individual conductors in the total conductor stack is usually carried out with a Umbandelung.
  • the mutual electrical insulation of the individual sub-conductors usually consists of a coating of the metal wire with an insulating varnish, for example with a polyvinyl acetal or polyamide-imide varnish.
  • a drill ladder in which for the purpose of better circulation of the coolant on a flat side of a sub-conductor stack, an existing of an insulating spacer is arranged.
  • a so-called Roebel tool is used to form the crank, which bends the conductor in regularly recurring intervals. The mechanical deformation of a partial conductor leads to an expansion of the insulating lacquer layer in the
  • the thickness of the insulating lacquer has hitherto been chosen to be large enough that, in spite of the weakening caused by the offset, the overall insulation property of the coil is ensured.
  • Insulating varnish the so-called fill factor, which is the proportion of the current-carrying material based on the total space required by the winding.
  • the paint insulation can claim a share of about 8% of the total volume of the drill.
  • the drill guide can be made of single conductors having a comparatively thin insulating varnish thickness. This has the advantage that, while maintaining the insulating property of the
  • a better fill factor means that the dimensions and material usage of an electric machine can be reduced. Even a small reduction in dimensions leads to significant savings in soft magnetic core and conductor material in a large electrical machine, such as a power transformer. The material saving reduces the manufacturing costs.
  • the insulating element consists simply of a flat insulating piece, which in the Kröpfungs Scheme between adjacent broad surfaces of the cranked outer sub-conductor and the sub-conductor stack is interposed.
  • the material for the insulator own conventional insulation materials.
  • the insulator may be a strip of insulation paper. The expert is for this purpose a variety of insulation materials for selection.
  • the flat insulating piece / insulation paper is rectangular. Its width is greater than the width of the sub-conductor; their length is greater than the length of the Kröpfungsabêtes. As a result, the flat insulating piece / insulating paper projects beyond the low-insulation bent area. As a result, a reliable isolation effect is achieved despite the vibrations occurring during operation of a power transformer. The good insulation effect is maintained over a long service life.
  • Another embodiment which is advantageous with regard to the use of material can be characterized in that the insulating piece is designed in the form of a sector of an annular surface.
  • the insulating piece is coated on at least one side with an adhesive. This ensures that when winding the transformer winding on a support cylinder, the interposed insulating does not slip. Furthermore, there is a cost advantage, since the additional insulation by automatic
  • Handling tools can be easily introduced in the drill wire production in the composite of the sub-conductor. In order to maintain good insulating properties over a long service life, it may also be beneficial to use aromatic polyamides as the insulating material for the flat insulating piece.
  • Aramid fibers and films are commercially available under the trade name Nomex TM and Kevlar TM.
  • a crimping area between laid insulation wafer or insulating strip for example, an insulating paper strip having a thickness of less than 0.15 mm has proven to be particularly cost-effective.
  • Insulating varnish is formed, which is applied in the offset area at least part of the area on a broad surface of the cranked sub-conductor or the sub-conductor stack.
  • this partial Isolierlack- order be an insulating paint point, which can preferably be applied by means of an automatic metering device. It may also be advantageous to apply several such insulating lacquer points in the offset area.
  • Solid particles as spacers or spacers For example, spherical solid particles having a mean diameter of about 0.15 mm have been found to be particularly favorable.
  • Figure 1 shows a drill according to the invention in an embodiment in a perspective view
  • Figure 2 is a plan view of Figure 1, in which according to a first variant of the invention, the insulating element is designed as a rectangular insulating strip;
  • Figure 3 is a plan view of Figure 1, in which, according to a second variant of the invention, the insulating element is formed from a partially applied in the offset region Isolierlack point;
  • FIG. 4 shows a transformer winding produced with a drill conductor according to FIG. 1 in a half-cut representation of the winding on a transformer arm;
  • Figure 5 shows a drill guide in an enlarged view in a section along the line II in Figure 1;
  • FIG. 6 shows a sketch of the core of a three-arm transformer, in which the reduction in dimensions made possible by the drill conductor according to the invention is indicated.
  • FIG. 1 shows a perspective view of an embodiment of a drill guide 10 according to the invention.
  • the drill guide 10 shown consists of twenty-one entangled partial conductors 20.
  • the partial conductors 20 have a rectangular cross-section and are coated with insulating lacquer.
  • the sub-conductors 20 are stacked in two sub-conductor stacks 3 and 4. They lie with their broadsides on top of each other. Their facing flat sides are also in the stack together.
  • the partial conductor 21 located at the upper end 5 of the overall conductor stack 3, 4 is cranked: a first cranking section 22 directs the partial conductor 21 first in the direction of the right partial conductor stack 4, then a second offset section 23 in the direction of the longitudinal extension 7.
  • a first cranking section 22 directs the partial conductor 21 first in the direction of the right partial conductor stack 4, then a second offset section 23 in the direction of the longitudinal extension 7.
  • Sub-conductor stack instead (in Figure 1 and 2, the overhead sub-conductor 21 changes from the left sub-conductor stack 3 to the right sub-conductor stack 4).
  • the individual sub-conductors 20 seen from the side of the stack obliquely to the direction of the arrow 7: in the sub-conductor stack 3 from the lower end 6 to the upper end 5; in the sub-conductor stack 4 from the upper end 5 obliquely to the lower end 6.
  • Figure 2 or 3 the rectangular
  • FIG. 2 shows a first variant of the invention, in which the insulating element 11 or 12 is a solid.
  • the flat insulating member 11 is placed under the crank 1 and the insulating member 12 under the crank 2, so that each wide surface of the Kröpfungsabête 22, 23 to the stack 3 and 4 each have a reinforced insulation.
  • These insulating or insulating pieces 11 and 12 are coated on one side with an adhesive and consist in the present embodiment of an insulation paper strip.
  • Each insulator 11 or 12 can also be made of a different organic or inorganic material with a high electrical resistance.
  • the insulating piece may be a non-woven, a glass fiber fabric or an inserted Isoaltor platelets.
  • the insulating piece 11, 12 may also be a macro-polyamide.
  • Aramid fiber or a film is commercially available, for example, under the trade name Nomex TM from DuPont.
  • these insulating pieces 11 and 12 can be seen in a plan view.
  • the Kröpfungsabête 22 and 23 are underlaid in the embodiment shown with a rectangular strip of paper.
  • the width of the rectangular insulation is greater than the width of the sub-conductor 21 and longer than the Kröpfungsabêt.
  • the insulating piece 11 or 12 could also be shaped differently, for example, have the shape of a segment of an annular circuit surface or be trapezoidal.
  • FIG. 3 shows a second variant of the invention, in which the insulating element is not a solid, but an insulating lacquer point 11 or 12 applied during the winding production.
  • the insulating element is not a solid, but an insulating lacquer point 11 or 12 applied during the winding production.
  • a plurality of such insulating lacquer points 11, 12 can also be provided .
  • FIG. 4 shows a transformer winding in a half-cut representation. It consists of a low-voltage winding 17 and a high-voltage winding 18.
  • the low-voltage winding 17 consists of a first layer 15 and a second layers 16 of the drill guide 10.
  • a core leg of the transformer is designated by the reference numeral 19, the outer diameter of the lower voltage winding 17th As in one below
  • the invention allows winding diameter 19 can be reduced to the winding diameter 19 ".
  • FIG. 5 shows the drill guide 10 according to FIG. 4 enlarged in a cutaway view.
  • the drill 10 is as already stated from rectangular paint-insulated profile wires 20. These are in two Sub-conductor stack 3 and 4 arranged so that opposite broad sides 8 abut each other in a stack. Likewise, the sub-conductors 20 of one stack with the other stack facing narrow sides 9 abut each other. Between the wide surface 13 of the outer layer of the conductor 20 and the wide surface 14 of the transverse element conductor 21 is at one end 5 and at the other end 6 respectively an inventive insulating piece 11 and 111 interposed.
  • the insulating element is here a sheet-like insulating strip which is wider than the width of a partial conductor. Also at the other end 6 of the sub-conductor stack is a sheet-like insulating strip 111.
  • the drill guide 10 is surrounded by a bundle insulation 25 formed from a Textilumwicklung.
  • a significant advantage of the invention is the fact that a partial conductor can be used by the partial insulation according to the invention in Kröpfungs Kunststoff in which the thickness of the paint insulation is relatively low.
  • a winding is compared with a drill guide according to the invention.
  • This drill ladder also consists of 70 partial or single ladders.
  • At both ends 5 and 6 of the sub-conductor stack 4,5 (as drawn in Figure 5 for a drill ladder consisting of 34 individual conductors) each have an additional sheet-like insulation 11, 111 of 0.1 mm thickness.
  • the required degree of insulating property is restored, although the insulating lacquer layer of the single conductor is only half as thick throughout, namely 0.05 mm.
  • the difference of the total paint thickness is 1.6 mm. This means that the diameter of the undervoltage winding per drill wire position can be made smaller by 3.2 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Of Coils (AREA)

Abstract

L’invention concerne un conducteur torsadé pour un enroulement d’une machine électrique, notamment pour un enroulement de transformateur, lequel est constitué de conducteurs partiels plats (20) individuels, isolés les uns des autres qui sont empilés dans des piles de conducteurs partiels (3, 4) disposées les unes à côté des autres. Selon l’invention, les conducteurs partiels (21) qui se trouvent à une extrémité (5, 6) d’une pile de conducteurs partiels (3, 4) sont coudés dans une section de coudage (22, 23), ce qui réalise un changement du conducteur partiel (21) d’une pile de conducteurs partiels à l’autre. Toujours selon l’invention, un élément isolant (11, 12) est disposé dans la section de coudage (22, 23) correspondante entre les surfaces larges voisines du conducteur partiel (21) et la pile de conducteurs partiels (3, 4).
PCT/EP2008/057767 2008-06-19 2008-06-19 Conducteur torsadé pour un enroulement d’une machine électrique WO2009152858A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/057767 WO2009152858A1 (fr) 2008-06-19 2008-06-19 Conducteur torsadé pour un enroulement d’une machine électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/057767 WO2009152858A1 (fr) 2008-06-19 2008-06-19 Conducteur torsadé pour un enroulement d’une machine électrique

Publications (1)

Publication Number Publication Date
WO2009152858A1 true WO2009152858A1 (fr) 2009-12-23

Family

ID=40843287

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/057767 WO2009152858A1 (fr) 2008-06-19 2008-06-19 Conducteur torsadé pour un enroulement d’une machine électrique

Country Status (1)

Country Link
WO (1) WO2009152858A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017221593A1 (de) 2017-11-30 2019-06-06 Siemens Aktiengesellschaft Wicklungsanordnung
CN111613425A (zh) * 2020-05-21 2020-09-01 韩富生 换位导线标准中其结构示意及其标注和线芯外形尺寸计算的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490705A1 (fr) * 1990-12-14 1992-06-17 Westinghouse Electric Corporation Méthode de fabrication d'une isolation à charge diélectrique réduite pour bobines à haute tension comportant des barreaux Roebel
WO1994007251A1 (fr) * 1992-09-16 1994-03-31 Asta Eisen- Und Metallwarenerzeugungs-Gesellschaft M.B.H. Conducteur torsade
US5352117A (en) * 1993-07-06 1994-10-04 The Silva Group Method and apparatus for attaching a dental model to an articulator
WO2000033443A1 (fr) * 1998-12-02 2000-06-08 Siemens Westinghouse Power Corporation Procede de reduction des decharges dans la matiere de charge de bobines de stator tressees (roebel) haute tension

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490705A1 (fr) * 1990-12-14 1992-06-17 Westinghouse Electric Corporation Méthode de fabrication d'une isolation à charge diélectrique réduite pour bobines à haute tension comportant des barreaux Roebel
WO1994007251A1 (fr) * 1992-09-16 1994-03-31 Asta Eisen- Und Metallwarenerzeugungs-Gesellschaft M.B.H. Conducteur torsade
US5352117A (en) * 1993-07-06 1994-10-04 The Silva Group Method and apparatus for attaching a dental model to an articulator
WO2000033443A1 (fr) * 1998-12-02 2000-06-08 Siemens Westinghouse Power Corporation Procede de reduction des decharges dans la matiere de charge de bobines de stator tressees (roebel) haute tension

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017221593A1 (de) 2017-11-30 2019-06-06 Siemens Aktiengesellschaft Wicklungsanordnung
CN111613425A (zh) * 2020-05-21 2020-09-01 韩富生 换位导线标准中其结构示意及其标注和线芯外形尺寸计算的方法

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