EP2102968A1 - Tige conductrice pour le stator d'un générateur ainsi que son procédé de fabrication - Google Patents

Tige conductrice pour le stator d'un générateur ainsi que son procédé de fabrication

Info

Publication number
EP2102968A1
EP2102968A1 EP08701395A EP08701395A EP2102968A1 EP 2102968 A1 EP2102968 A1 EP 2102968A1 EP 08701395 A EP08701395 A EP 08701395A EP 08701395 A EP08701395 A EP 08701395A EP 2102968 A1 EP2102968 A1 EP 2102968A1
Authority
EP
European Patent Office
Prior art keywords
conductor bar
fleece
conductor
layer
tape
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Withdrawn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
EP08701395A
Other languages
German (de)
English (en)
Inventor
Thomas Dr. Baumann
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.)
General Electric Technology GmbH
Original Assignee
Alstom 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 Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP2102968A1 publication Critical patent/EP2102968A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
    • 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
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing

Definitions

  • the present invention relates to the field of rotary electric machines. It relates to a conductor bar for the stator of a generator according to the preamble of claim 1 and to a method for producing such a conductor bar.
  • a conductor bar 10 includes a plurality of sub-conductors 1 1, which are surrounded by an insulation 12.
  • the insulation consists of wound up Glass / mica tapes, which are impregnated in a so-called vacuum-pressure process (see also: H sequence. "Production of windings of electrical machines” Springer Verlag 1973, P 150- 154).
  • the mica is present as so-called mica paper 14, which is applied to a glass silk fabric or glass fabric 15 for the purpose of improving the mechanical strength.
  • Mica is a mineral that belongs to the group of phyllosilicates. This layered atomic structure makes mica crystals macroscopically very platelike.
  • the mica paper 14 consists of a plurality of stacked and stacked platelets, which are all substantially in one plane.
  • the glass / mica tapes 13 are wound in an overlapping manner in several layers axially on the conductor bar. Since the electric field is mostly radial to the rod axis, the platelets are oriented perpendicular to the field direction. In this direction mica flakes have a very high electrical strength, which is then transferred by the similar orientation of the plates on the entire insulation.
  • the shears produce large cavities which are bad for two reasons:
  • the first layer is often wound down with the glass, and the second and subsequent layers with the mica down.
  • the mica paper 14 When winding "with the mica outwards" the mica paper 14 is bent strongly over the edges, whereby it usually breaks up. As a result, the mica platelets at least partially lose their orientation and thus weaken the electrical strength.
  • the intermediate layer comprises a non-woven, which preferably consists of glass fibers or thermoplastic synthetic fibers, in particular PET, or carbon fibers or a mixed nonwoven thereof, in particular carbon fibers and thermoplastic synthetic fibers or carbon and glass fibers ,
  • the fleece can be applied in particular to a glass / mica tape and thus be part of a three-layer tape, which simultaneously forms the first layer of the insulation.
  • the three-layer tape is wound around the partial conductors at least in the straight section, wherein the three-layer tape is preferably wound in the straight section of the conductor bar in shock.
  • the intermediate layer consists of a layer sequence of conductive polyester fleece and an overlying fabric tape.
  • the conductor bar has a straight portion, a band of conductive polyester nonwoven is wound around the conductor at least in the straight portion.
  • the polyester fleece is single-layered spirally and preferably wound on impact around the partial conductors.
  • a web of conductive polyester fleece is wound with the longitudinal axis parallel to the longitudinal axis of the conductor bar in such a shock to the sub-conductor that a gap extending in the axial direction between the adjacent longitudinal edges of the web.
  • the conductor bar has a substantially rectangular cross section with narrow sides and broad sides, and the conductive polyester nonwoven is glued to the narrow sides by means of a conductive resin with the sub-conductors.
  • the conductive polyester nonwoven can be glued to the sub-conductors by means of a thermosetting silicone elastomer on the broad sides of the conductor bar.
  • the conductive polyester fleece is separated from the sub-conductors by a release agent.
  • An embodiment of the inventive method is characterized in that a fleece is applied as an intermediate layer, and that for applying the fleece of the green bar is wrapped with a three-layer tape containing the nonwoven.
  • Another possibility is to first wrap a band or a web of conductive polyester fleece or carbon fiber fleece around the green bar to form the intermediate layer, and to wind a layer of a separating and absorbent fabric tape over the fleece.
  • the conductor bar has a substantially rectangular cross section with narrow sides and broad sides, the greenish bar on the narrow sides is preferably coated with a conductive resin for the purpose of coupling the nonwoven prior to the application of the nonwoven.
  • thermosetting silicone elastomer can be applied before the application of the nonwoven on the broad sides of the green bar, or it is applied to the broad sides of the green bar, a release agent before applying the nonwoven.
  • Fig. 1 is a simplified cross-section through a known per se
  • Fig. 2 shows the simplified (not true to scale) cross section through a
  • Fig. 3 shows a detail of the cross section through a conductor bar according to a first embodiment of the invention with a
  • Fig. 3 is a detail of a cross section through a conductor bar according to a first embodiment of the invention reproduced.
  • the first layer is not wound with a glass / mica tape 13, but a thin layer of a nonwoven fabric 17.
  • This nonwoven fabric 17 may be made of either glass fibers or thermoplastic synthetic fibers (e.g., PET) or carbon fibers.
  • the fleece 17 is applied as the lowest layer on a glass / mica tape in the arrangement (from inside to outside) fleece / mica / glass.
  • Such three-layer belts 16 with PET fleece are commercially available and are now used for manual post-insulation of joints.
  • This first layer with the three-layer tape 16 can be wound either over the entire bar or only over the straight part or section of the bar, where the electrical load and the thermomechanical load by tangential forces is greatest.
  • the thickness of the layer is reduced (good for the heat conduction) and the first layer of mica (14) is optimally parallel to the rod surface (with overlapping winding always occur places where the mica orientation also has radial components).
  • FIGS. 4, 5 and 6, wherein in each of these figures, different steps in the production of the conductor bar are reproduced.
  • the method according to FIG. 4 is based on a green bar 10a with a substantially rectangular cross-section which comprises a plurality of partial conductors 11 and whose end faces are filled with conductive cement 19 (FIG. 4a).
  • thermosetting silicone elastomer 20 is applied on the broad sides of the unconsolidated green bar 10a.
  • the narrow sides of the green bar 10 a are not coated with the silicone elastomer 20.
  • the narrow sides coated with a conductive resin 21 Figure 4b.
  • the applied layers are shown in Fig. 4 for clarity with exaggerated thickness.
  • a conductive band of polyester nonwoven fabric 22 is wound in a single layer in a spiral (FIG. 4c).
  • the winding should preferably be push-butt (i.e., without overlap).
  • a layer of fabric tape 23 is wound as a separating and absorbing belt (FIG. 4d). Then he rod is solidified in the usual way in the hot press.
  • the conductive polyester nonwoven 22 is bonded to the rod; superfluous silicone elastomer 20 is squeezed out and taken up by the fabric band 23.
  • the layer of glued conductive fleece (22) may either extend over the entire rod or (preferably) only over the straight part (section).
  • the conductor bar 10 is insulated and impregnated in the usual manner with glass / mica tape 13 (glass fabric 15 upwards for all layers) in a conventional manner (FIG. 4e).
  • Conductive PES nonwovens with a thickness of 0.1 mm are commercially available and are used for so-called "round-packing" of bars. These bands can be used either in their original width (typically 100mm) or narrower. Also on the market are thin carbon fiber webs down to a thickness of 30 microns.
  • the silicone elastomer 20 is pressed on the end faces of the conductor 1 1 to zero thickness.
  • the adhesion between rod and Leitvlies (22) is effected by the remaining in the gussets between the sub-conductors 1 1 silicone elastomer 20. This achieves that the additional thickness is reduced to the simple thickness of the Leitvlieses (22), ie, for example, 0.1 mm.
  • the silicone elastomer 20 is capable of absorbing mechanical stress without cracking. As a result, an improved adhesion of the insulation is achieved on the rod and reduces the risk of cavitation. Should it once to a replacement of the Bar come in the silicone elastomer layer, there is still the advantage that this cavity is thanks to the conductive fleece potential-free and thus free of partial discharges.
  • FIG. 5 A variant of the method shown in Fig. 4 is shown in Fig. 5, wherein like parts are provided with the same reference numerals.
  • the process according to FIG. 5 runs analogously to that of FIG. 4, except that instead of a spirally wound band of conductive polyester fleece 22, the straight part of the rod is now wrapped with large webs of conductive fleece.
  • the length of the web corresponds to the length of the straight part (section) of the rod, and the width of the web corresponds to the rod circumference or is (preferably) slightly smaller.
  • FIG. 6 Another variant of the method shown in Fig. 4 is shown in Fig. 6, again with like parts are designated by like reference numerals.
  • the green bar 10 a can be unbonded or already solidified. An adhesive bond between the conductive Leitvlies 22 and the green bar 10a takes place only on the narrow sides (again with conductive resin 21).

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulating Bodies (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne une tige conductrice (10) pour le stator d'un générateur comprenant une pluralité de conducteurs élémentaires (11) intérieurs, qui sont entourés à l'extérieur d'une isolation (12), comprenant des feuilles de verre/mica (13) imprégnées et enroulées autour des conducteurs élémentaires (11). L'invention vise à améliorer l'adhérence mécanique entre les conducteurs élémentaires (11) et l'isolation (12). A cet effet, au moins une couche intermédiaire (17) est prévue entre l'isolation (12) et les conducteurs élémentaires (11).
EP08701395A 2007-01-18 2008-01-10 Tige conductrice pour le stator d'un générateur ainsi que son procédé de fabrication Withdrawn EP2102968A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00067/07A CH699023B1 (de) 2007-01-18 2007-01-18 Leiterstab für den Stator eines Generators sowie Verfahren zu seiner Herstellung.
PCT/EP2008/050249 WO2008087093A1 (fr) 2007-01-18 2008-01-10 Tige conductrice pour le stator d'un générateur ainsi que son procédé de fabrication

Publications (1)

Publication Number Publication Date
EP2102968A1 true EP2102968A1 (fr) 2009-09-23

Family

ID=37951741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08701395A Withdrawn EP2102968A1 (fr) 2007-01-18 2008-01-10 Tige conductrice pour le stator d'un générateur ainsi que son procédé de fabrication

Country Status (7)

Country Link
US (2) US7893358B2 (fr)
EP (1) EP2102968A1 (fr)
JP (1) JP2010517497A (fr)
CN (1) CN101584101A (fr)
CA (1) CA2675821A1 (fr)
CH (1) CH699023B1 (fr)
WO (1) WO2008087093A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008000073A1 (de) * 2008-01-17 2009-07-23 Alstom Technology Ltd. Leiterstab für eine rotierende elektrische Maschine
US8278795B2 (en) * 2009-09-18 2012-10-02 Siemens Energy, Inc. Voltage grading structure in a high-voltage stator coil of an electromotive machine
EP2403112A1 (fr) * 2010-07-02 2012-01-04 Alstom Technology Ltd Barre de stator
US8097996B1 (en) 2011-06-24 2012-01-17 Dantam K Rao Thermally conductive ground wall insulation for a stator bar
CN102296424A (zh) * 2011-08-22 2011-12-28 海宁永大电气新材料有限公司 一种防电晕低阻带及其制造方法
US8866361B2 (en) * 2011-10-17 2014-10-21 GM Global Technology Operations LLC Bar conductor shapes for electric machines
US20130093280A1 (en) * 2011-10-17 2013-04-18 GM Global Technology Operations LLC Multi-filar bar conductors for electric machines
EP2645373A1 (fr) * 2012-03-26 2013-10-02 Siemens Aktiengesellschaft Matériau pour système d'isolation, système d'isolation, protection contre l'effet de couronne et machine électrique
EP2869435A1 (fr) * 2013-11-05 2015-05-06 Siemens Aktiengesellschaft Agencement d'isolation, moyen de fonctionnement électrique et machine électrique ayant une durée de vie accrue
JP6635935B2 (ja) * 2014-03-20 2020-01-29 ゼネラル エレクトリック テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングＧｅｎｅｒａｌ Ｅｌｅｃｔｒｉｃ Ｔｅｃｈｎｏｌｏｇｙ ＧｍｂＨ 絶縁材料及び製造方法
US9059616B1 (en) * 2014-08-20 2015-06-16 Dantam K. Rao Insulation system for a stator bar with low partial discharge
EP3269540A1 (fr) * 2016-07-15 2018-01-17 Von Roll Schweiz AG Matériau composite compressible et souple utile en particulier comme matériau de construction pour batteries
EP3503354A1 (fr) * 2017-12-20 2019-06-26 Siemens Aktiengesellschaft Isolation des conducteurs partiels d'une machine dynamoélectrique
EP3793068A1 (fr) * 2019-09-12 2021-03-17 GE Renewable Technologies Barre de conducteur

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DE2004228A1 (de) * 1970-01-30 1971-08-05 Licentia Gmbh Verfahren und Vorrichtung zum Impraegnieren eines bahn- oder bandfoermigen poroesen Traegerkoerpers mit einer elektrisch leitende Teilchen enthaltenden Harzlack-Dispersion
DE2320828A1 (de) * 1973-04-25 1974-11-14 Schorch Gmbh Nutenglimmschutz fuer hochspannungswicklungen elektrischer maschinen
US4865905A (en) * 1983-06-23 1989-09-12 Raychem Corporation Article for protection of a substrate
DE4244298C2 (de) * 1992-12-28 2003-02-27 Alstom Isolierband und Verfahren zu seiner Herstellung
US5723920A (en) * 1994-10-12 1998-03-03 General Electric Company Stator bars internally graded with conductive binder tape
DE19536209A1 (de) * 1995-09-28 1996-12-12 Siemens Ag Kombiband zur gleichzeitigen Herstellung einer Isolierung und eines Glimmschutzes und damit umwickelter elektrischer Leiter
WO1997027661A1 (fr) * 1996-01-25 1997-07-31 ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft Procede de fabrication d'un systeme isolant haute tension pour machines electriques
DE19720555A1 (de) * 1997-05-16 1998-11-19 Abb Research Ltd Statorwicklungsisolierung
US6288341B1 (en) * 1998-02-27 2001-09-11 Hitachi, Ltd. Insulating material windings using same and a manufacturing method thereof
DE19817287A1 (de) 1998-04-18 1999-10-21 Abb Research Ltd Wicklungsstab für die Hochspannungswicklung einer elektrischen Maschine sowie Verfahren zur Herstellung eines solchen Wicklungsstabes
US6043582A (en) * 1998-08-19 2000-03-28 General Electric Co. Stable conductive material for high voltage armature bars
DE19860412A1 (de) * 1998-12-28 2000-06-29 Abb Research Ltd Innenglimmschutz für Statorleiter in Motoren und Generatoren
DE10023207A1 (de) * 2000-05-12 2001-11-15 Alstom Power Nv Isolierung von Spulen
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Also Published As

Publication number Publication date
CA2675821A1 (fr) 2008-07-24
US20110109186A1 (en) 2011-05-12
JP2010517497A (ja) 2010-05-20
US7893358B2 (en) 2011-02-22
WO2008087093A1 (fr) 2008-07-24
CH699023B1 (de) 2010-01-15
US20100007226A1 (en) 2010-01-14
CN101584101A (zh) 2009-11-18

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