WO2008087093A1 - Leiterstab für den stator eines generators sowie verfahren zu seiner herstellung - Google Patents
Leiterstab für den stator eines generators sowie verfahren zu seiner herstellung Download PDFInfo
- Publication number
- WO2008087093A1 WO2008087093A1 PCT/EP2008/050249 EP2008050249W WO2008087093A1 WO 2008087093 A1 WO2008087093 A1 WO 2008087093A1 EP 2008050249 W EP2008050249 W EP 2008050249W WO 2008087093 A1 WO2008087093 A1 WO 2008087093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- conductor bar
- fleece
- conductor
- layer
- tape
- Prior art date
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
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002675821A CA2675821A1 (en) | 2007-01-18 | 2008-01-10 | Conductor bar for the stator of a generator and method for its production |
JP2009545892A JP2010517497A (ja) | 2007-01-18 | 2008-01-10 | 発電機のステータのための導体バー、及び、その生産方法 |
EP08701395A EP2102968A1 (de) | 2007-01-18 | 2008-01-10 | Leiterstab für den stator eines generators sowie verfahren zu seiner herstellung |
US12/502,350 US7893358B2 (en) | 2007-01-18 | 2009-07-14 | Conductor bar for the stator of a generator, and method for its production |
US13/006,502 US20110109186A1 (en) | 2007-01-18 | 2011-01-14 | Conductor bar for the stator of a generator and method for its production |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00067/07 | 2007-01-18 | ||
CH00067/07A CH699023B1 (de) | 2007-01-18 | 2007-01-18 | Leiterstab für den Stator eines Generators sowie Verfahren zu seiner Herstellung. |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/502,350 Continuation US7893358B2 (en) | 2007-01-18 | 2009-07-14 | Conductor bar for the stator of a generator, and method for its production |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008087093A1 true WO2008087093A1 (de) | 2008-07-24 |
Family
ID=37951741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/050249 WO2008087093A1 (de) | 2007-01-18 | 2008-01-10 | Leiterstab für den stator eines generators sowie verfahren zu seiner herstellung |
Country Status (7)
Country | Link |
---|---|
US (2) | US7893358B2 (de) |
EP (1) | EP2102968A1 (de) |
JP (1) | JP2010517497A (de) |
CN (1) | CN101584101A (de) |
CA (1) | CA2675821A1 (de) |
CH (1) | CH699023B1 (de) |
WO (1) | WO2008087093A1 (de) |
Cited By (5)
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 |
US20110068643A1 (en) * | 2009-09-18 | 2011-03-24 | Emery Franklin T | Voltage Grading Structure in a High-Voltage Stator Coil of an Electromotive Machine |
EP2403112A1 (de) * | 2010-07-02 | 2012-01-04 | Alstom Technology Ltd | Statorstab |
WO2015067396A1 (de) * | 2013-11-05 | 2015-05-14 | Siemens Aktiengesellschaft | Isolieranordnung, elektrisches betriebsmittel und elektrische maschine mit erhöhter lebensdauer |
WO2015140007A1 (en) * | 2014-03-20 | 2015-09-24 | Alstom Technology Ltd | An insulation material and a method to produce |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 (de) * | 2012-03-26 | 2013-10-02 | Siemens Aktiengesellschaft | Material für Isolationssystem, Isolationssystem, Außenglimmschutz und eine elektrische Maschine |
US9059616B1 (en) * | 2014-08-20 | 2015-06-16 | Dantam K. Rao | Insulation system for a stator bar with low partial discharge |
EP3269540A1 (de) * | 2016-07-15 | 2018-01-17 | Von Roll Schweiz AG | Komprimierbares und flexibles verbundstoffmaterial zur verwendung insbesondere als ein baumaterial für batterien |
EP3503354A1 (de) * | 2017-12-20 | 2019-06-26 | Siemens Aktiengesellschaft | Isolierung von teilleitern einer dynamoelektrischen maschine |
EP3793068A1 (de) * | 2019-09-12 | 2021-03-17 | GE Renewable Technologies | Stromschiene |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
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 (de) * | 1996-01-25 | 1997-07-31 | ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft | Verfahren zur herstellung eines hochspannungsisoliersystems für elektrische maschinen |
DE19860412A1 (de) * | 1998-12-28 | 2000-06-29 | Abb Research Ltd | Innenglimmschutz für Statorleiter in Motoren und Generatoren |
US6288341B1 (en) * | 1998-02-27 | 2001-09-11 | Hitachi, Ltd. | Insulating material windings using same and a manufacturing method thereof |
EP1154542A1 (de) * | 2000-05-12 | 2001-11-14 | ALSTOM Power N.V. | Isolierung von Spulen |
GB2406721A (en) * | 2003-10-02 | 2005-04-06 | Gen Electric | Extruded insulation secured arround a stator bar |
Family Cites Families (6)
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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 |
DE19720555A1 (de) * | 1997-05-16 | 1998-11-19 | Abb Research Ltd | Statorwicklungsisolierung |
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 |
-
2007
- 2007-01-18 CH CH00067/07A patent/CH699023B1/de not_active IP Right Cessation
-
2008
- 2008-01-10 CN CN200880002522.8A patent/CN101584101A/zh active Pending
- 2008-01-10 EP EP08701395A patent/EP2102968A1/de not_active Withdrawn
- 2008-01-10 WO PCT/EP2008/050249 patent/WO2008087093A1/de active Application Filing
- 2008-01-10 CA CA002675821A patent/CA2675821A1/en not_active Abandoned
- 2008-01-10 JP JP2009545892A patent/JP2010517497A/ja not_active Withdrawn
-
2009
- 2009-07-14 US US12/502,350 patent/US7893358B2/en not_active Expired - Fee Related
-
2011
- 2011-01-14 US US13/006,502 patent/US20110109186A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 (de) * | 1996-01-25 | 1997-07-31 | ISOVOLTA Österreichische Isolierstoffwerke Aktiengesellschaft | Verfahren zur herstellung eines hochspannungsisoliersystems für elektrische maschinen |
US6288341B1 (en) * | 1998-02-27 | 2001-09-11 | Hitachi, Ltd. | Insulating material windings using same and a manufacturing method thereof |
DE19860412A1 (de) * | 1998-12-28 | 2000-06-29 | Abb Research Ltd | Innenglimmschutz für Statorleiter in Motoren und Generatoren |
EP1154542A1 (de) * | 2000-05-12 | 2001-11-14 | ALSTOM Power N.V. | Isolierung von Spulen |
GB2406721A (en) * | 2003-10-02 | 2005-04-06 | Gen Electric | Extruded insulation secured arround a stator bar |
Cited By (7)
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 |
US20110068643A1 (en) * | 2009-09-18 | 2011-03-24 | Emery Franklin T | Voltage Grading Structure in a High-Voltage Stator Coil of an Electromotive Machine |
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 (de) * | 2010-07-02 | 2012-01-04 | Alstom Technology Ltd | Statorstab |
WO2015067396A1 (de) * | 2013-11-05 | 2015-05-14 | Siemens Aktiengesellschaft | Isolieranordnung, elektrisches betriebsmittel und elektrische maschine mit erhöhter lebensdauer |
WO2015140007A1 (en) * | 2014-03-20 | 2015-09-24 | Alstom Technology Ltd | An insulation material and a method to produce |
US9926222B2 (en) | 2014-03-20 | 2018-03-27 | General Electric Technology Gmbh | Insulation material and a method to produce |
Also Published As
Publication number | Publication date |
---|---|
CH699023B1 (de) | 2010-01-15 |
US20100007226A1 (en) | 2010-01-14 |
US7893358B2 (en) | 2011-02-22 |
US20110109186A1 (en) | 2011-05-12 |
JP2010517497A (ja) | 2010-05-20 |
EP2102968A1 (de) | 2009-09-23 |
CA2675821A1 (en) | 2008-07-24 |
CN101584101A (zh) | 2009-11-18 |
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