EP3430707A1 - Elektrische maschine sowie verfahren zum auseinderbauen und herstellen der elektrischen maschine - Google Patents
Elektrische maschine sowie verfahren zum auseinderbauen und herstellen der elektrischen maschineInfo
- Publication number
- EP3430707A1 EP3430707A1 EP17710720.8A EP17710720A EP3430707A1 EP 3430707 A1 EP3430707 A1 EP 3430707A1 EP 17710720 A EP17710720 A EP 17710720A EP 3430707 A1 EP3430707 A1 EP 3430707A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrically conductive
- laminated core
- machine according
- main insulation
- conductive layer
- 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- Withdrawn
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
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
Definitions
- a high voltage machine such as a Turbogener ⁇ generator in a power plant for generating electrical energy is exposed to high mechanical, thermal and electrical stress.
- the turbo generator has in particular a laminated core and a winding electric Lei ⁇ ter.
- the conductors are surrounded by a main insulation, which electrically isolates the conductors against each other, against the laminated core and against the environment.
- a weakly conductive and grounded external corona shield is provided between the main insulation and the laminated core.
- the laminated core together with the winding can be immersed in a bath with an impregnating resin in an all-pot process under the application of vacuum.
- the main insulation and the outer corona protection are impregnated by the impregnating resin.
- the impregnating resin is cured, in particular under a pressurization.
- the object of the invention is therefore an electric machine, a method for disassembly of the electric machine and to provide a method of manufacturing the electrical machine, wherein electrical conductors of the electrical machine are easily removable therefrom.
- US 6,140,733 discloses a conductor winding configuration for a large electric machine.
- the electric machine according to the invention has a elekt ⁇ step ladder, an enveloping the conductor main insulation, a main insulation enveloping outer corona, a laminated core having grooves into which the conductor is introduced, and an electrically conductive layer which is disposed radially outside the outer corona and is set to connect the Jardinglimmschutz with the laminated core electrically conductive, the liabilities of main insulation, external corona protection, electrically conductive layer and laminated core are matched to one another such that there is the lowest adhesion to a surface of the electrically conductive layer.
- the electrically conductive layer By providing the electrically conductive layer, a separation on the surface of the electrically conductive layer will take place when removing the electrical conductor with the main insulation and the outer corona protection from the grooves. This prevents any residues of the external corona shield from sticking to the laminated core.
- the electrical conductor together with the main insulation and the outer corona protection can be more easily removed from the grooves than is the case with conventional electrical machines.
- the electrically conductive layer has a lower specific electrical resistance than the external corona protection. This advantageously ensures that The external corona shield is electrically connected to the earthed laminated core and thus also earthed.
- the electrically conductive layer egg NEN lubricating varnish and / or a tape said tape Tef lon ⁇ , polyethylene, polyethylene derivatives, polyoxymethylene, and / or having Polyoxymethylenderivate.
- the bonded coating may be introduced listed on the surface of the laminated core and / or on the ra dial ⁇ outside surface of the outer corona case, for example, by spraying. By providing the lubricating varnish and / or the band, the electrical conductor together with the main insulation and the external glow protection can be removed particularly easily.
- the bonded coating preferably comprises polyvinyl acetate, epoxy resin, novolak, Teflon and / or novolak epoxy resin.
- the bonded coating is preferably temperature resistant up to 130 ° C. As a result, the bonded coating is advantageously not attacked during impregnation.
- the lubricating varnish comprises graphite. By the graphite of the lubricating varnish is elekt ⁇ driven conductive, and simultaneously has a low adhesion with the outer corona and / or the laminated core.
- the tape has a silicone coating.
- the tape preferably comprises a fabric, in particular ⁇ sondere a fabric with flat yarns and / or a film. The flat yarns cause a good contact of the fabric with the laminated core, whereby a penetration of the
- Impregnating resin between the fabric and the laminated core before ⁇ is partially reduced. It is preferred that the fabric is impregnable and / or the film perforated and / or der- is wound on the redesignglimmschutz that between two adjacent turns a gap is provided. By providing the perforation and / or the gap, as well as in the case of the fabric, the impregnating resin can penetrate from radially outside into the outer corona shield and into the main insulation.
- the tape preferably comprises two layers of the film, wherein the Fo ⁇ lie is perforated such that the two layers of displaced zuei ⁇ Nander are perforated. By providing two layers, the electrical conductor together with the main insulation and the external corona protection can be removed particularly easily.
- a return flow of the impregnating resin from the main insulation into the space between the foil and the laminated core is advantageously made more difficult, as a result of which bonding of the foil to the laminated core is less likely.
- the tape soot particles, graphite particles, carbon fibers and / or electrically semi-conductive particles, especially SiC particles, metal oxide particles and / or Me ⁇ talloxiden coated mica particles and / or aluminum oxide particles has.
- the elekt ⁇ generic conductivity of the tape can be produced particularly easily.
- the particles in the band percolating present which means that they form a Runaway ⁇ Hendes network from the one surface side of the tape to the other surface side of the tape.
- the laminated core has lamellae which protrude into the grooves at different distances, wherein only a part of the lamellae is in contact with the strip, wherein the part is formed by lamellae protruding far into the grooves.
- a cavity is arranged between the other part of the slats and the band, in which the impregnating resin can be distributed during impregnation. From the cavity then the
- Impregnating resin penetrate into the outer corona protection and into the main insulation. It is preferred that the dimensions of the electrical conductor, the main insulation, the outer corona protection and the grooves are selected such that the tape is pressed against the laminated core. This can when impregnating no impregnating resin penetrate between the far protruding lamellae and the strip, whereby adhesion between the far protruding lamellae and the strip is prevented and the electrically conductive connection of the strip and the lamination packet is maintained even during impregnation.
- the main insulation and the outer glow protection are impregnated by an impregnating resin and the impregnating resin is cured, wherein no impregnating resin is located at locations where the electrically conductive layer electrically conductively connects the outer corona shield to the laminated core.
- the method according to the invention for producing the electrical machine comprises the steps of introducing an electrical conductor, a main insulation surrounding the conductor and an outer corona shield surrounding the main insulation in slots in a laminated core of the electrical machine, wherein an electrically conductive layer is located radially outside the outer corona shield is provided, which is adapted to connect theticianglimmschutz electrically conductive with the laminated core; Impregnating the main insulation and the external corona shielding with an impregnating resin; Curing the
- the electrically conductive layer are applied to the laminated core before the Lei ⁇ ter is introduced into the groove together with the main insulation and the outer corona.
- the electrically conductive layer can be brought radially outward onto the outer corona protection before the conductor is introduced into the groove together with the main insulation and the outer corona protection.
- Figures 7 to 9 different windings of a film.
- the Blechpa- ket has slats 6 which extend differently far into the Nu ⁇ th.
- the lamellae 6 are distinguished into exposed lamellae 7, which protrude far into the grooves, and recessed camels 8, which project into the grooves less far than the exposed lamellae 6.
- the electrical equipment according to figures 1 to 4 and 5 have an electrically conductive layer 16 which is disposed radially outward of the outer corona ⁇ half 3 and is adapted to connect the outer corona shield 3 with the laminated core 4 is electrically conductive.
- the electrically conductive layer 16 has a lower electrical resistivity than the external corona protection 3.
- the adhesions of main insulation 2, external corona protection 3, electrically conductive layer 16 and Laminated core 4 are matched such that 16 the lowest adhesion present at ei ⁇ ner surface of the electrically conductive layer.
- the electrically conductive layer 16 may include egg ⁇ NEN bonded coating.
- the bonded coating 16 may be disposed on the surface of the laminated core 4 and / or on the surface of the Au ⁇ .glimmtikes. 3
- the electrically conductive layers 16 of the electrical machines according to FIGS. 2 to 4 have an electrically conductive band 5, the band 5 being Teflon, polyethylene,
- Polyethylene derivatives polyoxymethylene and / or
- the tape 5 has for its electrical conductivity of carbon black particles, graphite particles, carbon fibers and / or electrically semi-conductive particles, especially SiC particles, metal oxide particles and / or Me ⁇ talloxiden coated mica particles and / or aluminum oxide particles on.
- the band 5 may have a silicon-containing and electrically conductive coating.
- the loading stratification has for its electrical conductivity Rußparti ⁇ kel, graphite particles, carbon fibers and / or electrically semi-conductive particles, especially SiC particles, metal oxide particles and / or metal oxide-coated mica Parti ⁇ angle and / or aluminum oxide particles on. As can be seen from FIG.
- the impregnating resin 9 Penetrate the impregnating resin 9 and penetrate from there into the outer corona protection 3 and into the main insulation 2. This is illustrated in FIG. 4 by the path 13.
- the dimensions of the electrical conductor 1, the main insulation 2, the personallyglimm- protection 3 and the grooves are chosen such that the tape 5 is pressed against the laminated core 4.
- the impregnating resin 9 can not get to contact points of the tape 5 with the lamination stack during herstel ⁇ len the electrical machine. This is illustrated in FIG. 4 by the path 14.
- the impregnating resin 9 which has penetrated into the cavities between the laminated core 4 and the band 5 does not interfere with the removal of the electrical conductor 1 together with the main insulation 2 and the external corona shield 3 because the exposed laminations 7 are free of impregnating resin and thus a weakened or feh ⁇ lende mechanical connection between the belt 5 and the laminated core 4 is ensured.
- the band 5 of the electric machine according to FIG. 3 has a tissue, wherein the tissue Teflon, polyethylene,
- Polyethylene derivatives polyoxymethylene and / or
- the fabric is such ge ⁇ staltet that it can be impregnated by an impregnating resin. 9
- the fabric may further comprise flat yarns.
- the band 5 of the electric machine according to FIG. 4 has a foil, wherein the foil Teflon, polyethylene,
- Polyethylene derivatives polyoxymethylene and / or
- the film is perforated with perforation holes 15 and / or wound on the external anti-corrugation 3 in such a way that between two adjacent windings fertilize a gap is provided.
- FIGS. 7 to 9 Some such examples are shown in FIGS. 7 to 9, wherein the band may also have point-bonded foils according to FIG. 9.
- the elekt ⁇ generic machine according to Figure 4 has an inner layer 11 and an outer layer 12 of the film, wherein the film is such perfo ⁇ riert that the perforation holes 15 of the two layers 11, 12 are arranged offset to one another.
- the external corona shielding 3 of the electrical machine according to FIG 5 has an applied directly to the main insulation 2 personallyglimmterrorisminnenlage 18, a radially disposed outside the intendglimmterrorisminnenlage 18 incidentglimmschutzau ⁇ Hzlage 19 and a valve disposed between the intendglimmstoffinnenlage 18 and the disorderglimmschutzau presentlage 19 mica tape 20.
- the disorderglimmstoffterrorisminnenlage 18 and the disorderglimm ⁇ protective outer layer 19 are slightly electrically conductive.
- the mica tape 20 includes mica on, is electrically insulating and provides mechanical decoupling of the contemplatglimm ⁇ protective inner layer 18 and the structuredglimmtikau contlage 19.
- an electrically conductive contact strip 21 is provided which alternately radially inside and radially outside of the mica tape 20 is arranged.
- the electrically conductive layer 16 may be provided between the outer corona shield 3 and the laminated core 4.
- the electrically conductive layer 16 is formed here of the film, wherein two layers 11, 12 of the film are provided.
- the impregnating resin comprises an epoxy resin.
- the epoxy resin comprises, for example, bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, phenol novolacs, aliphatic epoxides and / or cycloaliphatic epoxides. It is further preferred that the epoxy resin comprises a cyclic carboxylic acid anhydride, in particular
- the main insulation 2 and / or the external corona protection 3 have mica, in particular in the form of a mica paper.
- the mica can be coated with metal oxides, in particular with semiconducting metal oxides.
- the electrical conductor 1, the main insulation 2 and the outer corona shield 3 are removed from the grooves, wherein when removing a separation of the outer corona shield 3 and the electrically conductive layer 16 and / or a separation of the electrically conductive layer 16 and the laminated core 4 takes place.
- a method for producing the electrical machine is to be carried out as follows: introduction of an electrical conductor 1, a main insulation 2 enclosing the conductor 1 and an external corona protection 3 enveloping the main insulation 2 in slots in a laminated core 4 of the electrical system
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16166838.9A EP3240150A1 (de) | 2016-04-25 | 2016-04-25 | Elektrische maschine sowie verfahren zum auseinanderbauen und herstellen der elektrischen maschine |
PCT/EP2017/055785 WO2017186401A1 (de) | 2016-04-25 | 2017-03-13 | Elektrische maschine sowie verfahren zum auseinderbauen und herstellen der elektrischen maschine |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3430707A1 true EP3430707A1 (de) | 2019-01-23 |
Family
ID=55808499
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16166838.9A Withdrawn EP3240150A1 (de) | 2016-04-25 | 2016-04-25 | Elektrische maschine sowie verfahren zum auseinanderbauen und herstellen der elektrischen maschine |
EP17710720.8A Withdrawn EP3430707A1 (de) | 2016-04-25 | 2017-03-13 | Elektrische maschine sowie verfahren zum auseinderbauen und herstellen der elektrischen maschine |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16166838.9A Withdrawn EP3240150A1 (de) | 2016-04-25 | 2016-04-25 | Elektrische maschine sowie verfahren zum auseinanderbauen und herstellen der elektrischen maschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20190131841A1 (de) |
EP (2) | EP3240150A1 (de) |
JP (1) | JP2019520029A (de) |
CN (1) | CN109075646A (de) |
WO (1) | WO2017186401A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022125503A (ja) * | 2021-02-17 | 2022-08-29 | シンフォニアテクノロジー株式会社 | 回転電機 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6268030A (ja) * | 1985-09-20 | 1987-03-27 | Toshiba Corp | 回転電機巻線 |
WO1991001059A1 (de) * | 1989-07-10 | 1991-01-24 | Siemens Aktiengesellschaft | Leiterwicklungsanordnung für eine elektrische grossmaschine |
JPH05284682A (ja) * | 1992-03-31 | 1993-10-29 | Toshiba Corp | 回転電機の電機子巻線 |
DE4219064A1 (de) * | 1992-06-11 | 1993-12-16 | Asea Brown Boveri | Glimmschutzanordnung für die Statorwicklung einer elektrischen Maschine |
JPH0670499A (ja) * | 1992-08-10 | 1994-03-11 | Central Japan Railway Co | 高圧回転機の固定子コイル |
US6140733A (en) * | 1996-05-15 | 2000-10-31 | Siemens Aktiengesellschaft | Conductor winding configuration for a large electrical machine |
ATE211592T1 (de) * | 1996-05-15 | 2002-01-15 | Voith Siemens Hydro Power | Leiterwicklungsanordnung für eine elektrische grossmaschine |
US6140773A (en) * | 1996-09-10 | 2000-10-31 | The Regents Of The University Of California | Automated control of linear constricted plasma source array |
CN101154848A (zh) * | 1997-12-18 | 2008-04-02 | 三菱电机株式会社 | 回转电机的定子线圈 |
JP2000050552A (ja) * | 1998-07-28 | 2000-02-18 | Toyota Motor Corp | 回転電機 |
CN1338141A (zh) * | 1999-01-18 | 2002-02-27 | 西门子公司 | 导电体,涡轮发电机以及用于为一个导电体建立外部辉光放电保护的方法 |
JP2007174816A (ja) * | 2005-12-22 | 2007-07-05 | Mitsubishi Electric Corp | 回転電機の固定子、およびその製造方法 |
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 |
DE102014219439A1 (de) * | 2014-09-25 | 2016-03-31 | Siemens Aktiengesellschaft | Glimmschutzsystem für eine elektrische Maschine |
EP3480923B1 (de) * | 2016-07-01 | 2022-04-27 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Verfahren zur herstellung einer coronaentladungsverhindernden struktur, coronaentladungsverhindernde struktur und elektrische drehmaschine |
US10693338B2 (en) * | 2018-03-23 | 2020-06-23 | General Electric Company | System and method for suppressing surface discharges on conductive windings of an electric machine |
-
2016
- 2016-04-25 EP EP16166838.9A patent/EP3240150A1/de not_active Withdrawn
-
2017
- 2017-03-03 US US16/095,509 patent/US20190131841A1/en not_active Abandoned
- 2017-03-13 CN CN201780025652.2A patent/CN109075646A/zh active Pending
- 2017-03-13 EP EP17710720.8A patent/EP3430707A1/de not_active Withdrawn
- 2017-03-13 JP JP2019506777A patent/JP2019520029A/ja active Pending
- 2017-03-13 WO PCT/EP2017/055785 patent/WO2017186401A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3240150A1 (de) | 2017-11-01 |
JP2019520029A (ja) | 2019-07-11 |
WO2017186401A1 (de) | 2017-11-02 |
CN109075646A (zh) | 2018-12-21 |
US20190131841A1 (en) | 2019-05-02 |
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