EP1815578A1 - Capot de protection - Google Patents

Capot de protection

Info

Publication number
EP1815578A1
EP1815578A1 EP05803267A EP05803267A EP1815578A1 EP 1815578 A1 EP1815578 A1 EP 1815578A1 EP 05803267 A EP05803267 A EP 05803267A EP 05803267 A EP05803267 A EP 05803267A EP 1815578 A1 EP1815578 A1 EP 1815578A1
Authority
EP
European Patent Office
Prior art keywords
housing
spring
dressing
spring device
cap according
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Withdrawn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
EP05803267A
Other languages
German (de)
English (en)
Inventor
Paulo Gomes De Lima
Pierre Hallet
Celine Mahieux
Ulrich Wagner
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.)
GE Renewable Technologies Wind BV
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 EP1815578A1 publication Critical patent/EP1815578A1/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Withdrawn legal-status Critical Current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
    • H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto

Definitions

  • the invention relates to a cap for a dressing of two electrically connected ends of two winding bars of a stator of an electric machine.
  • the invention also relates to a stator provided with such covers.
  • a stator winding of individual winding bars in particular in a generator or in an electric motor, for example a power plant, a stator winding of individual winding bars, so-called Roebel bars, constructed, which are led out at the axial ends of the stator and connected to each other in a suitable manner For example, to form poles of the winding.
  • two winding rods are electrically conductively connected to each other at their ends, for example soldered together.
  • the interconnected ends form a bandage, which must be protected from the outside and in particular electrically insulated.
  • caps of the type mentioned are used, which are plugged for this purpose on the respective association.
  • Such a cap comprises an electrically insulating housing, which in assembled state wrapped around the respective bandage circumferentially closed.
  • Such caps may have a closed-sided housing or a housing open on both sides.
  • a cap with one-sided closed housing can be attached, for example, to the respective dressing and then with an adhesive, in particular resin, poured out.
  • the bandage can be wrapped with an adhesive, in particular synthetic resin, impregnated cord before the cap is placed. Both variants are extremely time-consuming and require careful handling in order to avoid contamination of the environment, in particular of the stator, with the adhesive.
  • the invention deals with the problem of providing for a cover or for a stator equipped therewith an improved embodiment, in particular, the assembly of the cap is simplified.
  • the invention is based on the general idea to fix the cap on the bandage by spring tension.
  • the invention proposes to equip the housing with a spring device which makes it possible to attach the housing to the dressing, and which, when plugged in, generates a holding force sufficient for the housing firmly fixed to the dressing.
  • the cap according to the invention can be mounted particularly simple and clean on each association.
  • the assembly of the stator or the interconnected ends of the winding bars can thus be carried out particularly quickly.
  • the effort to mount the covers and thus the stator is thereby considerably simplified.
  • the spring means may comprise at least one spring which is provided with a semiconductive coating to reduce the corona effect.
  • the corona effect which can occur at the usually uninsulated ends of the winding bars in the bandage, be reduced or avoided within the cap.
  • FIG. 1 is an axial view of a stator
  • FIG. 2 is a perspective view of two winding bars, 3 shows a longitudinal section through a dressing with cap,
  • Fig. 4 is a longitudinal section as in Fig. 3, but at another
  • Fig. 5 is a longitudinal section as in Fig. 3, but in another
  • Fig. 6 is a longitudinal section as in Fig. 3, but in a rotated by 90 ° cutting plane.
  • a stator 1 comprises an electrical machine, not shown, for example, a generator or an electric motor, preferably a power plant, a stator winding 2, which is composed of a plurality of individual winding bars 3, which led out of the stator 1 axially are.
  • a stator winding 2 which is composed of a plurality of individual winding bars 3, which led out of the stator 1 axially are.
  • two winding rods 3 are electrically conductively connected to each other at their ends 4, wherein the interconnected ends 4 form a dressing 5.
  • Such a dressing 5 is covered in the stator 1 according to the invention with a cap 6.
  • Fig. 2 shows two winding bars 3, which are electrically conductively connected to each other at their ends 4 shown in Fig. 2 right, in particular soldered or welded together, and said dressing 5 form.
  • the cap 6 is not shown in Fig. 2.
  • the winding bars 3 can be connected to the ends of other winding bars in basically the same way.
  • These winding bars 3 are usually so-called “Roebel bars”.
  • such a cap 6 has a housing 7 and a spring device 8. In the assembled state, the cap 6 is attached to the respective dressing 5 and covers it from the outside.
  • the housing 7 expediently consists of an electrically insulating material, for example of plastic.
  • the housing 7, as in the embodiments of FIGS. 3, 4 and 6, may be closed at one end by means of a bottom 9 or be open on both sides according to the embodiment shown in FIG. In any case, the housing 7 enveloped in the assembled state, the dressing 5 circumferentially closed.
  • the spring device 8 is arranged in the interior of the housing 7.
  • the spring device 8 is designed such that the housing 7 can be attached to an open side 10 for mounting on the dressing 5. That is, the spring device 8 is designed so that it does not prevent the attachment of the cap 6 on the dressing 5. Furthermore, the spring device 8 is designed so that it is supported in the mounted state on the one hand on the dressing 5 and on the other hand on the housing 7. In addition, the spring device 8 is designed so that it generates a holding force in the assembled state, which determines the housing 7 on the dressing 5. The holding force is symbolized in FIGS. 3 to 5 by arrows and denoted by 11.
  • the spring device 8 has at least one spring 12. In the examples shown here is the
  • Spring device 8 each equipped with two springs 12.
  • the two springs 12 are arranged in the housing 7 so that they are diametrically opposite and thus positioned in the assembled state on both sides of the dressing 5. It is clear that the spring device 8 at another Embodiment with only a single spring 12 can get along and in other embodiments, more than two springs 12 may have.
  • the springs 12 are attached to the housing 7.
  • the springs 12 are glued into the housing 7.
  • the housing 7 is molded from plastic, in particular by means of an injection molding process, wherein the springs 12 are embedded in the plastic, so encapsulated or overmolded. The production of this cover 6 is simplified.
  • the springs 12 may be made of a conventional spring material, such as spring steel.
  • the springs 12 are made of a plastic suitable for this purpose, which may in particular be fiber-reinforced, carbon fiber and / or glass fibers being particularly suitable for fiber reinforcement.
  • the plastic may optionally be provided with an electrically conductive additive.
  • the springs 12 are semiconductive, which is advantageous for reducing the corona effect that can occur at the ends 4 in the region of the dressing 5.
  • the springs 12 may also be provided with a semiconducting coating, which also contributes to the reduction of the corona effect.
  • the springs 12 are configured as corrugated springs. Such corrugated springs 12 can with a relatively small
  • Expense can be shaped so that they can produce the desired Aufsteck and the desired holding power.
  • the springs 12 protrude into the interior of the housing 7, so that they are supported on the outside of the dressing 5 in the assembled state and thus tensioned are. In this way, the desired holding force is generated by the spring tension.
  • a transverse web 13 is formed, via which the two ends 4 are interconnected. Up to this crossbar 13, the two ends 4 are spaced from each other. A corresponding gap between the ends 4 is denoted by 14 in FIGS. 2 and 6. In the region of this transverse web 13, the electrical connection of the two ends 4 takes place. As can be seen further in FIGS. 2 and 6, the web 13 can at least partially be formed at least at one of the ends 4.
  • an undercut 15 is formed in the dressing 5, which is used in the cap 6 according to the invention of the spring means 8 for fixing the cap 6 on the dressing 5.
  • Such an undercut 15 can also be formed in another way, for example by a step on at least one of the ends 4 in a variant.
  • the springs 12 can be designed such that they engage behind the mentioned undercut 15 in the mounted state. Furthermore, the springs 12 are designed to produce a holding force 11 in the mounted state, comprising a component 16 represented by arrows, which is oriented so as to drive the housing 7 with its bottom 9 against a front end 17 of the dressing 5 , In the embodiments of FIGS. 3 and 4, the bottom 9 comes directly to said front end 17 to the plant and is supported thereon with a corresponding, by Arrows symbolized resulting force 18 from. In this way, the cap 6 is particularly effectively secured against removal from the dressing 5.
  • the bracing of the bottom 9 against the front end 15 may be replaced in another embodiment generally by a bracing of an inwardly projecting contour of the housing 7 against a corresponding mating contour of the dressing 5. Accordingly, this stressing principle can be readily realized even with a housing 7 open on both sides as in FIG. 5.
  • the springs 12 are here designed so that they generate a holding force 11 in the assembled state, which has a symbolized by an arrow component 19 which acts orthogonally on the housing 7 and / or on the dressing 5.
  • the orthogonal component 19 leads to a tension between the dressing 5 and the housing 7 transversely to the withdrawal direction. To remove the cap 6 then resulting friction forces must be overcome, which can be sufficiently large with appropriate material combinations.
  • the orthogonal component 19 with the aid of the two springs 12 causes the springs 12 to clamp the dressing between them in the mounted state. At the same time a centering of the cap 6 can be realized on the dressing 5, provided that the two springs 12 are configured correspondingly symmetrical.
  • FIG. 4 differs from that according to FIG. 3 in that, in the region of the transverse web 13, their springs 12 each have an additional contact zone for introducing the orthogonal component 19.
  • the withdrawal force ie the force that is required to remove the cap 6 again from the dressing 5
  • An additional securing of the cap 6 on the dressing 5 can be achieved by means of a bond 20.
  • the housing 7 can be additionally fixed to the dressing 5.
  • the spring device 8 is used for rapid assembly and realizes sufficient for mounting purposes peel strength.
  • the respective adhesive is expedient when applying the cap 6 already applied in the housing 7 at a suitable location and can then cure at a later time to realize the particular desired increased peel strength.
  • the adhesive connection 20 is arranged in the region of the bottom 9, whereby by means of
  • each spring 12 is supported orthogonally on the dressing 5 in a first contact zone in the region of the transverse web 13, and in a region of the ends 4 adjacent to the transverse web 13 via a corresponding second contact zone. In this way, sufficiently large pull-off forces can also be realized in order to realize the desired Aufsteckback for the cap 6.
  • the covering cap 6 according to the invention can be mounted particularly simply, since it only has to be attached to the dressing 5.
  • the cap 6 secures at the same time by the spring device 8 a desired positioning, in particular a centering, the cap 6 relative to the dressing 5 can be achieved.
  • the production cost for the stator 1 is thereby considerably simplified.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne un capot de protection (6) pour un assemblage (5) constitué de deux extrémités (4), reliées entre elles de manière électroconductrice, de deux barres d'enroulement (3) d'un stator d'une machine électrique. Le capot de protection selon l'invention comprend un boîtier isolant (7) qui, à l'état monté, enveloppe l'assemblage (5) en l'enfermant circonférentiellement. L'invention vise à simplifier le montage du capot de protection (6) sur l'assemblage (5). A cet effet, le capot de protection (6) comprend un dispositif à ressort (8) qui est placé à l'intérieur du boîtier (7), qui est réalisé de sorte que le boîtier (7) peut être enfiché sur l'assemblage (5) pour le montage et qui s'appuie à l'état monté, d'une part, sur l'assemblage (5) et, d'autre part, sur le boîtier (7), générant ainsi une force de maintien (11) fixant le boîtier (7) sur l'assemblage (5).
EP05803267A 2004-11-24 2005-11-14 Capot de protection Withdrawn EP1815578A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH19312004 2004-11-24
PCT/EP2005/055952 WO2006056542A1 (fr) 2004-11-24 2005-11-14 Capot de protection

Publications (1)

Publication Number Publication Date
EP1815578A1 true EP1815578A1 (fr) 2007-08-08

Family

ID=34974198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05803267A Withdrawn EP1815578A1 (fr) 2004-11-24 2005-11-14 Capot de protection

Country Status (6)

Country Link
US (1) US7503801B2 (fr)
EP (1) EP1815578A1 (fr)
JP (1) JP4928462B2 (fr)
CN (1) CN101065889B (fr)
CA (1) CA2587599C (fr)
WO (1) WO2006056542A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006056542A1 (fr) * 2004-11-24 2006-06-01 Alstom Technology Ltd Capot de protection
US7630204B2 (en) * 2005-03-28 2009-12-08 Sandisk Il Ltd. Detachable device holder
CH699576A1 (de) * 2008-09-29 2010-03-31 Alstom Technology Ltd Roebelstab für rotierende elektrische maschinen.
EP2451052A3 (fr) * 2010-11-09 2014-02-26 Alstom Technology Ltd Machine électrique, capuchon isolant et procédé de réalisation du capuchon isolant
CH704986A1 (de) * 2011-05-20 2012-11-30 Alstom Hydro France Isolierkappe für einen Wickelkopf einer mit Hochspannung arbeitenden elektrischen Maschine sowie Maschine mit einer solchen Isolierkappe.
CA2775458C (fr) * 2011-04-29 2017-09-12 Alstom Hydro France Capuchon isolant pour la developpante d'une machine electrique fonctionnant a tension elevee et machine munie d'un tel capuchon isolant
CN105051087A (zh) 2012-12-18 2015-11-11 巴斯夫欧洲公司 基于萘二酰亚胺-亚乙烯基-低聚噻吩-亚乙烯基聚合物的半导体材料
WO2014095724A1 (fr) 2012-12-19 2014-06-26 Basf Se Dérivés d'acide bisacylphosphinique, leur préparation et leur utilisation en tant que photo-initiateurs
DE102018203993A1 (de) * 2018-03-15 2019-09-19 Zf Friedrichshafen Ag Isoliereinheit für eine elektrische Maschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483310A (en) * 1968-04-23 1969-12-09 Ideal Ind Connector insulator
JPS6028733A (ja) * 1983-07-26 1985-02-13 Toshiba Corp 回転子巻線端部の絶縁方法
JPS61199145U (fr) * 1985-05-31 1986-12-12

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132202A (en) * 1962-01-22 1964-05-05 Vaco Products Co Closed end electrical connector
JPS5885778A (ja) * 1981-11-17 1983-05-23 本田技研工業株式会社 自動二輪車用フロントフオ−ク
JPS61199145A (ja) * 1985-03-01 1986-09-03 Hitachi Ltd 媒体制御方式
US4839470A (en) * 1987-12-21 1989-06-13 Ventura Robert M Underwater (submersible) joint or splice
US4849580A (en) * 1988-02-11 1989-07-18 Minnesota Mining And Manufacturing Company Environmental protection closure for wire splices; and method
JPH01286271A (ja) * 1988-05-12 1989-11-17 Nichifu Tanshi Kogyo:Kk 閉端接続子用絶縁被覆筒の製造方法
DE4237079C2 (de) * 1992-11-03 1996-10-02 Abb Patent Gmbh Elektrische Maschine
JP3414883B2 (ja) * 1995-04-26 2003-06-09 三菱電機株式会社 回転電機界磁コイルの極間接続装置
JP3651715B2 (ja) * 1996-06-12 2005-05-25 株式会社東芝 回転子巻線端部の支持装置
JP3284981B2 (ja) * 1998-11-02 2002-05-27 株式会社デンソー 車両用交流発電機およびそのステータの製造方法
BR0000189A (pt) * 2000-01-27 2001-10-02 Siemens Ltda Capa isoladora e máquina elétrica
WO2006056542A1 (fr) * 2004-11-24 2006-06-01 Alstom Technology Ltd Capot de protection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483310A (en) * 1968-04-23 1969-12-09 Ideal Ind Connector insulator
JPS6028733A (ja) * 1983-07-26 1985-02-13 Toshiba Corp 回転子巻線端部の絶縁方法
JPS61199145U (fr) * 1985-05-31 1986-12-12

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006056542A1 *

Also Published As

Publication number Publication date
JP4928462B2 (ja) 2012-05-09
CA2587599A1 (fr) 2006-06-01
JP2008521375A (ja) 2008-06-19
CA2587599C (fr) 2015-06-02
US7503801B2 (en) 2009-03-17
CN101065889B (zh) 2010-07-21
WO2006056542A1 (fr) 2006-06-01
CN101065889A (zh) 2007-10-31
US20070270023A1 (en) 2007-11-22

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