EP2044675A1 - Rotor avec gaine d'isolation sur l'arbre du rotor - Google Patents

Rotor avec gaine d'isolation sur l'arbre du rotor

Info

Publication number
EP2044675A1
EP2044675A1 EP07730269A EP07730269A EP2044675A1 EP 2044675 A1 EP2044675 A1 EP 2044675A1 EP 07730269 A EP07730269 A EP 07730269A EP 07730269 A EP07730269 A EP 07730269A EP 2044675 A1 EP2044675 A1 EP 2044675A1
Authority
EP
European Patent Office
Prior art keywords
rotor
rotor core
insulating sleeve
collar
sleeve
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Withdrawn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
EP07730269A
Other languages
German (de)
English (en)
Inventor
Walter Reisenweber
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2044675A1 publication Critical patent/EP2044675A1/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Withdrawn legal-status Critical Current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
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H02K3/51—Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • 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

Definitions

  • the present invention relates to a rotor for an electric motor or generator according to the preamble of claim 1. It also relates to a method for isolating the rotor shaft of an electric motor or generator according to the preamble of claim 9. Finally, the invention relates to a use of a formation of a Collar compressible insulation sleeve according to the preamble of claim 16.
  • German patent application DE 3631943 A1 discloses a commutator motor with a rotor shaft and a rotor core arranged on the rotor shaft with rotor core and
  • Winding forms two winding heads, one of which faces a likewise arranged on the rotor shaft commutator and the other facing away from this.
  • Rotor shaft is electrically insulated from the winding heads of the rotor package by a sleeve-shaped insulating cover enclosing the rotor shaft on both sides of the rotor core.
  • the sleeve-shaped insulating cover disclosed in DE 3631943 A1 on the side of the rotor core facing the commutator can be compressed in the longitudinal direction of the rotor shaft in order to be able to adapt to the distance between rotor core and commutator that varies in the individual case due to manufacturing tolerances.
  • the overall length is essentially determined by the total length of the components arranged on the rotor shaft.
  • the invention is therefore an object of the invention to reduce the total length of the rotor arranged on the components.
  • the present invention teaches a runner with the features of claim 1 and a runner with the features of claim 3. It also teaches a method for insulating a rotor shaft having the features of claim 9. Finally, it teaches a use of a compressible insulation sleeve with the features of claim 16.
  • the collar formed by the upsetting of the insulation sleeve creates in the radial direction - that is perpendicular to the rotor shaft - a creeping distance, which can replace the usual, extending in the longitudinal direction of the rotor shaft creepage path in whole or in part. Therefore, while maintaining the prescribed creepage distance, the length of the projection of the insulation sleeve at the end of the rotor shaft can be reduced, thereby reducing the overall length of the rotor shaft arranged components.
  • the present invention advantageously enables more compact design of electric motors and generators. This can save material and costs.
  • household appliances with electric motors of smaller overall length can be made more compact and / or reduced in weight.
  • the compressed insulation sleeve is preferably located at the end of the rotor shaft adjacent to a bearing in which the rotor shaft is rotatably mounted. Due to the shorter compared to the prior art design of the insulating sleeve, the bearing can be arranged closer to the rotor core, whereby the length of the motor or generator can be shortened.
  • the part of the insulating sleeve is preferably compressed, which protrudes beyond the winding head.
  • the non-compressed insulation sleeve for this purpose has a compressible portion which is located on the side facing away from the rotor core side of the insulating sleeve. This section is preferably chosen so that it is not covered by a winding head after a winding of the rotor core.
  • the preferred compressible portion has a smaller radial wall thickness than the remaining part of the insulating sleeve.
  • an unambiguous separation of functions between the portion which can be compressed with little pressure in the longitudinal direction and the rest of the insulation sleeve that is substantially rigid in the longitudinal direction can be achieved so that when the insulation sleeve is compressed, only the portion is compressed and forms the desired collar.
  • the reduced wall thickness is achieved, for example, by a larger inner diameter of the compressible section.
  • the insulating sleeve is preferably attached axially to the rotor shaft. After attaching the ungestauchten insulation sleeve on an end face of the rotor core of the rotor core is preferably first wound with the rotor winding and only then compressed the insulating sleeve to form the collar. In this way, it can be prevented that the collar obstructs the winding of the rotor core.
  • the winding head formed by the rotor winding in the region of the insulating sleeve is pressed in the longitudinal direction of the rotor shaft before the insulating sleeve is compressed.
  • the longitudinal extent of the winding head can be reduced and the insulating sleeve can be selected shorter, which is the - A -
  • the windings are preferably coated with a resin to solidify them.
  • resins are polyester resin and epoxy resin. This step can in particular prevent the winding head from expanding again after pressing.
  • the coil may be soaked in resin for coating, for example, in a resin bath. Most preferably, it is drizzled with resin.
  • the winding can be coated with resin before or after swaging the insulation sleeve.
  • the winding is coated after the upsetting of the insulating sleeve.
  • at least part of the collar, particularly preferably the entire collar, of the insulating sleeve is also coated with the resin so as to also solidify it and thereby prevent it from dissolving again.
  • the collar is formed by crimping the sleeve end facing away from the rotor core.
  • the collar is formed by rolling up the sleeve material.
  • the sleeve material starting from the end of the insulating sleeve, which is remote from the rotor core, rolled over the outside of the insulating sleeve, similar to a turtleneck garment.
  • the collar is formed in this embodiment of the invention by the rolled-up sleeve material.
  • the formation of the collar is facilitated by the fact that before or in the step of upsetting the sleeve material is temporarily softened by supplying heat at least in sections.
  • the preferred rotor comprises a preferably star-shaped insulating end disc, which covers the end face of the rotor core in order to isolate there the rotor core from the winding head.
  • the insulating sleeve is designed in one piece with the insulating end disc. This makes it possible to reduce the number of components and the steps in the manufacture of the rotor according to the invention, because insulating end disk and sleeve can be mounted in one operation on the rotor.
  • the insulating end disk preferably has an inner region and an outer cut-out edge region, wherein the inner region has a depression on the side of the insulating disk facing away from the rotor core.
  • the recess may at least partially accommodate the winding head and thereby further reduce the length of the rotor core. Through the depression can also be achieved that there the winding is not applied to the insulating end. This can counteract accumulation of resin in this area and, consequently, imbalance caused thereby.
  • the engine or generator can be quieter and less prone to wear. In addition, casting resin can be saved.
  • Preferred materials for the insulating sleeve or the combined insulating end / insulating sleeve are plastics, particularly preferably phenolic resins or other heat-resistant plastics.
  • the preferred material is a thermoplastic.
  • the insulating sleeve or the combined insulating end disk / insulating sleeve is preferably produced by injection molding or - if two material components should be used - in a 2-component injection molding process.
  • the present invention is preferably used in an electric motor, more preferably in a commutator motor, more preferably in household appliances.
  • the engine may power a blower in a vacuum cleaner or in a hair dryer or in a hand blender or work shaft in a food processor.
  • 1 shows a longitudinal section of the rotor according to the invention with the insulating sleeve connected and compressed integrally with the insulating end disk; 2 shows a longitudinal section of the uncompressed insulation sleeve connected in one piece with the insulating end disk; and
  • Fig. 3 a view of the integrally connected to the insulating disc uncompressed
  • Insulation sleeve along its axis of rotational symmetry from above.
  • FIG. 1 Shown in FIG. 1 is a rotor 1 for a commutator motor with a rotor shaft 2 which carries a rotor core and a commutator 3.
  • the rotor package comprises a rotor core 4, which is wound with a rotor winding, which runs in a known manner through winding tunnel 5 of the rotor core 4 and at the end faces of the rotor core 4 each a winding head 6, 7 forms.
  • the winding heads 6, 7 are electrically insulated from the rotor core 4 by star-shaped insulating end disks 8, 9.
  • the rotor core 4 is electrically insulated from the rotor winding by a high-voltage resistant film, not shown, which extends over the entire length of the rotor core 4 and the insulating end disks 8, 9.
  • the insulating end disks 8 and 9 have a thickness of, for example, 2.5 millimeters in order to provide a correspondingly long creepage distance in the gap formed between the insulating end disk 8, 9 and the film.
  • the winding heads 6, 7 are electrically insulated from the rotor shaft 2 by insulation sleeves 8 and 9 integrally connected to the insulating sleeves 10 and 11, respectively.
  • the winding head 7 on the side facing away from the commutator 3 side of the rotor core is compressed axially.
  • the projecting beyond this winding head 7 portion of the insulating sleeve 1 1 is compressed, in such a way that the sleeve material, starting from the end of the insulating sleeve 1 1, which faces away from the rotor core 4, is rolled over the outside of the insulating sleeve 1 1 and thereby a collar 13 forms.
  • the collar 13 has a radial thickness of, for example, 2 millimeters and thus forms a corresponding creepage distance in the radial direction.
  • the insulating sleeve 10 which isolates the commutator-side end winding 6 of the rotor shaft 2, protrudes to depict the necessary creepage distance 3 millimeters beyond the end of the winding head 6 addition. It is not compressed and has no section intended for upsetting.
  • a compressible insulation sleeve 1 1 is also used on the side of the commutator 3, for example the compressible insulation sleeve disclosed in the published patent application DE 3631943 A1.
  • the rotor core with the rotor winding and the collar 13, the insulating sleeve 1 1 facing away from the commutator 3 are coated with polyester resin for fixing, for example.
  • the insulating disc 9 integrally connected to the insulating sleeve 1 1 is seen on the side facing away from the commutator 3 side of the rotor core 4 in the unpressed state. It has a stiff portion 14 and a compressible portion 15, which has a lower mechanical strength than the rigid portion 14 for better mechanical compressibility.
  • the transition from the stiff 14 to the compressible portion 15 is preferably approximately where, after the winding of the rotor core 4 with the rotor winding of the winding head 7 ends.
  • Fig. 3 shows the star-shaped insulating end 9 with integrally molded unpressed insulation sleeve 1 1 from above. Placed on the rotor core 4, the teeth 16 cover the end faces of the rotor core 4, while the ends 17 of the winding tunnel 5 remain uncovered by the grooves 17.
  • the commutator 3, the commutator-side Isolierendfusionn 8 with the integrally molded insulating sleeve 10 are first placed on the rotor axis 2. Subsequently, the rotor core 4 is wound with the rotor winding. The winding head 7 on the side remote from the commutator 3 of the rotor core 4 is pressed in the direction of the rotor core 4.
  • the present invention advantageously enables a shortening of the rotor 1. It is preferably suitable for use in an electric motor, particularly preferably in a commutator motor, particularly preferably in household appliances.
  • the engine may power a blower in a vacuum cleaner or in a hair dryer or in a hand blender or work shaft in a food processor.

Landscapes

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

Abstract

L'invention concerne un rotor (1) pour un moteur ou générateur électrique avec un arbre de rotor (2), un moyeu de rotor (4) et une gaine d'isolation (11) entourant l'arbre de rotor (2), laquelle gaine est disposée sur une face frontale du moyeu de rotor (4) non tournée vers un commutateur (3) sur l'arbre de rotor (2). Selon l'invention, la gaine d'isolation (11) présente, à l'extrémité opposée au moyeu de rotor (4), un col (13) avec un diamètre extérieur supérieur au diamètre extérieur de la partie contiguë au col (13) de la gaine d'isolation (11). Le col (13) est constitué par écrasement de la gaine d'isolation (11). De manière avantageuse, l'invention permet de raccourcir le rotor (1). Elle est appropriée, de préférence, à l'utilisation dans un moteur électrique, mieux encore dans un moteur de commutateur, mieux encore dans des appareils ménagers. Le moteur peut par exemple entraîner un ventilateur dans un aspirateur, un sèche-cheveux ou un mixeur, ou encore un arbre de travail dans un robot de cuisine.
EP07730269A 2006-07-14 2007-06-20 Rotor avec gaine d'isolation sur l'arbre du rotor Withdrawn EP2044675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610032714 DE102006032714A1 (de) 2006-07-14 2006-07-14 Läufer mit Isolationshülse an der Läuferwelle
PCT/EP2007/056139 WO2008006678A1 (fr) 2006-07-14 2007-06-20 Rotor avec gaine d'isolation sur l'arbre du rotor

Publications (1)

Publication Number Publication Date
EP2044675A1 true EP2044675A1 (fr) 2009-04-08

Family

ID=38543839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07730269A Withdrawn EP2044675A1 (fr) 2006-07-14 2007-06-20 Rotor avec gaine d'isolation sur l'arbre du rotor

Country Status (4)

Country Link
EP (1) EP2044675A1 (fr)
CN (1) CN101507086A (fr)
DE (1) DE102006032714A1 (fr)
WO (1) WO2008006678A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079332A1 (de) * 2011-07-18 2013-01-24 Robert Bosch Gmbh Ringelement für einen Läufer eines Elektromotors
JP2015116063A (ja) * 2013-12-12 2015-06-22 アイシン精機株式会社 ブラシ付直流モータ
WO2017163333A1 (fr) * 2016-03-23 2017-09-28 三菱電機株式会社 Moteur à courant continu et actionneur
KR20170118989A (ko) * 2016-04-15 2017-10-26 효성전기주식회사 인슐레이터 타입 로터코어 절연수단을 구비한 eps모터
DE102020117995A1 (de) * 2020-07-08 2022-01-13 Bayerische Motoren Werke Aktiengesellschaft Elektrische Maschine für ein Kraftfahrzeug, Verwendung einer solchen elektrischen Maschine sowie Kraftfahrzeug
FR3123770A1 (fr) * 2021-06-08 2022-12-09 Renault S.A.S Guide de têtes de bobines, rotor bobiné et procédé de bobinage associés

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0175798B1 (fr) * 1984-09-24 1988-12-14 Siemens Aktiengesellschaft Dispositif et méthode pour régler le jeu axial entre rotor et paliers fixés au stator d'un moteur électrique
DE3631943A1 (de) * 1986-09-19 1988-04-07 Siemens Ag Kommutatormotor mit isolierabdeckung der rotorwelle
DE4009134A1 (de) * 1990-03-21 1991-09-26 Siemens Ag Verfahren zur einstellung des axialspiels
DE4117193C2 (de) * 1991-05-25 1994-01-27 Licentia Gmbh Anordnung zur Fixierung von Ankerwickelköpfen
DE4328041C2 (de) * 1993-08-20 1995-06-14 Licentia Gmbh Kommutatormotor für ein Antriebsaggregat
FR2778283A1 (fr) * 1998-04-30 1999-11-05 Valeo Systemes Dessuyage Joue d'extremite isolante de paquet de toles de ventilateur de vehicule
EP1187300A1 (fr) * 2000-08-31 2002-03-13 Siemens Aktiengesellschaft Moteur électrique a collecteur et procédé de production correspondant
JP2006054993A (ja) * 2004-07-13 2006-02-23 Aisan Ind Co Ltd 燃料ポンプ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008006678A1 *

Also Published As

Publication number Publication date
WO2008006678A1 (fr) 2008-01-17
DE102006032714A1 (de) 2008-01-24
CN101507086A (zh) 2009-08-12

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