WO1995020258A1 - Cage servant a maintenir des aimants permanents dans le stator d'un moteur electrique - Google Patents

Cage servant a maintenir des aimants permanents dans le stator d'un moteur electrique Download PDF

Info

Publication number
WO1995020258A1
WO1995020258A1 PCT/EP1995/000138 EP9500138W WO9520258A1 WO 1995020258 A1 WO1995020258 A1 WO 1995020258A1 EP 9500138 W EP9500138 W EP 9500138W WO 9520258 A1 WO9520258 A1 WO 9520258A1
Authority
WO
WIPO (PCT)
Prior art keywords
cage
magnets
struts
permanent magnets
webs
Prior art date
Application number
PCT/EP1995/000138
Other languages
German (de)
English (en)
Inventor
Günther Kiehnle
Christof Heuberger
Bernd Walther
Original Assignee
Itt Automotive Europe 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 Itt Automotive Europe Gmbh filed Critical Itt Automotive Europe Gmbh
Publication of WO1995020258A1 publication Critical patent/WO1995020258A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders

Definitions

  • the invention relates to a cage for holding permanent magnets in a stator of an electrical machine with struts which extend lengthwise and which serve to space a corresponding number of permanent magnets in the circumferential direction, with at least one ring which supports the struts connects with each other and serves as an axial stop for the magnet and with a device for generating a preload on the permanent magnets in the circumferential direction.
  • the cage here consists of two parts which are mirror images of one another and which are plugged together to form an essentially cylindrical cage.
  • a cylindrical housing is pushed over the cage, which on the one hand holds the two cage parts together and on the other hand serves to close the circuit of the magnetic flux of the permanent magnets applied to it.
  • the cage After being plugged together, the cage consists of two opposite longitudinal struts which are connected to one another by means of two rings. In this way, two Lindring segment-shaped recesses in which the permanent magnets can be used.
  • the permanent magnets connect to the rings in the axial direction and to the longitudinal struts in the circumferential direction.
  • tabs are formed on the struts, which come into contact with the permanent magnets and fix them.
  • the cage is made of plastic. In the known processes for producing such shapes, it is difficult to form such tabs or to give them a corresponding permanent elasticity.
  • the invention is therefore based on the further object of developing a cage for holding permanent magnets which is simple to manufacture and nevertheless enables the permanent magnets to be fixed securely.
  • a cage according to the preamble of the main claim have the following features: at least one longitudinal strut should have a slot which opens towards one side surface of the strut and serves to accommodate a spring element.
  • the spring element can be a U-shaped bent elastic wire which is inserted into the slot, so that one leg protrudes from the slot and comes to rest against the permanent magnet.
  • the slot can also open towards the other side of the strut, so that the other leg of the wire spring also bears against a further permanent magnet and fixes it in the direction of the start.
  • tabs can be provided on the inside of the struts which extend circumferentially beyond the contour of the struts.
  • the invention is also intended to provide secure fastening for the housing of the electrical machine which comprises the cage.
  • a longitudinal bore is provided at least in one strut, through which a screw can be inserted, with the aid of which a bearing plate on the housing, or the housing on a further housing, for example on a housing for a pump, which the electromotor should drive, can be attached.
  • Another object of the invention is to align the carrier plate for a brush system in the correct position in the motor housing.
  • the struts extend beyond the axial length range of the permanent magnets and form a contact surface for a carrier plate which carries a brush system of the electrical machine. Furthermore, notches are provided which engage in corresponding recesses in the carrier plate.
  • Figure 1 shows a spatial perspective view of the cage.
  • Figure 2 shows a partially sectioned side view of the cage
  • Figure 3 shows a cage arranged in a housing with the associated spring.
  • the cage has four webs 1, which are aligned at constant distances from an imaginary axis.
  • the axis corresponds to the axis that the rotor takes after the electrical machine has been assembled.
  • the webs 1 are essentially elongated cuboids, with the outwardly and inwardly-facing surfaces being correspondingly curved in relation to the axis of the cylinder.
  • the side surfaces 4, 4 'of each web are essentially parallel to one another.
  • the end faces are aligned perpendicular to the side faces.
  • the webs 1 are connected to one another by two rings 5 and 6.
  • the lower ring 5 is located at the lower end of the webs 1, the lower surface of the ring being flush with the end faces of the webs 1.
  • the outer surface of the lower ring 5 is flush with the outer surfaces of the webs 1, the inner surface of the ring lies on a somewhat larger radius than the inner surfaces of the webs 1.
  • a middle ring 6 is provided, the pa - is aligned parallel to the lower ring 5, and its inner ring surface closes with the inner surface of the webs 1.
  • the outer ring surface lies on a somewhat smaller radius than the outer surfaces of the webs 1.
  • the magnets used are held inwards by the side surface of the webs 1 in the circumferential direction, by the ring surfaces of the rings 5, 6 in the axial direction and by the tabs 7 in the radial direction.
  • the housing consists of magnetically conductive material.
  • the webs 11 of the first type have the contour described above, as well as a longitudinal bore 22, which serves to receive a fastening screw.
  • the webs 12 of the second type have a slot 20. These slots 20 can either be formed during the injection molding of the cage or subsequently by a cutting process (sawing) in the cage.
  • the slots 20 extend substantially parallel to the inner or outer surface of the webs 12 and are open on three sides, namely to the two side surfaces 4, 4 'of the webs 12 and in the axial direction to the side on which the middle ring 6 is located.
  • the webs 12 of the second type have additional slots 21 on the outer edge. These serve to align the cage in the housing, which is provided with corresponding guide lugs.
  • Spacers 23 and 24 are located on the end faces of the webs 1. At the lower end of the webs 1, the spacers 23 serve to space the end face of the housing. The elevations 24 at the upper end of the webs serve to align a carrier plate for a brush system which has corresponding recesses. This ensures that the brush system is exactly aligned with the magnets.
  • FIG. 3 shows the arrangement of the cage in a motor housing 28.
  • the motor housing is essentially pot-shaped, the pot base 29 being bulged out to accommodate a bearing.
  • Bores are provided in the bottom of the pot, which are aligned with the longitudinal bores 22 in the webs 11 of the first type.
  • the area of a slot 21 is shown in FIG. 3 so that the spring 30 can be seen in the slot 21.
  • the spring 30 is bent in a U-shape, one leg 31 abutting a magnet 32 and one leg 33 abutting a magnet 34.
  • the leg 31 is essentially straight, so that it abuts the magnet 32 with a full edge.
  • the leg 33 is slightly curved so that it lies essentially point-like on the magnet 34.
  • the respective other sides of the magnets 32 and 33, which are not spring-loaded, lie flat against the side surface of the webs 11 of the first type. In this way, the magnets are securely fixed in the circumferential direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Dc Machiner (AREA)

Abstract

L'invention concerne une cage servant à maintenir des aimants permanents dans le stator d'un moteur électrique. Dans certains moteurs électriques, le stator est formé d'aimants permanents placés dans un boîtier à conduction magnétique. Ces aimants sont souvent collés dans le boîtier ou fixés autrement. Cependant, il a déjà été prévu d'utiliser des cages pour maintenir ces aimants. La fixation précise des aimants dans ce type de cage, notamment la fixation dans le sens périphérique, comporte cependant des difficultés. Il est prévu à cet effet de pratiquer des fentes (20) dans la cage, dans lesquelles on peut introduire des éléments faisant ressort (30) qui agissent sur les surfaces latérales des aimants (32, 34). Ces éléments qui font ressort peuvent être des câbles élastiques cintrés en U, introduits à plat dans les fentes, et leurs branches (31, 33) font saillie sur les deux côtés depuis les surfaces latérales (4, 4') des entretoises (12).
PCT/EP1995/000138 1994-01-22 1995-01-13 Cage servant a maintenir des aimants permanents dans le stator d'un moteur electrique WO1995020258A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4401847.9 1994-01-22
DE19944401847 DE4401847A1 (de) 1994-01-22 1994-01-22 Käfig zur Halterung von Dauermagneten in einem Stator einer elektrischen Maschine

Publications (1)

Publication Number Publication Date
WO1995020258A1 true WO1995020258A1 (fr) 1995-07-27

Family

ID=6508476

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/000138 WO1995020258A1 (fr) 1994-01-22 1995-01-13 Cage servant a maintenir des aimants permanents dans le stator d'un moteur electrique

Country Status (2)

Country Link
DE (1) DE4401847A1 (fr)
WO (1) WO1995020258A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109494944A (zh) * 2018-11-05 2019-03-19 湖南河豚机电设备有限公司 一种油泵定子自动组装限位模

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0956091A (ja) * 1995-08-18 1997-02-25 Mitsubishi Electric Corp 永久磁石式回転電機
DE19602173A1 (de) * 1996-01-23 1997-10-16 Teves Gmbh Alfred Elektromotorgehäuse
DE19705432A1 (de) * 1997-02-13 1998-08-27 Mannesmann Sachs Ag Trägerring zur Aufnahme von Permanentmagneten für eine elektrische Maschine
WO2000074204A2 (fr) * 1999-05-26 2000-12-07 Jancu Lungu Stator d'un moteur a reluctance biphase a commutation electronique
RO120022B1 (ro) 1999-05-26 2005-07-29 Iancu Lungu Inductor pentru maşini de reluctanţă comutabilă, cu două faze, cu comutaţie electronică
US6522042B1 (en) 2000-01-27 2003-02-18 Black & Decker Inc. Anchoring system for injection molded magnets on a flux ring or motor housing
US6522041B1 (en) 2000-03-08 2003-02-18 Black & Decker Inc. Permanent magnet motor flux rings
US6462448B1 (en) 2000-07-05 2002-10-08 Black & Decker Inc. Flux ring for an electric motor
DE10148652A1 (de) * 2001-10-02 2003-04-17 Bosch Gmbh Robert Gleichstrommaschine und Verfahren zum Befestigen von Magneten an einem Polgehäuse einer Gleichstrommaschine
US7768168B2 (en) 2003-02-26 2010-08-03 Robert Bosch Gmbh Electric machine comprising a permanent magnet
DE10348394A1 (de) 2003-10-17 2005-06-02 Robert Bosch Gmbh Rotor für eine elektrische Maschine mit verbesserter Temperaturbeständigkeit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2282182A1 (fr) * 1974-08-14 1976-03-12 Bosch Gmbh Robert Petite machine electrique, notamment petit moteur, avec bagues en fer de fermeture de circuit
DE3426996A1 (de) * 1984-07-21 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Elektromotor, insbesondere zum antreiben einer kraftstoffoerderpumpe
FR2573258A1 (fr) * 1984-11-09 1986-05-16 Ducellier & Cie Stator pour machines electriques et machines munies dudit stator
EP0238249A2 (fr) * 1986-03-17 1987-09-23 Johnson Electric Industrial Manufactory Limited Moteur électrique
US4795932A (en) * 1987-07-31 1989-01-03 United Technologies Electro Systems, Inc. Double insulated motor including a magnet retainer
US5105114A (en) * 1991-05-20 1992-04-14 General Motors Corporation Frame and magnet assembly for a dynamoelectric machine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521096A (en) * 1968-10-14 1970-07-21 Ford Motor Co Permanent magnet dynamoelectric machine structure
IT1123505B (it) * 1978-07-31 1986-04-30 Ferodo Sa Statore di macchina elettrica ruotante

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2282182A1 (fr) * 1974-08-14 1976-03-12 Bosch Gmbh Robert Petite machine electrique, notamment petit moteur, avec bagues en fer de fermeture de circuit
DE3426996A1 (de) * 1984-07-21 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Elektromotor, insbesondere zum antreiben einer kraftstoffoerderpumpe
FR2573258A1 (fr) * 1984-11-09 1986-05-16 Ducellier & Cie Stator pour machines electriques et machines munies dudit stator
EP0238249A2 (fr) * 1986-03-17 1987-09-23 Johnson Electric Industrial Manufactory Limited Moteur électrique
US4795932A (en) * 1987-07-31 1989-01-03 United Technologies Electro Systems, Inc. Double insulated motor including a magnet retainer
US5105114A (en) * 1991-05-20 1992-04-14 General Motors Corporation Frame and magnet assembly for a dynamoelectric machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109494944A (zh) * 2018-11-05 2019-03-19 湖南河豚机电设备有限公司 一种油泵定子自动组装限位模

Also Published As

Publication number Publication date
DE4401847A1 (de) 1995-07-27

Similar Documents

Publication Publication Date Title
EP1941597B1 (fr) Procédé de fabrication d'un rotor pour une machine electrique
EP0067164B1 (fr) Machine electrique notamment pour le demarrage de moteur a combustion
DE3300558C2 (fr)
DE1941169C2 (de) Stator eines elektrischen Generators
EP0559665A1 (fr) Stator pour une machine electrique.
WO1995020258A1 (fr) Cage servant a maintenir des aimants permanents dans le stator d'un moteur electrique
DE7906312U1 (de) Elektrische kleinmaschine, insbesondere kleinmotor
DE2438936A1 (de) Elektrische kleinmaschine, insbesondere kleinmotor, mit einem eisenrueckschlussring
DE4034277C2 (fr)
DE2342499A1 (de) Haltevorrichtung fuer feldmagnete im gehaeuse elektrischer maschinen
DE19622186A1 (de) Elektromotor
DE10225156A1 (de) Transversalflussmaschine, insbesondere Unipolar-Transversalflussmasschine
DE102020103868A1 (de) Rotor und Verfahren zur Herstellung eines Rotors
DE2718489A1 (de) Lineartransportmechanismus
DE2736932C3 (de) Halterung für Stator-Wickelköpfe elektrischer Maschinen
DE4114738A1 (de) Elektromotor sowie verfahren zur herstellung eines solchen
EP0279078A2 (fr) Dispositif de contact
DE2458991A1 (de) Buerstenanordnung fuer einen miniaturmotor
DE102012106224B4 (de) Endkappenanordnung für einen Elektromotor
DE3432856A1 (de) Elektrisches geraet mit einem gehaeuse und zumindest einem elektrischen versorgungskabel, das an einem, an dem gehaeuse angeordneten bauelement gehalten ist und verfahren zum montieren des bauelements an dem gehaeuse des geraets
DE102018118628A1 (de) Aktuator
EP0902524A1 (fr) Moteur à courant continu
DE3721758C2 (fr)
DD248682A1 (de) Anordnung zur herstellung von elektrischen verbindungen in einem elektromotor
DE2702747C3 (de) Selbstanlaufender Synchronmotor

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase