WO2007110265A1 - Machine électrique - Google Patents

Machine électrique Download PDF

Info

Publication number
WO2007110265A1
WO2007110265A1 PCT/EP2007/051126 EP2007051126W WO2007110265A1 WO 2007110265 A1 WO2007110265 A1 WO 2007110265A1 EP 2007051126 W EP2007051126 W EP 2007051126W WO 2007110265 A1 WO2007110265 A1 WO 2007110265A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnets
armature
electrical machine
yoke
stator
Prior art date
Application number
PCT/EP2007/051126
Other languages
German (de)
English (en)
Inventor
Ulrich Luedtke
Gerald Roos
Harold Bitzer
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2007110265A1 publication Critical patent/WO2007110265A1/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
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
    • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation

Definitions

  • the invention relates to an electrical machine, in particular a DC motor, according to the preamble of claim 1.
  • Permanent magnet are energized. For reasons of cost, ferrite magnets are widely used as permanent magnets.
  • DC motors are designed for many applications two-pole or four-pole. For example, DC motors for the anti-lock braking system (ABS) are currently predominantly four-pole motors. Such DC motors usually have a motor housing with a substantially round
  • the permanent magnets are in the form of cup-shaped segments on the inner wall of the motor housing, e.g. by gluing or clamping, attached.
  • the electrical machine according to the invention has the advantage that is saved by the cuboid shape of the permanent magnets for a material for the permanent magnets and on the other hand, the production of the permanent magnets is easier.
  • the electric machine according to the invention comprises a housing (also referred to as pole pot), which accommodates at least one stator and one armature.
  • the armature is rotatably mounted on an armature shaft and has armature teeth with intervening Ankernuten on.
  • the anchor carries an armature winding.
  • the anchor consists for example of a layered laminated core, are punched into the Ankernuten.
  • the stator comprises a yoke yoke, which is, for example, annular and on the inner surface of which permanent magnets are attached.
  • the yoke can be a separate component. However, the yoke can also be formed by the housing itself, so that the permanent magnets are fixed to the inner wall of the housing.
  • the electric machine according to the invention is brushed, wherein at least two brushes slidably rest on a commutator.
  • the commutator is also rotatably mounted on the armature shaft.
  • the armature winding is electrically connected to the commutator.
  • the permanent magnets are cuboid.
  • Cuboid permanent magnets are basically known. However, they are used in electronically commutated DC motors. Thus, e.g. arranged in a permanent magnet synchronous machine in internal rotor design cuboid permanent magnets inside the rotor. Such permanent magnets are also referred to as buried permanent magnets.
  • the stator of the electric machine according to the invention has at least four poles.
  • the stator has at least six poles.
  • the electric machine can also be used e.g. be eight-pole. By increasing the number of poles, a higher power density is achieved.
  • a further increase in the power density can be achieved by the permanent magnets made of a rare earth material, preferably NdFeB, are made. Since permanent magnets made of rare earth material are relatively expensive, it is particularly important in this material to use as little material as possible and to manufacture the permanent magnets as inexpensively as possible. In addition, unwanted cogging torques are minimized due to the pole lift associated with cuboid permanent magnets. Therefore, it is of particular advantage to form the permanent magnets made of rare earth material cuboid.
  • the yoke yoke is flattened in the region of the permanent magnets.
  • the attachment of the permanent magnets can be done in a conventional manner, for example by gluing, clamping.
  • the yoke yoke of the stator is formed by the housing of the electrical machine.
  • the housing is e.g. made of sheet steel.
  • the armature winding is a single tooth winding.
  • an anchor is used, which has a comparatively small number of slots in the range of 5 to 11.
  • the single-tooth winding makes it possible to further increase the power density of the electrical machine.
  • a single tooth winding uses less copper for the armature winding.
  • more iron is available for flux guidance, so that the armature is not saturated despite higher remanent induction of the permanent magnets.
  • the diameter of the electric machine according to the invention can be, for example, 10% smaller than the diameter of an electrical machine according to the prior art.
  • the axial length in the case of the electric machine according to the invention can be compared with the prior art, e.g. be smaller by 20 to 30%.
  • the electric machine according to the invention is a DC motor, e.g. can be used for the ABS.
  • Figure 1 a a direct current motor according to the prior art in longitudinal section
  • Figure Ib the stator of the DC motor of Figure Ia in cross section
  • Figure 2a shows an embodiment of the inventive electric machine in longitudinal section
  • FIG. 2b shows the electric machine of Figure 2b in cross section.
  • FIG. 1 shows a conventional four-pole DC motor 100 according to the prior art.
  • the conventional DC motor 100 has a cup-shaped housing 10.
  • permanent magnets 12 made of ferrite are fixed, so that the housing 10 serves as a yoke 14 of the stator 15.
  • FIG. 1b shows that these are four shell-shaped permanent magnets 12.
  • the housing 10 has a substantially round cross-section.
  • an armature 20 and a commutator 30 are also rotatably mounted on an armature shaft 22.
  • the armature 20 has an armature winding 24 in the form of a single tooth winding.
  • carbon brushes 32 slidably abut the commutator 30.
  • FIG 2 shows a DC motor 200 according to the invention.
  • the housing 10 is cup-shaped.
  • permanent magnets 12 made of a rare earth material, such as NdFeB arranged.
  • the housing 10 forms the yoke 14 of the stator 15.
  • the permanent magnets 12 are cuboid, wherein in the region 13 of the permanent magnets 12, the housing 10 is flattened. In the flattened regions 13, the cuboid permanent magnets 12 lie essentially over the entire surface on the inner wall 11 of the housing 10. The flattening 13 of the housing 10 saves construction space.
  • an armature 20 and a commutator 30 are also rotatably mounted on an armature shaft 22.
  • the armature 20 has armature teeth 25 with armature slots 23 located therebetween and an armature winding 24 in the form of a single-tooth winding, as shown in FIG. 2b.
  • the anchor teeth 25 are wrapped with single tooth coils.
  • carbon brushes 32 slidably abut the commutator 30.
  • the DC motor shown in Fig. 2 is a six-pole motor. The illustration of the motors according to FIGS. 1 and 2 is chosen so that the installation space ratios can be compared with one another, wherein the two motors have the same power.
  • the diameter D of the motor according to the invention by 10 °% smaller than the diameter D of the conventional motor of Figure 1.
  • the length L of the motor of Figure 2 is 20 to 30 °% less than the length L. of the motor of Figure 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc Machiner (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne une machine électrique, notamment une machine à courant continu, comprenant un induit (20) muni de rainures (23) d'induit qui se trouvent entre des dents (25) d'induit voisines pour recevoir un enroulement (24) d'induit et un stator (15) qui comprend une culasse (14) de reflux magnétique munie d'aimants permanents (12), le stator (15) présentant au moins quatre pôles. La machine électrique conforme à l'invention est caractérisée par des aimants (12) permanents en forme de rectangles.
PCT/EP2007/051126 2006-03-27 2007-02-06 Machine électrique WO2007110265A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006013963.1 2006-03-27
DE200610013963 DE102006013963A1 (de) 2006-03-27 2006-03-27 Elektrische Maschine

Publications (1)

Publication Number Publication Date
WO2007110265A1 true WO2007110265A1 (fr) 2007-10-04

Family

ID=37909733

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/051126 WO2007110265A1 (fr) 2006-03-27 2007-02-06 Machine électrique

Country Status (3)

Country Link
DE (1) DE102006013963A1 (fr)
TW (1) TW200742228A (fr)
WO (1) WO2007110265A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019216273A1 (de) * 2019-10-23 2021-04-29 Robert Bosch Gmbh Elektrische Maschine
DE102022210487A1 (de) * 2022-10-04 2024-04-04 Continental Automotive Technologies GmbH Vorrichtung und Verfahren zur Erkennung der Orientierung eines Rotors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2265202A2 (en) * 1973-05-18 1975-10-17 Saccuto Aldo Electric traction motor - has a three-pole rotor with flat windings in eight-sided stator
DE2950720A1 (de) * 1979-12-17 1981-06-25 Siemens AG, 1000 Berlin und 8000 München Dauermagneterregte elektrische maschine
FR2695267A1 (fr) * 1992-09-02 1994-03-04 Valeo Equip Electr Moteur Stator de machine tournante électrique à aimants permanents, notamment pour démarreur.
EP0798842A1 (fr) * 1996-03-31 1997-10-01 Sanyo Electric Co. Ltd Moteur à aimants

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2265202A2 (en) * 1973-05-18 1975-10-17 Saccuto Aldo Electric traction motor - has a three-pole rotor with flat windings in eight-sided stator
DE2950720A1 (de) * 1979-12-17 1981-06-25 Siemens AG, 1000 Berlin und 8000 München Dauermagneterregte elektrische maschine
FR2695267A1 (fr) * 1992-09-02 1994-03-04 Valeo Equip Electr Moteur Stator de machine tournante électrique à aimants permanents, notamment pour démarreur.
EP0798842A1 (fr) * 1996-03-31 1997-10-01 Sanyo Electric Co. Ltd Moteur à aimants

Also Published As

Publication number Publication date
DE102006013963A1 (de) 2007-10-04
TW200742228A (en) 2007-11-01

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