EP2095490A1 - Stator pour machine électrique - Google Patents

Stator pour machine électrique

Info

Publication number
EP2095490A1
EP2095490A1 EP07821872A EP07821872A EP2095490A1 EP 2095490 A1 EP2095490 A1 EP 2095490A1 EP 07821872 A EP07821872 A EP 07821872A EP 07821872 A EP07821872 A EP 07821872A EP 2095490 A1 EP2095490 A1 EP 2095490A1
Authority
EP
European Patent Office
Prior art keywords
stator
coil
winding
coil windings
stator core
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Withdrawn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
EP07821872A
Other languages
German (de)
English (en)
Inventor
Werner Rieker
Michael Rader
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.)
Robert Bosch GmbH
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 EP2095490A1 publication Critical patent/EP2095490A1/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Withdrawn legal-status Critical Current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
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • 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

  • the invention relates to a stator for an electric machine, in particular for a universal motor, according to the preamble of claim 1.
  • Coil windings in the grooves is not sufficiently strong. This is particularly observed in electric motors in power tools, such as angle grinders, rotary hammers, which are equipped with means for reducing vibrations, such as vibration-damped housing or vibration-damped auxiliary handle. These means increase the user-friendliness of the power tool, because less vibrations are transmitted to the operator via the housing and the handle. At the same time, however, the components, in particular the high-mass components, in the housing of the power tool, such as the electric motor, suffer to an increased degree Vibrations. Due to strong vibrations, the coil windings can loosen in the grooves and cause a failure of the electric motor.
  • the stator according to the invention allows a stronger mechanical hold of the coil windings in the grooves. Increased vibrations, even over a long period of time, do not cause the coil windings in the slots to loosen and the electric motor to fail. This is achieved by the fact that the
  • Coil windings are not only inserted into the slots of the stator, but are materially connected to the stator core.
  • the stator according to the invention for an electric machine in particular for a universal motor, comprises a stator core with a stator yoke, which forms the magnetic yoke, and at least two pole shoes arranged radially on the stator yoke.
  • a stator core with a stator yoke, which forms the magnetic yoke, and at least two pole shoes arranged radially on the stator yoke.
  • two pole shoes are diametrically opposed.
  • the pole shoes are arranged radially inwardly on the stator yoke.
  • higher pole pairs are possible, in which alternate several north and south poles on the circumference of the stator yoke.
  • the stator core usually consists of a package of axially stacked laminations of the same blank.
  • the stator further includes a stator winding having at least two coil windings, each pole piece receiving at least one coil winding.
  • a coil winding consists of a coil wire with a plurality of turns. The coil wire is in a corresponding form to a Coil winding wound up. The finished wound coil winding is placed around the pole pieces in the slots of the stator.
  • stator In order to produce the stator according to the invention with a cohesive connection between the stator winding and stator core, before inserting the stator according to the invention
  • Stator winding in the groove of the stator core preferably applied an adhesive.
  • the stator winding may also be provided with an adhesive.
  • an adhesive applied on both surfaces to be joined, i. Groove and coil winding, an adhesive applied. The adhesive can be applied over the entire surface or at points.
  • Coil winding in the slots of the stator core so connects the coil winding with the stator core in addition by means of adhesive.
  • the adhesive also causes additional electrical insulation of the stator winding relative to the stator core.
  • the adhesive offers the advantage that it can be easily and inexpensively introduced into the grooves.
  • the additional cost of materials is low and relatively inexpensive.
  • the adhesive In order to effect an additional mechanical hold of the coil winding in the slots of the stator, the adhesive must meet special requirements. For example, the adhesive must be able to ensure sufficient mechanical strength of the coil windings in the grooves even at elevated temperatures with peak values of up to 180-200 0 C, as they may occur during operation of an electric motor of a power tool.
  • the existing of a lamination stack stator core after its production by punching packages usually with grease, lubricating oil or the like. so that the adhesive should allow sufficient support even under these conditions.
  • An example of a suitable adhesive is a solvent-free, oxide-filled, thermosetting one-component adhesive based on epoxy resin. - A -
  • the coil windings are preferably provided with an insulating element for electrical insulation with respect to the stator core.
  • the insulating element is preferably made of paper or pressboard.
  • the coil winding is wrapped in the groove with an insulating paper.
  • the insulation paper may be uncoated or e.g. be coated with a plastic film.
  • the coil wire of the coil windings may also be e.g. be coated with a known enamel. After introducing the coil windings with the insulating paper into the slots of the stator, the coil wire is heated, for example, by passing current through the coil wire.
  • the coil windings may be provided with a powder coating for electrical insulation.
  • powder coatings are well known in the art.
  • the powder coating is applied by spraying on the coil winding and then melted by heating to the coil winding.
  • the powder coating can also be applied by dipping.
  • the heated coil winding is lowered into an immersion bath of the powder coating, whereby the powder is heated to the
  • an impregnating resin may be applied to the stator winding.
  • the impregnating resin serves primarily to protect the stator winding against dust and abrasive particles, such as are present in the operation of a hand-held power tool, e.g. with the cooling air, enter the housing.
  • Another object of the invention is an electrical machine containing a stator according to the invention.
  • the electric machine is in particular a universal motor.
  • FIG. 1 shows an embodiment of a stator core of a stator according to the invention
  • Figure 2 is a coil winding
  • FIG. 3 shows an embodiment of a stator according to the invention.
  • stator core 20 of a stator 100 according to the invention of a two-pole motor, in particular a universal motor, shown in cross section.
  • the stator core 20 consists of a stator yoke 22, which is the magnetic
  • the stator core 20 is made up of a package of axially stacked laminations
  • the stator 100 further comprises a stator winding 30, which consists of at least two coil windings 31 for a two-pole motor. In each case at least one coil winding 31 is received by a pole piece 21.
  • Coil winding 31 consists of a coil wire having a plurality of turns.
  • the coil wire is wound into an approximately rectangular coil winding 31.
  • the coil winding 31 is provided with an insulating element 32, e.g. an insulating paper, wrapped.

Landscapes

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

Abstract

L'invention concerne un stator pour machine électrique, en particulier un moteur universel, qui comprend un noyau de stator (20) doté d'une culasse de stator (22) et d'au moins deux pièces polaires (21) disposées radialement sur la culasse de stator (22) ainsi qu'un enroulement de stator (30) doté d'au moins deux enroulements de bobine (31). Chaque pièce polaire (21) reçoit au moins un enroulement de bobine (31). Le stator est caractérisé en ce que les enroulements de bobine (31) sont reliés en correspondance de matière au noyau de stator (20) à l'aide d'un adhésif.
EP07821872A 2006-11-24 2007-10-26 Stator pour machine électrique Withdrawn EP2095490A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006055519A DE102006055519A1 (de) 2006-11-24 2006-11-24 Stator für eine elektrische Maschine
PCT/EP2007/061509 WO2008061857A1 (fr) 2006-11-24 2007-10-26 Stator pour machine électrique

Publications (1)

Publication Number Publication Date
EP2095490A1 true EP2095490A1 (fr) 2009-09-02

Family

ID=38938593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07821872A Withdrawn EP2095490A1 (fr) 2006-11-24 2007-10-26 Stator pour machine électrique

Country Status (5)

Country Link
US (1) US20090322179A1 (fr)
EP (1) EP2095490A1 (fr)
CN (1) CN101542871A (fr)
DE (1) DE102006055519A1 (fr)
WO (1) WO2008061857A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011088519A1 (de) * 2011-12-14 2013-06-20 Metabowerke Gmbh Stator für einen Elektromotor sowie Verfahren zur Herstellung eines Stators für einen Elektromotor
KR102002119B1 (ko) * 2013-02-28 2019-07-19 엘지전자 주식회사 압축기용 모터 및 이를 구비한 왕복동식 압축기
CN108808918A (zh) * 2018-06-11 2018-11-13 宝龙电子集团有限公司 一种驱动马达

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7078843B2 (en) * 2003-09-05 2006-07-18 Black & Decker Inc. Field assemblies and methods of making same
WO2005027306A2 (fr) * 2003-09-05 2005-03-24 Black & Decker Inc. Ensembles d'excitation et procede permettant de produire ceux-ci

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008061857A1 *

Also Published As

Publication number Publication date
WO2008061857A1 (fr) 2008-05-29
DE102006055519A1 (de) 2008-05-29
US20090322179A1 (en) 2009-12-31
CN101542871A (zh) 2009-09-23

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