EP1472775A1 - Stator pour machines electriques - Google Patents

Stator pour machines electriques

Info

Publication number
EP1472775A1
EP1472775A1 EP02774398A EP02774398A EP1472775A1 EP 1472775 A1 EP1472775 A1 EP 1472775A1 EP 02774398 A EP02774398 A EP 02774398A EP 02774398 A EP02774398 A EP 02774398A EP 1472775 A1 EP1472775 A1 EP 1472775A1
Authority
EP
European Patent Office
Prior art keywords
stator
slot
slots
connection
laminated 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Withdrawn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
EP02774398A
Other languages
German (de)
English (en)
Inventor
Juergen Herp
Heiko Sponar
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 EP1472775A1 publication Critical patent/EP1472775A1/fr
Withdrawn legal-status Critical Current

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
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles

Definitions

  • the present invention relates to a stator for an electrical machine, in particular an EC motor
  • stator (electronically commutated motor), the stator being formed from a plurality of sheets as a stack of sheets stacked one on top of the other.
  • electronically controlled electric motors are becoming increasingly important. These are electric motors in which the required periodic switching of coils is no longer carried out by a commutator, but rather by electronic switching devices.
  • the electronic switching devices also include a rotor position sensor in order to determine when the stator and the rotor for the coils to be switched are in a relative position that is favorable for switching or requires switching.
  • an electric motor which has a stator made from a laminated core.
  • the individual sheet metal lamellae have indentations in order to interlock with one another to enable adjacent metal fins.
  • the individual poles are connected to each other on their pole pieces by a large number of webs, resulting in a straight-line slot.
  • the slot is formed by a plurality of short recesses, which are each separated by the webs.
  • this known electric motor has a relatively high cogging torque and a relatively low output.
  • the stator according to the invention for an electrical machine is designed such that it has a very favorable cogging torque due to an advantageous embodiment of the slot.
  • an electrical machine with a stator according to the invention has a high output.
  • slot slots are formed between two poles of the stator in such a way that they run obliquely to a central axis of the stator at a predetermined angle.
  • the oblique slot slots can be formed continuously so that individual slot slots are not separated by webs or the like. This enables a very favorable cogging torque to be achieved with high performance.
  • the stator according to the invention can also be produced very inexpensively, since the stator can be formed from a large number of sheets stacked one above the other, which, for. B. can be produced by punching.
  • the individual sheet metal lamellae are punched in such a way that when they are placed one above the other, the slot is formed, which, viewed over the height of the sheet metal stack, extends at an angle to the central axis.
  • the stator package is from surrounded by a return ring over which the river flows.
  • the slot slots of the stator package are designed in a step-like manner.
  • the height of a step corresponds to the thickness of a sheet.
  • the respective slots (punched recess) of a sheet are offset from those of the adjacent sheet by a predetermined angle in the circumferential direction, so that when the sheet stack is assembled, an oblique, step-shaped slot slot is created, i.e. the two long sides of the usable slot are formed in a step-like manner.
  • the slot slots of the stator core are linear, i.e. formed with straight long sides and with a constant width.
  • the stator package and the yoke ring are preferably connected to one another by means of a positive connection. Furthermore, the positive connection ensures that the air gaps are as small as possible in order to keep the performance losses as small as possible.
  • the form-fitting connection is preferably formed on the end regions of the poles which protrude outward from the stator.
  • the positive connection can be designed, for example, as a dovetail connection or as a T-shaped connection or any other positive connection. Either the projecting area of the connection at the poles of the stator and the receiving area of the Connection to be formed on the return ring, or the projecting area of the connection is formed on the return ring and the receiving area of the connection on the poles.
  • the angle between the central axis of the stator and the inclined slot slot is preferably between 15 ° and 20 °, particularly preferably it is 18 °.
  • the poles are preferably connected in such a way that there are no slots in the top and bottom plates of the stator core. This further improves the stability of the laminated core.
  • a plurality of oblique slot slots are formed between two poles and are offset parallel to one another in the longitudinal direction of the stator. This ensures that the stator is mechanically more stable, but it loses power as the number of additional connecting webs formed thereby increases. It should be noted that in the case of a plurality of slot slots, the slot slots can be designed in such a way that they partially overlap in the direction of the height of the stator lamination stack, or that a sheet metal is provided between each slot slot without recesses in order to improve the stability of the lamination stack.
  • the oblique slot slot according to the invention consists of a multiplicity of shorter slot slots which are arranged in series.
  • the multitude of smaller ones Groove slots are thus arranged in a row one behind the other, where they are each separated by a sheet thickness, for example, when manufacturing from sheet metal. From a manufacturing point of view, such a slot can be produced, for example, simply by not providing individual sheets between the smaller slot with a cutout, so that the line-like arrangement results with several short oblique slots.
  • the laminated core for the stator according to the invention is preferably used in an EC motor in which windings are applied to the stator.
  • FIG. 1 shows a schematic perspective partial view of a stator laminated core according to a first exemplary embodiment of the present invention
  • Figure 2 is a schematic perspective view of a
  • FIG 3 is a partial perspective view of the stator core shown in Figure 2 from another
  • Angle, and Figure 4 is a plan view of a stator core with a yoke ring according to a third embodiment of the present invention.
  • a stator 1 according to a first exemplary embodiment of the present invention is described below with reference to FIG. 1.
  • the stator 1 comprises a plurality of tooth-shaped, outward-facing poles 2.
  • a connecting region 3 with a smaller thickness is provided between each two adjacent poles.
  • the stator laminated core is composed of a large number of individual laminations, which are stacked on top of one another. The sheets are preferably punched so that they are easy to manufacture in terms of production technology.
  • connection areas 3 each formed through slot slots 4.
  • the slot slots 4 have a step-like or step-like shape. This step-like shape is achieved in that the recesses in the individual sheets, which in the assembled state are the
  • Groove slot 4 result, each punched out offset by a certain angle in the circumferential direction.
  • the step height of the individual steps of the slot 4 corresponds to the sheet thickness. It should be noted that, of course, a plurality of sheets arranged one on top of the other can also be provided with the same recess, so that the step height of the slot slot is no longer the same Sheet thickness corresponds to, but the sum of the sheets arranged one above the other with the same recess.
  • This inclined position of the slot 4 in the stator 1 enables a significantly improved cogging torque to be achieved.
  • the top plate 5 of the plate stack and the bottom plate 6 of the plate stack are each formed without a recess. Since, according to the invention, the slot slots 4 are continuous, i.e. the slot slots 4 run continuously from the lower plate 6 to the upper plate 5, very high performance can still be achieved.
  • the slot slots 4 are arranged at an angle ⁇ of approximately 20 ° to a central axis X-X of the stator 1.
  • the slot 4 is designed such that it does not directly adjoin the teeth of the poles 2 at its two ends, but maintains a certain distance from the poles 2.
  • FIGS. 2 and 3 show a stator according to a second exemplary embodiment of the present invention.
  • the same or functionally the same parts are denoted by the same reference numerals as in the first embodiment.
  • stator 1 essentially corresponds to the stator of the first exemplary embodiment. In contrast to the first embodiment, however, there are 3 adjacent two connecting regions
  • Pole teeth 2 instead of a continuous slot 4, a plurality of continuous slots 4, namely exactly four, arranged.
  • the slot slots 4 of a connection area 3 are arranged such that they do not overlap in the direction of the height of the stator, ie in the direction of the central axis XX.
  • a sheet without a recess is arranged in the sheet stack between two adjacent slot slots 4. Because of the webs formed in this way between the individual slot slots 4, the stator loses some of its power as a percentage, but it is mechanically more stable.
  • the slot slots 4 have such a length that they run over a plurality of sheets.
  • the slot slots 4 have a height in the direction of the central axis X-X of the stator 1, which corresponds to approximately 1/5 in height of the entire stator package.
  • FIG. 4 due to the formation of several slot slots 4 in each connection area, it is possible for a toothed segment A to break out between the slot slots.
  • FIG. 4 a third exemplary embodiment according to the present invention is shown in FIG. 4, in which the same parts are again identified by the same reference numerals.
  • the toothed ring of the stator 1 is designed such that it has dovetail-like projections 9 at the ends of the poles 2. These dovetail-like projections 9 engage in correspondingly designed recesses 8, which are formed on an inner circumference of a yoke ring 7.
  • the stator 1 is thus firmly connected to the yoke ring 7 by means of a positive connection. This ensures that each stator tooth segment A is also connected to the yoke ring 7 by means of a positive fit and therefore cannot break out.
  • the present invention relates to one of a
  • a large number of laminations designed as a stacked laminated stack of stators for an electrical machine, in particular an EC motor.
  • a connection area 3 is arranged between two poles 2 of the stator 1, in which at least one recess 4 is provided.
  • the recess 4 is designed as a slot which extends at a predetermined angle ⁇ obliquely to a central axis X-X of the stator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

La présente invention concerne un stator pour une machine électrique, notamment pour un moteur à commutation électronique, qui est constitué d'une pluralité de tôles empilées les unes sur les autres de façon à former un paquet de tôles. Une zone de connexion (3) se trouve respectivement entre deux pôles (2) du stator (1) et présente au moins un évidement (4). Cet évidement est conçu sous forme de rainure qui est inclinée d'un angle prédéfini (α) par rapport à l'axe central (X-X) du stator.
EP02774398A 2002-01-31 2002-09-20 Stator pour machines electriques Withdrawn EP1472775A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10203796A DE10203796A1 (de) 2002-01-31 2002-01-31 Stator für eine elektrische Maschine
DE10203796 2002-01-31
PCT/DE2002/003546 WO2003065550A1 (fr) 2002-01-31 2002-09-20 Stator pour machines electriques

Publications (1)

Publication Number Publication Date
EP1472775A1 true EP1472775A1 (fr) 2004-11-03

Family

ID=27588171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02774398A Withdrawn EP1472775A1 (fr) 2002-01-31 2002-09-20 Stator pour machines electriques

Country Status (5)

Country Link
US (1) US20050017594A1 (fr)
EP (1) EP1472775A1 (fr)
JP (1) JP2005516574A (fr)
DE (1) DE10203796A1 (fr)
WO (1) WO2003065550A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031329A1 (de) * 2004-06-29 2006-01-19 Klinger, Friedrich, Prof. Dr. Ing. Außenläufer eines Generators, insbesondere eines Generators einer Windenergieanlage, und Verfahren zur Herstellung des Läufers
DE102004034176A1 (de) * 2004-07-15 2006-02-16 Minebea Co., Ltd. Rotoranordnung für eine elektrische Maschine
DE502004004596D1 (de) * 2004-11-12 2007-09-20 Grundfos As Permanentmagnet-Rotor
DE102005005953A1 (de) * 2005-02-10 2006-08-17 Robert Bosch Gmbh Bürstenlose Gleichstrommaschine sowie Rückschlussringpaket, Zahnkranzpaket und Kopfteil einer Gleichstrommaschine sowie Verfahren zur Herstellung einer bürstenlosen Gleichstrommaschine
JP2006333581A (ja) * 2005-05-24 2006-12-07 Toyota Industries Corp ステータ及びステータの製造方法
JP2014007948A (ja) * 2012-05-30 2014-01-16 Nsk Ltd モータコア、モータ、搬送装置及びモータコアの製造方法
CN103051079A (zh) * 2013-01-05 2013-04-17 广东威灵电机制造有限公司 一种定子
JP6280761B2 (ja) * 2014-02-10 2018-02-14 山洋電気株式会社 ステータコアおよび永久磁石型モータ
JP6218997B1 (ja) * 2016-03-24 2017-10-25 三菱電機株式会社 回転電機、電動パワーステアリング装置および回転電機の製造方法
DE202017006525U1 (de) * 2017-12-20 2018-02-15 PVS-Kunststofftechnik GmbH & Co. KG Stator-/Rotorvorrichtung für Elektromotoren
DE202017006523U1 (de) * 2017-12-20 2018-02-07 PVS-Kunststofftechnik GmbH & Co. KG Stator-/ Rotorvorrichtung für Elektromotoren

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE967387C (de) * 1955-01-19 1957-11-07 Siemens Ag Aus zwei konzentrischen Teilen bestehender Staendereisenkoerper fuer elektrische Maschinen
US2975312A (en) * 1958-03-07 1961-03-14 Globe Union Inc Laminated magneto components
JPH10271716A (ja) * 1997-03-21 1998-10-09 Matsushita Electric Ind Co Ltd 電動機の固定子鉄心及びその製造方法
US6140728A (en) * 1998-08-21 2000-10-31 Toyota Jidosha Kabushiki Kaisha Electric motor and electric power steering apparatus employing the electric motor
DE19842948A1 (de) * 1998-09-18 2000-03-30 Siemens Ag Elektromotor
JP2000341889A (ja) * 1999-05-25 2000-12-08 Hitachi Ltd 回転機用コア、その製造方法、コア用素片および回転機
JP3563650B2 (ja) * 1999-10-25 2004-09-08 株式会社日立産機システム 回転電機
JP3691345B2 (ja) * 2000-05-25 2005-09-07 三菱電機株式会社 永久磁石型電動機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03065550A1 *

Also Published As

Publication number Publication date
WO2003065550A1 (fr) 2003-08-07
DE10203796A1 (de) 2003-08-14
JP2005516574A (ja) 2005-06-02
US20050017594A1 (en) 2005-01-27

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