WO2010145841A2 - Stator pour moteur électrique - Google Patents

Stator pour moteur électrique Download PDF

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Publication number
WO2010145841A2
WO2010145841A2 PCT/EP2010/003721 EP2010003721W WO2010145841A2 WO 2010145841 A2 WO2010145841 A2 WO 2010145841A2 EP 2010003721 W EP2010003721 W EP 2010003721W WO 2010145841 A2 WO2010145841 A2 WO 2010145841A2
Authority
WO
WIPO (PCT)
Prior art keywords
stator
winding
tooth
electric motor
yoke
Prior art date
Application number
PCT/EP2010/003721
Other languages
German (de)
English (en)
Other versions
WO2010145841A3 (fr
Inventor
Jacek Junak
Grzegorz Ombach
Original Assignee
Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg
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 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg filed Critical Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg
Publication of WO2010145841A2 publication Critical patent/WO2010145841A2/fr
Publication of WO2010145841A3 publication Critical patent/WO2010145841A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for 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
    • H02K15/08—Forming windings by laying conductors into or around core parts
    • H02K15/095—Forming windings by laying conductors into or around core parts by laying conductors around salient poles
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

  • the invention relates to a stator for an electric motor, with a circumferential yoke and with an even number of stator teeth, which protrude radially from the yoke radially inwards, as well as with pole pockets which protrude at the inner tooth end of at least one stator tooth in the circumferential direction, and with arranged between the stator teeth Statornuten, are introduced into the stator windings in Nadelwickelclar.
  • An electric motor in particular an electronically commutated multi-pole three-phase motor, has a stator and a rotor, which is often referred to as an armature or rotor.
  • the stator typically includes a stator lamination stack composed of a plurality of individual laminations and having stator teeth with stator slots provided between these stator teeth. In the Statornuten the stator winding (wire turns of a winding wire) is introduced.
  • stator teeth are brought together in the circumferential yoke and have on Nuteinthtts districten tooth end (free end) on both sides in the circumferential direction facing tabs (pole pockets) on.
  • the stator teeth usually form very closely spaced circular segment-shaped pole shoes on the free ends opposite the yoke, which distribute the magnetic excitation field in a circle-segment-shaped manner onto the rotor (armature).
  • the stator winding is usually made of copper wires, which are guided around the stator teeth according to a predetermined winding scheme with a certain number of turns.
  • the winding or winding wire usually has a circular cross-section.
  • BESTATIGUNGSKOPIE The aim of every design of an electric motor is to keep losses occurring during engine operation - in particular electrical losses - as low as possible. For this purpose, it is desirable to make the proportion of copper formed by the winding wires of the stator winding in relation to the available groove area as large as possible.
  • the groove fill factor of the stator of an electric motor introduced for this purpose which is the ratio of the total winding cross-sectional area to the groove area, is always less than 100% in practice.
  • the stator teeth which are usually provided with insulation, are wound directly by means of the so-called needle winding technique.
  • a needle winding technique a needle having a nozzle disposed at right angles to the direction of movement moves in a reciprocating motion through the respective slot slot between adjacent stator teeth of the stator to place the wire in the desired position.
  • An advantage of the needle winding technique is that usually the needle carrier on which the wire guide nozzle is located is coupled to a CNC (computerized numerical control) coordinate system so that a spatial movement of the nozzle towards the stator is made possible.
  • a CNC computerized numerical control
  • the needle winding technology also makes it possible to produce a finished assembly, for example stator coils and their interconnection and contacting, on a single machine. It is also possible to wind on low Statorblechstapel Whyt (winding head heights) motor coils, which have a good fill factor.
  • a disadvantage of the needle winding technique is that between two adjacent stator teeth, a free space must remain, the size of which corresponds at least to the nozzle diameter of the needle. This nozzle diameter is about three times the diameter of the winding wire. The space between two adjacent stator teeth can thus not be completely filled.
  • the invention has for its object to provide a particularly wound by means of needle winding technology stator for an electric motor with high winding fill factor.
  • the stator according to the invention for an electric motor has a number of effective as a pole piece stator teeth, which protrude from a circumferential yoke radially inward.
  • Stator windings are introduced into stator slots formed between the stator teeth. While in the circumferential direction only every second stator tooth wound (single tooth winding) and nutein- on the (inner) tooth end is provided with both sides in the circumferential direction pointing (protruding) pole pieces, the remaining, so between the wound stator teeth arranged stator teeth are winding-free and free side latches.
  • the coil windings are preferably introduced into the stator slots after the needle winding process.
  • the beginning of the winding of the respective stator winding is expediently positioned within the respective stator slot on the groove base and there suitably in the gusset formed with the wound stator tooth.
  • the location or position of the winding end of the stator winding is on the groove entrance facing away from the yoke and there preferably provided the winding start diametrically opposite in the vicinity of the adjacent unwound stator tooth of the respective stator.
  • the stator is preferably twelve grooved and thus designed with twelve stator teeth. This twelve-slot stator is particularly suitable in a ten-pole, brushless electric motor (DC motor) used.
  • the advantages achieved by the invention are in particular that can be increased from previously about 30% to 60% by the elimination of some of the pole pockets on the stator of an electric motor with single tooth winding in the needle winding process, the fill factor.
  • the single winding technique which produces practically the same motor power compared to the double-tooth winding, also has a comparatively low failure probability as a result of short-circuit faults between the phases of a conventional three-phase electric motor.
  • the increase in the fill factor in turn leads to an increased copper content and a reduced resistance in the engine.
  • Fig. 1 shows an electric motor according to the invention with a rotor and with a stator
  • Fig. 2 shows a detail II of Fig. 1 on a larger scale with a single tooth winding according to the invention.
  • Fig. 1 shows schematically a brushless electric motor 1, in particular DC motor, as this is used in motor vehicles, for example, to support semi-automatic transmission or the like.
  • the electric motor 1 comprises a stator 2 which coaxially surrounds a rotor 4 seated on an axle or armature shaft 3.
  • the rotor 4 is constructed from a laminated core and has a number of permanent magnets 5 on the outer peripheral side on. Within the rotor 4 stacked individual sheets of the laminated core form a number of pockets 6 for receiving the permanent magnets 5.
  • the stator 2 which may also be made of a laminated core stacked with individual sheets, has a circumferential yoke 7 and an even number of stator teeth 8 with stator grooves 9 therebetween.
  • Each second stator tooth 8b carries a stator winding 10 while the intervening stator teeth 8a are unwound.
  • Fig. 1 The illustrated in Fig. 1 preferred electric motor 1 is occupied on the rotor side with ten permanent magnets 5 and thus represents a ten-pole electric motor 1 with twelve stator 9 and twelve stator teeth. Of these, six stator 8b are wound alternately and six stator teeth 8a unwound.
  • every second stator tooth 8b on the rotor 4 facing the inner tooth end 11 is provided with pole tabs 12. These stand in the circumferential direction 13 and point in the direction of each adjacent stator 9 only those stator teeth 8 b, which are provided with such pole pockets 12, carry the stator winding 10. The adjacent thereto stator teeth 8 a have no such pole tabs 12 on. Also, these stator teeth 8a are not wound. In other words, in the circumferential direction 13 of the stator 2, each second stator tooth 8a is both free of winding and pole-free.
  • the winding of the respective stator tooth 8b takes place with the so-called needle winding method.
  • a needle 14 is inserted into one of the two stator slot 9 adjacent to the wound stator tooth 8b, and the stator tooth 8b is wound by a correspondingly controlled movement of the needle 14.
  • the winding wire 15, which usually consists of copper emerges from a front nozzle 16 of the needle 14 and is wound around the respective stator tooth 8b in accordance with the illustrated winding diagram.
  • the winding or winding end indicated by the arrow 17b is located in the other stator slot 9 adjacent to the same stator tooth 8b and in this case practically diametrically opposite the beginning of the winding 17a.
  • the winding end 17b is thus located there, the corresponding Statornut 9 bounding, tab-free and unwound stator tooth 8a in the region of the groove inlet 20.
  • This winding end 17b can then in a manner not shown via grooves or slots in the region of the yoke 7 from the stator 2 led out and according to a particular interconnection, for example, in triangular or star connection, be connected to the other windings 10.
  • the access for the winding needle 14 to the respective stator groove 9 is sufficiently large to ensure that the needle 14 has the winding start 17a in the groove corner 18 between the wound stator tooth 8b and the one depositing adjacent stator 9, then perform the multi-layer winding and the coil end 17b in the region of the groove inlet 20 of the other adjacent stator 9 can lead out of this.
  • the fill factor in the stator 9 is increased compared to a conventional stator and can be greater than 50% in particular.

Abstract

L'invention concerne un stator (2) pour un moteur électrique (1) de préférence sans balai et à 10 pôles, lequel stator comporte pour des raisons pratiques douze encoches, un nombre pair de dents statoriques (8) faisant saillie d'une culasse (7) radialement vers l'intérieur, des languettes polaires (12) qui s'étendent dans le sens circonférentiel (13) à l'extrémité interne (11) d'au moins une dent statorique (8), ainsi que des encoches statoriques (9) situées entre les dents statoriques (8) et dans lesquelles sont insérés des enroulements statoriques (10) par le procédé de bobinage au moyen d'une aiguille. Dans le sens circonférentiel (13), une dent statorique (8a) sur deux ne comporte aucun enroulement ni aucune languette polaire à l'extrémité (11) de la dent côté entrée d'encoche.
PCT/EP2010/003721 2009-06-20 2010-06-21 Stator pour moteur électrique WO2010145841A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200920008515 DE202009008515U1 (de) 2009-06-20 2009-06-20 Stator für einen Elektromotor
DE202009008515.5 2009-06-20

Publications (2)

Publication Number Publication Date
WO2010145841A2 true WO2010145841A2 (fr) 2010-12-23
WO2010145841A3 WO2010145841A3 (fr) 2011-08-11

Family

ID=43028870

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/003721 WO2010145841A2 (fr) 2009-06-20 2010-06-21 Stator pour moteur électrique

Country Status (2)

Country Link
DE (1) DE202009008515U1 (fr)
WO (1) WO2010145841A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3512077A1 (fr) 2018-01-15 2019-07-17 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Moteur électrique et ventilateur de refroidissement
WO2020226859A1 (fr) * 2019-05-03 2020-11-12 Lin Engineering, Inc. Géométrie pour des stators enroulés en une seule couche avec une fabricabilité élevée
CN112202255A (zh) * 2019-07-08 2021-01-08 博泽沃尔兹堡汽车零部件欧洲两合公司 电动马达和散热器风扇

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016219051A1 (de) * 2016-09-30 2018-04-05 Robert Bosch Gmbh Elektromotor zum Antrieb eines ABS-Systems

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
CA788070A (en) * 1963-03-12 1968-06-18 H. Wessels Johannes Self starting brushless direct current motor
JPS5866568A (ja) * 1981-10-12 1983-04-20 Sankyo Seiki Mfg Co Ltd ブラシレスモ−タ
JPS5990279U (ja) * 1982-12-07 1984-06-19 山洋電気株式会社 永久磁石回転子形電動機
JPS60128848A (ja) * 1983-12-13 1985-07-09 Kamei Mach Project Kk ノズル斜式巻線方法
US4874975A (en) * 1984-11-13 1989-10-17 Digital Equipment Corporation Brushless DC motor
EP1235327A3 (fr) * 2001-02-21 2004-07-07 Kabushiki Kaisha Moric Bobine de stator pour une machine électrique tournante et son procédé de fabrication
ATE429062T1 (de) * 2003-02-13 2009-05-15 Atop Spa Vorrichtung und verfahren zum bewickeln eines kerns einer dynamoelektrischen maschine
TW200847584A (en) * 2007-05-25 2008-12-01 Azure Shine Int Inc Brushless permanent magnet motor with unequal width tooth slots and its manufacturing method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3512077A1 (fr) 2018-01-15 2019-07-17 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Moteur électrique et ventilateur de refroidissement
DE102018200598A1 (de) 2018-01-15 2019-07-18 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Elektromotor und Kühlerlüfter
EP3849059A1 (fr) 2018-01-15 2021-07-14 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Moteur électrique et ventilateur de refroidissement
WO2020226859A1 (fr) * 2019-05-03 2020-11-12 Lin Engineering, Inc. Géométrie pour des stators enroulés en une seule couche avec une fabricabilité élevée
CN112202255A (zh) * 2019-07-08 2021-01-08 博泽沃尔兹堡汽车零部件欧洲两合公司 电动马达和散热器风扇
EP3764513A1 (fr) 2019-07-08 2021-01-13 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Moteur électrique et ventilateur de refroidissement comprenant un tel moteur électrique
DE102019210028A1 (de) * 2019-07-08 2021-01-14 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Elektromotor und Kühlerlüfter
CN112202255B (zh) * 2019-07-08 2023-08-04 博泽沃尔兹堡汽车零部件欧洲两合公司 电动马达和散热器风扇

Also Published As

Publication number Publication date
DE202009008515U1 (de) 2010-10-28
WO2010145841A3 (fr) 2011-08-11

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