WO2002027893A1 - Rotor de moteur electrique - Google Patents

Rotor de moteur electrique Download PDF

Info

Publication number
WO2002027893A1
WO2002027893A1 PCT/JP2001/007916 JP0107916W WO0227893A1 WO 2002027893 A1 WO2002027893 A1 WO 2002027893A1 JP 0107916 W JP0107916 W JP 0107916W WO 0227893 A1 WO0227893 A1 WO 0227893A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
rotor core
punched
core
width
Prior art date
Application number
PCT/JP2001/007916
Other languages
English (en)
Japanese (ja)
Inventor
Toshihiko Futami
Yoshiaki Inaba
Kiyotaka Kawamura
Original Assignee
Toshiba Carrier Corporation
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 Toshiba Carrier Corporation filed Critical Toshiba Carrier Corporation
Priority to KR10-2003-7004234A priority Critical patent/KR20030034208A/ko
Priority to AU2001286203A priority patent/AU2001286203A1/en
Publication of WO2002027893A1 publication Critical patent/WO2002027893A1/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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect

Definitions

  • the present invention relates to a rotor of an electric motor in which a permanent magnet is fitted into a rotor core.
  • One of the concrete means is to improve the compressor that forms the refrigeration cycle. Furthermore, a brushless DC motor (electric motor) driven by digital control is used as the drive source of the compression mechanism.
  • Figure 6 shows the cross-sectional shape of the rotor of a motor, which is a brushless DC motor, conventionally developed based on the above circumstances.
  • the rotor core b is formed by laminating a plurality of thin steel plates a, and a plurality of punched holes penetrated through the rotor core and provided adjacent to each other along the outer periphery of the rotor core. and a permanent magnet d fitted into these punched holes and fixed integrally to the rotor core b.
  • the rotor core b is provided with a shaft hole e at the center thereof.
  • the center iron core f is defined between the periphery of the shaft hole and the inner periphery of the permanent magnet d
  • the magnetic pole core h is defined between the outer periphery of each permanent magnet d and the peripheral surface of the rotor core b
  • the end of the punched hole c is defined between the portion between the edge of the rotor core and the peripheral surface of the rotor core b.
  • the bridge i connects the center core f and the magnetic pole h.
  • the permanent magnet d By forming the permanent magnet d in an inverted arc shape, the flow of magnetic flux is smooth, and the harmonics are higher than in the previous structure in which the rotor jacket is covered with a stainless steel can. Eddy current loss caused by wave magnetic flux has been reduced, and efficiency has been improved.
  • another conventional rotor has a straight permanent magnet d 1 fitted into a plurality of straight punched holes c 1 provided in a rotor core b 1, and a central shaft hole e.
  • flat holes g which are holes, are continuously provided at both ends of each punched hole c1 to prevent short-circuiting of magnetic flux.
  • the portion between the edge and the peripheral surface of the rotor core b1 is referred to as a bridge portion i1.
  • the bridge portions i and i1 connect the central cores f and f1 with the magnetic pole cores h and h1, and the centrifugal force of the magnetic pole cores and the permanent magnets d and dl during rotation is reduced. I'm taking it. Therefore, the above-mentioned bridge parts i and i1 must secure a required minimum predetermined width dimension.
  • a magnetic flux for short-circuiting between the adjacent magnetic pole core h1 passes through the bridge portion i1. In order to prevent such a magnetic flux short circuit, it is desirable that the width of the bridge portion i1 be narrow.
  • the width dimension of the bridge portion i1 is set to a minimum enough to withstand centrifugal force during rotation. Nevertheless, there is still a certain amount of leakage magnetic flux, and the effective magnetic flux has decreased, and the motor characteristics have deteriorated.
  • an electromagnetic force other than the centrifugal force acts on the magnetic pole core h1.
  • this electromagnetic force also has a tangential component that is a driving torque and a moment that attempts to rotate the magnetic pole core. And the amount changes.
  • the force acting on the bridge portion i 1 is not uniform on both sides of the magnetic pole core h 1, and is a repetitive load, which easily causes breakage.
  • the width dimension of the bridge portion i1 needs to be larger than when only the centrifugal force is considered, while the effective magnetic flux is further reduced.
  • the present invention relates to a rotor in which a permanent magnet is fitted into a punched hole provided in a rotor core, with an increase in a width dimension of a bridge portion between an edge of the punched hole and a peripheral surface of the rotor core.
  • An object of the present invention is to provide a motor rotor that suppresses such an increase in leakage magnetic flux and causes less deterioration in motor characteristics.
  • a rotor core in which a plurality of thin steel plates are laminated and integrated, and a rotor core penetrated by the rotor core and provided adjacent to each other along the outer periphery of the rotor core.
  • the width between the outer circumferential surface and the circumferential surface is set to be larger (W1 ⁇ W2) than the width W1 at the end in the anti-rotation direction and the width W2 at the end in the rotation direction.
  • the permanent magnet a rare earth magnet such as neodymium, iron or boron may be used.
  • the bridge portions on both sides of the magnetic pole core are set such that the width in the rotation direction on which a larger force acts is set to be larger than the width in the opposite rotation direction.
  • FIG. 1 shows an embodiment of the present invention. View.
  • FIG. 2 is a cross-sectional view of the rotor, showing the first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view of a rotor according to a second embodiment of the present invention.
  • FIG. 4 is a partially enlarged view of the rotor of the embodiment.
  • FIG. 5 is a view for explaining the electromagnetic force acting on the magnetic pole core of the embodiment.
  • Figure 6 is a cross-sectional view of a conventional rotor.
  • FIG. 7 is a cross-sectional view of a further different conventional rotor.
  • Figure 8 is a partially enlarged view of the conventional model.
  • Figure 1 shows the completed motor rotor.
  • a large number of thin steel plates 1 are stacked, and end plates 2 are stacked on upper and lower end surfaces thereof, and are fixed to the thin steel plates 1 by rivets 3.
  • a shaft hole 4 for fitting the rotation shaft is provided in the center portion so as to penetrate the upper and lower end surfaces.
  • FIG. 2 is a cross-sectional view of the rotor, in which a rotor core 5 formed by laminating thin steel plates 1 is integrated with each other along the outer periphery of the rotor core and penetrated by the rotor core. It is composed of a plurality (four) of punching holes 6 provided adjacent to each other, and a permanent magnet 7 fitted into each of the punching holes and fixed integrally to the rotor core.
  • the rotor core 5 is provided with a shaft hole 4 at the center thereof.
  • a center core 8 between the inner shaft hole peripheral portion and the permanent magnet 7 circumference of, and c referred to between the KakuHisashi permanent magnet 7 outer periphery and the rotor core 5 circumferential surface magnetic pole core 9, punching holes 6 end
  • the bridge between the edge of the rotor core and the peripheral surface of the rotor core 5 is called a bridge portion 10.
  • the bridge 10 connects the center core 8 and the magnetic pole core 9.
  • the permanent magnet 7 is formed in an anti-arc shape together with the punched hole 6, and due to a manufacturing problem, a slight gap is formed between both end edges of the punched hole 6 and both end edges of the permanent magnet 7. Gap exists.
  • FIG. 3 shows a rotor according to another embodiment.
  • the basic configuration in which a plurality of straight punched holes 61 are provided in the rotor core 51 formed by laminating thin steel plates and the straight permanent magnets 71 are fitted therein remains unchanged.
  • the center core 81 between the circumference of the shaft hole 41 and the inner circumference of the permanent magnet and the pole core 91 between the outer circumference of each permanent magnet and the circumference of the rotor core are also the same.
  • Holes called flux barriers 20 are continuously provided at both ends of each punched hole 61 to prevent short-circuit of magnetic flux.
  • a portion between the edge of the flux snare 20 and the peripheral surface of the rotor core 91 is called a bridge portion 100.
  • the magnetic pole core 9 1 is assumed to be rotated in the counterclockwise direction, which is the direction of the arrow.
  • the width dimension W2 of the bridge portion 100a on the rotation direction is the width dimension W of the bridge portion 100b on the opposite rotation direction. It is formed larger than 1 (W 1 and W 2).
  • the short-circuited magnetic flux between the magnetic pole cores 91 passing through the bridge portion 100 also passes through the narrower bridge portion 100b on the non-rotational direction side. Even if the width of the bridge portion 100a on the side is large, the short-circuit magnetic flux does not increase so much.
  • the rotor provided with the flux snare 20 at the end of the punched hole 61 into which the permanent magnet 71 of the rotor core 51 is fitted is used as the flux barrier. Comparatively provided on the periphery Because of the large holes, the strength around the black spear is low.
  • the width between the edge of the punched hole and the peripheral surface of the rotor core 51 is defined as the width of the end in the anti-rotational direction, W
  • rotors using rare earth magnets such as neodymium, iron, boron, etc. for the permanent magnets 7, 71 have a large torque for their size, but the same setting conditions are used. Therefore, it is possible to prevent breakage of the bridge portions 100 and 100, thereby improving reliability, suppressing an increase in leakage magnetic flux due to an increase in the width of the bridge portion, and lessening deterioration of motor characteristics. You can get the rotor.
  • the width of the ridge on both sides of the magnetic pole core is set to be larger in the rotational direction where a larger force is applied than in the opposite direction.
  • an increase in the leakage flux due to an increase in the width of the bridge portion is suppressed, and the effect of reducing the deterioration of the motor characteristics is achieved.
  • the present invention is effective in the technical field of the rotor of an electric motor in suppressing the increase in the leakage magnetic flux due to the increase in the width of the bridge portion and preventing the deterioration of the electric motor characteristics. It is.

Landscapes

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

Abstract

L'invention concerne un rotor de moteur électrique comprenant un noyau (5) d'induit formé d'un seul tenant par l'empilement d'une pluralité de tôles (1) d'acier, et présentant une pluralité d'orifices (6) découpés traversant le rotor situées le long du pourtour externe du noyau (5) d'induit et adjacentes les unes aux autres dans lesquels sont insérés des aimants (7) permanents montés de manière à être incorporés au noyau (5) d'induit. Les parties (10) ponts formées entre le bord des extrémités des orifices découpés et la surface périphérique du noyau d'induit sont conçues de manière que la largeur (W2) du pont (10a) du côté de rotation est supérieure à la largeur (W1) du pont (10b) formé du côté anti-rotation (W1 < W2) des extrémités des orifices découpés adjacents. On peut ainsi supprimer les fuites magnétiques accrues causées par l'augmentation de la largeur du pont afin d'empêcher la détérioration des caractéristiques du moteur.
PCT/JP2001/007916 2000-09-25 2001-09-12 Rotor de moteur electrique WO2002027893A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR10-2003-7004234A KR20030034208A (ko) 2000-09-25 2001-09-12 전동기의 회전자
AU2001286203A AU2001286203A1 (en) 2000-09-25 2001-09-12 Rotor of electric motor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000291076A JP2002101586A (ja) 2000-09-25 2000-09-25 電動機の回転子
JP2000-291076 2000-09-25

Publications (1)

Publication Number Publication Date
WO2002027893A1 true WO2002027893A1 (fr) 2002-04-04

Family

ID=18774210

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/007916 WO2002027893A1 (fr) 2000-09-25 2001-09-12 Rotor de moteur electrique

Country Status (5)

Country Link
JP (1) JP2002101586A (fr)
KR (1) KR20030034208A (fr)
CN (1) CN1466805A (fr)
AU (1) AU2001286203A1 (fr)
WO (1) WO2002027893A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004021544A2 (fr) * 2002-08-28 2004-03-11 Emerson Electric Co. Machine a aimant permanent interieur avec broutement d'aimant reduit
WO2004021551A3 (fr) * 2002-08-28 2004-07-01 Emerson Electric Co Machine a aimants permanents
US6946766B2 (en) 2002-08-28 2005-09-20 Emerson Electric Co. Permanent magnet machine
US20150137649A1 (en) * 2013-11-20 2015-05-21 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg Method for producing a rotor and electric machine having a rotor
EP2696472A3 (fr) * 2012-08-10 2017-01-04 Aisin Seiki Kabushiki Kaisha Noyau rotorique et moteur comprenant ce noyau rotorique

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10316831A1 (de) 2002-04-15 2003-11-27 Denso Corp Permanentmagnetrotor für eine rotierende elektrische Maschine mit Innenrotor und magnetsparender Rotor für einen Synchronmotor
JP2006014520A (ja) * 2004-06-28 2006-01-12 Toshiba Corp 回転電機の外転型回転子
JP5114963B2 (ja) * 2007-02-13 2013-01-09 ダイキン工業株式会社 永久磁石埋め込み型ロータ
JP4719183B2 (ja) * 2007-05-31 2011-07-06 トヨタ自動車株式会社 回転電機
JP2010158085A (ja) * 2008-12-26 2010-07-15 Mitsubishi Electric Corp 永久磁石型モータの回転子
JP5260563B2 (ja) * 2010-01-07 2013-08-14 株式会社日立製作所 永久磁石式発電機またはモータ
CN101964556B (zh) * 2010-09-13 2013-05-01 精进电动科技（北京）有限公司 一种起动发电一体电机的转子装置和转子工作系统
KR102483226B1 (ko) 2014-06-27 2023-01-03 삼성전자주식회사 모터 및 모터의 회전자
WO2016021651A1 (fr) * 2014-08-06 2016-02-11 日本発條株式会社 Moteur
CN106300729B (zh) * 2015-05-29 2019-11-12 珠海格力电器股份有限公司 永磁电机转子及永磁同步电机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09271151A (ja) * 1996-03-29 1997-10-14 Hitachi Ltd 永久磁石回転電機及びそれを用いた電動車両
JPH1127882A (ja) * 1997-07-02 1999-01-29 Sanyo Electric Co Ltd 電動機の回転子
JP2000184640A (ja) * 1998-12-09 2000-06-30 Aichi Emerson Electric Co Ltd 永久磁石回転子
JP2000228850A (ja) * 1999-02-05 2000-08-15 Matsushita Electric Ind Co Ltd 希土類樹脂磁石埋設型回転子の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09271151A (ja) * 1996-03-29 1997-10-14 Hitachi Ltd 永久磁石回転電機及びそれを用いた電動車両
JPH1127882A (ja) * 1997-07-02 1999-01-29 Sanyo Electric Co Ltd 電動機の回転子
JP2000184640A (ja) * 1998-12-09 2000-06-30 Aichi Emerson Electric Co Ltd 永久磁石回転子
JP2000228850A (ja) * 1999-02-05 2000-08-15 Matsushita Electric Ind Co Ltd 希土類樹脂磁石埋設型回転子の製造方法

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004021544A2 (fr) * 2002-08-28 2004-03-11 Emerson Electric Co. Machine a aimant permanent interieur avec broutement d'aimant reduit
WO2004021544A3 (fr) * 2002-08-28 2004-05-06 Emerson Electric Co Machine a aimant permanent interieur avec broutement d'aimant reduit
WO2004021551A3 (fr) * 2002-08-28 2004-07-01 Emerson Electric Co Machine a aimants permanents
US6946766B2 (en) 2002-08-28 2005-09-20 Emerson Electric Co. Permanent magnet machine
EP2696472A3 (fr) * 2012-08-10 2017-01-04 Aisin Seiki Kabushiki Kaisha Noyau rotorique et moteur comprenant ce noyau rotorique
US20150137649A1 (en) * 2013-11-20 2015-05-21 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg Method for producing a rotor and electric machine having a rotor
US9673670B2 (en) * 2013-11-20 2017-06-06 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg Method for producing a rotor and electric machine having a rotor

Also Published As

Publication number Publication date
JP2002101586A (ja) 2002-04-05
AU2001286203A1 (en) 2002-04-08
CN1466805A (zh) 2004-01-07
KR20030034208A (ko) 2003-05-01

Similar Documents

Publication Publication Date Title
US11277045B2 (en) Radially embedded permanent magnet rotor and methods thereof
JP4672083B2 (ja) 誘導電動機の回転子及び誘導電動機及び圧縮機及び送風機及び空気調和機
KR100609331B1 (ko) 영구자석전동기
EP1624553B1 (fr) Moteur synchrone à aimants permanents
JP4591085B2 (ja) 永久磁石型電動機
JP5279777B2 (ja) 同期電動機の回転子
US9461510B2 (en) Permanent magnet electrical machine
US20080093944A1 (en) Permanent-magnet reluctance electrical rotary machine
WO2002027893A1 (fr) Rotor de moteur electrique
US20140103772A1 (en) Radially embedded permanent magnet rotor and methods thereof
JP2002084722A (ja) 永久磁石電動機
JP2010207080A (ja) 電気機械
JP3832530B2 (ja) 永久磁石電動機
JP4084889B2 (ja) 永久磁石形電動機の回転子
CN109104014B (zh) 一种四相双绕组游标电机
CN208241435U (zh) 转子、电机和压缩机
JP3818341B2 (ja) 永久磁石電動機
JP4080273B2 (ja) 永久磁石埋め込み型電動機
CN108832791B (zh) 一种高功率密度高效率高可靠性的磁爪电机
JP2000333390A (ja) 永久磁石電動機
US20030020355A1 (en) Pole plate structure for a motor stator
CN208675081U (zh) 一种高功率密度高效率高可靠性的磁爪电机
JP4696642B2 (ja) モータ、送風機、圧縮機及び空気調和機
CN110620452A (zh) 转子、电机和压缩机
JPH1198730A (ja) 永久磁石電動機

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PH PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1020037004234

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 018162223

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 1020037004234

Country of ref document: KR

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
WWR Wipo information: refused in national office

Ref document number: 1020037004234

Country of ref document: KR