WO2017064938A1 - Machine dynamoélectrique - Google Patents

Machine dynamoélectrique Download PDF

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Publication number
WO2017064938A1
WO2017064938A1 PCT/JP2016/076002 JP2016076002W WO2017064938A1 WO 2017064938 A1 WO2017064938 A1 WO 2017064938A1 JP 2016076002 W JP2016076002 W JP 2016076002W WO 2017064938 A1 WO2017064938 A1 WO 2017064938A1
Authority
WO
WIPO (PCT)
Prior art keywords
holding member
permanent magnet
rotor core
electrical machine
rotating electrical
Prior art date
Application number
PCT/JP2016/076002
Other languages
English (en)
Japanese (ja)
Inventor
佳宏 松岡
Original Assignee
株式会社エクセディ
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 株式会社エクセディ filed Critical 株式会社エクセディ
Priority to CN201680047555.9A priority Critical patent/CN107925286A/zh
Publication of WO2017064938A1 publication Critical patent/WO2017064938A1/fr

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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
    • 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
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to a rotating electrical machine.
  • Hybrid cars and electric cars have a rotating electric machine as a power source.
  • hybrid cars and electric cars widely employ IPM (Interior / Permanent / Magnet) motors in which permanent magnets are embedded in a rotor core as rotating electric machines.
  • the rotor core of this IPM motor has a plurality of pairs of receiving holes extending in the axial direction (see Patent Document 1).
  • a permanent magnet is inserted into each of the accommodation holes.
  • the bridge portion between the paired accommodation holes is preferably as thin as possible in order to suppress magnetic leakage.
  • An object of the present invention is to provide a rotating electrical machine that can make a bridge portion thin while preventing breakage of the bridge portion.
  • a rotating electrical machine includes a stator, a rotor core, a permanent magnet, and a holding member.
  • the rotor core is rotatably arranged on the radially inner side of the stator.
  • the rotor core has at least a pair of housing holes extending in the axial direction and a bridge portion disposed between the pair of housing holes in the circumferential direction.
  • the permanent magnet is accommodated in the accommodation hole.
  • the holding member is fixed to the rotor core in the accommodation hole and holds the permanent magnet.
  • the holding member has an anchor portion that bites into the rotor core on the radially inner side of the permanent magnet.
  • a part of load which acts on a bridge part can be disperse
  • the holding member includes a first holding member and a second holding member that are spaced apart from each other in the circumferential direction.
  • the permanent magnet is disposed between the first holding member and the second holding member.
  • the first holding member has a first anchor portion.
  • the first anchor portion extends toward the second holding member on the radially inner side of the permanent magnet and bites into the rotor core.
  • the second holding member has a second anchor portion. The second anchor portion extends toward the first holding member on the radially inner side of the permanent magnet and bites into the rotor core.
  • the holding member is made of a nonmagnetic metal.
  • the holding member has a cooling channel configured to allow the coolant to flow.
  • the bridge portion can be made thin while preventing damage to the bridge portion.
  • the front view of a rotary electric machine The front view of a rotor core. The enlarged view of a rotor.
  • the axial direction indicates the direction in which the rotation axis extends.
  • the radial direction indicates the radial direction of a circle around the rotation axis.
  • the circumferential direction indicates the circumferential direction of a circle around the rotation axis.
  • the rotating electrical machine 100 includes a stator 1 and a rotor 2.
  • a rotor 2 is rotatably disposed inside the stator 1 in the radial direction.
  • the rotating electrical machine 100 functions as, for example, a motor.
  • the rotating electrical machine 100 is specifically an IPM (Interior Permanent Magnet) motor.
  • the stator 1 has a substantially cylindrical shape.
  • the stator 1 has a stator core 11 and a stator coil 12 wound around the stator core 11.
  • the stator core 11 is formed by laminating a plurality of electromagnetic steel plates in the axial direction.
  • the rotor 2 includes a rotor core 21, a plurality of permanent magnets 22, and a plurality of holding members 23.
  • the rotor 2 is configured to be rotatable about the rotation axis O on the radially inner side of the stator 1.
  • the rotor core 21 is substantially cylindrical and has a mounting hole 211 extending in the axial direction. An output shaft is attached to the attachment hole 211.
  • the rotor core 21 is formed by laminating a plurality of electromagnetic steel plates in the axial direction.
  • the rotor core 21 is disposed so as to be rotatable about the rotation axis O on the radially inner side of the stator 1.
  • FIG. 2 is a front view showing the rotor core 21.
  • the rotor core 21 has a plurality of pairs of accommodation holes 212 and a plurality of bridge portions 213.
  • Each accommodation hole 212 extends in the axial direction.
  • the respective accommodation holes 212 are arranged at intervals in the circumferential direction.
  • the accommodation hole pair 210 which became a pair via the bridge part 213 is arrange
  • Each accommodation hole 212 is arranged at the outer peripheral end of the rotor core 21.
  • the two accommodation holes 212 that are paired are arranged at intervals in the circumferential direction.
  • a bridge portion 213 is disposed between the two accommodation holes 212.
  • the bridge portion 213 extends in the radial direction.
  • the pair of accommodation holes 212 are arranged in a V shape when viewed in the axial direction.
  • FIG. 3 is an enlarged view showing details of the rotor 2. As shown in FIG. 3, each permanent magnet 22 is accommodated in the accommodation hole 212. Each permanent magnet 22 extends in the axial direction. The pair of permanent magnets 22 are arranged in a V shape when viewed in the axial direction.
  • the holding member 23 is fixed to the rotor core 21 in the housing portion 223. Specifically, the holding member 23 is fixed to the rotor core 21 in the housing portion 223 by fitting in the housing portion 223. The holding member 23 holds the permanent magnet 22.
  • the holding member 23 includes a first holding member 231 and a second holding member 232.
  • the 1st holding member 231 and the 2nd holding member 232 are arrange
  • the first holding member 231 is disposed on the bridge portion 213 side in the accommodation hole 212.
  • the second holding member 232 is disposed at a position away from the bridge portion 213 in the accommodation hole 212.
  • the permanent magnet 22 is disposed between the first holding member 231 and the second holding member 232.
  • the first holding member 231 includes a first holding main body portion 2311 and a first anchor portion 2312.
  • the first holding main body portion 2311 and the first anchor portion 2312 are integrally configured by one member.
  • the first holding main body portion 2311 is in contact with the first side surface of the permanent magnet 22 on the bridge portion 213 side.
  • the first holding main body 2311 extends in the radial direction.
  • the first anchor portion 2312 bites into the rotor core 21 on the inner side in the radial direction than the permanent magnet 22. Specifically, the first anchor portion 2312 extends from the radially inner end portion of the first holding main body portion 2311 toward the second holding member 232 side. That is, the first anchor part 2312 extends in a direction away from the bridge part 213. Specifically, the first anchor portion 2312 extends toward the second holding member 232 from the surface that contacts the permanent magnet 22 of the first holding main body portion 2311.
  • the first holding member 231 has a first support portion 2313.
  • the first support portion 2313 is configured integrally with the first holding main body portion 2311.
  • the first support portion 2313 supports the permanent magnet 22 from the outside in the radial direction.
  • the first support portion 2313 extends from the radially outer end portion of the first holding body portion 2311 toward the second holding member 232. That is, the first support portion 2313 extends in substantially the same direction as the first anchor portion 2312.
  • the second holding member 232 includes a second holding main body portion 2321 and a second anchor portion 2322.
  • the 2nd holding main-body part 2321 and the 2nd anchor part 2322 are comprised integrally by one member.
  • the second holding main body portion 2321 is in contact with the second side surface opposite to the first side surface of the permanent magnet 22.
  • the second holding main body portion 2321 extends in the radial direction.
  • the second anchor portion 2322 bites into the rotor core 21 on the inner side in the radial direction than the permanent magnet 22. Specifically, the second anchor portion 2322 extends from the radially inner end of the second holding main body portion 2321 to the first holding member 231 side. That is, the second anchor portion 2322 extends toward the bridge portion 213. Specifically, the second anchor portion 2322 extends toward the first holding member 231 from the surface of the second holding main body portion 2321 that contacts the permanent magnet 22.
  • the second holding member 232 has a second support portion 2323.
  • the second support portion 2323 supports the permanent magnet 22 from the outside in the radial direction.
  • the second support portion 2323 extends from the radially outer end portion of the second holding main body portion 2321 toward the first holding member 231. That is, the second support portion 2323 extends in substantially the same direction as the second anchor portion 2322.
  • the second holding member 232 has a cooling channel 2324.
  • the cooling flow path 2324 extends in the axial direction. By flowing cooling oil (an example of a refrigerant) through the cooling flow path 2324, the permanent magnet 22 in contact with the second holding member 232 can be cooled.
  • the first holding member 231 and the second holding member 232 are preferably made of a nonmagnetic metal. Specifically, the first and second holding members 231 and 232 are formed of at least one selected from the group consisting of aluminum alloys.
  • the permanent magnet 22 is held by the first holding member 231 and the second holding member 232. For this reason, even if the rotor 2 rotates and a centrifugal force acts on the permanent magnet 22, the load applied to the bridge portion 213 can be reduced. For example, since the load is applied to the portions where the first and second anchor portions 2312 and 2322 of the first and second holding members 231 and 232 bite, the load applied to the bridge portion 213 can be reduced. . Thus, since the load applied to the bridge portion 213 is reduced, the bridge portion 213 can be made thin.
  • the holding member 23 is configured by two members, the first holding member 231 and the second holding member 232, but the configuration of the holding member 23 is not limited to this.
  • the holding member 23 may be constituted by one member or may be constituted by three or more members.
  • the second holding member 232 has the cooling flow path 2324, but the first holding member 231 may have the cooling flow path, or the first and second holding members 231, 232. Both of them may have a cooling channel, and the first and second holding members 231 and 232 may not have a cooling channel.

Landscapes

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

Abstract

L'invention porte sur une machine dynamoélectrique (100) comprenant un stator (1), un noyau de rotor (21), un aimant permanent (22) et un élément de retenue (23). Le noyau de rotor (21) comprend au moins une paire de trous de logement s'étendant dans la direction axiale, et une partie pont qui est agencée entre les deux trous de logement dans la direction radiale. L'aimant permanent (22) est contenu dans un trou de logement. L'élément de retenue (23) est fixé au noyau de rotor (21) et retient l'aimant permanent (22) dans le trou de logement.
PCT/JP2016/076002 2015-10-16 2016-09-05 Machine dynamoélectrique WO2017064938A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680047555.9A CN107925286A (zh) 2015-10-16 2016-09-05 旋转电机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015204913A JP2017077142A (ja) 2015-10-16 2015-10-16 回転電機
JP2015-204913 2015-10-16

Publications (1)

Publication Number Publication Date
WO2017064938A1 true WO2017064938A1 (fr) 2017-04-20

Family

ID=58517531

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/076002 WO2017064938A1 (fr) 2015-10-16 2016-09-05 Machine dynamoélectrique

Country Status (3)

Country Link
JP (1) JP2017077142A (fr)
CN (1) CN107925286A (fr)
WO (1) WO2017064938A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019009866A (ja) * 2017-06-21 2019-01-17 トヨタ自動車株式会社 回転電機のロータ
CN109617273A (zh) * 2017-10-04 2019-04-12 本田技研工业株式会社 旋转电机的转子
JP2020141468A (ja) * 2019-02-27 2020-09-03 トヨタ自動車株式会社 回転電機のロータ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007104888A (ja) * 2005-09-07 2007-04-19 Toshiba Corp 回転電機
JP2011147323A (ja) * 2010-01-18 2011-07-28 Toyota Motor Corp Ｉｐｍモータ用ロータとｉｐｍモータ
JP2013524757A (ja) * 2010-03-30 2013-06-17 ボルボ テクノロジー コーポレイション 埋込型永久磁石を備えた電気機械の回転子及び電気機械
JP2014079044A (ja) * 2012-10-09 2014-05-01 Denso Corp 積層鋼板の製造方法、および、積層鋼板

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007104888A (ja) * 2005-09-07 2007-04-19 Toshiba Corp 回転電機
JP2011147323A (ja) * 2010-01-18 2011-07-28 Toyota Motor Corp Ｉｐｍモータ用ロータとｉｐｍモータ
JP2013524757A (ja) * 2010-03-30 2013-06-17 ボルボ テクノロジー コーポレイション 埋込型永久磁石を備えた電気機械の回転子及び電気機械
JP2014079044A (ja) * 2012-10-09 2014-05-01 Denso Corp 積層鋼板の製造方法、および、積層鋼板

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019009866A (ja) * 2017-06-21 2019-01-17 トヨタ自動車株式会社 回転電機のロータ
CN109617273A (zh) * 2017-10-04 2019-04-12 本田技研工业株式会社 旋转电机的转子
US10868450B2 (en) 2017-10-04 2020-12-15 Honda Motor Co., Ltd. Rotor of rotary electric machine
CN109617273B (zh) * 2017-10-04 2021-08-13 本田技研工业株式会社 旋转电机的转子
JP2020141468A (ja) * 2019-02-27 2020-09-03 トヨタ自動車株式会社 回転電機のロータ

Also Published As

Publication number Publication date
JP2017077142A (ja) 2017-04-20
CN107925286A (zh) 2018-04-17

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