WO2022176829A1 - ロータ - Google Patents

ロータ Download PDF

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Publication number
WO2022176829A1
WO2022176829A1 PCT/JP2022/005829 JP2022005829W WO2022176829A1 WO 2022176829 A1 WO2022176829 A1 WO 2022176829A1 JP 2022005829 W JP2022005829 W JP 2022005829W WO 2022176829 A1 WO2022176829 A1 WO 2022176829A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor core
rotor
axis
grooves
motor
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.)
Ceased
Application number
PCT/JP2022/005829
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
健 城崎
利典 大河内
佳純 北原
隆浩 小田木
正幸 池本
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.)
Toyota Motor Corp
Aisin Corp
Original Assignee
Toyota Motor Corp
Aisin Corp
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 Toyota Motor Corp, Aisin Corp filed Critical Toyota Motor Corp
Priority to CN202280014784.6A priority Critical patent/CN116897493A/zh
Priority to EP22756147.9A priority patent/EP4297243A4/en
Priority to US18/277,154 priority patent/US12512711B2/en
Priority to JP2023500839A priority patent/JPWO2022176829A1/ja
Publication of WO2022176829A1 publication Critical patent/WO2022176829A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • 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 present disclosure relates to rotors, and more particularly to rotors that include a rotor core and a plurality of permanent magnets.
  • a rotor of this type has been proposed that includes a rotor core (rotor body) and a plurality of permanent magnets (see Patent Document 1, for example).
  • a plurality of permanent magnets are embedded in a plurality of slots (insertion holes) formed in the rotor core to form a plurality of magnetic poles.
  • grooves are formed between the magnetic poles on the outer peripheral surface of the rotor core, and the depth from the outer peripheral surface is greater than the minimum depth from the outer peripheral surface of the slot. , suppresses iron loss.
  • the position between the magnetic poles corresponds to the position of the q-axis during operation of the motor using this rotor.
  • the inventors have found that the average torque of the motor (the average value of the instantaneous torque over a predetermined time period when the motor is subjected to maximum torque control at the rated current) deteriorates.
  • the depth of the groove from the outer peripheral surface is greater than the minimum depth of the slot from the outer peripheral surface, the provision of such a groove reduces the strength of the rotor core.
  • the main purpose of the rotor of the present disclosure is to suppress a decrease in the average torque of the motor and a decrease in the strength of the rotor core.
  • the rotor of the present disclosure employs the following means in order to achieve the main purpose described above.
  • the rotor of the present disclosure includes: a rotor core; a plurality of permanent magnets forming a plurality of magnetic poles, embedded in corresponding embedding holes so as to form flux barriers at both ends of a plurality of embedding holes formed in the rotor core;
  • a rotor for use in a motor comprising: A plurality of grooves are formed on the outer peripheral surface of the rotor core, a plurality of said grooves are arranged symmetrically with respect to said axis away from an axis which forms a q-axis when said motor is operated, wherein two said grooves form a pair;
  • a first angle formed by two straight lines passing through the pair of grooves and the center of the rotor core is defined by the following: The gist is that it is smaller than the second angle to form.
  • the rotor of the present disclosure has a plurality of grooves formed on the outer peripheral surface of the rotor core.
  • the plurality of grooves are arranged symmetrically with respect to the q-axis when two grooves are paired and separated from the q-axis when the motor is operated.
  • the average torque of the motor the average value of the instantaneous torque over a predetermined period of time when the motor is subjected to maximum torque control at the rated current.
  • the first angle formed by two straight lines passing through the two paired grooves and the center of the rotor core is the second angle formed by the shaft-side end surfaces of the two adjacent flux barriers with the shaft interposed therebetween. make smaller.
  • a decrease in the strength of the rotor core can be suppressed.
  • the plurality of grooves have a depth from the outer peripheral surface of the rotor core to the embedding hole closest to the tip of the rotor core, the tip of which is farther from the shaft than the circumferential ends of the rotor core. may be formed so as to be closer to the axis than the portion where the is the minimum.
  • the plurality of grooves are formed such that the depth from the outer peripheral surface of the rotor core is shallower than the minimum depth from the outer peripheral surface to the embedding hole. good too. By doing so, it is possible to further suppress a decrease in the strength of the rotor core.
  • the plurality of embedded holes are formed in the rotor core so that two embedded holes that form a pair form a substantially V shape that separates from each other as it goes from the center side of the rotor core to the outer peripheral side.
  • the plurality of permanent magnets may be embedded in the embedding holes so that the two permanent magnets embedded in the two embedding holes forming a pair form one magnetic pole. good.
  • the motor of the present disclosure is a stator formed in a cylindrical shape and having a plurality of teeth protruding radially inward at circumferentially spaced intervals on an inner peripheral surface;
  • the rotor of the present disclosure in any of the above-described aspects, ie, basically a rotor core, rotatably arranged in the stator via an air gap, and both ends of a plurality of embedded holes formed in the rotor core and a plurality of permanent magnets forming a plurality of magnetic poles embedded in the corresponding embedded holes so as to form a flux barrier in the rotor for use in a motor, wherein a plurality of permanent magnets are formed on the outer peripheral surface of the rotor core.
  • a plurality of grooves are formed, and the plurality of grooves are arranged symmetrically with respect to the q-axis when two grooves form a pair and are separated from the q-axis when the motor is operated.
  • the first angle formed by two straight lines passing through the two grooves forming a pair and the center of the rotor core is defined by the axis-side ends of the two flux barriers adjacent to each other across the axis and the center.
  • a motor comprising The gist is that the plurality of grooves are formed such that the first angle is the same as the angle formed by the two circumferential outer side surfaces of the tooth.
  • the motor of the present disclosure includes the rotor of the present disclosure in any of the above-described aspects, the effect of the rotor of the present disclosure, for example, the effect of suppressing a decrease in the average torque of the motor and a decrease in the strength of the rotor core. etc.
  • the plurality of grooves are formed so that the first angle and the angle formed by the two outer side surfaces of the teeth in the circumferential direction are the same, the teeth face the q-axis when the rotor rotates.
  • the change in the stator magnetic flux due to the difference between the magnetic resistance when the teeth do not face the q-axis (when the slots between the teeth face each other) can be made sinusoidal, A reduction in torque ripple can be achieved.
  • FIG. 1 is a configuration diagram showing a schematic configuration of a motor 20 having a rotor according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram showing an enlarged cross-section of a main part of the motor 20
  • FIG. It is the schematic which expanded the cross section of the groove part 330c.
  • FIG. 5 is an explanatory diagram for explaining angles ⁇ 3 to ⁇ 5;
  • FIG. 1 is a configuration diagram showing a schematic configuration of a motor 20 having a rotor as one embodiment of the present disclosure.
  • FIG. 2 is a schematic enlarged cross-sectional view of a main part of the motor 20.
  • FIG. 3 is a schematic diagram showing an enlarged cross section of the groove portion 330c.
  • FIG. 4 is an explanatory diagram for explaining the angles ⁇ 3 to ⁇ 5.
  • the motor 20 is, for example, a three-phase AC motor used as a driving source or generator for electric vehicles and hybrid vehicles, and includes a stator 22 and a rotor 30 as shown.
  • the stator 22 includes a stator core 220 and a plurality of coils (not shown), as shown in FIG.
  • Stator core 220 is formed by laminating a plurality of electromagnetic steel plates formed in an annular shape by pressing, for example, and is formed in a cylindrical shape as a whole.
  • the stator core 220 includes a plurality of teeth 220t protruding radially inward at intervals in the circumferential direction from an outer peripheral portion (yoke) and having flange portions 220tb that are wide in the circumferential direction at the tips thereof, and between adjacent teeth 220t.
  • An insulator (insulating paper) (not shown) is placed in each slot 220s.
  • the rotor 30 is rotatably arranged inside the stator 22 via an air gap, and as shown in FIGS. , provided.
  • the rotor core 330 is fixed to a rotating shaft (not shown), and is formed by laminating a plurality of annular core plates made of electromagnetic steel plates or the like. As shown in FIGS. 1 and 2, the rotor core 330 includes a central hole 330a into which the above-described rotating shaft is inserted and fixed, a plurality of (in the embodiment, for example, 16) magnet embedding holes 330b, and a plurality (in the embodiment, for example, 16) magnet embedding holes 330b. For example, 16 grooves 330c are formed. The plurality of grooves 330c will be described later.
  • the plurality of magnet embedding holes 330b are arranged in the rotor core 330 at predetermined intervals (45° intervals in the embodiment) so as to penetrate the rotor core 330 in the axial direction.
  • the paired two magnet embedding holes 330b are formed so as to separate from each other (in a substantially V-shape) as they go from the axial center side of the rotor 30 toward the outer peripheral side.
  • Each magnet embedding hole 330 b has a width longer than the width of the permanent magnet 332 .
  • the permanent magnet 332 is, for example, a rare earth sintered magnet such as a neodymium magnet, and is formed in a substantially rectangular parallelepiped shape.
  • the two permanent magnets 332 forming a pair are inserted and fixed in the corresponding magnet embedding holes 330b so that the poles located on the outer peripheral side of the rotor 30 are the same.
  • the two permanent magnets 332 forming a pair are arranged in the rotor core 330 so as to be spaced apart from each other from the axial center side of the rotor 30 toward the outer peripheral side thereof to form one magnetic pole of the rotor 30 .
  • the rotor 30 of the motor 20 configured in this manner is rotated by supplying an alternating current to each coil from an inverter (not shown) that is PWM controlled.
  • the plurality of grooves 330c will be described. As shown in FIG. 2, the plurality of grooves 330c are formed on the outer peripheral surface of rotor core 330 so as to extend in the axial direction. The plurality of grooves 330c are spaced apart from the corresponding axis A among the plurality of (eight in the embodiment) axes A that form a pair of two grooves 330c and become the q-axis when the motor 20 is operated. arranged symmetrically. As a result, a decrease in the average torque of the motor 20 (the average value of the instantaneous torque over a predetermined period of time when the motor 20 is subjected to maximum torque control at the rated current) can be suppressed.
  • the average torque of the motor 20 the average value of the instantaneous torque over a predetermined period of time when the motor 20 is subjected to maximum torque control at the rated current
  • two straight lines L1 and L2 formed by two paired grooves 330c and center C of rotor core 330 form a first line.
  • the angle ⁇ 1 is the angle formed by two straight lines L3 and L4 parallel to the end faces FBt on the axis A side of the two flux barriers FB adjacent to each other across the axis A, that is, the two flux barriers FB adjacent to each other across the axis A. is smaller than the second angle ⁇ 2 formed by the end face FBt on the axis A side of the .
  • the pair of two grooves 330c are formed closer to the axis A than the adjacent flux barriers FB with the axis A interposed therebetween.
  • the two straight lines L1 and L2 may be straight lines passing through any position of the pair of two groove portions 330c.
  • the plurality of grooves 330c have a depth D at the deepest point from the outer peripheral surface of the rotor core 330, which is greater than the depth from the outer peripheral surface to the nearest magnet embedding hole 330b. It is formed so as to be shallower than the minimum value Dmin.
  • the thickness of the rotor core 330 at the upper end of the flux barrier FB becomes larger than that at other portions. Since it is thin, if a plurality of grooves 330c are formed, the strength will decrease. Further, when the plurality of grooves 330c are formed deep, the rotor core 330 becomes thin at the locations where the grooves 330c are formed, and thus the strength of the rotor core 330 is reduced compared to when the grooves 330c are formed shallow. In the embodiment, by forming a plurality of grooves 330c as described above, a decrease in strength of rotor core 330 can be suppressed.
  • the plurality of grooves 330c have a first angle ⁇ 1 and two circumferential outer surfaces Pt1 of the tooth 220t when a straight line L5 passing through the center and the center C of the tooth 220t overlaps with the axis A. , Pt2 are formed to be the same. This is due to the difference between the magnetic resistance when the teeth 220t face the q-axis and the magnetic resistance when the teeth 220t do not face the q-axis (when the slots 220s face) when the rotor 30 rotates. This is because the change in is sinusoidal. As a result, torque ripple can be reduced.
  • the groove 330cR on the right side of the axis A in FIG. 4 is formed in the same manner as the groove 330cL. Thereby, it is possible to reduce the torque ripple caused by the slots 220s.
  • a plurality of grooves 330c are formed on the outer peripheral surface of the rotor core 330, and the plurality of grooves 330c are formed in pairs when the motor 20 operates.
  • a second line formed by two straight lines L1 and L2 passing through the center C of the rotor core 330 and the two paired grooves 330c in the cross section of the rotor core 330.
  • the plurality of grooves 330c are formed so that the depth D from the outer peripheral surface of the rotor core 330 is shallower than the minimum value Dmin of the depth from the outer peripheral surface to the nearest magnet embedding hole 330b. to form.
  • the depth D may be as deep as the minimum value Dmin or deeper than the minimum value Dmin.
  • flanges 220tb wide in the circumferential direction are formed at the tips of a plurality of teeth 220t.
  • the plurality of teeth 220t may be formed so as to taper in the radial direction without forming the flange portion 220tb on the plurality of teeth 220t, or the circumferential width may be formed constant in the radial direction.
  • the groove portion 330cR among the plurality of groove portions 330c may be formed in the same manner as the groove portion 330cL.
  • the rotor core 330 corresponds to the "rotor core”
  • the permanent magnet 332 corresponds to the "permanent magnet”
  • the groove 330c corresponds to the "groove”.
  • the present disclosure can be used in the rotor manufacturing industry and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2022/005829 2021-02-16 2022-02-15 ロータ Ceased WO2022176829A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202280014784.6A CN116897493A (zh) 2021-02-16 2022-02-15 转子
EP22756147.9A EP4297243A4 (en) 2021-02-16 2022-02-15 ROTOR
US18/277,154 US12512711B2 (en) 2021-02-16 2022-02-15 Rotor with magnet and embedding holes
JP2023500839A JPWO2022176829A1 (https=) 2021-02-16 2022-02-15

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-022727 2021-02-16
JP2021022727 2021-02-16

Publications (1)

Publication Number Publication Date
WO2022176829A1 true WO2022176829A1 (ja) 2022-08-25

Family

ID=82931739

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/005829 Ceased WO2022176829A1 (ja) 2021-02-16 2022-02-15 ロータ

Country Status (5)

Country Link
US (1) US12512711B2 (https=)
EP (1) EP4297243A4 (https=)
JP (1) JPWO2022176829A1 (https=)
CN (1) CN116897493A (https=)
WO (1) WO2022176829A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007097387A (ja) * 2005-08-31 2007-04-12 Toshiba Corp 回転電機
WO2008153171A1 (ja) * 2007-06-13 2008-12-18 Toyota Jidosha Kabushiki Kaisha 回転電機
JP2009118687A (ja) * 2007-11-08 2009-05-28 Nissan Motor Co Ltd 永久磁石式回転機
JP2020156192A (ja) 2019-03-19 2020-09-24 日鉄日新製鋼株式会社 Ｉｐｍモータのロータ

Family Cites Families (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6133662A (en) * 1996-09-13 2000-10-17 Hitachi, Ltd. Permanent magnet dynamoelectric rotating machine and electric vehicle equipped with the same
JP3746372B2 (ja) * 1998-04-16 2006-02-15 株式会社日立製作所 永久磁石式回転電機及びそれを用いた電動車両
DE60141308D1 (de) * 2000-03-31 2010-04-01 Sanyo Electric Co Synchronmotor mit internem Dauermagnet
JP3787756B2 (ja) * 2000-08-29 2006-06-21 株式会社日立製作所 永久磁石式回転電機
US6917133B2 (en) * 2000-08-29 2005-07-12 Hitachi, Ltd. Air conditioner having permanent magnet rotating electric machine
TW538578B (en) * 2000-09-13 2003-06-21 Sanyo Electric Co Synchronous motor with built-in type permanent magnet
US6867526B2 (en) * 2001-09-05 2005-03-15 Koyo Seiko Co., Ltd. Brushless DC motor
JP4314816B2 (ja) * 2002-11-28 2009-08-19 ダイキン工業株式会社 ブラシレスｄｃモータおよびブラシレスｄｃモータ制御装置
DE10394041T5 (de) * 2003-01-15 2005-12-22 Mitsubishi Denki K.K. Permanentmagnetmotor
JP4449035B2 (ja) * 2004-03-10 2010-04-14 日立オートモティブシステムズ株式会社 電動車両用の永久磁石回転電機
JP4898201B2 (ja) * 2005-12-01 2012-03-14 アイチエレック株式会社 永久磁石回転機
JP4793027B2 (ja) * 2006-02-28 2011-10-12 株式会社豊田自動織機 永久磁石埋設型回転電機及びカーエアコン用モータ並びに密閉型電動圧縮機
JP5259934B2 (ja) * 2006-07-20 2013-08-07 株式会社日立産機システム 永久磁石式回転電機及びそれを用いた圧縮機
JP5212680B2 (ja) * 2006-12-12 2013-06-19 日本電産株式会社 モータ
US8405270B2 (en) * 2007-05-07 2013-03-26 Panasonic Corporation Permanent magnet buried type electric motor
US7808143B2 (en) * 2007-10-24 2010-10-05 Rechi Precision Co., Ltd. Permanent magnet motor
JP2009219331A (ja) * 2008-03-13 2009-09-24 Hitachi Ltd 永久磁石式ジェネレータとそれを用いたハイブリッド車両
JP5256147B2 (ja) 2009-08-27 2013-08-07 本田技研工業株式会社 ロータおよびモータ
JP5434415B2 (ja) * 2009-09-14 2014-03-05 株式会社豊田自動織機 永久磁石埋設型回転電機
CN102668343B (zh) * 2009-12-22 2015-05-27 丰田自动车株式会社 转子和转子的制造方法
US8541919B2 (en) * 2010-02-26 2013-09-24 General Electric Company Rotor structure for interior permanent magnet electromotive machine including laminations profiled along a segment of a bridge to define a concave and curved bridge profile
JP5413358B2 (ja) * 2010-12-07 2014-02-12 株式会社安川電機 電動機
EP2592718A2 (en) * 2011-11-08 2013-05-15 Kabushiki Kaisha Yaskawa Denki Rotor core, rotor, and rotating electric machine
JP2013126330A (ja) 2011-12-15 2013-06-24 Toyota Boshoku Corp 回転電機のコア及びその組み付け方法
JP5873924B2 (ja) * 2012-04-10 2016-03-01 本田技研工業株式会社 回転電機のロータ
JP5974599B2 (ja) * 2012-04-12 2016-08-23 株式会社デンソー 回転電機
WO2014038062A1 (ja) * 2012-09-07 2014-03-13 三菱電機株式会社 永久磁石埋込型電動機
JP6110151B2 (ja) * 2013-02-07 2017-04-05 本田技研工業株式会社 回転電機のロータ
JP6190219B2 (ja) 2013-09-05 2017-08-30 株式会社小松製作所 電動機、ロータコア、および積層鋼板
US9705366B2 (en) * 2014-04-08 2017-07-11 Mitsubishi Electric Corporation Embedded permanent magnet rotary electric machine
JP2016010176A (ja) * 2014-06-20 2016-01-18 日本電産株式会社 モータ
US10186918B2 (en) * 2014-06-27 2019-01-22 Samsung Electronics Co., Ltd. Motor and its rotor
WO2016039746A1 (en) * 2014-09-11 2016-03-17 Nissan Motor Co., Ltd. Permanent magnet synchronous motor
US9985484B2 (en) * 2015-06-09 2018-05-29 Ford Global Technologies, Llc Surface groove patterns for permanent magnet machine rotors
US10003228B2 (en) * 2015-08-25 2018-06-19 Wisconsin Alumni Research Foundation Interior permanent magnet machine with axially varying permanent magnet size
JP6806352B2 (ja) * 2015-10-13 2021-01-06 株式会社安川電機 回転電機、回転子鉄心の製造方法
JP6654902B2 (ja) * 2016-01-07 2020-02-26 Ntn株式会社 回転電動機
WO2017195263A1 (ja) * 2016-05-10 2017-11-16 三菱電機株式会社 永久磁石型モータ
US10958120B2 (en) * 2017-09-20 2021-03-23 Ford Global Technologies, Llc Electric machine rotor for harmonic flux reduction
JP2019170128A (ja) 2018-03-26 2019-10-03 東洋電機製造株式会社 モータ
US11594921B2 (en) * 2019-12-11 2023-02-28 GM Global Technology Operations LLC Electric machine with noise-reducing rotor notches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007097387A (ja) * 2005-08-31 2007-04-12 Toshiba Corp 回転電機
WO2008153171A1 (ja) * 2007-06-13 2008-12-18 Toyota Jidosha Kabushiki Kaisha 回転電機
JP2009118687A (ja) * 2007-11-08 2009-05-28 Nissan Motor Co Ltd 永久磁石式回転機
JP2020156192A (ja) 2019-03-19 2020-09-24 日鉄日新製鋼株式会社 Ｉｐｍモータのロータ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4297243A4

Also Published As

Publication number Publication date
JPWO2022176829A1 (https=) 2022-08-25
US20240235290A9 (en) 2024-07-11
US12512711B2 (en) 2025-12-30
EP4297243A4 (en) 2024-10-02
CN116897493A (zh) 2023-10-17
US20240136871A1 (en) 2024-04-25
EP4297243A1 (en) 2023-12-27

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