WO2012124072A1 - Rotor et dispositif électrique tournant - Google Patents

Rotor et dispositif électrique tournant Download PDF

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Publication number
WO2012124072A1
WO2012124072A1 PCT/JP2011/056207 JP2011056207W WO2012124072A1 WO 2012124072 A1 WO2012124072 A1 WO 2012124072A1 JP 2011056207 W JP2011056207 W JP 2011056207W WO 2012124072 A1 WO2012124072 A1 WO 2012124072A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnet
rotor
rotor core
outer peripheral
insulating
Prior art date
Application number
PCT/JP2011/056207
Other languages
English (en)
Japanese (ja)
Inventor
服部　宏之
将由 山本
Original Assignee
トヨタ自動車株式会社
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 トヨタ自動車株式会社 filed Critical トヨタ自動車株式会社
Priority to PCT/JP2011/056207 priority Critical patent/WO2012124072A1/fr
Publication of WO2012124072A1 publication Critical patent/WO2012124072A1/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
    • 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
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets

Definitions

  • the present invention relates to a rotor used in a rotating electrical machine, and more particularly to a rotor and a rotating electrical machine in which a magnet is inserted into a rotor core.
  • Patent Document 1 Japanese Laid-Open Patent Publication No. 2006-31730 (hereinafter referred to as Patent Document 1) and Japanese Laid-Open Patent Publication No. 2002-272033 (hereinafter referred to as Patent Document 2) describe a hole provided in a rotor core and a magnet in which the hole is inserted.
  • Patent Document 2 Japanese Laid-Open Patent Publication No. 2002-272033
  • an adhesive containing non-conductive particles such as glass particles and ceramic particles is filled in the filling portion (gap) and the magnet is fixed to the rotor core.
  • the thickness may be non-uniform.
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to suppress an increase in a gap generated between a rotor core and a magnet in the rotor, and a rotor in which a decrease in performance of the rotor is suppressed. And providing a rotating electrical machine.
  • the rotor core fixed to the rotary shaft and having a hole extending in the axial direction, the magnet inserted into the hole, and the insulation provided in the gap between the rotor core and the magnet
  • An insulating spacer that covers a part of the side surface is fixed to a side surface of the magnet that is positioned on an outer peripheral side of the rotor core, and the insulating layer includes the rotor core and the magnet excluding the insulating spacer. It is provided to fill the gap.
  • the rotor core has a cubic shape
  • the insulating spacer has a substantially spherical exposed area from the surface of the magnet
  • the insulating spacer is formed of the magnet facing the outer peripheral side of the rotor. It is provided at each of the four corners including the side surfaces.
  • the insulating spacer is provided on all eight corners of the magnet.
  • the insulating spacer is provided so as to extend in the axial direction of the rotor core.
  • the insulating spacer is provided so as to cover two sides facing the outer peripheral side of the magnet.
  • the insulating spacer is provided so as to cover a side surface facing the outer peripheral side of the magnet.
  • the rotating electrical machine has a housing, and the stator, the rotor, the rotating shaft, and the bearing are provided in the housing, and the rotor is fixed to the rotating shaft.
  • a rotor core having a hole extending in the axial direction, a magnet inserted into the hole, and an insulating layer provided in a gap between the rotor core and the magnet, and positioned on the outer peripheral side of the rotor core of the magnet
  • An insulating spacer that covers a part of the side surface is fixed to the side surface, and the insulating layer is provided so as to fill a gap between the rotor core and the magnet excluding the insulating spacer.
  • the rotor and the rotating electrical machine based on the present invention, it is possible to provide the rotor and the rotating electrical machine in which the expansion of the gap generated between the rotor core and the magnet in the rotor is suppressed and the performance degradation of the rotor is suppressed.
  • FIG. 4 is an enlarged view of a region surrounded by IV in FIG. 3.
  • FIG. 1 is a cross-sectional view showing a rotating electrical machine including a rotor according to an embodiment.
  • rotating electric machine 1 that is a motor and / or a generator includes a stator 200 provided in a housing 100 having a stator housing portion, a rotor 300, a rotating shaft 400, and a bearing 500.
  • the stator 200 has a ring-shaped stator core 210 and a stator coil 220.
  • Stator core 210 is made of a plate-like magnetic material such as iron or an iron alloy.
  • a plurality of teeth portions (not shown) and a slot portion (not shown) as a recess formed between the teeth portions are formed on the inner peripheral surface of the stator core 210.
  • the slot portion is provided so as to open to the inner peripheral side of the stator core 210.
  • the stator coil 220 includes three winding phases, a U phase, a V phase, and a W phase. Stator coil 220 is wound around the tooth portion so as to fit into the slot portion. The U phase, the V phase, and the W phase are wound so as to deviate from each other on the circumference.
  • the rotor 300 includes a rotor core 310 attached to the rotating shaft 400 and a magnet 320 embedded in the rotor core 310.
  • the rotor core 310 is made of a magnetic material such as iron or an iron alloy.
  • the magnets 320 are arranged in the vicinity of the outer periphery of the rotor core 310 at substantially equal intervals.
  • the rotating shaft 400 is rotatably attached to the housing 100 via a bearing 500.
  • FIGS. 2 and 3 are a perspective view and a plan view showing the rotor 300 in the rotating electrical machine 1 shown in FIG. 4 is an enlarged view of a region surrounded by IV in FIG. 2 to 4, rotor core 310 has a hole 310h extending in the axial direction (arrow DR1 direction) of rotor core 310, and magnet 320 is inserted into the hole. A plurality of magnets 320 are provided so as to be aligned in the circumferential direction of rotor core 310 (the direction of arrow DR2).
  • the magnet 320 constitutes a magnet pair 321 to 324 formed so that the facing distance to the side surface 320p located on the outer peripheral side of the magnet 320 becomes larger toward the outer side of the rotor core 310 in the radial direction (arrow DR3 direction).
  • the width of each magnet can be reduced, and the stress generated in the rotor core can be reduced. Further, the magnetic flux density from the rotor 300 toward the stator 200 can be increased.
  • a gap S is formed between the rotor core 310 and the magnet 320.
  • the shape of the gap S is substantially constant over the entire axial direction (arrow DR1 direction) of the rotor core 310.
  • the gap S is filled with an adhesive, injection resin, or the like to form the insulating layer 340. Thereby, the magnet 320 is fixed to the rotor core 310.
  • FIG. 5 is a perspective view showing an external configuration of the magnet 320 viewed from the outer peripheral side of the rotor 300 in the present embodiment.
  • Magnet 320 in the present embodiment has a cubic shape, and insulating spacers 330 are provided at four corners including side surface 320 p facing the outer peripheral side of rotor 300.
  • the shape of the insulating spacer 330 in this embodiment is such that the exposed area from the surface of the magnet 320 is substantially spherical, and the same material as the insulating layer 340 is used for the material of the insulating spacer 330.
  • the radius of the spherical insulating spacer 330 is substantially the same as the width t1 of the gap S.
  • the insulating layer 340 is provided so as to fill a gap (S) between the rotor core 310 and the magnet 320 excluding the insulating spacer 330.
  • FIGS. 6 to 8 are first to third explanatory views for explaining a method of fixing the magnet 320 to the rotor 300.
  • FIG. 6 is first to third explanatory views for explaining a method of fixing the magnet 320 to the rotor 300.
  • insulating spacers 330 are provided in advance at the four corners including the side surface 320 p of the magnet 320 facing the outer peripheral side of the rotor 300.
  • the magnet 320 having the insulating spacer 330 is inserted into the hole 310 h provided in the rotor core 310.
  • gap (S) between rotor core 310 and magnet 320 except for insulating spacer 330 is filled in gap S from the direction of arrow A in the figure.
  • an adhesive or an injection resin is filled.
  • the distance (t1) between the outer peripheral side surface 320p of the magnet 320 and the rotor core 310 is kept constant, and the side surface 320p of the magnet 320 and the rotor core 310 are separated from each other. There is no contact.
  • the insulating layer 340 is formed in the gap S while the distance t1 between the outer peripheral surface of the magnet 320 and the rotor core 310 is kept constant.
  • a method of fixing the magnet 320 to the rotor core 310 in the background art will be described with reference to FIG.
  • the insulator 330 p is provided on the entire outer peripheral surface of the magnet 320. Therefore, when the gap 320 is filled with an adhesive or the like after the insertion of the magnet 320 into the hole 310h is completed, the distance of the gap S is [t1 + t2]. For this reason, the increase in the gap S, that is, the increase in the gap causes a decrease in the performance of the rotor.
  • the distance of the gap S is [t1]
  • the expansion of the gap S that occurs between the rotor core 310 and the magnet 320 in the rotor 300 is suppressed, and the performance degradation of the rotor 300 is suppressed. It is possible to provide the rotor 300 and the rotating electrical machine 1 that have been provided.
  • the distance between the magnet 320 and the rotor core 310 is reliably set to a constant value in order to suppress the generation of eddy currents on the outer peripheral surface of the magnet 320 where eddy currents are likely to be generated. Therefore, although the configuration in which the insulating spacers 330 are provided at the four corners facing the outer periphery of the rotor 300 of the magnet 320 has been described, the configuration is not limited to this configuration. As shown in FIG. 10, it is also possible to employ a configuration in which insulating spacers 330 are provided at all eight corners of a magnet 320 that is a cube.
  • insulating spacers 330 a may be provided so as to cover two sides extending in the axial direction of the rotor core 310 facing the outer peripheral side of the magnet 320.
  • insulating spacers 330 a may be provided so as to cover all four sides extending in the axial direction of the rotor core 310.
  • the position where the spacer is provided is not limited to only the corners and sides of the magnet 320.
  • An insulating spacer is fixed so as to cover a part of the side surface 320p located on the outer peripheral side of the rotor core 310 of the magnet 320, and the insulating layer 340 fills the gap (S) between the rotor core 310 and the magnet 320 excluding the insulating spacer. As long as it is provided.
  • an insulating spacer 330 b extending in the axial direction of the rotor core 310 may be provided on the side surface 320 p of the magnet 320. Further, as a modification of the insulating spacer 330a in FIG. 12 and the insulating spacer 330b in FIG. 13, the intermediate region is omitted without being provided over the entire axial length of the rotor core 310, as shown in FIG. It is also possible to employ an insulating spacer 330d shown in FIG.
  • the expansion of the gap S generated between the rotor core 310 and the magnet 320 in the rotor 300 is suppressed, and the performance degradation of the rotor 300 is suppressed.
  • the provided rotor 300 and rotating electric machine 1 can be provided.
  • the outer circumference of the magnet 320 is increased in the radially outward direction (arrow DR3 direction) of the rotor core 310.
  • Magnet pairs 321 to 324 formed so as to increase the facing distance between the side surfaces are employed and the magnet 320 is arranged in a substantially V shape, but the present invention is not limited to this arrangement.
  • the present invention can also be applied to a configuration in which the longitudinal direction of the magnet 320 is arranged so as to be orthogonal to the radial direction of the rotor core 310, and similar operational effects can be obtained.
  • 1 rotating electrical machine 100 housing, 200 stator, 210 stator core, 220 stator coil, 300 rotor, 310 rotor core, 310h hole, 320 magnet, 320p side, 321-324 magnet pair, 330, 330a, 330b, 330c, 330d insulating spacer 330p insulator, 340 insulating layer, 400 rotating shaft, 500 bearing.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

L'invention porte sur un rotor. Ce rotor destiné à être utilisé dans un dispositif électrique tournant comprend un noyau de rotor (310) fixé à un arbre de rotation (400) et présentant un trou (310h) qui s'étend dans la direction axiale (DR1), un aimant (320) logé dans le trou (310h) et une couche isolante (340) placée dans l'espace (S) entre le noyau de rotor (310) et l'aimant (320). Sur une surface latérale (320p) de l'aimant (320) qui est située sur le côté circonférentiel extérieur du noyau de rotor (310), est fixé un intercalaire isolant (330) qui recouvre une partie de ladite surface latérale (320p), et la couche isolante (340) est disposée de manière à combler l'espace (S) entre le noyau de rotor (310) et l'aimant (320) à l'exception de l'intercalaire isolant (330).
PCT/JP2011/056207 2011-03-16 2011-03-16 Rotor et dispositif électrique tournant WO2012124072A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/056207 WO2012124072A1 (fr) 2011-03-16 2011-03-16 Rotor et dispositif électrique tournant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/056207 WO2012124072A1 (fr) 2011-03-16 2011-03-16 Rotor et dispositif électrique tournant

Publications (1)

Publication Number Publication Date
WO2012124072A1 true WO2012124072A1 (fr) 2012-09-20

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WO (1) WO2012124072A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014079056A (ja) * 2012-10-09 2014-05-01 Apic Yamada Corp モータコアの樹脂モールド方法
JP2014222964A (ja) * 2013-05-13 2014-11-27 株式会社三井ハイテック 回転子鉄心の製造方法及び回転子鉄心
FR3010592A3 (fr) * 2013-09-10 2015-03-13 Renault Sa Procede de montage d'aimant a l'interieur d'un bloc cylindre de rotor de machine electrique
JP2017011998A (ja) * 2016-10-20 2017-01-12 アピックヤマダ株式会社 マグネットの製造方法及びモータコアの樹脂モールド方法
EP3468005A1 (fr) * 2017-10-05 2019-04-10 Toyota Jidosha Kabushiki Kaisha Rotor de machine électrique tournante et procédé de fabrication dudit rotor
WO2021064179A1 (fr) * 2019-10-04 2021-04-08 Schlaeger Kunststofftechnik Gmbh Procédé de fabrication d'un composant muni d'au moins un élément structural, en particulier d'un élément fonctionnel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007159223A (ja) * 2005-12-02 2007-06-21 Toyota Motor Corp ロータ、回転電機およびロータの製造方法
JP2009038906A (ja) * 2007-08-02 2009-02-19 Jtekt Corp Ｉｐｍモータ及び電動パワーステアリング装置
JP2009171785A (ja) * 2008-01-18 2009-07-30 Toyota Motor Corp 回転電機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007159223A (ja) * 2005-12-02 2007-06-21 Toyota Motor Corp ロータ、回転電機およびロータの製造方法
JP2009038906A (ja) * 2007-08-02 2009-02-19 Jtekt Corp Ｉｐｍモータ及び電動パワーステアリング装置
JP2009171785A (ja) * 2008-01-18 2009-07-30 Toyota Motor Corp 回転電機

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014079056A (ja) * 2012-10-09 2014-05-01 Apic Yamada Corp モータコアの樹脂モールド方法
JP2014222964A (ja) * 2013-05-13 2014-11-27 株式会社三井ハイテック 回転子鉄心の製造方法及び回転子鉄心
FR3010592A3 (fr) * 2013-09-10 2015-03-13 Renault Sa Procede de montage d'aimant a l'interieur d'un bloc cylindre de rotor de machine electrique
JP2017011998A (ja) * 2016-10-20 2017-01-12 アピックヤマダ株式会社 マグネットの製造方法及びモータコアの樹脂モールド方法
EP3468005A1 (fr) * 2017-10-05 2019-04-10 Toyota Jidosha Kabushiki Kaisha Rotor de machine électrique tournante et procédé de fabrication dudit rotor
RU2700171C1 (ru) * 2017-10-05 2019-09-13 Тойота Дзидося Кабусики Кайся Ротор вращающейся электрической машины и способ его изготовления
WO2021064179A1 (fr) * 2019-10-04 2021-04-08 Schlaeger Kunststofftechnik Gmbh Procédé de fabrication d'un composant muni d'au moins un élément structural, en particulier d'un élément fonctionnel

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