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WO2008149865A1 - Machine rotative - Google Patents

Machine rotative Download PDF

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Publication number
WO2008149865A1
WO2008149865A1 PCT/JP2008/060235 JP2008060235W WO2008149865A1 WO 2008149865 A1 WO2008149865 A1 WO 2008149865A1 JP 2008060235 W JP2008060235 W JP 2008060235W WO 2008149865 A1 WO2008149865 A1 WO 2008149865A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
core
slot
distance
electrical machine
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/JP2008/060235
Other languages
English (en)
Japanese (ja)
Inventor
Shinya Sano
Eiji Yamada
Kazutaka Tatematsu
Kenji Hiramoto
Kosuke Aiki
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
Original Assignee
Toyota Motor 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 filed Critical Toyota Motor Corp
Publication of WO2008149865A1 publication Critical patent/WO2008149865A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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 rotating electrical machine in which a stator and a rotor are arranged opposite to each other in a radial direction perpendicular to the rotation axis direction of the rotor.
  • Japanese Patent Application Laid-Open No. 2 065 1 6 8 1 2 A related technology of this type of rotating electrical machine is disclosed in Japanese Patent Application Laid-Open No. 2 065 1 6 8 1 2 8.
  • a rotor rotor core
  • Permanent magnets are embedded in the outer periphery of each core member so as to face the stator.
  • an eddy current that flows in an in-plane direction is formed by configuring a rotor core with a plurality of core members divided in the circumferential direction. Since the cross-sectional area (area in the in-plane direction) of the part where the eddy current circulates is reduced by dividing the path, the eddy current in the in-plane direction can be reduced.
  • a rotor in which a magnet is disposed in a slot formed in the rotor core when the rotor core is divided into a plurality of core members, the stator and the rotor are secured in order to ensure the strength of the rotor.
  • the rotor core is constituted by a plurality of core members divided in the circumferential direction
  • eddy current is generated in-plane between the coupling surface where the core members adjacent in the circumferential direction are combined and the slot (magnet). Flow in the direction.
  • An object of the present invention is to provide a rotating electrical machine capable of efficiently reducing a loss that occurs when an eddy current flows in a rotor core in an in-plane direction perpendicular to the rotation axis direction.
  • an object of the present invention is to provide a rotating electrical machine that can efficiently increase the torque acting on the rotor while ensuring the strength of the rotor.
  • a rotating electrical machine is a rotating electrical machine in which a stator and a rotor are opposed to each other in a radial direction perpendicular to the rotating shaft direction of the rotor, and the rotor is divided into a plurality of circumferentially divided pieces.
  • Each of the core split pieces includes a slot, and a magnet is disposed in the slot.
  • the core split pieces include the rotor core formed by connecting the core split pieces to each other. The gist is that the distance between the slot and the connecting surface where the core split pieces adjacent in the direction are combined is shorter than the distance between the surface facing the stator and the slot.
  • a distance from a slot positioned forward in the rotor rotation direction from the coupling surface is shorter than a distance from a slot positioned rearward in the rotor rotation direction from the coupling surface. Is preferred.
  • the rotating electrical machine according to the present invention is a rotating electrical machine in which a stator and a rotor are opposed to each other in a radial direction perpendicular to the rotational axis direction of the rotor, and the rotor is divided in the circumferential direction.
  • Each of the core split pieces is provided with a slot, and a magnet is disposed in the slot, and the circumferential direction
  • the distance from the slot located forward of the rotor rotation direction from the joint surface is the same as the slot located behind the joint surface in the rotor rotational direction.
  • the gist is that it is shorter than the distance.
  • each iron core split piece is formed with a slot in a substantially V shape, and a magnet is disposed in a slot formed in a substantially V shape.
  • FIG. 1 is a diagram showing a schematic configuration of a rotating electrical machine according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing a schematic configuration of the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 3 is a diagram showing a schematic configuration of the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 4 is a diagram for explaining eddy currents flowing in the rotor core in an in-plane direction perpendicular to the rotation axis direction of the rotor in a configuration in which the rotor core is not divided in the circumferential direction.
  • FIG. 5 is a diagram for explaining an eddy current flowing in the in-plane direction perpendicular to the rotation axis direction of the rotor in the rotor core in the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 6 is a diagram for explaining the magnetic flux that leaks through the magnetic bridge between the outer peripheral surface of the core split piece and the slot.
  • FIG. 7 is a diagram illustrating the flow of magnetic flux of the permanent magnet in the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 8 is a diagram for explaining eddy currents flowing in the rotor core in an in-plane direction perpendicular to the rotation axis direction of the rotor in a configuration in which the rotor core is not divided in the circumferential direction.
  • FIG. 9 is a diagram showing another schematic configuration of the rotating electrical machine according to the embodiment of the present invention.
  • FIGS. 1 to 3 are diagrams showing a schematic configuration of a rotating electrical machine according to an embodiment of the present invention.
  • Fig. 1 shows the outline of the internal structure of the stator 1 2 and the rotor 14 viewed from the direction orthogonal to the axis 2 2
  • Fig. 2 shows the stator 1 2 viewed from the direction parallel to the axis 2 2
  • Inside of rotor 1 4 3 shows a part of the configuration
  • FIG. 3 shows a part of the internal configuration of the rotor 14 viewed from the direction parallel to the axis 2 2.
  • the configuration of the parts not shown in FIGS. 2 and 3 is the same as that shown.
  • the rotating electrical machine includes a stator 12 fixed to a casing (not shown), a rotor 14 disposed radially inside the stator 12 2 and rotatable relative to the stator 12; Is a radial type rotary electric machine.
  • Stator 12 includes a stator core 26 and a plurality of stator coils 28 disposed on stator core 26.
  • a plurality of teeth 30 projecting radially inward (rotor 14 side) are arranged at intervals along the circumferential direction of the stator 12.
  • the coil 28 is disposed on these teeth 30.
  • Rotor 14 includes a rotor core 16, and a plurality of permanent magnets 18 disposed on the outer periphery of rotor core 16.
  • the plurality of permanent magnets 18 are arranged at intervals along the circumferential direction (rotation direction) of the rotor 14.
  • the rotor 14 is provided with an axis 22 along the rotation center axis, and the axis 22 is rotatably supported by the casing.
  • the inner periphery of the stator core 26 (tooth tip 30 a) and the permanent magnet 18 (the outer periphery of the rotor core 16) are in the direction of the rotation axis of the rotor 14 (axis 2 2 in the radial direction perpendicular to the longitudinal direction (hereinafter simply referred to as the rotational axis direction).
  • the rotor core 16 is divided into a plurality of core split pieces 36 on the split surface 40.
  • the dividing surface 40 includes a plane that is substantially parallel to the radial direction of the rotor 14 and substantially orthogonal to the circumferential direction of the rotor 14, and the rotor core 1 6 force with respect to the circumferential direction of the rotor 14. It is composed of a plurality of divided iron core divided pieces 36.
  • Each core segment piece 36 can be formed by laminating, for example, thin silicon steel plates (electromagnetic steel plates) in the rotation axis direction.
  • the rotor core 1 6 is configured by arranging a plurality of core split pieces 3 6 in an annular shape and connecting them together. For example, as shown in FIGS. 2 and 3, as shown in FIGS. 2 and 3, the core split pieces 3 6 are connected to each other on the connecting surface where the core split pieces 3 6 are joined. 3 When joining 6 to 6, it can be fixed by applying pressure in the direction in which both swallow. However, other coupling methods such as screwing or gluing can be used. It should be noted that the joint surface where the core split pieces 36 are joined together when the plurality of core split pieces 36 are joined coincides with the aforementioned split face 40. Slots 42 are formed on the outer periphery of each core segment piece 36, and permanent magnets 18 are inserted into the slots 42.
  • the rotor core 16 is also arranged on the surface of the permanent magnet 18 (outside of the permanent magnet 18 in the radial direction of the rotor 14), and the permanent magnet 18 is attached to the rotor core 16. It is buried inside.
  • the coupling surface (divided surface 40) and the core segment segments 36 adjacent to each other in the circumferential direction of the rotor 14 are combined.
  • the distance b between the end of the slot 4 2 is set to be shorter than the distance a between the outer peripheral surface 3 6 a opposite to the stator 12 and the end of the slot 4 2 (b ⁇ a ).
  • slot 4 2 is formed in a substantially V shape in each of the iron core split pieces 3 6 and is disposed in the slot 4 2 of a substantially magnet-shaped 18 force.
  • magnets 18 are arranged in a substantially V shape for each pole.
  • the arrangement of the permanent magnets 18 is not limited to this example. It is also possible to form a plurality of magnetic poles on each core split piece 36.
  • stator 12 currents are sequentially passed through the stator coils 28, whereby the teeth 30 are sequentially magnetized to form a rotating magnetic field. Then, the magnetic field flux of the permanent magnet 18 of the rotor 14 interacts with this rotating magnetic field, and attraction and repulsion occurs, and the rotor 14 rotates to obtain magnet torque. Further, the rotor core 16 is disposed on the surface of the substantially V-shaped permanent magnet 18, and between the permanent magnets 18 adjacent in the circumferential direction (between the slots 4 2). The portion of the rotor core 16 functions as a salient pole and is attracted to the rotating magnetic field of the stator 12, so that reluctance torque can be obtained in addition to the magnet torque.
  • the rotor core 16 for example, magnetic steel sheets are laminated in the direction of the rotation axis, thereby increasing the magnetic resistance in the direction of the rotation axis and making it difficult for the magnetic flux to flow in the direction of the rotation axis.
  • the magnetic flux flowing through the rotor core 16 in the in-plane direction perpendicular to the rotation axis direction becomes saturated, the magnetic flux also flows out in the rotation axis direction.
  • the torque of the rotor 14 is large, the magnetic flux flowing in the rotor core 16 is likely to be saturated, and the magnetic flux easily flows in the direction of the rotation axis.
  • the in-plane direction vortex is low because the specific resistance (electrical resistance) in the in-plane direction perpendicular to the rotation axis direction is low.
  • Current 3 4 tends to increase.
  • the rotor core 16 is configured by connecting a plurality of core segment pieces 36 divided in the circumferential direction by the dividing surface 40 to each other.
  • the path of the eddy current 3 4 flowing in the in-plane direction through the rotor core 16 is divided by the dividing surface 40, and the cross-sectional area (area in the in-plane direction) of the portion where the eddy current 3 4 circulates is reduced. The Therefore, the eddy current 3 4 flowing in the in-plane direction through the rotor core 16 can be reduced, and the loss due to the in-plane eddy current 3 4 can be reduced.
  • the rotor core 16 is divided into a plurality of core split pieces 36.
  • the distance a between the outer peripheral surface 3 6 a and the slot 4 2 is increased, for example, as shown in FIG.
  • the distance b between the split surface 40 and the slot 42 is shorter than the distance a between the outer peripheral surface 36a and the slot 42.
  • the magnetic flux in the rotation axis direction is The distribution of the eddy current 3 4 in the in-plane direction perpendicular to the rotation axis direction with respect to the center 16a of the salient pole part is due to the fact that the distribution is biased forward in the rotor rotation direction with respect to the center 16a of the salient pole part. It is generated biased forward in the rotor rotation direction. Therefore, in this embodiment, for example, as shown in FIG.
  • each divided surface (coupling surface) 40 is shifted (offset) forward in the rotor rotation direction with respect to the center 16 a of the salient pole portion. It can also be formed. That is, in each divided surface 40, as shown in FIG. 9, the distance b 1 to the slot 4 2a (permanent magnet 18a) located in front of the rotor rotation direction from the divided surface 40 is divided. It can also be set shorter than the distance b 2 with the slot 4 2 b (permanent magnet 18 b) located behind the surface 40 in the rotor rotation direction (bl ⁇ b 2). In FIG. 9, one divided plane 40 is shown, but the other divided plane 40 has the same configuration.
  • the dividing surface 40 is made to be a salient pole so as to divide the center of the magnetic flux distribution in the rotation axis direction biased forward in the rotor rotation direction with respect to the center 16a of the salient pole portion.
  • the path of the eddy current 3 4 flowing in the in-plane direction between the slots 4 2 a and 4 2 b is efficiently divided by the dividing surface 40 by shifting it forward of the rotor rotation direction with respect to the center 16 a. can do. Therefore, the eddy current 34 flowing in the in-plane direction between the dividing surface 40 and the slots 4 2 a and 4 2 b can be efficiently reduced. As a result, the loss that occurs when eddy current 34 flows in the in-plane direction can be more efficiently reduced.
  • a compacted powder obtained by pressing and compacting a powder coated with a film that does not conduct electricity on the surface of a ferromagnetic fine particle such as iron. It can also be formed from a magnetic core material.

Landscapes

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

Abstract

L'invention concerne un rotor d'une machine rotative qui comprend un noyau de rotor formé par connexion d'une pluralité de pièces divisées de noyau de fer divisées dans la direction périphérique. Le noyau de rotor est agencé pour s'opposer à un stator dans la direction radiale croisant perpendiculairement la direction de l'axe de rotation. Chacune des pièces divisées de noyau de fer comporte une fente dans laquelle un aimant est placé. Dans chacune des pièces divisées de noyau de fer, la distance entre la fente et le plan de connexion dans lequel les pièces divisées de noyau de fer adjacentes à la direction périphérique sont connectées est plus courte que la distance entre la fente et la surface opposée du stator.
PCT/JP2008/060235 2007-05-31 2008-05-28 Machine rotative Ceased WO2008149865A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007144452A JP4719183B2 (ja) 2007-05-31 2007-05-31 回転電機
JP2007-144452 2007-05-31

Publications (1)

Publication Number Publication Date
WO2008149865A1 true WO2008149865A1 (fr) 2008-12-11

Family

ID=40093681

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/060235 Ceased WO2008149865A1 (fr) 2007-05-31 2008-05-28 Machine rotative

Country Status (2)

Country Link
JP (1) JP4719183B2 (fr)
WO (1) WO2008149865A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018099541A1 (fr) * 2016-11-29 2018-06-07 L-3 Communications Magnet-Motor Gmbh Rotor d'une machine électrique excitée par des aimants permanents

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5493710B2 (ja) * 2009-10-29 2014-05-14 トヨタ紡織株式会社 積層鉄心、その射出成形方法及び射出成形装置
JP5609844B2 (ja) 2011-05-11 2014-10-22 株式会社デンソー 電動機
EP2940841B1 (fr) * 2012-12-28 2018-04-11 IHI Corporation Machine tournante à réluctance commutée à double stator
WO2014109218A1 (fr) 2013-01-10 2014-07-17 株式会社Ihi Machine tournante à réluctance commutée à double stator
JP2017034774A (ja) * 2015-07-29 2017-02-09 日産自動車株式会社 ローターの製造方法
CN106169823B (zh) * 2016-07-08 2018-10-30 宁波欣达电梯配件厂 一种永磁电机转子冲片拼装单元及拼装转子
CN109378914B (zh) * 2018-10-23 2021-11-05 奇瑞新能源汽车股份有限公司 电动汽车用驱动电机转子铁芯的制作方法
WO2022107273A1 (fr) * 2020-11-19 2022-05-27 三菱電機株式会社 Rotor, moteur électrique, ventilateur, dispositif de climatisation et procédé de fabrication de rotor
JP7673800B2 (ja) * 2021-06-11 2025-05-09 日本電信電話株式会社 光導波路デバイスの実装構造
DE102021210756A1 (de) 2021-09-27 2023-03-30 Siemens Energy Global GmbH & Co. KG Rotor für eine elektrische rotierende Maschine, elektrische rotierende Maschine, Gondelantrieb und Wasserfahrzeug

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007409A1 (fr) * 1990-10-19 1992-04-30 Seiko Epson Corporation Rotor de moteur sans balais et procede de production
JPH08336246A (ja) * 1995-06-07 1996-12-17 Matsushita Electric Ind Co Ltd 永久磁石付ロータ
JPH11275783A (ja) * 1998-03-20 1999-10-08 Matsushita Electric Ind Co Ltd 永久磁石埋め込みロータ
JP2004129448A (ja) * 2002-10-07 2004-04-22 Hitachi Ltd 永久磁石式回転電機
JP2004320952A (ja) * 2003-04-18 2004-11-11 Hitachi Industrial Equipment Systems Co Ltd 永久磁石式回転電機
JP2005168128A (ja) * 2003-12-01 2005-06-23 Honda Motor Co Ltd 回転電機用ロータ
JP2005312153A (ja) * 2004-04-20 2005-11-04 Honda Motor Co Ltd 永久磁石式回転子とその製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002101586A (ja) * 2000-09-25 2002-04-05 Toshiba Kyaria Kk 電動機の回転子
JP4680442B2 (ja) * 2001-08-10 2011-05-11 ヤマハ発動機株式会社 モータの回転子
JP2005210828A (ja) * 2004-01-22 2005-08-04 Toyota Motor Corp 回転電機のロータおよび回転電機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992007409A1 (fr) * 1990-10-19 1992-04-30 Seiko Epson Corporation Rotor de moteur sans balais et procede de production
JPH08336246A (ja) * 1995-06-07 1996-12-17 Matsushita Electric Ind Co Ltd 永久磁石付ロータ
JPH11275783A (ja) * 1998-03-20 1999-10-08 Matsushita Electric Ind Co Ltd 永久磁石埋め込みロータ
JP2004129448A (ja) * 2002-10-07 2004-04-22 Hitachi Ltd 永久磁石式回転電機
JP2004320952A (ja) * 2003-04-18 2004-11-11 Hitachi Industrial Equipment Systems Co Ltd 永久磁石式回転電機
JP2005168128A (ja) * 2003-12-01 2005-06-23 Honda Motor Co Ltd 回転電機用ロータ
JP2005312153A (ja) * 2004-04-20 2005-11-04 Honda Motor Co Ltd 永久磁石式回転子とその製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018099541A1 (fr) * 2016-11-29 2018-06-07 L-3 Communications Magnet-Motor Gmbh Rotor d'une machine électrique excitée par des aimants permanents

Also Published As

Publication number Publication date
JP4719183B2 (ja) 2011-07-06
JP2008301610A (ja) 2008-12-11

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