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WO2009011462A1 - Machine rotative - Google Patents

Machine rotative Download PDF

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Publication number
WO2009011462A1
WO2009011462A1 PCT/JP2008/063343 JP2008063343W WO2009011462A1 WO 2009011462 A1 WO2009011462 A1 WO 2009011462A1 JP 2008063343 W JP2008063343 W JP 2008063343W WO 2009011462 A1 WO2009011462 A1 WO 2009011462A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
permanent magnet
refrigerant
electrical machine
rotating electrical
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/JP2008/063343
Other languages
English (en)
Japanese (ja)
Inventor
Kazutaka Tatematsu
Eiji Yamada
Atomi Arakawa
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 WO2009011462A1 publication Critical patent/WO2009011462A1/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
    • 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
    • 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

Definitions

  • the present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine in which a permanent magnet is cooled.
  • an electric motor described in Japanese Patent Application Laid-Open No. 2003-169448 supplies the lubricating oil supplied to the bearing member to the coil end to cool the coil end.
  • the electric motor described in Japanese Patent Laid-Open No. 2006-006091 is provided with a jet outlet that jets cooling oil toward the permanent magnet of the rotor, and removes magnetic impurities by adsorbing the magnet to the permanent magnet. Cooling oil from which magnetic impurities have been removed is sprayed onto the coil. In this way, the insulation performance of the coil is prevented from being deteriorated due to damage to the insulating film on the coil surface.
  • the lubricating oil enters the housing hole that houses the permanent magnet. Then, the lubricating oil that has entered the accommodation hole oozes outward in the radial direction from the gap between the laminated steel plates constituting the rotor. Then, lubricating oil enters between the rotor and the stator, and the rotational resistance of the rotor increases.
  • the present invention has been made in view of the above-described problems, and its object is to suppress the seepage of refrigerant between the rotor and the stator while cooling the permanent magnet.
  • An object of the present invention is to provide a rotating electrical machine in which the rotational resistance of the rotor is reduced.
  • the rotating electrical machine according to the present invention is provided so as to be rotatable, and the first refrigerant passage through which the refrigerant can flow.
  • a rotating shaft in which a path is formed, and a housing hole in which a permanent magnet can be housed are formed.
  • the rotor has a permanent magnet provided in the housing hole, and a rotor fixed to the rotating shaft.
  • the rotating electrical machine includes a stator facing the rotor and having a plurality of winding phases, an end plate provided at an axial end of the rotor, and a permanent magnet formed on the end plate. And a second refrigerant passage that is in communication with the first refrigerant passage and through which the refrigerant can flow. And at least an opening edge portion of the housing hole located at the axial end of the rotor and a closing member capable of blocking the refrigerant from entering the housing hole by closing the space between the permanent magnet and the permanent magnet. .
  • the closing member is filled in the accommodation hole and extends over both axial end faces located in the axial direction of the rotor.
  • the closing member is a resin.
  • the permanent magnet can be cooled, and further, the refrigerant can be prevented from entering between the rotor and the stator, and the rotational resistance of the rotor can be reduced.
  • FIG. 1 is a cross-sectional view showing a rotating electrical machine according to an embodiment of the present invention.
  • FIG. 2 is an enlarged cross-sectional view of a part of FIG.
  • FIG. 3 is a cross-sectional view taken along the line I I I—I I I in FIG.
  • FIG. 4 is a cross-sectional view showing a first modification of the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 5 is a cross-sectional view showing a second modification of the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 1 is a cross-sectional view showing a rotating electrical machine according to an embodiment of the present invention.
  • the rotating electrical machine shown in the figure is a motor installed in a hybrid vehicle that uses an internal combustion engine such as a gasoline engine or diesel engine and a motor powered by a rechargeable secondary battery (battery) as a power source. It is.
  • rotating electrical machine 100 includes a rotor 10 and a stator 50 that is disposed on the outer periphery of rotor 10 and is disposed to face rotor 10.
  • the rotor 10 is provided on a shaft 58 extending along the central axis 10 1.
  • the shaft 58 rotates around the central axis 10 0 1 together with the rotor 10.
  • the rotor 10 has a rotor core 20 and a permanent magnet 3 1 embedded in the rotor core 20. That is, the rotating electrical machine 100 is an IPM (Interior Permanent Magnet) motor.
  • IPM Interior Permanent Magnet
  • the rotor core 20 has a cylindrical shape along the central axis 10 0 1.
  • the rotor core 20 is composed of a plurality of electromagnetic steel sheets 21 stacked in the axial direction of the central axis 10 1.
  • An end plate 29 is provided on the end surface of the rotor 10 located in the direction of the central axis 101.
  • the stator 50 includes a stator core 55 and a coil 51 wound around the stator core 55.
  • the stator core 55 is composed of a plurality of electromagnetic steel plates 52 laminated in the axial direction of the central shaft 101.
  • the rotor core 20 and the stator core 55 are not limited to magnetic steel sheets, and may be formed of, for example, a dust core.
  • the coil 51 is electrically connected to the control device 70 by a three-phase cable 60.
  • the three-phase cable 60 consists of a U-phase cable 61, a V-phase cable 62, and a W-phase cable 63.
  • Coil 5 1 is composed of a U-phase coil, a V-phase coil, and a W-phase coil.
  • U-phase cable 61, V-phase cable 6 2, and W-phase cable 6 3 are connected to the terminals of these three coils, respectively. It is connected.
  • a torque command value to be output by the rotating electrical machine 100 is sent to the control device 70 from an ECU (Electrical Control Unit) 80 mounted on the hybrid vehicle.
  • the controller 70 is used to output the torque specified by the torque command value.
  • a motor control current is generated, and the motor control current is supplied to the coin 51 via the three-phase cable 60.
  • Fig. 2 is an enlarged cross-sectional view of a part of Fig. 1, and Fig. 3 is an I II diagram of Fig. 2.
  • FIG. 1 is a sectional view taken along line I I.
  • the rotor 10 is provided with magnet groups 30A to 30H that define a plurality of magnetic poles.
  • Each of the magnet groups 30A to 30H includes two permanent magnets.
  • the magnet group 30A includes two permanent magnets 31A and 31B.
  • the permanent magnet 3 1 A and the permanent magnet 31 B are arranged in the circumferential direction of the rotor 10.
  • the magnetic poles on the outer peripheral side of the rotor 10 of the magnet groups 30A to 30H adjacent in the circumferential direction of the rotor 10 are different from each other.
  • the rotating electrical machine 100 includes a magnet cooling passage 40 that cools the permanent magnets 31 A and 31 B that constitute the magnet groups 30 A to 30 H.
  • the magnet cooling passage 40 communicates with the refrigerant passage 45 formed in the shaft 58 and the refrigerant passage 45, and the end plate
  • the refrigerant passage 45 includes an axial passage 41 that extends in the direction of the central shaft 101 and a radial passage 42 that is connected to the axial passage 41 and extends in the radial direction of the shaft 58.
  • the radial passage 42 extends toward the magnet groups 30A to 30H. Then, the refrigerant passage 43 extends from the radially inner side of the rotor 10 to the outer side so that the circumferential length of the rotor 10 increases.
  • the refrigerant passage 43 passes through the axial end surfaces 3 1 a and 3 1 b of the permanent magnets constituting the magnet groups 30A to 30H. For this reason, the permanent magnets 3 1 A and 3 1 B are cooled by the refrigerant A flowing in the refrigerant passage 43.
  • the refrigerant A flowing through the axial passage 41 enters the radial passage 42, and then the refrigerant A enters the refrigerant passage 43.
  • the permanent magnet 31 A is accommodated in a magnet accommodation hole 24 A formed in the rotor core 20.
  • the magnet accommodation hole 24 A extends in the direction of the central axis 101 and reaches the axial end faces 10 a and 10 b of the rotor 10.
  • the magnet housing hole 24 A is filled with a resin (blocking member) 26. This resin 26 fills the gap between the inner peripheral surface of the rotor core 20 that defines the magnet housing hole 24 A and the permanent magnet 31 A that is housed inside.
  • the refrigerant A can be prevented from entering 4 A, the refrigerant A can be prevented from seeping out from between the electromagnetic steel sheets of the rotor core 20 to the outer peripheral surface of the loader core 20. As a result, the refrigerant A can be prevented from entering between the rotor 10 and the stator 50, and an increase in the rotational resistance of the rotor 10 can be suppressed.
  • the resin 26 is formed over substantially the entire inner surface of the rotor core 20 that defines the magnet housing hole 24A, the inner surface of the rotor 10 that defines the magnet housing hole 24A. It is possible to prevent the refrigerant A from seeping out from the surface toward the outer surface of the rotor 10.
  • the permanent magnet 31 can be satisfactorily adhered to the rotor core 20 by the resin 26, and the permanent magnet 31 can be satisfactorily fixed to the rotor core 20. Since the axial end surfaces 3 1 a and 3 1 b of the permanent magnet 3 1 A are exposed from the resin 26, the permanent magnet 3 1 A is cooled well by the refrigerant A. Thus, by cooling the permanent magnet 3 1 A, the thermal demagnetization of the permanent magnet 3 1 A can be suppressed.
  • the permanent magnets constituting each of the magnet groups 3 OA to 3 OH are cooled and then discharged from the discharge holes 44.
  • a resin material such as epoxy, unsaturated polyester, polyamide, polypropylene, polybutylene terephthalate, polyethylene terephthalate, or polyethylene sulfide can be employed.
  • FIG. 4 is a cross-sectional view showing a first modification of the rotating electrical machine according to the embodiment of the present invention.
  • the opening edges of the magnet receiving holes 24 4 A located in the axial end faces 10 a and 10 b of the rotor 10 24 a and the opening edges of the 25 b and the permanent Resin 2 6 is provided to block between magnet 3 1 A.
  • the space between the permanent magnet 3 1 A and the openings 25 a and 25 b is closed, it is possible to prevent the refrigerant A from entering the magnet housing hole 24 A. it can.
  • resin 2 6 is magnetized. It is not limited to the case of filling the capacity hole 24 A, but even if the gap between the permanent magnet 3 1 A and the openings 2 5 a and 2 5 b is closed by the resin 2 6, the refrigerant A is magnetized.
  • FIG. 5 is a cross-sectional view showing a second modification of the rotating electrical machine according to the embodiment of the present invention.
  • plate-like closing members 2 2 a and 2 2 b located on the axial end faces 10 a and 10 b of the rotor 10 of the electromagnetic steel plate 21 are composed of the magnet housing hole 2 4 openings 2
  • the opening of the gap defined between the opening edges of 5a and 25b and the permanent magnet 31 is closed.
  • the flat plate member may be used to suppress the refrigerant A from entering the magnet housing hole 24.
  • the present invention can be applied to a rotating electrical machine, and is particularly suitable for a rotating electrical machine in which a permanent magnet is cooled.

Landscapes

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

Abstract

L'invention porte sur une machine rotative qui comprend un arbre (58) agencé en rotation et possédant un canal de fluide de refroidissement (45) où un fluide de refroidissement peut s'écouler ; un trou de contenant (24A) qui peut contenir un aimant permanent (31A) ; et un aimant permanent (31A) agencé à l'intérieur du trou de contenant (24A). La machine rotative comprend en outre : un rotor fixé à l'arbre ; et une plaque d'extrémité (29) agencée à une extrémité de direction axiale de rotor (10a) ; un canal de fluide de refroidissement (43) formé dans la plaque d'extrémité (29) et communiquant avec le canal de fluide de refroidissement (45) par l'intermédiaire d'une extrémité de direction axiale (31a) de l'aimant permanent (31A), de telle sorte qu'un fluide de refroidissement peut s'écouler ; et une résine (26) qui ferme l'espace entre les ouvertures (25a, 25b) du trou de contenant (24A) positionné aux extrémités de direction axiale du rotor (10a, 10b) et l'aimant permanent (31A), de façon à empêcher une intrusion du fluide de refroidissement dans le trou de contenant (24A).
PCT/JP2008/063343 2007-07-19 2008-07-17 Machine rotative Ceased WO2009011462A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-188449 2007-07-19
JP2007188449A JP2009027836A (ja) 2007-07-19 2007-07-19 回転電機

Publications (1)

Publication Number Publication Date
WO2009011462A1 true WO2009011462A1 (fr) 2009-01-22

Family

ID=40259780

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/063343 Ceased WO2009011462A1 (fr) 2007-07-19 2008-07-17 Machine rotative

Country Status (2)

Country Link
JP (1) JP2009027836A (fr)
WO (1) WO2009011462A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011259670A (ja) * 2010-06-11 2011-12-22 Toyota Motor Corp モータの冷却構造
CN102396133A (zh) * 2009-04-17 2012-03-28 丰田自动车株式会社 旋转电机
EP2667486A3 (fr) * 2012-05-25 2014-01-29 Deere & Company Procédé de refroidissement d'un rotor de machine électrique
EP3026794A1 (fr) * 2014-11-25 2016-06-01 Black & Decker Inc. Moteur sans balai pour un outil électrique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5417960B2 (ja) * 2009-04-16 2014-02-19 トヨタ自動車株式会社 回転電機
US9376957B2 (en) * 2012-03-23 2016-06-28 Boots Rolf Hughston Cooling a rotary engine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04112652A (ja) * 1990-08-30 1992-04-14 Aichi Emerson Electric Co Ltd 圧縮機用電動機の回転子
JPH11113202A (ja) * 1997-10-01 1999-04-23 Denyo Co Ltd 永久磁石付回転子の冷却構造
JP2005245120A (ja) * 2004-02-26 2005-09-08 Matsushita Electric Ind Co Ltd 電動機
JP2006025545A (ja) * 2004-07-08 2006-01-26 Toshiba Industrial Products Manufacturing Corp 回転電機
JP2006067777A (ja) * 2004-07-30 2006-03-09 Honda Motor Co Ltd 回転電機の冷却構造
JP2006238584A (ja) * 2005-02-24 2006-09-07 Toyota Motor Corp ロータおよびその製造方法
JP2007049787A (ja) * 2005-08-08 2007-02-22 Toyota Motor Corp 回転電機のロータおよびその製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6026502Y2 (ja) * 1979-07-24 1985-08-09 富士電機株式会社 回転電機の回転子
JPH09233767A (ja) * 1996-02-27 1997-09-05 Fuji Electric Co Ltd 回転電機の冷却装置
JP2007174755A (ja) * 2005-12-20 2007-07-05 Nissan Motor Co Ltd 回転電機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04112652A (ja) * 1990-08-30 1992-04-14 Aichi Emerson Electric Co Ltd 圧縮機用電動機の回転子
JPH11113202A (ja) * 1997-10-01 1999-04-23 Denyo Co Ltd 永久磁石付回転子の冷却構造
JP2005245120A (ja) * 2004-02-26 2005-09-08 Matsushita Electric Ind Co Ltd 電動機
JP2006025545A (ja) * 2004-07-08 2006-01-26 Toshiba Industrial Products Manufacturing Corp 回転電機
JP2006067777A (ja) * 2004-07-30 2006-03-09 Honda Motor Co Ltd 回転電機の冷却構造
JP2006238584A (ja) * 2005-02-24 2006-09-07 Toyota Motor Corp ロータおよびその製造方法
JP2007049787A (ja) * 2005-08-08 2007-02-22 Toyota Motor Corp 回転電機のロータおよびその製造方法

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102396133A (zh) * 2009-04-17 2012-03-28 丰田自动车株式会社 旋转电机
JP2011259670A (ja) * 2010-06-11 2011-12-22 Toyota Motor Corp モータの冷却構造
EP2667486A3 (fr) * 2012-05-25 2014-01-29 Deere & Company Procédé de refroidissement d'un rotor de machine électrique
US8896167B2 (en) 2012-05-25 2014-11-25 Deere & Company Electric machine rotor cooling method
EP2667486B1 (fr) 2012-05-25 2015-12-02 Deere & Company Procédé de refroidissement d'un rotor de machine électrique
EP3026794A1 (fr) * 2014-11-25 2016-06-01 Black & Decker Inc. Moteur sans balai pour un outil électrique
US10236742B2 (en) 2014-11-25 2019-03-19 Black & Decker Inc. Brushless motor for a power tool
US10523081B2 (en) 2014-11-25 2019-12-31 Black & Decker Inc. Brushless motor for a power tool

Also Published As

Publication number Publication date
JP2009027836A (ja) 2009-02-05

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