WO2014118933A1 - Moteur synchrone à aimant permanent - Google Patents

Moteur synchrone à aimant permanent Download PDF

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Publication number
WO2014118933A1
WO2014118933A1 PCT/JP2013/052173 JP2013052173W WO2014118933A1 WO 2014118933 A1 WO2014118933 A1 WO 2014118933A1 JP 2013052173 W JP2013052173 W JP 2013052173W WO 2014118933 A1 WO2014118933 A1 WO 2014118933A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
synchronous motor
holding block
divided
cores
Prior art date
Application number
PCT/JP2013/052173
Other languages
English (en)
Japanese (ja)
Inventor
遼 小松
佐藤　克己
顕吾 瀬川
尚文 尾方
Original Assignee
株式会社日立製作所
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 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to JP2014559427A priority Critical patent/JP6101716B2/ja
Priority to PCT/JP2013/052173 priority patent/WO2014118933A1/fr
Publication of WO2014118933A1 publication Critical patent/WO2014118933A1/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]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets

Definitions

  • the present invention relates to a permanent magnet type synchronous motor, and more particularly to a permanent magnet type synchronous motor suitable for an elevator hoist motor.
  • a permanent magnet type synchronous motor uses a rotor having a structure in which a plurality of permanent magnets and a plurality of cores formed of a magnetic material and assembled in a non-contact manner are alternately arranged radially (for example, Patent Document 1). .
  • an air gap is provided between the cores to increase the magnetic resistance between the cores, so that each core is magnetically independent. It is necessary to prevent short circuit. Further, since the magnetic flux short-circuited between the cores is not converted into torque, in order to increase the torque efficiently, the cores need to be magnetically independent without contacting each other.
  • the permanent magnet and core and connecting the rotating shaft In general, the entire rotor such as a component is integrated and fixed by a resin mold.
  • Resin molds have problems such as low strength and short life compared to steel materials. For this reason, in order to realize a higher torque and a longer life of the motor, a strong and long-life integration / fixing method is required.
  • the permanent magnet is fixed to the core by a method that is strong and has a long life by being hooked on a protrusion provided at the tip of the core, but the fixing method of the core itself uses a resin. Therefore, the strength and life of the entire rotor are not improved.
  • An object of the present invention is to provide a permanent magnet type synchronous motor including a rotor that is easy to assemble and has high strength and long life.
  • the present invention includes a stator and a rotor, and the rotor is configured by alternately arranging a plurality of permanent magnets and a plurality of cores in a radial pattern when viewed from the rotation center, and is formed at each of radial ends of the plurality of cores.
  • the holding block is formed of a nonmagnetic metal material and configured in an annular shape, Each of the plurality of cores is held by a holding block so that movement in the radial direction is restricted, and the holding block is fixed to a motor rotating shaft.
  • a permanent magnet type synchronous motor including a rotor that is easy to assemble and has a high strength and a long life.
  • 1 is an external view (front view) of an entire permanent magnet type synchronous motor according to an embodiment of the present invention.
  • 1 is a partially enlarged view of the appearance of a permanent magnet type synchronous motor according to an embodiment of the present invention.
  • FIG. 1 is an external view of the entire motor
  • FIG. 2 is a partially enlarged view of FIG.
  • the motor according to the present embodiment includes a rotor 20 fixed to the motor rotating shaft 15 and a stator 21 that is arranged to face the rotor 20 in the radial direction via an air gap.
  • the motor of this embodiment is an inner rotor type permanent magnet synchronous motor in which the rotor 20 is disposed inside the stator 21.
  • the stator 21 is composed of a stator core 9, a coil 10, and an insulating material 11 formed of laminated electromagnetic steel plates as shown in FIG. 2.
  • the stator core 9 has a back yoke portion 7 and a tooth portion 8.
  • the coil 10 is wound around the tooth portion 8 via an insulating material 11. In this embodiment, concentrated winding is performed by winding the coil 10 around each tooth portion 8, but distributed winding may be performed by winding the coil 10 across a plurality of teeth 8.
  • the rotor 20 mainly includes a permanent magnet 1, a core (pole piece) 2, a holding block 3, and a contact plate 4.
  • the permanent magnet 1 etc. which are stored in the inside of the contact plate 4 and are not visible from the outside are illustrated by dotted lines.
  • the plurality of permanent magnets 1 and the plurality of cores 2 are alternately arranged radially as viewed from the rotation center of the motor rotation shaft.
  • the plurality of permanent magnets 1 are arranged such that the magnetization direction, that is, the directions of the N pole and the S pole are in the motor circumferential direction and the same pole faces each core (pole piece) 2.
  • the core 2 is magnetized by the magnetic flux of the permanent magnet 1, and the magnetic pole at the tip of the core 2 viewed from the stator 21 is alternately arranged in the circumferential direction with the N pole and the S pole. Can be configured.
  • the core 2 needs to be magnetized by the permanent magnet 1 and is formed of a magnetic material.
  • FIG. 3 is an enlarged view of the core 2
  • FIG. 4 is an enlarged view of the holding block 3
  • FIG. 5 is a partially enlarged view of the motor front cross section.
  • the core 2 is provided with a protrusion 2 b protruding in the circumferential direction at the distal end portion in the radial direction (tip portion on the stator side). As shown in FIG. 5, the movement of the permanent magnet 1 outward in the radial direction is restricted by the protrusion 2b.
  • the core 2 is attached to the holding block 3 so that movement in the radial direction is restricted. The specific structure of attachment will be described later.
  • the holding block 3 is formed of a nonmagnetic metal material and has an annular shape in order to prevent the magnetic flux from short-circuiting between the cores.
  • nonmagnetic austenitic stainless steel such as SUS304 (JIS standard) is used.
  • SUS304 JIS standard
  • the nonmagnetic metal material a nonmagnetic aluminum alloy or the like can also be used.
  • the holding block 3 is divided in the circumferential direction, and each divided holding block divided in the circumferential direction is connected to an adjacent divided holding block at the end in the circumferential direction to form an annular shape. It is configured as follows.
  • the holding blocks are divided so that the number of divided holding blocks 3 is the same as that of the cores 2.
  • the divided holding blocks are connected as follows. That is, as shown in FIG. 4, each division holding block 3 has a protrusion 3 b at one circumferential end and a groove 3 c at the other circumferential end.
  • the divided holding blocks are connected in the circumferential direction by inserting the projection 3b of the divided holding block into the groove 3c of the adjacent divided holding block.
  • channel 3c is connected in the state with a moderate clearance gap.
  • the core 2 is attached to the holding block 3 so that movement in the radial direction is restricted.
  • the core 2 is attached to the holding block 3 as follows. That is, as shown in FIG. 3, a protrusion 2 a that protrudes in the circumferential direction is formed at the base of the core 2 in the radial direction.
  • a groove 3 a is formed on the outer peripheral surface of the divided holding block 3. Then, the projection 2a of the core 2 and the groove 3a of the divided holding block are firmly fitted by a method such as shrink fitting, and the core 2 and the divided holding block 3 are integrated to form the core block 5.
  • a plurality of core blocks 5 in which one core 2 is fixed to one divided holding block 3 are formed.
  • the core 2 and the divided holding block 3 are firmly integrated to form the core block 5, and then the plurality of core blocks 5 are moderately formed by the protrusions 3 b and the grooves 3 c provided on the divided holding block 3.
  • the rotor core 6 is formed by connecting in the circumferential direction with a clearance. Since the holding block 3 is formed of a non-magnetic metal material, in this embodiment, the core 2 is integrated in the circumferential direction via the holding block 3 without being magnetically short-circuited.
  • FIG. 6 is a side sectional view of the rotor after the assembly of the rotor, and FIG. 6 and 7 only show a half on one side from the axis center.
  • the backing plate 4 a and the rotor core 6 are assembled into the motor rotating shaft 15 in this order with respect to the motor rotating shaft 15, and then the permanent magnet 1 is opened in an open space formed between two adjacent core blocks.
  • the rotor 20 is inserted and finally the entire rotor 20 including the contact plate 4b is fixed to the motor rotating shaft 15 using a bolt 30 or the like.
  • a screw is provided on the motor rotating shaft 15 into which the bolt 30 is inserted, and the bolt 30 and the motor rotating shaft 15 are fastened.
  • the bolt 30 may be fastened using a nut. .
  • the axial dimensions of the permanent magnet 1 and the core 2 are the same as or smaller than the axial dimension of the holding block 3, so that the contact plate 4a and the permanent magnet 1 and An adhesive or a filler is provided between the core 2 and the core 2. These assembly operations are performed such that the axial direction is the vertical direction in order to facilitate the operations.
  • the contact plate 4 (4a, 4b) is formed of a nonmagnetic metal material in the same manner as the holding block 3 in order to prevent the magnetic flux from short-circuiting between the cores.
  • the contact plate 4 (4a, 4b) is formed so as to restrict the movement of the permanent magnet 1 in the axial direction, that is, to prevent the permanent magnet from protruding in the axial direction. It is attached.
  • the radius of curvature of the surface of the holding block 3 opposite to the groove 3 a is the radius of the motor rotating shaft 15.
  • the value is the same or less.
  • the inner diameter of the holding block is configured to be the same as or smaller than the outer dimension of the motor rotation shaft.
  • the inner diameter dimension of the contact plate 4 a is set to a value equal to or smaller than the outer diameter dimension of the motor rotating shaft 15. Therefore, the contact plate 4a and the rotor core 6 are assembled by being press-fitted into the motor rotating shaft 15 using a press device or the like.
  • the connecting portion of the core block 5 (the projection 3b and the groove 3c of the divided holding block) is rattling from a state having an appropriate clearance due to the fitting pressure with the motor rotating shaft 15.
  • the core (pole piece) 2 can be easily positioned with respect to the motor rotation shaft 15 via the holding block 3.
  • the rotor core 6 can be incorporated in a state in which the contact plate 4a is fixed by fitting with the motor rotating shaft 15.
  • the core 2 has the protrusions 2b in the circumferential direction at the front end portion on the stator side, and the permanent magnet 1 is stored in an open space formed by two adjacent core blocks 5.
  • the outer dimension of the permanent magnet 1 as viewed from the axial direction is smaller than the dimension of the open space as viewed from the axial direction.
  • the length from the outer peripheral surface of the holding block 3 to the inner peripheral side of the protrusion 2b and the circumferential length between the cores 2 are larger than the outer dimensions of the corresponding permanent magnet. Therefore, there is a gap near the outer surface of the permanent magnet 1.
  • the core 2 Since the motor torque and the attractive force with respect to the stator 21 act on the core 2, the core 2 is slightly deformed by them. When the permanent magnet 1 and the core 2 are in close contact with each other, there is a possibility that the permanent magnet 1 may be broken due to the deformation of the core 2, so that a gap is provided.
  • the axial dimensions of the permanent magnet 1 and the core 2 are the same as or smaller than the axial dimension of the holding block 3.
  • the curvature of the abutting plate 4b and the crack of the permanent magnet 1 can be avoided.
  • the core 2 is firmly fixed to the holding block 3 formed of a nonmagnetic metal material such as austenitic stainless steel to form the core block 5, and the core block 5 is connected.
  • the rotor core 6 is configured.
  • the holding block 3 and the core 2 formed of a nonmagnetic metal material are firmly fixed to form the core block 5, and the core blocks 5 are connected to each other via the holding block 3 to form the rotor core 6. Since the rotor core 6 is fitted to the motor rotating shaft 15 together with the contact plate 4a, the permanent magnet 1 and the core (pole piece) 2 are interposed via the holding block 3 by press-fitting the rotor core 6 into the motor rotating shaft 15. Positioning is performed. Therefore, this process of incorporation also serves to position the permanent magnet 1 and the core 2. That is, if this embodiment is compared with the conventional one, the assembly is completed in this embodiment at the stage of temporary positioning by a conventional positioning device or jig.
  • the holding blocks 3 are divided into the same number as the cores 2, the material utilization rate is greatly increased compared to the case of using a ring-shaped nonmagnetic metal material having a single ring shape or a small number of divisions.
  • the material can be improved.
  • the permanent magnet type synchronous motor of this embodiment can realize a high-strength and long-life rotor, it can realize a high torque and a long life of the motor, and in particular, a high torque and a long life of the motor. Is suitable for an elevator hoist motor that requires
  • the protruding portion 2a is formed on the core 2 side
  • the groove 3a is formed on the holding block side
  • the core 2 and the holding block 3 are fixed.
  • the groove portion is formed on the core 2 side.
  • a protrusion projecting in the circumferential direction may be formed on the holding block 3 side to fix the core 2 and the holding block 3.
  • the holding block is divided in the circumferential direction, but may be a single ring-shaped holding block. Further, the number of divisions may be reduced and a plurality of cores may be fixed to one holding block.
  • the contact plate 4 (4a, 4b) is formed into a donut-shaped plate, but may be divided in the circumferential direction.
  • the present invention is applied to an inner rotor type permanent magnet synchronous motor, but the present invention can also be applied to an outer rotor type permanent magnet synchronous motor.
  • the holding block is located on the outer peripheral side, and a groove for firmly fixing the core is formed on the inner peripheral side of the holding block.
  • a protrusion that fits firmly with the groove of the holding block is formed at the outer peripheral end of the core in the radial direction of the core, and the radial direction of the permanent magnet is formed on the inner peripheral side of the core in the radial direction (the tip of the stator side).
  • a protrusion that restricts inward movement is formed.
  • the outer diameter of the contact plate 4b is the same as that of the contact plate 4a.
  • the purpose of the contact plate 4b is to prevent the permanent magnet 1 from protruding in the axial direction, as shown in FIGS.
  • the outer diameter may be smaller than that of the contact plate 4a.
  • the contact plate 4a also has a function of preventing the tilt of the permanent magnet when the rotor is incorporated, so that it is necessary to make the length so that the permanent magnet does not tilt. Others are the same as in the first embodiment, and a description thereof will be omitted. In the present embodiment, the same effects as those of the first embodiment can be obtained.
  • this invention is not limited to the above-mentioned Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
  • SYMBOLS 1 Permanent magnet, 2 ... Core (pole piece), 2a, 2b ... Projection, 3 ... Holding block (divided holding block), 3a ... Groove, 3b ... Projection, 3c ... Groove, 3d ... surface (fitting surface with motor rotation shaft), 4, 4a, 4b ... backing plate, 5 ... core block, 6 ... rotor core, 7 ... back Yoke part, 8 ... teeth part, 9 ... stator core, 10 ... coil, 11 ... insulating material, 15 ... motor rotating shaft, 20 ... rotor, 21 ... stator, 30 ⁇ bolt

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

Abstract

La présente invention concerne un moteur synchrone à aimant permanent facile à assembler et équipé d'un rotor très robuste et à longue durée de vie. Le moteur synchrone à aimant permanent de la présente invention est équipé d'un stator et d'un rotor. Le rotor est conçu de sorte qu'une pluralité d'aimants permanents et qu'une pluralité de noyaux soient positionnés en alternance dans un motif radial, en vue depuis le centre de rotation. De plus, le moteur synchrone à aimant permanent : est conçu de telle sorte que le mouvement de chacun des aimants de la pluralité d'aimants permanents dans la direction radiale est régulé par des parties faisant saillie dans la direction circonférentielle, lesdites parties faisant saillie étant formées aux extrémités de la pluralités de noyaux dans la direction radiale; et est équipé de blocs de maintien formés dans un matériau métallique non-magnétique et agencés dans une forme d'anneau. La pluralité de noyaux est maintenue par les blocs de maintien de telle manière que le mouvement est régulé dans la direction radiale, et que les blocs de maintien sont fixés sur un arbre rotatif du moteur.
PCT/JP2013/052173 2013-01-31 2013-01-31 Moteur synchrone à aimant permanent WO2014118933A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2014559427A JP6101716B2 (ja) 2013-01-31 2013-01-31 永久磁石式同期モータ
PCT/JP2013/052173 WO2014118933A1 (fr) 2013-01-31 2013-01-31 Moteur synchrone à aimant permanent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/052173 WO2014118933A1 (fr) 2013-01-31 2013-01-31 Moteur synchrone à aimant permanent

Publications (1)

Publication Number Publication Date
WO2014118933A1 true WO2014118933A1 (fr) 2014-08-07

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PCT/JP2013/052173 WO2014118933A1 (fr) 2013-01-31 2013-01-31 Moteur synchrone à aimant permanent

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JP (1) JP6101716B2 (fr)
WO (1) WO2014118933A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017046386A (ja) * 2015-08-24 2017-03-02 株式会社富士通ゼネラル 永久磁石電動機

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207947660U (zh) * 2018-04-11 2018-10-09 佛山市顺德区金泰德胜电机有限公司 永磁同步无齿轮曳引机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344668A (ja) * 1992-06-08 1993-12-24 Fanuc Ltd 同期電動機のロータ
JPH089599A (ja) * 1994-06-17 1996-01-12 Yaskawa Electric Corp 永久磁石形回転子
JP2002238191A (ja) * 2001-02-08 2002-08-23 Isuzu Motors Ltd 回転機の回転子
JP2009207293A (ja) * 2008-02-28 2009-09-10 Nidec Shibaura Corp モータ回転子、およびモータ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05344668A (ja) * 1992-06-08 1993-12-24 Fanuc Ltd 同期電動機のロータ
JPH089599A (ja) * 1994-06-17 1996-01-12 Yaskawa Electric Corp 永久磁石形回転子
JP2002238191A (ja) * 2001-02-08 2002-08-23 Isuzu Motors Ltd 回転機の回転子
JP2009207293A (ja) * 2008-02-28 2009-09-10 Nidec Shibaura Corp モータ回転子、およびモータ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017046386A (ja) * 2015-08-24 2017-03-02 株式会社富士通ゼネラル 永久磁石電動機

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JP6101716B2 (ja) 2017-03-22
JPWO2014118933A1 (ja) 2017-01-26

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