WO2023190855A1 - Rotor et procédé de fabrication de rotor - Google Patents

Rotor et procédé de fabrication de rotor Download PDF

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Publication number
WO2023190855A1
WO2023190855A1 PCT/JP2023/013151 JP2023013151W WO2023190855A1 WO 2023190855 A1 WO2023190855 A1 WO 2023190855A1 JP 2023013151 W JP2023013151 W JP 2023013151W WO 2023190855 A1 WO2023190855 A1 WO 2023190855A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
prevention member
scattering prevention
permanent magnet
ribbon
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/JP2023/013151
Other languages
English (en)
Japanese (ja)
Inventor
訓明 松本
崇 平林
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.)
Denso Corp
Original Assignee
Denso 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 Denso Corp filed Critical Denso Corp
Priority to DE112023001727.1T priority Critical patent/DE112023001727T5/de
Publication of WO2023190855A1 publication Critical patent/WO2023190855A1/fr
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
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • H02K15/035—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets on the rotor

Definitions

  • the present disclosure relates to a rotor having permanent magnets and a method for manufacturing the rotor.
  • a rotor of a motor in which a plurality of permanent magnets are arranged on the outer surface of a rotor base as a magnetic pole part.
  • the permanent magnet receives centrifugal force toward the outer diameter, which causes it to float toward the outer diameter and scatter.
  • some permanent magnets are provided with a scattering prevention member that covers part or all of the outer surface of the permanent magnet.
  • a ribbon-like material is used and is attached in a manner that it goes around the rotor (see, for example, Patent Document 1).
  • the ribbon-shaped material is made of glass fiber reinforced resin.
  • the ribbon-like material is wound with such tension that wrinkles do not occur in the ribbon-like material and no displacement occurs during heating or after curing.
  • the rotor includes a rotor base, a plurality of permanent magnets arranged in a circumferential direction on an outer surface of the rotor base, and a rotor that orbits the rotor along the outer surface of the plurality of permanent magnets.
  • a rotor comprising a scattering prevention member attached in a manner such that the scattering prevention member exerts a tightening force toward the inner diameter side of the rotor that is greater than the centrifugal force of the permanent magnet that occurs when the rotor is used at maximum rotation. have.
  • the permanent magnet scattering prevention member in the rotor has a tightening force toward the inner diameter side of the rotor that is greater than the centrifugal force of the permanent magnet that occurs when the rotor is at its maximum rotation. That is, in the normal use range of the rotor, the clamping force of the scattering prevention member always exceeds the centrifugal force of the permanent magnet. Therefore, in addition to the function of preventing the scattering of the permanent magnet by the scattering prevention member, it is also possible to sufficiently suppress deformation of the scattering prevention member toward the outer diameter side.
  • a method for manufacturing a rotor includes: a rotor base; a plurality of permanent magnets arranged in a circumferential direction on an outer surface of the rotor base; A method for manufacturing a rotor, comprising: a scattering prevention member attached in a manner that the rotor rotates around the rotor, the scattering prevention member including a CFRP material forming a ribbon-like material, and applying high tension to the ribbon-like material. winding the ribbon-like material around the rotor in the attached state; and maintaining a high tension state of the ribbon-like material during heat curing treatment, so that the scattering prevention member is attached to the rotor. It has a tightening force toward the inner diameter side of the rotor that is greater than the centrifugal force of the permanent magnet that occurs at the maximum rotation in use.
  • the permanent magnet scattering prevention member in the rotor has a tightening force toward the inner diameter side of the rotor that is greater than the centrifugal force of the permanent magnet that occurs when the rotor is at its maximum operating rotation.
  • the function of preventing the scattering of the permanent magnet by the scattering preventing member it is also possible to sufficiently suppress deformation of the scattering preventing member toward the outer diameter side.
  • by applying high tension to a ribbon-shaped CFRP material, winding it, and heat-hardening it it is possible to easily create a scattering prevention member whose clamping force is superior to the centrifugal force of a permanent magnet. It is.
  • FIG. 1 is a configuration diagram of a motor having a rotor in one embodiment
  • FIG. 2 is a perspective view of the rotor in the same embodiment
  • FIG. 3 is an explanatory diagram showing the manufacturing process of the rotor in the same embodiment
  • FIG. 4 is a partially enlarged view of the rotor in the same embodiment.
  • the motor 10 of this embodiment includes a stator 11 and a rotor 12.
  • the stator 11 has a substantially annular shape.
  • the stator 11 has, for example, 24 coil magnetic pole portions (not shown) in the circumferential direction.
  • a rotor 12 is rotatably arranged inside the stator 11.
  • the stator 11 generates a rotating magnetic field for rotationally driving the rotor 12 based on energization of its own coil magnetic pole portion.
  • the motor 10 of this embodiment is intended to be applied to a high-speed rotation motor with a maximum rotation speed of 12,000 [rpm] or more, as an example.
  • the rotor 12 of this embodiment includes a rotor base 21, a permanent magnet 22, and a scattering prevention member 23.
  • the rotor base 21 has a generally cylindrical shape as a whole.
  • the rotor base 21 has a hollow structure in consideration of weight reduction and the like.
  • One axial end side portion of the rotor base 21 is integrally configured as an output shaft portion 21x.
  • twenty permanent magnets 22 are arranged in the circumferential direction on the outer surface 21a of the rotor base 21 at the other end in the axial direction. That is, the rotor 12 has 20 magnetic pole parts in the circumferential direction.
  • the permanent magnet 22 has a substantially rectangular shape.
  • the inner surface 22a of the permanent magnet 22 on the inner diameter side of the rotor 12 is in contact with the outer surface 21a of the rotor base 21.
  • the inner surface 22a and the outer surface 21a each form a circumferential surface or a flat surface.
  • the outer surface 22b of the permanent magnet 22, which is on the outer diameter side of the rotor 12, constitutes a uniform outer circumferential surface of the rotor 12 by all the permanent magnets 22 in the circumferential direction.
  • Side end surfaces 22c on both sides of the permanent magnet 22 in the circumferential direction of the rotor 12 are in contact with side end surfaces 22c of adjacent permanent magnets 22.
  • the permanent magnet 22 is composed of, for example, a Halbach array magnet. Specifically, the permanent magnet 22 is divided into three regions with different magnetization modes in the circumferential direction. Both sides of the permanent magnet 22 in the circumferential direction are magnetized in such a manner that magnetic flux is generated in the radial direction. The circumferential central portion of the permanent magnet 22 is magnetized such that magnetic flux is directed in a direction perpendicular to the radial direction, that is, in the circumferential direction, and magnetic flux is directed toward both sides of the permanent magnet.
  • the anti-scattering member 23 is attached so as to orbit the rotor 12 along the outer surface 22b of the plurality of permanent magnets 22 in the circumferential direction.
  • the scattering prevention member 23 is provided in a cylindrical shape so as to completely cover the permanent magnet 22.
  • a carbon fiber reinforced resin material (referred to as CFRP material) is used for the scattering prevention member 23 of this embodiment.
  • the scattering prevention member 23 made of CFRP material is a composite material including a resin base material 23a such as a thermosetting resin and carbon fibers 23b.
  • a CFRP material having a volume content of carbon fibers 23b of 60 to 70% is used.
  • the scattering prevention member 23 is made of a ribbon-shaped material 23x in this embodiment.
  • the width of the ribbon-like material 23x is set to be smaller than the axial length of the permanent magnet 22.
  • the ribbon-like material 23x is wound several times around the permanent magnet 22 of the rotor 12 so that the permanent magnet 22 is not exposed. Further, in this case, the ribbon-like material 23x is wound in one layer or in multiple layers.
  • the heating temperature for CFRP material is generally 160 to 180 [°C], but in this embodiment, the heating temperature is set to a temperature range of 130 to 140 [°C], where the influence of demagnetization of the permanent magnet 22 is small. There is. In this way, a cylindrical scattering prevention member 23 in which the resin base materials 23a are integrally fused and hardened is produced on the outer diameter side of the permanent magnet 22.
  • the permanent magnets 22 are firmly fixed to the rotor base 21 in a state in which the permanent magnets 22 are in close contact with the outer surface 21a of the rotor base 21, and the side end surfaces 22c of adjacent permanent magnets 22 are also in close contact with each other.
  • the permanent magnet 22 may also be fixed using an adhesive, or the adhesive may be omitted.
  • the outer diameter of the permanent magnet 22 portion of the rotor 12 is, for example, 90 [mm]
  • the thickness of the scattering prevention member 23 is set to about 0.4 [mm].
  • a tension larger than a general tension is used when winding the ribbon-like material 23x.
  • a tension of, for example, about 100 [N] is used, which prevents wrinkles and does not cause displacement during heating and after curing.
  • a tension of, for example, 250 to 500 [N] is used when winding the ribbon-like material 23x.
  • heat curing is performed while maintaining a state in which high tension is applied to the ribbon-shaped material 23x using a jig (not shown) or the like.
  • the scattering prevention member 23 of the permanent magnet 22 in the rotor 12 has a tightening force F2 toward the inner diameter side of the rotor 12 that is greater than the centrifugal force F1 of the permanent magnet 22 that occurs when the rotor 12 rotates at its maximum rotation. That is, in the normal use range of the rotor 12, the clamping force F2 of the anti-scattering member 23 always exceeds the centrifugal force F1 of the permanent magnet 22. Therefore, in addition to the function of preventing the scattering prevention member 23 from scattering the permanent magnet 22, deformation of the scattering prevention member 23 toward the outer diameter side can also be sufficiently suppressed.
  • the gap between the rotor 12 and the stator 11, which is a member disposed on the outer diameter side of the rotor 12 in this embodiment, can be set small.
  • the magnetic transmission efficiency with the stator 11 is improved, and it can also contribute to downsizing of the motor 10.
  • the scattering prevention member 23 can be easily manufactured.
  • the scattering prevention member 23 can be easily produced.
  • a uniform tightening force F2 of the anti-scattering member 23 acts on the entire outer surface 22b of the permanent magnet 22 in the circumferential direction of the rotor 12. Therefore, the permanent magnet 22 can be kept in a more stable fixed state. Furthermore, when a Halbach array magnet in which three magnet materials are coupled in the circumferential direction is used as the permanent magnet 22, for example, each magnet material can be stably fixed.
  • the anti-scattering member 23 is provided so as to cover the entire permanent magnet 22, it may be configured so that a portion of the permanent magnet 22 is exposed.
  • the shape of the permanent magnet 22 is just an example, and may be changed as appropriate. Further, although the permanent magnet 22 is a Halbach array magnet as an example, other magnets such as a polar anisotropic magnet or a radially oriented magnet may be used.
  • the configuration of the rotor 12 may be changed as appropriate.
  • the shape of the rotor base 21 may be changed as appropriate.
  • the present invention has been applied to a radial type in which the rotor 12 and the stator 11 face each other in the radial direction, it may also be applied to an axial type in which the rotor and the stator face each other in the axial direction.
  • a rotor (12) comprising a scattering prevention member (23) attached in a manner; a stator (11) that generates a rotating magnetic field for rotationally driving the rotor;
  • a motor (10) comprising:
  • the scattering prevention member has a tightening force (F2) toward the inner diameter side of the rotor that is greater than or equal to the centrifugal force (F1) of the permanent magnet that occurs when the rotor is used at its maximum rotation. motor.

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

Abstract

Ce rotor (12) a une partie de base de rotor (21), une pluralité d'aimants permanents (22) agencés dans une direction circonférentielle sur une surface externe (21a) de la partie de base de rotor, et un élément de prévention de diffusion (23) monté le long de la surface externe de la pluralité d'aimants permanents de façon à aller autour du rotor. L'élément de prévention de diffusion a une force de serrage (F2) vers l'intérieur radial du rotor supérieure à la force centrifuge (F1) des aimants permanents générée au moment de la rotation maximale pendant le fonctionnement du rotor.
PCT/JP2023/013151 2022-03-31 2023-03-30 Rotor et procédé de fabrication de rotor Ceased WO2023190855A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112023001727.1T DE112023001727T5 (de) 2022-03-31 2023-03-30 Rotor und verfahren zu dessen herstellung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-060568 2022-03-31
JP2022060568A JP2023151124A (ja) 2022-03-31 2022-03-31 ロータ及びロータの製造方法

Publications (1)

Publication Number Publication Date
WO2023190855A1 true WO2023190855A1 (fr) 2023-10-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/013151 Ceased WO2023190855A1 (fr) 2022-03-31 2023-03-30 Rotor et procédé de fabrication de rotor

Country Status (3)

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JP (1) JP2023151124A (fr)
DE (1) DE112023001727T5 (fr)
WO (1) WO2023190855A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1189142A (ja) * 1997-09-10 1999-03-30 Hitachi Ltd 永久磁石式同期電動機及びその製造方法ならびに永久磁石式同期電動機を備えた遠心圧縮機
JP2021044877A (ja) * 2019-09-09 2021-03-18 トヨタ紡織株式会社 ロータ及びロータの製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003111323A (ja) * 2001-07-24 2003-04-11 Honda Motor Co Ltd 発電電動機のロータ
JP2016100974A (ja) 2014-11-20 2016-05-30 多摩川精機株式会社 インナーロータモータ、そのロータ、およびロータ製造方法
JP7095823B2 (ja) 2017-09-19 2022-07-05 株式会社セガ プログラム、情報処理装置、及び情報処理方法
JP7521182B2 (ja) * 2019-09-24 2024-07-24 株式会社明電舎 覆い部材

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1189142A (ja) * 1997-09-10 1999-03-30 Hitachi Ltd 永久磁石式同期電動機及びその製造方法ならびに永久磁石式同期電動機を備えた遠心圧縮機
JP2021044877A (ja) * 2019-09-09 2021-03-18 トヨタ紡織株式会社 ロータ及びロータの製造方法

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DE112023001727T5 (de) 2025-01-16
JP2023151124A (ja) 2023-10-16

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