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WO2018180037A1 - Moteur et dispositif de direction assistée électrique - Google Patents

Moteur et dispositif de direction assistée électrique Download PDF

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Publication number
WO2018180037A1
WO2018180037A1 PCT/JP2018/006222 JP2018006222W WO2018180037A1 WO 2018180037 A1 WO2018180037 A1 WO 2018180037A1 JP 2018006222 W JP2018006222 W JP 2018006222W WO 2018180037 A1 WO2018180037 A1 WO 2018180037A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
teeth
umbrella
motor
motor according
Prior art date
Application number
PCT/JP2018/006222
Other languages
English (en)
Japanese (ja)
Inventor
俊輔 村上
拓也 金子
明 一円
秀幸 金城
Original Assignee
日本電産株式会社
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 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201880022338.3A priority Critical patent/CN110476322B/zh
Publication of WO2018180037A1 publication Critical patent/WO2018180037A1/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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets

Definitions

  • a motor having an SPM (Surface Permanent Magnet) type rotor in which a magnet is fixed to an outer surface of a rotor core is known.
  • SPM Surface Permanent Magnet
  • a segment type magnet having an axial cross section formed in a D shape is used as a magnet.
  • the inner peripheral part is used as a magnet.
  • Patent Document 1 magnetic flux is generated radially from the magnet. This causes vibration due to pulsation. For this reason, the motor of Patent Document 1 has a problem that the magnetic characteristics are poor.
  • an object of the present invention is to provide a motor and an electric power steering apparatus that can reduce manufacturing costs while maintaining magnetic characteristics.
  • extending in the axial direction includes a state extending in the axial direction strictly and a state extending in a direction tilted within a range of less than 45 degrees with respect to the axial direction.
  • extending in the radial direction in the present specification includes a state extending in the radial direction strictly and a state extending in a direction tilted within a range of less than 45 degrees with respect to the radial direction.
  • the motor 1 mainly includes a housing 10, bearings 21 and 22, a bearing holder 30, a rotor 40, and a stator 100.
  • the plurality of segment magnets 43 extend in the axial direction and are arranged in a ring around the central axis A.
  • the outer surfaces of the plurality of segment magnets 43 form one circular arc.
  • the outer surfaces of the plurality of segment magnets 43 form part of a circle centered on the central axis A.
  • the inner surface portion 43a is linear when viewed from the upper side in the axial direction.
  • the inner surface portion 43 a contacts the outer surface of the rotor core 41.
  • the pair of side surface portions 43b extend radially outward from one end and the other end of the inner surface portion 43a in the circumferential direction.
  • the pair of side surface portions 43b are located on opposite sides in the circumferential direction.
  • the outer surface portion 43 c is an outer surface on the radially outer side of the segment magnet 43.
  • the outer surface portion 43c has a curved shape that is convex outward in the radial direction. When viewed from the upper side in the axial direction, the outer shape of the outer surface portion 43c is a curve.
  • the stator core 101 has a plurality of electromagnetic steel plates laminated in the axial direction.
  • the plurality of electromagnetic steel plates are fixed by caulking or the like.
  • the stator core may be composed of a single member.
  • the stator core 101 of the present embodiment is composed of a plurality of divided cores that can be divided in the circumferential direction.
  • the stator core is not particularly limited, and may be constituted by a straight core, a round core, or the like.
  • the core back 104 is annular.
  • the core back 104 has a core back groove 104a that is recessed radially inward on the outer surface on the radially outer side.
  • Each core back groove 104 a is located on the radially outer side of each tooth 105.
  • the circumferential distance L110 at the radially inner end of the first bending portion 110 is greater than the circumferential distances L120 and L130 at the radially inner ends of the second and third bending portions 120, 130. ,large.
  • Stator 100 of the present embodiment is a so-called slot open.
  • the maximum width in the circumferential direction of the umbrella 106 and the maximum width in the circumferential direction of the segment magnet 43 are the same.
  • the steering system 520 is, for example, a steering handle 521, a steering shaft 522 (also referred to as “steering column”), universal shaft joints 523A, 523B, and a rotating shaft 524 (also referred to as “pinion shaft” or “input shaft”). ), A rack and pinion mechanism 525, a rack shaft 526, left and right ball joints 552A and 552B, tie rods 527A and 527B, knuckle 528A and 528B, and left and right steering wheels (for example, left and right front wheels) 529A and 529B.
  • the steering handle 521 is connected to the rotating shaft 524 via a steering shaft 522 and universal shaft joints 523A and 523B.
  • the electric power steering apparatus 500 was mentioned here as an example of the usage method of the motor 1, the usage method of the motor 1 is not limited.
  • the motor of the present invention can be widely used in various devices including various motors such as a vacuum cleaner, a dryer, a ceiling fan, a washing machine, a refrigerator, and an electric power steering device.

Landscapes

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

Abstract

Ce moteur (1) est pourvu d'un rotor (40) et d'un stator (100). Le rotor (40) comprend un noyau de rotor (41) et une pluralité d'aimants segmentés (43). Les surfaces externes de la pluralité d'aimants segmentés (43) constituent des arcs d'un seul cercle. Le stator (100) comprend : un dos de noyau annulaire (104) ; une pluralité de dents (105) s'étendant radialement vers l'intérieur à partir du dos de noyau (104) ; et une pluralité de parasols (106) qui font face au rotor, sont chacun reliés à l'extrémité radialement intérieure d'une dent correspondante parmi les dents (105), et s'étendent chacun vers les deux côtés circonférentiels. Chacun des parasols (106) comprend au moins : une première section incurvée (110) incurvée radialement vers l'intérieur ; et des deuxième et troisième sections incurvées (120, 130) situées au niveau des extrémités externes circonférentielles opposées de la première section incurvée (110) et incurvées radialement vers l'extérieur.
PCT/JP2018/006222 2017-03-31 2018-02-21 Moteur et dispositif de direction assistée électrique WO2018180037A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880022338.3A CN110476322B (zh) 2017-03-31 2018-02-21 马达以及电动助力转向装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762479487P 2017-03-31 2017-03-31
US62/479,487 2017-03-31

Publications (1)

Publication Number Publication Date
WO2018180037A1 true WO2018180037A1 (fr) 2018-10-04

Family

ID=63675456

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/006222 WO2018180037A1 (fr) 2017-03-31 2018-02-21 Moteur et dispositif de direction assistée électrique

Country Status (2)

Country Link
CN (1) CN110476322B (fr)
WO (1) WO2018180037A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0295150A (ja) * 1988-09-27 1990-04-05 Matsushita Electric Works Ltd 永久磁石回転子
JPH03243155A (ja) * 1990-02-20 1991-10-30 Sankyo Seiki Mfg Co Ltd 回転電機
JP2002291179A (ja) * 2001-03-27 2002-10-04 Matsushita Seiko Co Ltd ハーフピッチ型コンデンサ誘導電動機の固定子鉄芯
JP2003533158A (ja) * 2000-04-28 2003-11-05 シーメンス アクチエンゲゼルシヤフト ブラシレスモータ
JP2007209186A (ja) * 2006-02-06 2007-08-16 Mitsubishi Electric Corp 同期電動機及び同期電動機の製造方法
JP2009201207A (ja) * 2008-02-20 2009-09-03 Jtekt Corp モータロータ及びその製造方法及び電動パワーステアリング装置
WO2009119734A1 (fr) * 2008-03-26 2009-10-01 日本電産株式会社 Moteur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200462693Y1 (ko) * 2008-01-31 2012-09-26 삼성전자주식회사 자속 집중형 전동기
CN202260673U (zh) * 2011-08-25 2012-05-30 江苏上骐集团有限公司 一种用于交流永磁伺服电动机的定子冲片
JP5672507B2 (ja) * 2012-07-09 2015-02-18 株式会社デンソー 回転電機
KR20140040306A (ko) * 2012-09-24 2014-04-03 삼성전자주식회사 모터
JP6326614B2 (ja) * 2013-11-08 2018-05-23 株式会社明電舎 永久磁石表面貼付形モータの磁石固定構造及びその設計手法
CN105680587B (zh) * 2016-04-06 2018-11-16 苏州市润豪电机有限公司 无刷吸尘器电机降噪装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0295150A (ja) * 1988-09-27 1990-04-05 Matsushita Electric Works Ltd 永久磁石回転子
JPH03243155A (ja) * 1990-02-20 1991-10-30 Sankyo Seiki Mfg Co Ltd 回転電機
JP2003533158A (ja) * 2000-04-28 2003-11-05 シーメンス アクチエンゲゼルシヤフト ブラシレスモータ
JP2002291179A (ja) * 2001-03-27 2002-10-04 Matsushita Seiko Co Ltd ハーフピッチ型コンデンサ誘導電動機の固定子鉄芯
JP2007209186A (ja) * 2006-02-06 2007-08-16 Mitsubishi Electric Corp 同期電動機及び同期電動機の製造方法
JP2009201207A (ja) * 2008-02-20 2009-09-03 Jtekt Corp モータロータ及びその製造方法及び電動パワーステアリング装置
WO2009119734A1 (fr) * 2008-03-26 2009-10-01 日本電産株式会社 Moteur

Also Published As

Publication number Publication date
CN110476322B (zh) 2021-10-29
CN110476322A (zh) 2019-11-19

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