WO2012084031A3 - Rotor with magnetic poles - Google Patents

Rotor with magnetic poles Download PDF

Info

Publication number
WO2012084031A3
WO2012084031A3 PCT/EP2010/070507 EP2010070507W WO2012084031A3 WO 2012084031 A3 WO2012084031 A3 WO 2012084031A3 EP 2010070507 W EP2010070507 W EP 2010070507W WO 2012084031 A3 WO2012084031 A3 WO 2012084031A3
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
pole
rotor
magnitude
decreasing
Prior art date
Application number
PCT/EP2010/070507
Other languages
French (fr)
Other versions
WO2012084031A2 (en
Inventor
Robert Chin
Juhani Mantere
Original Assignee
Abb Research Ltd
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 Abb Research Ltd filed Critical Abb Research Ltd
Priority to PCT/EP2010/070507 priority Critical patent/WO2012084031A2/en
Publication of WO2012084031A2 publication Critical patent/WO2012084031A2/en
Publication of WO2012084031A3 publication Critical patent/WO2012084031A3/en

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
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H02K1/2781—Magnets shaped to vary the mechanical air gap between the magnets and the stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Abstract

A rotor 40 for an electrical machine comprises a pole 10 for creating a magnetic field for a stator 30 to interact with. The pole 10 is configured such that the magnetic field's magnitude decreases in increments 110, 120 in a circumferential direction from the middle of the pole 10 towards an edge 20 of the same. The decreasing magnetic field' s magnitude contributes to decreasing a cogging torque, and the incremental realization renders the pole manufacturing cheaper compared with poles 10 configured to have a continuously decreasing magnetic field's magnitude.
PCT/EP2010/070507 2010-12-22 2010-12-22 Rotor with incremental poles WO2012084031A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/070507 WO2012084031A2 (en) 2010-12-22 2010-12-22 Rotor with incremental poles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/070507 WO2012084031A2 (en) 2010-12-22 2010-12-22 Rotor with incremental poles

Publications (2)

Publication Number Publication Date
WO2012084031A2 WO2012084031A2 (en) 2012-06-28
WO2012084031A3 true WO2012084031A3 (en) 2012-09-27

Family

ID=44624934

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/070507 WO2012084031A2 (en) 2010-12-22 2010-12-22 Rotor with incremental poles

Country Status (1)

Country Link
WO (1) WO2012084031A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2822158A1 (en) * 2012-08-17 2014-02-17 Envision Energy (Denmark) Aps Electrical machine with magnetic flux intensifier
EP3799262A1 (en) * 2019-09-27 2021-03-31 Siemens Aktiengesellschaft Electric rotating machine with permanent magnets
CN112751435B (en) * 2020-12-28 2022-08-19 哈尔滨宇龙自动化有限公司 Magnetic integrated eccentric magnetic pole structure of external rotor hub motor
JP2023082880A (en) * 2021-12-03 2023-06-15 山洋電気株式会社 Rotor of embedded magnet type synchronous motor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117450A (en) * 1982-12-21 1984-07-06 Toshiba Corp Permanent magnet rotor and manufacture thereof
JPH08340651A (en) * 1995-06-12 1996-12-24 Toshiba Corp Permanent magnet, and permanent magnet rotating machine
JPH114555A (en) * 1997-06-11 1999-01-06 Hitachi Ltd Permanent magnet rotating machine
EP1816725A1 (en) * 2006-02-03 2007-08-08 University of Teheran Permanent magnet assembly for electric machines and actuators, method for their design and electric machines and actuators

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2615779B2 (en) 1988-03-14 1997-06-04 トヨタ自動車株式会社 Rotating field motor
JP4404670B2 (en) 2004-03-31 2010-01-27 三洋電機株式会社 Permanent magnet motor
FR2927481B1 (en) 2008-02-08 2010-12-10 Alstom Transport Sa METHOD FOR MOUNTING A MAGNETIC POLE AND ASSOCIATED ROTOR
FI20090115A0 (en) 2009-03-25 2009-03-25 Abb Oy Permanently magnetized electric machine and permanent magnet for electric machine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117450A (en) * 1982-12-21 1984-07-06 Toshiba Corp Permanent magnet rotor and manufacture thereof
JPH08340651A (en) * 1995-06-12 1996-12-24 Toshiba Corp Permanent magnet, and permanent magnet rotating machine
JPH114555A (en) * 1997-06-11 1999-01-06 Hitachi Ltd Permanent magnet rotating machine
EP1816725A1 (en) * 2006-02-03 2007-08-08 University of Teheran Permanent magnet assembly for electric machines and actuators, method for their design and electric machines and actuators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199710, Derwent World Patents Index; AN 1997-106270, XP002679756 *

Also Published As

Publication number Publication date
WO2012084031A2 (en) 2012-06-28

Similar Documents

Publication Publication Date Title
WO2009140419A3 (en) Motor with magnetic sensors
EP2242167A3 (en) Structure for linear and rotary electric machines
WO2013135257A3 (en) Electrical machine
WO2010039786A3 (en) Electric machine
WO2012062639A3 (en) Electric motor
WO2012079068A3 (en) Permanent magnet motor with field weakening
WO2010100463A3 (en) Electric machine
WO2011136475A3 (en) Coil arrangement method for doubly salient permanent magnet electrical appliances
WO2012020348A3 (en) Electric motor and method of braking using an electric motor
GB201222371D0 (en) Switched reluctance motor
WO2008092801A3 (en) 18/8 synchronous motor
WO2013041353A3 (en) Electric motor
WO2011112019A3 (en) Magnetic bearing and turbo equipment
EP3032720A3 (en) Single phase brushless motor
WO2010127891A3 (en) Synchronous machine
EP2388889A3 (en) Stress reduction in electrical machines
EP2592728A3 (en) Electromagnetic device
WO2013030108A3 (en) Induction machine having an outside rotor
WO2012084031A3 (en) Rotor with magnetic poles
WO2013150048A3 (en) Electric motor
WO2011048581A3 (en) Electric motor with permanent magnet rotor
WO2012150114A3 (en) Electric motor
WO2012171602A3 (en) Synchronous motor
MX2011002583A (en) Permanent magnet rotor and motor using the same.
EP2611008A3 (en) Switched reluctance motor

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10793269

Country of ref document: EP

Kind code of ref document: A2