WO2012118787A3 - Brushless pm machine construction enabling low coercivity magnets - Google Patents

Brushless pm machine construction enabling low coercivity magnets Download PDF

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Publication number
WO2012118787A3
WO2012118787A3 PCT/US2012/026897 US2012026897W WO2012118787A3 WO 2012118787 A3 WO2012118787 A3 WO 2012118787A3 US 2012026897 W US2012026897 W US 2012026897W WO 2012118787 A3 WO2012118787 A3 WO 2012118787A3
Authority
WO
WIPO (PCT)
Prior art keywords
magnets
brushless
machine construction
low coercivity
enabling low
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/US2012/026897
Other languages
French (fr)
Other versions
WO2012118787A2 (en
Inventor
Jon Lutz
Josh Ley
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.)
Danfoss Power Solutions US Co
Original Assignee
UQM Technologies Inc
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 UQM Technologies Inc filed Critical UQM Technologies Inc
Priority to CA2828527A priority Critical patent/CA2828527C/en
Priority to JP2013556795A priority patent/JP5869592B2/en
Priority to EP12752549.1A priority patent/EP2681829B1/en
Publication of WO2012118787A2 publication Critical patent/WO2012118787A2/en
Publication of WO2012118787A3 publication Critical patent/WO2012118787A3/en
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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49012—Rotor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Hard Magnetic Materials (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

The present disclosure provides a brushless permanent magnet machine which includes an essentially circular shaped rotor, and a pair of magnets arranged in the rotor. The magnets are each U-shaped and have a thickness direction extending along a contour of the corresponding magnet between the opposite poles of the corresponding magnet, respectively. The magnets are each composed of a non-rare earth material having a lower coercivity than a rare earth material. A direction of magnetization of each of the pair of magnets is parallel to the thickness direction of the corresponding magnet. The present disclosure also provides a method of manufacturing such a brushless permanent magnet machine.
PCT/US2012/026897 2011-02-28 2012-02-28 Brushless pm machine construction enabling low coercivity magnets Ceased WO2012118787A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA2828527A CA2828527C (en) 2011-02-28 2012-02-28 Brushless pm machine construction enabling low coercivity magnets
JP2013556795A JP5869592B2 (en) 2011-02-28 2012-02-28 Brushless permanent magnet electric machine capable of using low coercivity magnets
EP12752549.1A EP2681829B1 (en) 2011-02-28 2012-02-28 Brushless pm machine construction enabling low coercivity magnets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161447280P 2011-02-28 2011-02-28
US61/447,280 2011-02-28

Publications (2)

Publication Number Publication Date
WO2012118787A2 WO2012118787A2 (en) 2012-09-07
WO2012118787A3 true WO2012118787A3 (en) 2012-11-22

Family

ID=46718476

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/026897 Ceased WO2012118787A2 (en) 2011-02-28 2012-02-28 Brushless pm machine construction enabling low coercivity magnets

Country Status (5)

Country Link
US (1) US8928198B2 (en)
EP (1) EP2681829B1 (en)
JP (1) JP5869592B2 (en)
CA (1) CA2828527C (en)
WO (1) WO2012118787A2 (en)

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US10205359B2 (en) 2013-11-18 2019-02-12 Steering Solutions Ip Holding Corporation Low cost permanent magnet motor for an electric power steering system
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EP2991196A3 (en) 2014-09-01 2016-06-29 Siemens Aktiengesellschaft Permanent magnet for a rotor of an electric machine
US9960647B2 (en) * 2015-10-01 2018-05-01 Vanntec Llc Enhanced flux-density magnet
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TWM576750U (en) 2017-07-25 2019-04-11 美商米沃奇電子工具公司 Electrical composition, electric device system, battery pack, electric motor, motor assembly and electric motor assembly
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CN110460184A (en) * 2019-08-20 2019-11-15 瑞昌市森奥达科技有限公司 Improve the brushless permanent magnet electromotor of low performance magnet
KR20250130422A (en) 2019-10-25 2025-09-01 자코비 모터스 엘엘씨 Methods of magnetizing and controlling a variable-flux memory motor
US11996739B2 (en) * 2020-01-09 2024-05-28 Jacobi Motors LLC Curved magnets for a variable-flux memory motor
US11936256B2 (en) * 2020-04-24 2024-03-19 Jacobi Motors, Llc Flux-mnemonic permanent magnet synchronous machine and magnetizing a flux-mnemonic permanent magnet synchronous machine
WO2022155535A1 (en) 2021-01-14 2022-07-21 Advanced Magnet Lab, Inc. Electrical machines using axially-magnetized curvilinear permanent magnets
EP4146420A4 (en) 2020-05-05 2024-06-05 Advanced Magnet Lab, Inc. PROCESS FOR THE CONTINUOUS MANUFACTURING OF PERMANENT MAGNETS
US11973376B2 (en) * 2021-04-06 2024-04-30 Hamilton Sundstrand Corporation Electric motor with simplified winding and U-shaped rotor
US12483165B2 (en) 2022-11-09 2025-11-25 Dana Tm4 Italia S.R.L. Monitoring and remediation process and system for an electric motor
CN116633051B (en) * 2023-07-24 2023-10-24 中国第一汽车股份有限公司 Motor rotor, permanent magnet synchronous motor and vehicle
US12558980B2 (en) 2023-11-09 2026-02-24 Jacobi Motors, Llc Integrated variable flux memory motor charger
US12614998B2 (en) 2024-03-04 2026-04-28 Jacobi Motors, Llc System for multi-variable flux memory motor configuration

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Also Published As

Publication number Publication date
EP2681829A2 (en) 2014-01-08
EP2681829A4 (en) 2018-03-28
JP5869592B2 (en) 2016-02-24
JP2014511669A (en) 2014-05-15
EP2681829B1 (en) 2020-07-01
CA2828527C (en) 2016-09-13
US8928198B2 (en) 2015-01-06
CA2828527A1 (en) 2012-09-07
US20120217834A1 (en) 2012-08-30
WO2012118787A2 (en) 2012-09-07

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