GB1535604A - Permanent magnets for electrical machines - Google Patents

Permanent magnets for electrical machines

Info

Publication number
GB1535604A
GB1535604A GB25263/76A GB2526376A GB1535604A GB 1535604 A GB1535604 A GB 1535604A GB 25263/76 A GB25263/76 A GB 25263/76A GB 2526376 A GB2526376 A GB 2526376A GB 1535604 A GB1535604 A GB 1535604A
Authority
GB
United Kingdom
Prior art keywords
ferrite
coercive
remanence
volume
magnets
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.)
Expired
Application number
GB25263/76A
Other languages
English (en)
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1535604A publication Critical patent/GB1535604A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
    • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0205—Magnetic circuits with PM in general
    • H01F7/021—Construction of PM
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Dc Machiner (AREA)
  • Powder Metallurgy (AREA)
GB25263/76A 1975-06-20 1976-06-18 Permanent magnets for electrical machines Expired GB1535604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2527461A DE2527461C2 (de) 1975-06-20 1975-06-20 Verfahren zur Herstellung von anisotropen Segmentmagneten für elektrische Maschinen

Publications (1)

Publication Number Publication Date
GB1535604A true GB1535604A (en) 1978-12-13

Family

ID=5949514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25263/76A Expired GB1535604A (en) 1975-06-20 1976-06-18 Permanent magnets for electrical machines

Country Status (8)

Country Link
US (1) US4110718A (enExample)
JP (1) JPS523199A (enExample)
BR (1) BR7603927A (enExample)
DE (1) DE2527461C2 (enExample)
ES (1) ES448998A1 (enExample)
FR (1) FR2316710A1 (enExample)
GB (1) GB1535604A (enExample)
NL (1) NL7606637A (enExample)

Families Citing this family (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5367015U (enExample) * 1976-11-10 1978-06-06
US4187444A (en) * 1978-01-19 1980-02-05 Varian Associates, Inc. Open-circuit magnet structure for cross-field tubes and the like
DE2843375A1 (de) * 1978-10-05 1980-04-24 Bosch Gmbh Robert Permanentmagnet fuer elektrische maschinen, insbesondere kleinmotoren
DE2845264A1 (de) * 1978-10-18 1980-05-08 Bosch Gmbh Robert Elektrische maschine, insbesondere kleinmotor
JPS5759464A (en) * 1980-09-29 1982-04-09 Hitachi Ltd Field pole for dc electric machine
JPS5765262A (en) * 1980-10-08 1982-04-20 Hitachi Ltd Dc machine
DE3103475A1 (de) * 1981-02-03 1982-08-26 Robert Bosch Gmbh, 7000 Stuttgart Elektrische maschine, insbesondere kleinmotor
FR2499305B1 (fr) * 1981-02-04 1985-10-25 Radiotechnique Compelec Procede de fabrication d'aimants frittes comportant au moins deux zones de proprietes magnetiques differentes, et aimants ainsi obtenus
JPS57148566A (en) * 1981-03-09 1982-09-13 Hitachi Metals Ltd Composite permanent magnet for magnetic field
JPS57153558A (en) * 1981-03-17 1982-09-22 Hitachi Ltd Permanent magnet field starter with auxiliary pole
DE3119782C2 (de) * 1981-05-19 1985-01-10 Robert Bosch Gmbh, 7000 Stuttgart Kollektormaschine mit Permanentmagneten
JPS57189275U (enExample) * 1981-05-26 1982-12-01
JPS57189276U (enExample) * 1981-05-26 1982-12-01
JPS5815089A (ja) * 1981-07-14 1983-01-28 日立金属株式会社 酸化物永久磁石とその製造法
DE3248846T1 (de) * 1981-07-14 1983-07-07 Hitachi Metals, Ltd., Tokyo Verbundpermanentmagnet fuer die magnetische erregung und verfahren zu seiner herstellung
JPS5846280U (ja) * 1981-09-24 1983-03-29 藤崎　清則 永久磁石型回転電機
US4491756A (en) * 1981-10-21 1985-01-01 Hitachi, Ltd. Direct current dynamoelectric machine of permanent magnet type
US4471252A (en) * 1981-11-27 1984-09-11 Lucas Industries Limited Company Rotary dynamo electric machine with protection against demagnetization of low flux portion of permanent magnet poles
US4438362A (en) 1982-08-19 1984-03-20 Rotron, Incorporated Self-starting, direct current motor with permanent magnets of varied magnetic strength
JPS6014639U (ja) * 1983-07-07 1985-01-31 三菱電機株式会社 磁石モ−タの固定子
JPS60103269U (ja) * 1983-12-16 1985-07-13 三菱電機株式会社 磁石モ−タの固定子
US4544904A (en) * 1984-02-24 1985-10-01 Kishore Tarachand Composite magnet and magnetic circuit
JPS6158459A (ja) * 1984-08-29 1986-03-25 Hitachi Ltd 永久磁石界磁式直流機
JPS6162349A (ja) * 1984-08-31 1986-03-31 Hitachi Ltd 永久磁石式直流機の界磁構造
US4710239A (en) * 1984-09-14 1987-12-01 General Motors Corporation Hot pressed permanent magnet having high and low coercivity regions
JPS62161569U (enExample) * 1986-04-04 1987-10-14
DE3800916A1 (de) * 1988-01-14 1989-07-27 Siemens Ag Feldstellung fuer eine elektrische maschine mit permanentmagneten im erregerteil
US5047743A (en) * 1988-01-22 1991-09-10 Scesney Stanley P Integrated magnetic element
US4980593A (en) * 1989-03-02 1990-12-25 The Balbec Corporation Direct current dynamoelectric machines utilizing high-strength permanent magnets
US5093595A (en) * 1989-12-15 1992-03-03 Magnetic Peripherals Inc. Spindle motor having reduced torque ripple
EP0608008A3 (en) * 1990-04-09 1994-10-05 Nippon Conlux Co Ltd Linear motor.
US5608279A (en) * 1993-12-13 1997-03-04 Murray; David E. DC generator
US5409236A (en) * 1993-12-23 1995-04-25 Therrien; Joel M. Magnetic game or puzzle and method for making same
DE29515302U1 (de) * 1995-09-25 1995-11-30 Rheinmagnet Horst Baermann GmbH, 53819 Neunkirchen-Seelscheid Magnetanordnung
DE19628722A1 (de) * 1996-07-17 1998-01-22 Esselte Meto Int Gmbh Vorrichtung zum Deaktivieren eines Sicherungselementes für die elektronische Artikelsicherung
US6114792A (en) * 1996-11-18 2000-09-05 Siemens Aktiengesellschaft Commutator motor with a magnetic field deflecting moving charge carriers in the commutator brush
JPH11355985A (ja) * 1998-06-04 1999-12-24 Toshiba Corp 永久磁石形モータ
WO2001080400A2 (en) * 2000-04-19 2001-10-25 Crumax Magnetics, Inc. Permanent magnet stator assembly and method of manufacturing
US6462448B1 (en) * 2000-07-05 2002-10-08 Black & Decker Inc. Flux ring for an electric motor
DE60126465T2 (de) * 2000-12-18 2007-11-15 Asmo Co., Ltd., Kosai Gleichstrommotor
ES2518928T3 (es) * 2002-03-20 2014-11-05 Daikin Industries, Ltd. Motor del tipo de imanes permanentes y compresor que comprende el mismo
KR100680201B1 (ko) * 2004-09-17 2007-02-08 엘지전자 주식회사 영구자석형 모터
US7504754B2 (en) * 2005-10-31 2009-03-17 Caterpillar Inc. Rotor having multiple permanent-magnet pieces in a cavity
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
US20070284960A1 (en) * 2006-06-12 2007-12-13 Remy International, Inc. Magnet for a dynamoelectric machine, dynamoelectric machine and method
EP2061132B1 (en) * 2006-08-23 2023-07-19 Kabushiki Kaisha Toshiba Permanent magnetic type electric motor
US20110298313A1 (en) * 2006-10-13 2011-12-08 Black & Decker Inc. Motor With Permanent Magnets and Method of Manufacturing Power Tool With Same
JP5310544B2 (ja) * 2007-03-27 2013-10-09 日立金属株式会社 永久磁石式回転機およびその製造方法
DE112008001333T5 (de) * 2007-05-28 2010-04-22 Toyota Jidosha Kabushiki Kaisha, Toyota-shi Rotor für einen Motor mit eingebetteten Magneten und Motor mit eingebetteten Magneten
US7847461B2 (en) * 2007-06-06 2010-12-07 Gm Global Technology Operations, Inc. Multi-layer magnet arrangement in a permanent magnet machine for a motorized vehicle
DE102011014421A1 (de) * 2010-03-22 2012-08-09 Johnson Electric S.A. Elektromaschine
CN102611216A (zh) * 2011-01-19 2012-07-25 株式会社安川电机 混合型励磁永久磁铁及使用其的旋转电机用转子及发电机
EP2479872B1 (de) * 2011-01-25 2017-08-30 Siemens Aktiengesellschaft Permanenterregte synchronmaschine mit einem rotor
DE102012218498A1 (de) * 2012-10-11 2014-04-17 Siemens Aktiengesellschaft Dynamoelektrische Maschine mit einem mehrpoligen Rotor mit Permanentmagneten und deren Herstellung
DE102013013335A1 (de) * 2013-08-06 2015-02-12 Technische Universität Dortmund Verfahren zur Herstellung von Werkzeugspulen und/oder Werkzeugen für die Magnetumformung insbesondere dünnwandiger Werkstücke aus elektrisch leitfähigen Werkstoffen sowie entsprechend hergestellte Werkzeugspule
CN105794087B (zh) * 2013-12-05 2019-01-08 三菱电机株式会社 永久磁铁埋入式电动机、压缩机以及制冷空调装置
EP3180141B1 (en) * 2014-08-12 2018-12-05 ABB Schweiz AG Magnet having regions of different magnetic properties and method for forming such a magnet
CN111064289B (zh) * 2019-12-30 2022-05-17 智车优行科技（上海）有限公司 一种永磁同步电机、转子、转子磁钢及车辆
CN114731075A (zh) * 2020-07-23 2022-07-08 华为数字能源技术有限公司 电机转子和电机

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2048161A (en) * 1934-03-29 1936-07-21 Bosch Robert Dynamo-electric machine frame
FR1167248A (fr) * 1957-02-26 1958-11-21 Csf Perfectionnements aux aimants permanents
US2984866A (en) * 1959-06-04 1961-05-23 Steatite Res Corp Process and apparatus for filling and orienting dry, hard ferromagnetic powders into molds
NL104939C (enExample) * 1959-11-04
US3110675A (en) * 1960-03-25 1963-11-12 Gen Motors Corp Method of fabricating ferrite bodies
US3085291A (en) * 1960-10-31 1963-04-16 Philips Corp Device for manufacturing magnetically anisotropic bodies
US3454825A (en) * 1965-12-06 1969-07-08 Gen Electric Composite magnet structure
US3374504A (en) * 1966-04-11 1968-03-26 Ludwig Herbert Mold assembly with composite sole plate for double injection
DE1683921C3 (de) * 1966-08-27 1981-07-30 Naamloze Vennootschap Philips' Gloeilampenfabrieken, Eindhoven Verfahren und Vorrichtung zum Herstellen von magnetisierbaren Formlingen aus keramischem Material
US3535200A (en) * 1967-09-18 1970-10-20 Gen Motors Corp Multilayered mechanically oriented ferrite
GB1277876A (en) * 1968-08-16 1972-06-14 Lucas Industries Ltd Direct current dynamo electric machines
DE2109390A1 (de) * 1971-02-27 1972-09-07 Bosch Gmbh Robert Elektrische Anlage für Kraftfahrzeuge mit einem Wechselstromgenerator
US3768054A (en) * 1972-04-03 1973-10-23 Gen Electric Low flux leakage magnet construction
DE2231591C3 (de) * 1972-06-28 1979-08-09 Max 5060 Bergisch Gladbach Baermann Ringscheibenförmiger Dauermagnet für ein magnetisches Lager, vorzugsweise für Elektrizitätszähler, und daraus aufgebautes dauermagnetisches Lager
DE2314559C2 (de) * 1973-03-23 1982-08-05 Robert Bosch Gmbh, 7000 Stuttgart Zündanlage für Brennkraftmaschinen mit einem Magnetzünder
DE2318557C3 (de) * 1973-04-12 1978-12-07 Dorst-Keramikmaschinen-Bau Otto Dorst U. Dipl.-Ing. Walter Schlegel, 8113 Kochel Verfahren und Vorrichtung zum NaBpressen von magnetisierbaren Ferritformkörpern

Also Published As

Publication number Publication date
DE2527461A1 (de) 1977-01-13
BR7603927A (pt) 1977-04-05
US4110718A (en) 1978-08-29
DE2527461C2 (de) 1987-01-02
JPS6346564B2 (enExample) 1988-09-16
NL7606637A (nl) 1976-12-22
FR2316710A1 (fr) 1977-01-28
JPS523199A (en) 1977-01-11
FR2316710B1 (enExample) 1981-12-24
ES448998A1 (es) 1977-12-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee