GB1354144A - Rotating electric machines - Google Patents

Rotating electric machines

Info

Publication number
GB1354144A
GB1354144A GB2993571A GB2993571A GB1354144A GB 1354144 A GB1354144 A GB 1354144A GB 2993571 A GB2993571 A GB 2993571A GB 2993571 A GB2993571 A GB 2993571A GB 1354144 A GB1354144 A GB 1354144A
Authority
GB
United Kingdom
Prior art keywords
stator
poles
motor
rotor
coils
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
GB2993571A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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
Priority claimed from JP5634770A external-priority patent/JPS498568B1/ja
Priority claimed from JP5635070A external-priority patent/JPS498569B1/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1354144A publication Critical patent/GB1354144A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

1354144 Dynamo-electric machines MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 25 June 1971 [26 June 1970 (2)] 29935/71 Heading H2A In a rotating electric machine including a rotor having a permanent magnet having p poles and a stator having q salient poles, each salient pole carries a coil and the coils are interconnected to form an m phase winding, where q is a multiple of m and less than p. In general, for a stator having (2n + 1) phases, the ratio of rotor poles to stator poles is (2n + 2)/(2n + 1), and for a stator having 2n phases the corresponding ratio is (n + 1)/n. The motor shown has a rotor 10 carrying a permanent magnet 11 having twenty poles and a stator 12 having fifteen poles, the coils being interconnected to form a 3 phase winding, each phase including five coils space uniformly round the stator periphery. The stator pole shoes are shaped so that the air gap is smallest at the pole centrelines. The motor may operate as a slow speed A.C. synchronous motor or as a D.C. commutatorless motor, in which case a speed dependent signal is derived from the counter e.m.f's induced in the stator windings, Fig. 2 (not shown). The motor is said to have a lower cogging force and hence to run more smoothly than prior art motors.
GB2993571A 1970-06-26 1971-06-25 Rotating electric machines Expired GB1354144A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5634770A JPS498568B1 (en) 1970-06-26 1970-06-26
JP5635070A JPS498569B1 (en) 1970-06-26 1970-06-26

Publications (1)

Publication Number Publication Date
GB1354144A true GB1354144A (en) 1974-06-05

Family

ID=26397294

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2993571A Expired GB1354144A (en) 1970-06-26 1971-06-25 Rotating electric machines

Country Status (5)

Country Link
CA (1) CA934814A (en)
DE (1) DE2132477C3 (en)
FR (1) FR2099961A5 (en)
GB (1) GB1354144A (en)
NL (1) NL154370B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119589A (en) * 1982-04-02 1983-11-16 Sony Corp Driving circuit for brushless d c motor
EP0201793A2 (en) * 1985-04-30 1986-11-20 Mitsubishi Kasei Corporation Motor
GB2246481A (en) * 1990-07-23 1992-01-29 Papst Motoren Gmbh & Co Kg Stator pole construction in an electric motor with improved torque ripple
WO2005043723A1 (en) * 2003-10-22 2005-05-12 Emerson Electric Co. Brushless permanent magnet motor with high power density, low cogging and low vibration
ITMI20081416A1 (en) * 2008-07-30 2010-01-31 Ducati Energia Spa PERMANENT MAGNET ELECTRIC GENERATOR FOR WIND TURBINES

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1603969A (en) * 1977-05-26 1981-12-02 Matsushita Electric Ind Co Ltd Rotary electrical machine
EP0094978B2 (en) * 1982-05-24 1995-11-02 Magnet-Motor Gesellschaft für magnetmotorische Technik mbH Rotatable electrical machine
US4491769A (en) * 1982-05-24 1985-01-01 Heidelberg Goetz Rotary electric machine
US4774428A (en) * 1987-05-15 1988-09-27 Synektron Corporation Compact three-phase permanent magnet rotary machine having low vibration and high performance
NZ221822A (en) * 1987-09-15 1990-02-26 Clark Automotive Dev Permanent magnet motor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119589A (en) * 1982-04-02 1983-11-16 Sony Corp Driving circuit for brushless d c motor
EP0201793A2 (en) * 1985-04-30 1986-11-20 Mitsubishi Kasei Corporation Motor
EP0201793A3 (en) * 1985-04-30 1988-04-27 Mitsubishi Chemical Industries Limited Motor motor
GB2246481A (en) * 1990-07-23 1992-01-29 Papst Motoren Gmbh & Co Kg Stator pole construction in an electric motor with improved torque ripple
GB2246481B (en) * 1990-07-23 1995-03-29 Papst Motoren Gmbh & Co Kg An electric motor with improved torque ripple
WO2005043723A1 (en) * 2003-10-22 2005-05-12 Emerson Electric Co. Brushless permanent magnet motor with high power density, low cogging and low vibration
US6946760B2 (en) 2003-10-22 2005-09-20 Emerson Electric Co. Brushless permanent magnet motor with high power density, low cogging and low vibration
ITMI20081416A1 (en) * 2008-07-30 2010-01-31 Ducati Energia Spa PERMANENT MAGNET ELECTRIC GENERATOR FOR WIND TURBINES

Also Published As

Publication number Publication date
CA934814A (en) 1973-10-02
NL7108601A (en) 1971-12-28
NL154370B (en) 1977-08-15
DE2132477A1 (en) 1972-01-13
FR2099961A5 (en) 1972-03-17
DE2132477C3 (en) 1979-09-06
DE2132477B2 (en) 1979-01-18

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years