JPS57162960A - Dc brushless motor - Google Patents

Dc brushless motor

Info

Publication number
JPS57162960A
JPS57162960A JP4644481A JP4644481A JPS57162960A JP S57162960 A JPS57162960 A JP S57162960A JP 4644481 A JP4644481 A JP 4644481A JP 4644481 A JP4644481 A JP 4644481A JP S57162960 A JPS57162960 A JP S57162960A
Authority
JP
Japan
Prior art keywords
coils
magnetic flux
magnetic fluxes
magnetic
generated
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.)
Pending
Application number
JP4644481A
Other languages
Japanese (ja)
Inventor
Kuniyoshi Nakamura
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.)
Nidec Advanced Motor Corp
Original Assignee
Nidec Servo Corp
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 Nidec Servo Corp filed Critical Nidec Servo Corp
Priority to JP4644481A priority Critical patent/JPS57162960A/en
Publication of JPS57162960A publication Critical patent/JPS57162960A/en
Pending 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
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Brushless Motors (AREA)

Abstract

PURPOSE:To improve the S/N of a DC brushless motor by suitably selecting the number of poles of permanent magnet and the number of stator coils and disposing them at the prescribed position, thereby reducing the leakage magnetic flux. CONSTITUTION:The number N of poles of a flat circular permanent magnets 16 is set to P=2(2n+1), the number N of stator coils 19 is set to N=2n+2, where n represents positive integer, in such a manner that the quantities of magnetic fluxes generated from two coils disposed at the symmetrical position at the axis of the rotor as a center are equal and their directions are opposite. A drawing shows the case of n=2. When currents of directions of arrows flows, for example, in the coils 1, 4, the magnetic fluxes generated at the respective coils are generated so that the magnetic flux of the coil 1 passes from the above to the below of the paper surface and the magnetic flux of the coil 4 passed from the below to the above of the paper surface and the magnetic fluxes of the coils 3, 5 and 3, 6 become the same. Accordingly, the magnetic fluxes are sufficiently erased at the same set, so that the synthesized magnetic flux becomes zero, thereby reducing the external leakage of the magnetic flux.
JP4644481A 1981-03-31 1981-03-31 Dc brushless motor Pending JPS57162960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4644481A JPS57162960A (en) 1981-03-31 1981-03-31 Dc brushless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4644481A JPS57162960A (en) 1981-03-31 1981-03-31 Dc brushless motor

Publications (1)

Publication Number Publication Date
JPS57162960A true JPS57162960A (en) 1982-10-06

Family

ID=12747331

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4644481A Pending JPS57162960A (en) 1981-03-31 1981-03-31 Dc brushless motor

Country Status (1)

Country Link
JP (1) JPS57162960A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160868A2 (en) * 1984-04-23 1985-11-13 Kabushiki Kaisha Yaskawa Denki Seisakusho Brushless motor
WO1994019859A1 (en) * 1993-02-17 1994-09-01 Cadac Holdings Limited Discoidal dynamo-electric machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0160868A2 (en) * 1984-04-23 1985-11-13 Kabushiki Kaisha Yaskawa Denki Seisakusho Brushless motor
EP0160868A3 (en) * 1984-04-23 1987-01-14 Kabushiki Kaisha Yaskawa Denki Seisakusho Brushless motor
WO1994019859A1 (en) * 1993-02-17 1994-09-01 Cadac Holdings Limited Discoidal dynamo-electric machine
AU685077B2 (en) * 1993-02-17 1998-01-15 Cadac Limited Discoidal dynamo-electric machine

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