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Title:
ANISOTROPIC BOND MAGNET FOR FOUR-MAGNETIC-POLE MOTOR, MOTOR USING THE SAME, DEVICE FOR ORIENTATION PROCESSING OF ANISOTROPIC BOND MAGNET FOR FOUR-MAGNETIC-POLE MOTOR
Document Type and Number:
WIPO Patent Application WO/2005/104337
Kind Code:
A1
Abstract:
[PROBLEMS] To realize an anisotropic bond magnet capable of reducing cogging torque without lowering the output torque. [MEANS FOR SOLVING PROBLEMS] There is provided an anisotropic bond magnet of a hollow cylindrical shape formed by molding anisotropic magnetic powder by resin for use in a four-magnetic-pole motor. The orientation distribution of the anisotropic magnetic powder at the cross section vertical to the axis of the anisotropic bond magnet is in the normal direction of the cylinder side surface of the hollow cylindrical shape at the main section of the magnetic pole cycle. At the transient section where the magnetic pole direction changes, the orientation distribution gradually becomes the circumferential tangent direction of the cylinder side surface as approaching the neutral point of the magnetic pole, and is the circumferential tangent direction of the cylinder side surface at the neutral point, and gradually becomes the normal direction of the cylindrical side surface as being farther from the neutral point.

Inventors:
Honkura, Yoshinobu c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
Matsuoka, Hiroshi c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
Kato, Masahiko c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
Nagaya, Daisuke c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
Application Number:
PCT/JP2005/007513
Publication Date:
November 03, 2005
Filing Date:
April 20, 2005
Export Citation:
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Assignee:
AICHI STEEL CORPORATION (1 Wano-wari, Arao-machi Tokai-shi Aichi, 66, 47686, JP)
Honkura, Yoshinobu c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
Matsuoka, Hiroshi c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
Kato, Masahiko c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
Nagaya, Daisuke c/o AICHI STEEL CORPORATION 1 (Wano-wari Arao-mach, Tokai-shi Aichi 66, 47686, JP)
International Classes:
B22F3/00; B22F3/03; B22F5/10; H01F41/02; H02K15/03; H02K23/04; (IPC1-7): H02K15/03; B22F3/00; H01F41/02; H02K23/04
Foreign References:
JP2004023085A
JP2004056835A
JPH0686484A
JPH1022153A
JPH10177928A
JP2004111944A
Attorney, Agent or Firm:
Fujitani, Osamu (Marunouchi KS Bldg. 16F, 18-25 Marunouchi 2-chome, Naka-k, Nagoya-shi Aichi 02, 46000, JP)
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