Title:
RING MAGNET, MANUFACTURING METHOD THEREFOR, ROTOR, ROTATING MACHINE, MAGNETIC FIELD GENERATING APPARATUS THEREFOR, AND RING MAGNET MANUFACTURING APPARATUS
Document Type and Number:
Japanese Patent JP2003257762
Kind Code:
A
Abstract:
To provide a ring magnet, together with its manufacturing method, which has low cogging torque, high efficiency, and high torque by appropriately adjusting orientation of magnetic powder constituting the ring magnet, and also to provide a rotor, a rotating machine, a magnetic field generating apparatus therefor, and a ring magnet manufacturing apparatus.
The ring magnet in which hard magnetic material is formed into ring has orientation rate in the easy axis of magnetization formed radially at pole center of 50 vol.% or higher. A rotor and a rotating machine using it, a manufacturing method therefor by a specified magnetic field generating means, a magnetic field generating apparatus, and a ring magnet manufacturing apparatus are disclosed.
Inventors:
KOMURO MATAHIRO
KITAMURA MASAJI
ITO MOTOYA
KURIYAMA YOSHIHIKO
KITAMURA MASAJI
ITO MOTOYA
KURIYAMA YOSHIHIKO
Application Number:
JP2002051761A
Publication Date:
September 12, 2003
Filing Date:
February 27, 2002
Export Citation:
Assignee:
HITACHI LTD
HITACHI METALS LTD
HITACHI METALS LTD
International Classes:
H01F1/08; H01F7/02; H01F41/02; H02K1/27; H02K15/03; H01F13/00; (IPC1-7): H01F41/02; H01F1/08; H02K1/27; H02K15/03
Attorney, Agent or Firm:
Yukihiko Takada
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