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Patent Searching and Data


Title:
ACTUATOR
Document Type and Number:
Japanese Patent JP3635209
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide a rotor magnet structure which has a single-phase claw pole structure, can secure detent torque and dynamic torque sufficiently, has characteristics with a wide rotation movement angle range, has stable characteristics and is inexpensive, and a magnetization method for the rotor magnet.
SOLUTION: An actuator has a single-phase structure comprising an armature coil, and a rotor magnet 30 rotatably provided in the coil winding part of the armature coil with a minute gap therebetween. The rotor magnet 30 consists of one cylindrical magnet which has a magnetic flux distribution pattern wherein the peak positions of N-poles or S-poles or both of them are different step by step in an axial direction.


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Inventors:
Suzuki, Yuzuru
Fujitani, Sakae
Kagawa, Masaki
Application Number:
JP1999000098705
Publication Date:
April 06, 2005
Filing Date:
April 06, 1999
Export Citation:
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Assignee:
MINEBEA CO LTD
International Classes:
H02K1/27; H02K15/03; H02K21/14; H02K26/00; H02K33/16; H02K37/14; (IPC1-7): H02K1/27; H02K15/03; H02K26/00
Domestic Patent References:
JP64005347A
JP5168181A
JP61199447A
Attorney, Agent or Firm:
鈴木 弘男