Title:
BRUSHLESS DC MOTOR
Document Type and Number:
Japanese Patent JP3504532
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize expansion of application range of a brushless DC motor, wherein the application temperature and the torque of the motor can be increased by using a magnetic sensor having heat resistance, high frequency response and sensitivity up to a high magnetic field, as a magnetic sensor for the brushless DC motor, by combining a huge magnetic resistive element, in particular a magnetic particle dispersion type huge magnetic resistive element with a magnet for applying a bias magnetic field.
SOLUTION: This brushless DC motor is provided with a stator having a plurality of coils and a rotor magnet which is rotatably arranged facing the coils of the stator and magnetized in multipole, controls a current flowing in each phase coil on the basis of a detected signal of a magnetic sensor detecting the magnetic pole of the rotor magnet, and drives to rotate the rotor magnet. The magnetic sensor 1a is constituted by combining a huge magnetic resistance element 2a, arranged facing the rotor magnet with a magnet 8 which is arranged on the rear side of a spacer member 3a via the member.
Inventors:
Tetsuya Katsumi
Hideki Takeda
Yoshinori Miura
Hideki Takeda
Yoshinori Miura
Application Number:
JP11319099A
Publication Date:
March 08, 2004
Filing Date:
April 21, 1999
Export Citation:
Assignee:
YKK Corporation
Mytech Co., Ltd.
Mytech Co., Ltd.
International Classes:
H01L43/10; H02K29/08; (IPC1-7): H02K29/08
Domestic Patent References:
| JP10308313A | ||||
| JP10227809A | ||||
| JP8264860A | ||||
| JP8250330A | ||||
| JP8236314A | ||||
| JP867966A | ||||
| JP786017A | ||||
| JP5207721A | ||||
| JP448650U |
Attorney, Agent or Firm:
▲吉▼田 繁喜
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