Title:
STEPPING MOTOR
Document Type and Number:
Japanese Patent JP3179694
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress oscillation torque by providing a stator having a three- phase winding applied to a plurality of cores each provided, at the forward end, with a stator pole tooth directing toward the center from the inner circumferential surface of an annular yoke, and a corresponding rotor having rotor poles provided with specified number of rotor pole teeth.
SOLUTION: A plurality of stators 2 are fixed, while directing inward, to the inner circumferential surface of a housing 1 forming an annular yoke. It is fixed, on the opposite sides with front and rear covers 4, 4' and the shaft 6 of a rotor 7 is held ratatably by means of bearings 5, 5'. Twelve stator poles 10-1,..., 10-12 are applied with stator coils 11-1,..., 11-12. Every third coils 11-1, 11-4, 11-7, 11-10 constitute a single phase. When the stator pole teeth of stator pole 10-1 face Nr pole teeth of rotor, the angle with respect to a rotor pole tooth closest to a stator pole tooth 10-2 becomes the step angle and a formula is satisfied. From the formula, Nr=12n±4 (n is an integer of 1 or above) is obtained. This structure realizes a microangle, low vibration three-phase motor.
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| JPH10174412 | STEPPING MOTOR |
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Inventors:
Masafumi Sakamoto
Application Number:
JP35234595A
Publication Date:
June 25, 2001
Filing Date:
December 28, 1995
Export Citation:
Assignee:
Nippon Servo Co., Ltd.
International Classes:
H02K37/04; (IPC1-7): H02K37/04
Domestic Patent References:
| JP5244759A | ||||
| JP5207724A | ||||
| JP4200260A | ||||
| JP5103456A | ||||
| JP57180365A | ||||
| JP1186160A | ||||
| JP4128078U |
Attorney, Agent or Firm:
Haruya Saito (1 person outside)
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