Title:
METHOD FOR DRIVING STEPPING MOTOR OF MULTIPHASE HYBRID TYPE
Document Type and Number:
WIPO Patent Application WO/1994/018742
Kind Code:
A1
Abstract:
A motor improved in the torque stiffness, and reduced in the resonance vibration when the motor rotates. The fixed magnetic poles each have two or more small teeth which are arranged at the same interval as the tooth pitch of the rotor. The total number (NS) of small teeth of the stators of an asymmetrical type is determined by NS = 5 x (n0 + n1) (where n0 is the number of small teeth of each of five fixed magnetic poles, and n1 is the number of small teeth of the other five fixed magnetic poles). The stators of asymmetrical type having n1 small teeth are arranged between the stators of asymmetrical type having n0 small teeth. The stators of asymmetrical type having the n0 small teeth are arranged on the side opposite to the stators of asymmetrical type having n1 small teeth across the shaft, respectively. In the winding wound on the asymmetric stator, N and S poles are generated. In both full-step and half-step modes, the numbers of the N and S poles are equal because of the magnetization of the poles in each step. In all the steps there are a pair or more of S poles which are adjacent to each other.
Inventors:
YOSHIMURA NORIYUKI (JP)
YOSHIDA KENJI (JP)
YOSHIDA KENJI (JP)
Application Number:
PCT/JP1994/000138
Publication Date:
August 18, 1994
Filing Date:
February 01, 1994
Export Citation:
Assignee:
MINEBEA CO LTD (JP)
YOSHIMURA NORIYUKI (JP)
YOSHIDA KENJI (JP)
YOSHIMURA NORIYUKI (JP)
YOSHIDA KENJI (JP)
International Classes:
H02K37/04; H02K37/14; (IPC1-7): H02K37/04
Foreign References:
| JPH0132748B2 | 1989-07-10 | |||
| JPS61185056A | 1986-08-18 | |||
| JPS60111382U | 1985-07-27 |
Other References:
See also references of EP 0634831A4
Download PDF: