Title:
FLAT TYPE MULTIIPOLE SYNCHRONOUS MOTOR
Document Type and Number:
Japanese Patent JPS54147409
Kind Code:
A
Abstract:
PURPOSE:To ensure stable rotation preventing cocking through slight deviation in the inner diameter of each circular magnetic pole with S and N in the direction opposite to the rotation in poles magnetized alternately. CONSTITUTION:A top magnetic blade 10 of a stator 1 is formed with broad magnetic pole pieces 11a to 11h and narrow magnetic pole pieces 12a to 12h alternately arranged, while a rotor 8 having a flat permanent magnet body 9 is arranged with body facing the blade 10. A magnetic pole 13A with the number of pole corresponding to the magnetic pole blade 10 is magnetized in a ring on the permanent magnet body 9 with the inner diameter 13A of the respetive magnetic poles slightly deviated in the direction opposite to the rotation of the rotor 8. Therefore, the inner diameter 13A works as a magnetic brake accompanying torque generating section of the magnetic pole 13A thereby checking cocking and assuring a stable rotation without hunting.
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Inventors:
HIRAI TOSHIHISA
SUZUKI YASUO
SUZUKI YASUO
Application Number:
JP5550278A
Publication Date:
November 17, 1979
Filing Date:
May 12, 1978
Export Citation:
Assignee:
MATSUSHITA ELECTRIC WORKS LTD
International Classes:
H02K21/24; (IPC1-7): H02K21/24