Structure of a flat-type brushless DC motor
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United States of America Patent
Stats
-
Jul 25, 1989
Grant Date -
N/A
app pub date -
Mar 10, 1988
filing date -
Mar 11, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flat type DC motor applicable for disc drive of an electronic still camera in which vibrations of the rotor axle are prevented without increasing manufacturing costs by providing the magnetic field between the stator and rotor to by asymmetrical so that the magnetic attracting force of the rotor to the stator is also asymmetrical. The asymmetrical attracting force causes the axle of the rotor to be urged in the same radial direction relative to the axle bearing in the stator, thus, movements of the axle in radial directions in the clearance between the axle and bearing of the stator are eliminated and the rotor rotates without vibrating.
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Cited Art Landscape
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