Structure of a flat-type brushless DC motor

Details Structure of a flat-type brushless DC motor Structure of a flat-type brushless DC motor

1988-03-10

1989-07-25

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 51, 310 90, 310156, 310268, H02K 112

Patent

active

048517313

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.

REFERENCES:
patent: Re26749 (1970-01-01), Montagu
patent: 3624574 (1971-11-01), Montagu
patent: 4135119 (1979-01-01), Brosens
patent: 4181867 (1980-01-01), Muller
patent: 4647803 (1987-03-01), von der Heide
patent: 4755698 (1988-07-01), Frister
patent: 4757222 (1988-07-01), Shiraki

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