Disk drive motor

Details Disk drive motor Disk drive motor

1990-11-05

1992-06-23

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

318254, 310268, H02K 1100, H02K 122, H02P 506, H02P 706

Patent

active

051246040

ABSTRACT:
An axial gap motor for use in a disk drive includes a rotatable magnet rotor and fixed first and second windings closely spaced from the rotor. The rotor and windings are disposed coaxially about a rotatable spindle to which the rotor is mounted. Current supplied to one winding actuates the rotor to rotate in a run mode. Current supplied to the other winding positions the rotor for maximum torque for starting the motor, and enables the sensing of the speed of the rotating rotor.

REFERENCES:
patent: 3569753 (1971-03-01), Babikayan
patent: 3906267 (1974-05-01), Coupin et al.
patent: 4336475 (1982-06-01), Morinaga et al.
patent: 4455513 (1984-06-01), Fulton et al.
patent: 4484114 (1984-11-01), Ebbs
patent: 4531079 (1985-07-01), Muller
patent: 4673849 (1987-06-01), Sears et al.
patent: 4717994 (1988-01-01), Diaz et al.
patent: 4779165 (1988-10-01), Elsaesser et al.
patent: 4837474 (1989-06-01), Petersen et al.
patent: 4902923 (1990-02-01), Okauchi

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