Electric motor for driving magnetic disk

Details Electric motor for driving magnetic disk Electric motor for driving magnetic disk

1996-02-26

1997-01-28

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 90, 310 68R, 310157, 310 88, 310266, H02K 700

Patent

active

055980473

ABSTRACT:
A cylindrical shielding plate is provided on an inner circumference of the cylindrical recess formed on the bracket of an electric motor of a magnetic disk drive, and an open sector of the stator core is arranged to coincide with the moving direction of read/write head. Or a cylindrical boss is inserted between the stationary shaft and the stator core. Thereby, high frequency electromagnetic noise to the magnetic disk is drastically reduced.

REFERENCES:
patent: 4724346 (1988-02-01), Klein
patent: 4827168 (1989-05-01), Nakajima
patent: 4928029 (1990-05-01), Wright
patent: 4987329 (1991-01-01), Schmidt
patent: 4996613 (1991-02-01), Hishida
patent: 5138209 (1992-08-01), Chuta
patent: 5256922 (1993-10-01), Tanaka
patent: 5381066 (1995-01-01), Miyaji et al.
patent: 5396134 (1995-03-01), Mockizuki

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