Low noise spin motor for use in disk drive

Details Low noise spin motor for use in disk drive Low noise spin motor for use in disk drive

1990-06-01

1993-12-28

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 51, 360 9908, 384544, H02K 516, H02K 708

Patent

active

052742881

ABSTRACT:
A low noise spin motor for use in a disk drive includes two bearings having different inside diameters, different outside diameters, and preferably the same size balls. The balls in the larger bearing travel at a faster speed thereby increasing the noise frequencies and resonant frequency as compared to the smaller frequency whereby the noise from the two bearings is not compounded. A small and compact disk drive using the spin motor is described.

REFERENCES:
patent: 4628384 (1986-12-01), Raj et al.
patent: 4777549 (1988-10-01), Dushkes et al.
patent: 4814914 (1989-03-01), Hagiwara et al.
patent: 4818907 (1989-04-01), Shirotori
patent: 4979056 (1990-12-01), Squires et al.

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