Simplified spindle motor for disc drive

Details Simplified spindle motor for disc drive Simplified spindle motor for disc drive

1990-08-15

1991-10-15

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310193, 310254, 310261, H02K 100, H02K 318, H02K 1926, H02K 112

Patent

active

050577310

ABSTRACT:
A dynamoelectric machine intended for use as a three-phase spindle motor in a computer disc drive. The motor includes a stator having nine poles, only six being provided with coils. A rotor has eight permanent magnet poles that coaxially surround in operative relation the nine poles. The six windings are connected to define three discrete electrical phases.

REFERENCES:
patent: 3978356 (1976-08-01), Spiesberger
patent: 4190779 (1980-02-01), Schaeffer
patent: 4315171 (1982-02-01), Schaeffer
patent: 4424463 (1984-01-01), Musil
patent: 4683391 (1987-07-01), Higuchi
patent: 4754207 (1988-06-01), Heidelberg et al.
patent: 4758752 (1988-07-01), Leenhouts
patent: 4774428 (1988-09-01), Konecny
patent: 4833355 (1989-05-01), Kawashima
patent: 4883999 (1989-11-01), Hendershot

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