Spin motor for a hard disk assembly
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United States of America Patent
Stats
-
Jun 8, 1993
Grant Date -
N/A
app pub date -
Dec 19, 1990
filing date -
Dec 19, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spin motor assembly of a disk drive apparatus includes a stator having a plurality of wound coils associated therewith, and a rotor having a plurality of magnetic poles. Each winding structure of the stator is made up of two winding portions, with only one winding portion being used to drive the rotor relative to the stator upon drive current being applied to the winding structure, but with both winding portions being used to generate back electromotive force when drive current is cut off from the winding structure. This generated electromotive force is used to actuate an actuator motor to unload the read-write heads from the disk surface. As an alternative, each winding structure of the stator is made of a single winding, and the winding structures are used successively to drive the rotor relative to the stator, but with at least two winding portions generating back electromotive force when drive current is cut off.
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Family
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Cited Art Landscape
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