Voltage feedforward control system for a spindle motor of a disk

Details Voltage feedforward control system for a spindle motor of a disk Voltage feedforward control system for a spindle motor of a disk

1997-11-18

1999-04-27

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318432, 318479, 369239, H02P 700

Patent

active

058982833

ABSTRACT:
A spindle motor of a disk drive is controlled in a switched voltage mode. A power bus supplies a voltage to the spindle motor. The power bus voltage is subject to variations while the spindle motor is being driven. An uncompensated motor voltage signal is modified to provide a compensated signal having a modified duty cycle. The modified duty cycle is inversely proportional to the variations in the power bus voltage. Commutation logic uses the compensated signal to generate commutation commands, which cause a power driver stage to energize the windings of the spindle motor.

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