Apparatus having source power control unit responsive to voltage

Details Apparatus having source power control unit responsive to voltage Apparatus having source power control unit responsive to voltage

1995-03-27

1997-06-10

Envall, Jr., Roy N.

Boots, shoes, and leggings

361 78, 360 81, 318 3, 395750, G06F 100, G11B 552, H02P 768

Patent

active

056383070

ABSTRACT:
A disk apparatus wherein a disk is rotated by a rotating motor, and a source power supplied to the rotating motor is monitored, which includes: a memory unit for storing an initial source voltage value before a process of a rotating motor acceleration is started; a detecting unit for periodically detecting a source voltage value related to the source power; a comparing unit for comparing the source voltage value, detected by the detecting unit during the process of the rotating motor acceleration, with the initial source voltage value stored in the memory unit, and for outputting a voltage fluctuation indicated by a difference between the source voltage value and the initial source voltage value; and a control unit for setting a quantity of the source power supplied to the rotating motor, to a smaller quantity in response to the voltage fluctuation output by the comparing unit.

REFERENCES:
patent: 4864287 (1989-09-01), Kievstead
patent: 5481733 (1996-01-01), Douglis et al.
patent: 5493670 (1996-02-01), Douglis et al.

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