Motor control circuit which reduces the speed control gain and d

Details Motor control circuit which reduces the speed control gain and d Motor control circuit which reduces the speed control gain and d

1996-04-25

1998-03-10

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 7308, 360 7309, 318608, G11B 1552

Patent

active

057268223

ABSTRACT:
A motor control circuit generates a signal representing a rotation frequency of a motor. It produces a motor speed error signal based on the rotation frequency. The error signal is changed by a speed gain circuit and supplied to the motor driving circuit through a filter. The filter is for preventing an oscillation in a servo loop. When the motor speed is out of a predetermined range, a gain of the speed error signal is reduced and the filter is disabled.

REFERENCES:
patent: 4037260 (1977-07-01), Busby, Jr. et al.
patent: 5313343 (1994-05-01), Yatomi
patent: 5548455 (1996-08-01), Sato
patent: 5604648 (1997-02-01), Oh

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