Servo motor control circuit

Details Servo motor control circuit Servo motor control circuit

1994-12-30

1996-11-12

Cabeca, John W.

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318608, 318601, G05B 102

Patent

active

055743498

ABSTRACT:
A servo motor control circuit for a video signal playback apparatus including a wave-shaping circuit, a speed error detector, a first filtering circuit for filtering torque ripple components of servo motor speed error signals characterized in that the gain in much higher in a low frequency band than in any other frequency band, a second filtering circuit for attenuating the low frequency gain of signals output from the first filtering circuit, a phase error detector, an adder, and a motor controller, resulting in a decrease in low frequency band phase distortion and a decrease in the time required for servo motor stabilization.

REFERENCES:
patent: 4243921 (1981-01-01), Tamura et al.
patent: 4353016 (1982-10-01), Born
patent: 4567409 (1986-01-01), Ogawa
patent: 5023924 (1991-06-01), Tajima et al.
patent: 5303093 (1994-04-01), Kawasaki
patent: 5304908 (1994-04-01), Oh
patent: 5321342 (1994-06-01), Kruse

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