Speed and phase controller for motor and video cassette recorder

Details Speed and phase controller for motor and video cassette recorder Speed and phase controller for motor and video cassette recorder

1995-12-01

1999-08-24

Sircus, Brian

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318615, 318619, 318638, G05B 1300

Patent

active

059428686

ABSTRACT:
A speed and phase controller for a motor includes detecting and servo system for detecting a speed and a phase of the motor and for outputting a speed and phase control signal corresponding to the detected speed and phase of the motor, load detector for detecting a load on the motor and for outputting a determination value corresponding to the detected load on the motor, gain controller for variable-amplifying the speed and phase control signal of the detector and servo system according to the determination value of the load detector, motor driving controller for outputting a driving control signal according to the variable-amplified speed and phase control signal, and a motor driver for driving the motor according to the driving control signal of the motor driving controller.

REFERENCES:
patent: 4501343 (1985-02-01), Salihi
patent: 4617635 (1986-10-01), Shimizu
patent: 4651067 (1987-03-01), Ito et al.
patent: 4839573 (1989-06-01), Wise
patent: 4843292 (1989-06-01), Ono et al.
patent: 4902949 (1990-02-01), Hirata
patent: 5001407 (1991-03-01), Suzuki et al.
patent: 5298841 (1994-03-01), Katayama et al.
patent: 5391969 (1995-02-01), Tabuchi
patent: 5436545 (1995-07-01), Bahr et al.
patent: 5475291 (1995-12-01), Yoshida et al.
patent: 5548679 (1996-08-01), Kiyota

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