Phase locked loop motor speed control

Details Phase locked loop motor speed control Phase locked loop motor speed control

1980-03-25

1981-12-22

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318318, 318341, H02P 516

Patent

active

043073247

ABSTRACT:
A precision motor speed control system employing a phase locked loop in which the inertial mass of the motor, its tachometer and motor driven devices, such as fly wheels, tape transports, etc., perform the functions of the usual low pass filter and voltage control oscillator.

REFERENCES:
patent: 3176208 (1965-03-01), Gifft
patent: 3487367 (1969-12-01), Sklaroff
patent: 3493834 (1970-02-01), Worrall
patent: 3628114 (1971-12-01), Pattantyus
patent: 4155033 (1979-05-01), DeBell et al.
Smithgall, D. H., "A Phase-Locked Loop Motor Control System", IEEE Transactions on Industrial & Control Instrumentation, vol. IEC122, No. 4, 11-75.

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