Device for speed stabilization of a motor employing phase compar

Details Device for speed stabilization of a motor employing phase compar Device for speed stabilization of a motor employing phase compar

1993-06-24

1994-12-20

Shoop, Jr., William M.

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Armature control by digital or combined analog and digital...

388813, 388901, 388906, 388911, 388915, 318609, 318610, H02P 5165

Patent

active

053751868

ABSTRACT:
An apparatus for stabilizing the speed of a motor has a phase comparator that identifies a phase difference between a reference signal and a speed signal. The apparatus acquires the speed of the motor and generates an output signal proportional to the identified phase difference. A controller receives the output signal. A control circuit for the motor is connected to the controller. The phase comparator comprises a sample-and-hold element, a sampling pulse shaper that is connected thereto and is input with the speed signal, a pulse shaper input with the reference signal, and a signal generator connected to the output of the pulse shaper and to the input of the sample-and-hold element.

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Patent Abstracts of Japan, vol. 4, No. 86, Jun. 20, 1980, "Speed Adjustment Unit", Tadashi Saitou.
Patent Abstracts of Japan, vol. 11, No. 373, Dec. 5, 1981, "Digital Phase Comparison Method", Yoshiro Tsuchiyama.

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