Speed control circuit

Details Speed control circuit Speed control circuit

1979-01-29

1980-07-08

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318318, 318327, H02P 516

Patent

active

042119642

ABSTRACT:
This invention relates to a speed control circuit of a d.c. motor having a frequency generator. To the conventional method in which a rotation detection signal is delayed by a monostable multivibrator circuit and this delayed signal and the rotation detection signal are gated to obtain a speed error signal, a new time-voltage converter circuit is added, whereby even if the detected frequency of the generator is low, a stable speed control is possible. Because of no error synchronization, the present speed control circuit is suited to an apparatus which requires speed switching, and also to semiconductor integration.

REFERENCES:
patent: 3586946 (1971-06-01), Sadashige et al.
patent: 3657624 (1972-04-01), Nagano
patent: 3952237 (1976-04-01), Kimizuka
patent: 4081728 (1978-03-01), Nikami et al.
patent: 4109184 (1978-08-01), Weber

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