Analog DC motor velocity control loop

Details Analog DC motor velocity control loop Analog DC motor velocity control loop

1978-11-16

1980-08-19

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318327, 318464, H02P 516

Patent

active

042186412

ABSTRACT:
A pulse width modulated DC motor control system is designed to operate a DC motor at constant velocity. Feedback pulses generated at a rate proportional to the rotational velocity of the motor are converted to control pulses having a fixed on-time period which is independent of changes in the velocity of the motor. The control pulses are used to modulate a constant current source whose output is integrated to generate a sawtooth voltage signal whose average DC value is used as the basis of or pulse width modulating a DC voltage applied to the motor drive circuits of a DC motor.

REFERENCES:
patent: 3241023 (1966-03-01), Eby
patent: 3409814 (1948-11-01), Azuma et al.
patent: 3531704 (1970-09-01), Uemura et al.
patent: 3596162 (1971-07-01), Takayama
patent: 3740633 (1973-06-01), Buttafauff
patent: 3753067 (1973-08-01), Milligan
patent: 4024445 (1977-05-01), Tokuda et al.

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