DC Motor speed regulator

Details DC Motor speed regulator DC Motor speed regulator

1980-07-29

1982-05-04

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318459, H02P 516

Patent

active

043284477

ABSTRACT:
A speed regulating circuit which regulates motor speed without the use of a speed feedback signal by adjusting the magnitude of motor current so as to maintain a predetermined relationship between motor voltage and current. A function generator generates a current reference signal as a function of motor terminal voltage. The relationship between terminal voltage and motor current is established by curve fitting of the motor volt-amp family of curves for constant motor speeds. The current reference signal controls a motor current control circuit, preferably a time ratio or chopper circuit in order to adjust motor current and to regulate motor speed. A closed loop current control loop is associated with the chopper circuit for adjusting motor current to the current reference value.

REFERENCES:
patent: 2799819 (1957-07-01), Brown
patent: 3671385 (1972-06-01), McMenamy et al.
patent: 3708765 (1973-01-01), Salamon et al.
patent: 4119898 (1978-10-01), Morton et al.

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