Stepper motor valve actuator control apparatus

Details Stepper motor valve actuator control apparatus Stepper motor valve actuator control apparatus

1976-06-16

1978-04-11

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318207R, 13759617, G05B 1128

Patent

active

040841200

ABSTRACT:
An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A control circuit is responsive to pulsed drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. The control circuit includes a switching device which applies a DC voltage to the motor windings to hold the valve position when it is not being driven.

REFERENCES:
patent: 3444448 (1969-05-01), Welch
patent: 3522502 (1970-08-01), Tuchen
patent: 3800201 (1974-03-01), Gaul et al.
patent: 3997826 (1976-12-01), Mayer

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