Electrically operated actuator having a capacitor storing...

Details Electrically operated actuator having a capacitor storing... Electrically operated actuator having a capacitor storing...

H - Electricity

01

H

H01H 3/26 (2006.01) G05F 1/613 (2006.01) H02H 7/09 (2006.01) H02J 9/06 (2006.01) H02P 7/00 (2006.01)

Patent

CA 2146413

An electrically operated actuator stores power in a capacitor for returning the actuator output element to a preselected position upon power failure. The actuator has a controller having input power terminals connected across the capacitor and control terminals for controlling the power applied from the input power terminals to the motor which comprises the actuator's prime mover. A sensor monitors the presence of power provided to the controller's input power terminals. When failure of this power is sensed, the capacitor current flows to the controller, and the sensor applies signals to an override circuit of the controller causing the controller to apply current from the capacitor to the actuator motor in a way which drives the actuator toward the preselected position. A properly selected capacitor is capable of supplying adequate current over a period of time sufficient to return the actuator to the preselected position.

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