Power control circuit for improved power application and control

Details Power control circuit for improved power application and control Power control circuit for improved power application and control

1995-03-10

1996-06-18

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

318800, H02M 542, H02P 534

Patent

active

055284850

ABSTRACT:
A power supply and power control circuit for providing a variable and controlled DC voltage to a DC load. The circuit includes an electrical power source; a rectifying device to provide rectified alternating current from the electrical power source; a comparator device; circuitry for providing a predetermined voltage to the inverting input of the comparator device derived from the rectified alternating current; a sensor device to monitor a sensed value associated with the DC load; circuitry for providing an adjustable DC voltage to the non-inverting input of the comparator; a programmable control device to receive an output from the sensor device and provide an output to the circuitry for providing an adjustable DC voltage; a switching device connected between the DC load and the rectified alternating current; and control circuitry which is coupled between the switching device and the output of the comparator device and is controlled by the output of the comparator device. The control circuitry activates and deactivates the switching device to apply power to the DC load when the sensed value of the DC load is different than the desired set point value to maintain the sensed value at the desired set point with minimum variations therefrom.

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