Electricity: power supply or regulation systems – Output level responsive – Phase controlled switching using electronic tube or a three...
Patent
1998-12-11
1999-11-30
Berhane, Adolf Deneke
Electricity: power supply or regulation systems
Output level responsive
Phase controlled switching using electronic tube or a three...
323320, G05F 140
Patent
active
059948833
ABSTRACT:
An alternating current power control device for controlling the amount of power energy supplied to an electric load by controlling the cycle numbers of an alternating current power source in a predetermined cycle period is disclosed. The control device includes a voltage zero-crossing detecting circuit, a current detector, a power adjusting circuit, a control unit, an output driving circuit, and a switching circuit. The switching circuit is connected in series between the alternating current power source and the load. The control unit generates a control signal to control the switching circuit according to a voltage counting pulses generated by the voltage zero-crossing detecting circuit, a current counting pulse generated by the current detector, and a power adjusting signal generated by the power adjusting circuit to determine the cycle numbers of the alternating current power source supplied to the load.
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