Power saving circuitry

Details Power saving circuitry Power saving circuitry

1987-10-14

1995-10-03

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315208, 315224, 315158, 315194, 323223, 323235, 323320, H05B 3702

Patent

active

054554918

ABSTRACT:
Power saving circuitry is provided for use with fluorescent lights, inductive loads and resistive loads. The circuitry comprises a power circuit connectable to an alternating circuit power supply and a control circuit. The power circuit includes a bilateral switch, and the control circuit includes means for timing the operation of the bilateral switch so that the switch conducts current for a predetermined time during each half-cycle of the power supply which terminates at a predetermined interval before the end of each half cycle. A preferred embodiment of the power saving circuitry, adapted for use with fluorescent lights or inductive loads such as electrical motors, also comprises a Back-EMF suppressor circuit. The bilateral switches are preferably made up of one or more unilateral switch devices such as field effect transistors. The subject circuitry reduces power consumption while at the same time providing for a power factor correction.

REFERENCES:
patent: 4082981 (1978-04-01), Morton et al.
patent: 4099099 (1978-07-01), Grudelbach
patent: 4287455 (1981-09-01), Drieu
patent: 4350935 (1982-09-01), Spira et al.
patent: 4482844 (1984-11-01), Schweer et al.
patent: 4528482 (1985-07-01), Merlo
patent: 4544863 (1985-10-01), Hashimoto
patent: 4567425 (1986-01-01), Bloomer
patent: 4633161 (1986-12-01), Callahan et al.

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