Chopper ballast for gaseous discharge lamps with auxiliary capac

Details Chopper ballast for gaseous discharge lamps with auxiliary capac Chopper ballast for gaseous discharge lamps with auxiliary capac

1975-10-28

1977-08-16

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

315208, 315205, 315283, 315307, 315227R, H05B 4116, H05B 4124

Patent

active

040428567

ABSTRACT:
A single phase, high frequency chopper ballast without large magnetic and capacitive components for gaseous discharge lamps such as the Lucalox.sup.R lamp is operated on full wave rectified line voltage. A small auxiliary capacitor stores energy during the peaks of the rectified line voltage when the voltage is high enough to maintain lamp discharge. During the low voltage valley regions the auxiliary capacitor is discharged to supply augmented chopper input voltage or load circuit voltage and provide energy to maintain lamp ionization during the valley regions until the rectified line voltage rises to a usable level.

REFERENCES:
patent: 3265930 (1966-08-01), Powell, Jr.
patent: 3390275 (1968-06-01), Baker
patent: 3659147 (1972-04-01), Widmayer
patent: 3801867 (1974-04-01), West et al.
patent: 3836815 (1974-09-01), Herzog
patent: 3906243 (1975-09-01), Herzog
patent: 3913002 (1975-10-01), Steigerwald et al.
patent: 3921005 (1975-11-01), Watrous

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