Solid state electronic ballast system for fluorescent lamps

Details Solid state electronic ballast system for fluorescent lamps Solid state electronic ballast system for fluorescent lamps

1991-12-30

1993-06-08

Mis, David

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

With power factor control device

315209R, 315224, 315307, 315DIG5, H05B 4129, H05B 4136

Patent

active

052182720

ABSTRACT:
A high power factor ballast circuit for use with fluorescent lamps consisting of a power factor correcting inductor periodically saturated to store pulses of direct current energy and periodically discharge same at a regular periodic rate to power the fluorescent lamp. A bistable flip-flop circuit and an associated solid state switching device combine to periodically control the saturation and discharge of the inductor.

REFERENCES:
patent: 4894587 (1990-01-01), Jungreis et al.
patent: 5049790 (1991-09-01), Herfurth et al.

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