High efficiency ballast system for gaseous discharge lamps

Details High efficiency ballast system for gaseous discharge lamps High efficiency ballast system for gaseous discharge lamps

1978-03-30

1980-01-22

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

315189, 315245, 315257, 315282, 315DIG5, H05B 4116, H05B 41232

Patent

active

041852338

ABSTRACT:
Electrical lamp ballast system for starting and operating fluorescent lamps with improved efficiency. System includes high leakage reactance autotransformer having primary and secondary windings, and a ballast capacitor connected in series with the secondary winding and two serially connected fluorescent lamps of low starting and operating voltage, the secondary circuit being connected to a tap on the primary winding for reducing the ratio of the ballast power input to the lamp light output. The system provides for reduced lamp current crest factor, thereby improving life and operating characteristics of the lamps.

REFERENCES:
patent: 2965799 (1960-12-01), Brooks et al.
patent: 2965808 (1960-12-01), Lovinger
patent: 3112428 (1963-11-01), Berger
patent: 3225255 (1965-12-01), Hume

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