High efficiency ballast system for gaseous discharge lamps
Number of patents in Portfolio can not be more than 2000
United States of America
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Aug 13, 1985
Grant Date -
N/A
app pub date -
Nov 8, 1982
filing date -
Mar 30, 1978
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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