Frequency modulated ballast with loosely coupled transformer for parallel gas discharge lamp control
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United States of America Patent
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-
Jan 30, 2001
Grant Date -
N/A
app pub date -
Sep 30, 1998
filing date -
Dec 2, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A frequency dependent controller utilizes a loosely coupled transformer, adapted to change the operating characteristics of the transformer by varying its operating frequency in accordance with the requirements of a load to be supplied with power. The controller is particularly adapted for dimming and adjustably controlling a set of gas discharge lamps such as fluorescent lamps, connected in parallel such that failure of one lamp does not affect operation of the other lamps in the set.
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