Wide range dimmable fluorescent lamp ballast system

Details Wide range dimmable fluorescent lamp ballast system Wide range dimmable fluorescent lamp ballast system

1991-06-10

1992-12-15

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315219, 315287, 315DIG4, H03B 3904

Patent

active

051720345

ABSTRACT:
The present invention and its related methods of operation provide a wide range dimmable high frequency lamp ballast system having a resonant circuit associated with each lamp or lamp set for providing a resonant frequency which is substantially higher than the drive frequency at which the lamp or lamp set is driven, and means for automatically selecting a drive frequency to be a submultiple of the resonant frequency of the resonant circuit, the selection of a submultiple being dependent on lamp operating conditions.

REFERENCES:
patent: 4259614 (1981-03-01), Kohler
patent: 4277728 (1981-07-01), Stevens
patent: 4544863 (1985-10-01), Hashimoto
patent: 4609850 (1986-09-01), Hanlet
patent: 4700113 (1987-10-01), Stupp
patent: 4775822 (1988-10-01), Statnic
patent: 4949016 (1990-08-01), De Bijl

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