Ballast power supply

Details Ballast power supply Ballast power supply

2007-12-25

2007-12-25

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S308000, C315SDIG002, C315S224000

Reexamination Certificate

active

11202614

ABSTRACT:
A high frequency ballast power supply for a high intensity discharge lamp includes a variable frequency voltage generating circuit for producing a regulated cyclical voltage. After ignition of the lamp, the variable frequency voltage generating circuit operates to vary the frequency of the cyclical voltage over the range of frequencies with a maximum frequency of less than or equal to about 375 kHz. A resonant circuit for regulating the power supplied to the lamp is interposed between the variable frequency voltage generating circuit and the lamp.

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