Single ballast for powering plural high intensity discharge lamp

Details Single ballast for powering plural high intensity discharge lamp Single ballast for powering plural high intensity discharge lamp

1997-05-22

1999-11-16

Wong, Don

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315208, 315247, 315289, 315323, H05B 4116

Patent

active

059864125

ABSTRACT:
A ballast circuit for a plurality of serially connected, high pressure gas discharge lamps comprises an electromagnetic ballast arrangement receptive of an input power signal, providing an output ballast voltage for driving the plurality of lamps, and providing an open circuit ballast voltage when the lamps are disconnected from the arrangement. A first ignitor circuit is connected between the ballast arrangement and the first lamp, and produces at least one ignitor pulse of high voltage and high frequency compared to the open circuit ballast voltage, to initiate starting of the first lamp. A second ignitor circuit is connected between the first lamp and a second lamp so as to be supplied with current through the first lamp. The second circuit produces at least one ignitor pulse of high voltage and high frequency compared to the open circuit ballast voltage after the first lamp begins to start and drops substantially in impedance, to initiate starting of the second lamp.

REFERENCES:
patent: 4006384 (1977-02-01), Elms et al.
patent: 4145638 (1979-03-01), Kaneda
patent: 5017840 (1991-05-01), Droho
patent: 5608296 (1997-03-01), Brown
"Gemini: A Tandem Ballast Metal Halide Lighting System by GE Lighting Systems," General Electric Company, brochure OLP-2588D, Aug. 1996, two pages.
"Wiring Diagram No. 35-406685R2," General Electric Company, 1995, one page.
"Wiring Diagram No. 35-406257R3," General Electric Company, 1995, one page.

Affiliated with

Also associated with

Rating

Single ballast for powering plural high intensity discharge lamp does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single ballast for powering plural high intensity discharge lamp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single ballast for powering plural high intensity discharge lamp will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1328697