Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1997-10-02
1999-09-14
Wong, Don
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315291, 315224, 315151, G05F 100
Patent
active
059527943
ABSTRACT:
A method and circuit for detecting arc instabilities in a high pressure gas discharge lamp. The method and circuit rectify and low pass filter the lamp voltage to obtain a quasi-rms voltage having recurrent periods with first zones containing spurious noise from switching of inverter switches and broad second zones, between the first zones, which are substantially free of spurious noise. The quasi-rms voltage is sampled only during the second zones, so that the samples have a high information-to-noise ratio. The sample signal may be used in a variety of methods to detect and control arc instabilities in gas discharge lamps.
REFERENCES:
patent: 3904922 (1975-09-01), Webb et al.
patent: 5481162 (1996-01-01), Boenigk et al.
patent: 5485061 (1996-01-01), Utika et al.
patent: 5569984 (1996-10-01), Holtslag
patent: 5663613 (1997-09-01), Yamashita et al.
patent: 5710488 (1998-01-01), Nilssen
patent: 5859505 (1999-01-01), Bergman et al.
"An Autotracking System for Stable Hf Operation of HID Lamps", F. Bernitz, Symp. Light Sources, Karlsrihe, 1986.
"Acoustic Resonances in Cylindrical High-Pressure Arc Discharges", by H.L. Witting, J. Appl. Phys. 49(5), May 1978, pp. 2680-2683.
Journal of the Ulluminating Engineering Society, Summer, 1991, pp. 95-96.
"Acoustic Resonance Phenomena in Low Wattage Metal Halide Lamps", by J.M. Davenport et al, Journal of IES, Apr. 1985, pp. 633-641.
"Study of HID Lamps With Reduced Acoustic Resonances", by S. Wada et al, Journal of the Illuminating Engineering Society, Winter, 1987, pp. 166-174.
"Acoustic Resonances in High Frequency Operated Low Wattage Metal Halide Lamps", by J.W. Denneman, Philips Journal of Research, vol. 38, Nos. 4/5, 1983, pp. 263-272.
Bergman Anthonie H.
Huynh Phuong T.
Lee Wilson
Phillips Electronics North America Corportion
Wieghaus Brian J.
Wong Don
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