Frequency modulation method and device for high intensity...

Details Frequency modulation method and device for high intensity... Frequency modulation method and device for high intensity...

2011-05-17

2011-05-17

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Discharge control discharge device load

C315S247000, C315S2090SC, C315S224000, C315S291000

Reexamination Certificate

active

07944151

ABSTRACT:
An electronic control gear for a HID lamp receives an input signal for operating the lamp and frequency modulates the input signal to generate a frequency modulated output signal that drives an arc of the lamp. The frequency modulation of the output signal sweeps continuously between a low frequency modulation and a high frequency modulation, the low frequency modulation being a frequency f1in a range of 125 kHz to 150 kHz and the high frequency modulation being a frequency f2in a range of 230 kHz to 300 kHz, where f2-f1is at least 0.4*f1. A power amplifier changes an amplitude of the frequency modulated output signal during the low frequency modulations so that a current amplitude of the frequency modulated output signal is substantially constant, and a variable gain transformer adjusts a voltage of the frequency modulated output signal during starting of the lamp.

REFERENCES:
patent: 2429162 (1947-10-01), Keiser et al.
patent: 5121034 (1992-06-01), Allen et al.
patent: 5932976 (1999-08-01), Maheshwari et al.
patent: 6788007 (2004-09-01), Kramer
patent: 2005/0127847 (2005-06-01), Lin
patent: 2 038 571 (1980-07-01), None
Extended European Search Report for EP Application No. 05 79 8394, Complete Jul. 13, 2010, The Hague, pp. 1-7.

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