Title :
Low-frequency sine wave modulation of 250 W high-frequency metal halide lamp ballasts
Author :
Wang, Jianqiang ; Xu, Dianguo ; Yang, Hua
Author_Institution :
Dept. of Electr. Eng., Harbin Inst. of Technol., China
Abstract :
In 40-60 kHz, the acoustic resonance band of 250 W metal halide (MH) lamps is studied. The theoretical prediction and experimental observation shows no same bands in which various MH lamps can operate stably. But the injection of approximate low-frequency sine wave modulation is effective method for eliminating acoustic resonance if the center operating frequency of electronic ballast is beyond 47 kHz. Experimental results of ballast prototype support the proposed approach.
Keywords :
acoustic resonance; discharge lamps; lamp accessories; modulation; 250 W; 40 to 60 kHz; acoustic resonance elimination; electronic ballast; high-frequency metal halide lamp ballasts; low-frequency sine wave modulation; Acoustic waves; Circuits; Electronic ballasts; Frequency estimation; Gases; IEEE members; Lamps; Prototypes; Resonance light scattering; Resonant frequency;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2004. APEC '04. Nineteenth Annual IEEE
Print_ISBN :
0-7803-8269-2
DOI :
10.1109/APEC.2004.1295945
