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Development of an Electronic Ballast for 70W Ceramic Discharge Metal Halide Lamps with Step Down Converter  

김일권 (한국해양대학교)
길경석 (한국해양대학교)
김진모 ((주）태양전자)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.6, no.7, 2002 , pp. 1055-1061 More about this Journal
Abstract
This paper deals with a design and fabrication of an electronic ballast for 70[W] ceramic discharge metal halide lamps. The proposed ballast is composed of a rectifier, an active power factor correction circuit (PFC), a half-bridge inverter, a LC resonant circuit and a microprocessor. The developed ballast also includes a specially designed time circuit which provides reignition signal of lamps. Running frequency of the ballast is .jet at 40[kHz] to avoid acoustic-resonance and flickering. From the experimental results, input power factor and efficiency of the ballast are estimated 99.8[%] and 93.1[%], respectively.
Keywords
Electronic Ballast; Ceramic Discharge Metal Halide Lamp; Half-bridge Inverter; step Down convert;
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