Realization study of Dimmer-Controlled Electronic Ballast with soft-starting technique

• Main Authors: Soun, Yu-An, 孫永安
• Other Authors: Hsieh Guan-Chyun
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/00611781642964295162

碩士 === 國立台灣工業技術學院 === 電子工程技術研究所 === 85 === This thesis proposes the realization study of the dimmer- controlled electronic ballast with soft-starting control. The characteristic of the fluorescent lamp operating in high- frequency range is explored. The fluorescent lamp is actually an impedance consisting of resistance and capacitance when operates in the high-frequency. The lamp impedance is seriously dependent on the lamp current, the operating frequency, and the lamp voltage. Additionally, a novel soft-starting strategy for smoothly igniting the fluorescent lamp is proposed. A half- bridge series-resonant inverter (HB-SRI) is employed to configure the ballast system. A soft-starting controller(SSC) is presented to preheat the filament of the lamp, which leads to reduce the lamp starting voltage. Mathematical model for description the lamp before and after firing is made. A design example of realizing a 80W ballast is conducted. Experimental result shows quite the same as the simulation one and is close to the theoretical prediction.