Design and Implementation of a DSP Based Electronic Ballast for Dual Xenon Headlight Lamps

• Main Authors: Shi-Heng Hong, 洪士恆
• Other Authors: Ray-Lee Lin
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/41066138002561828622

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 95 === This thesis presents a novel electronic ballast to drive dual Xenon headlight lamps. Two flyback converters are used to provide the lamp power from the warm-up period to the steady state. A common-leg bridge inverter is used to drive the two lamps with a low- frequency square-wave to eliminate the acoustic resonance from operation. The lamps are driven with negative lamp voltage to increase lamp life. Also, the electronic ballast is controlled by a micro control unit (MCU). The start-up sequences and constant lamp power control of the lamps are achieved by the digital signal processor (DSP). The transition state and steady state of a lamp are described in this thesis. Finally, a laboratory prototype of a 35W D1 automotive electronic ballast has been implemented to verify its feasibility.