Floating Full Bridge Phase Shift Driving Circuit with Power Factor Corrected for External Electrode Fluorescent Lamps

• Main Authors: Chien-Liang Chen, 陳建良
• Other Authors: 陳秋麟
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/74225658499069841523

碩士 === 國立臺灣大學 === 電子工程學研究所 === 94 === The aim of this thesis is to study and implement a high power factor floating full-bridge phase-shifted pulse-width-modulation converter for driving the external electrode fluorescent lamps. A high power factor and high efficiency is easily achieved by using a boost power factor corrector in the front stage to produce a high output voltage for the inverter stage. To attain a high conversion efficiency of the inverter, the phase shift full bridge converter which can achieve zero voltage switching operations is used. The external electrode fluorescent lamps which can be directly paralleled with each other is adopted to reduce the quantity of inverters. The total performance is greatly improved as compared with the traditional two-stage driver, where the poor power factor, low efficiency, and unable to parallel lamps directly characteristics make it not suitable for paralleled lamps applications. The theoretical analysis is then verified by experiments on the implemented prototype.