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URN etd-0818110-152608 Statistics This thesis had been viewed 4124 times. Download 1526 times. Author Jen-fu Chung Author's Email Address email@example.com Department Electrical Engineering Year 2009 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 128 Title THE IMPLEMENTATION OF SINGLE-STAGE PFC SCHEME FOR THE LED POWER LIGHT APPLICATION Keyword Boost Converter Flyback Converter Single stage PFC Single stage PFC Flyback Converter Boost Converter Abstract This thesis mainly presents an implementation of a single-stage Power Factor Correction (PFC) scheme for the low power LED light application. As mater of fact, the circuit key idea is from the definition of power factor, that is the input current must follow the voltage all the time. The PF value is predicted and set properly by the proposed design equations and circuit architecture. Detail operation principles, algorithms, and experimental results are offered, and the experimental results based on 24V 700mA LED down light prototype schematic are also provided. The final PF value reaches as high as 0.980 which already satisfied the "ENERGY STAR": PF>0.9 for commercial application. In addition, the current harmonics were passed in IEC61000-3-2, too. Advisor Committee Shu-chuan Huang - advisor
Files Date of Defense 2010-07-29 Date of Submission 2010-08-23