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segunda-feira, 11 de fevereiro de 2013

單階功因修正線路 在發光二極體照明燈具應用之實現 THE IMPLEMENTATION OF SINGLE-STAGE PFC SCHEME FOR THE LED POWER LIGHT APPLICATION




單階功因修正線路
在發光二極體照明燈具應用之實現


THE IMPLEMENTATION OF SINGLE-STAGE PFC SCHEME
    FOR THE LED POWER LIGHT APPLICATION

研究生:鍾任富(Jen-Fu Chung)
指導教授:黃淑絹(Prof. Shu-Chuan Huang)

大同大學
電機工程研究所
    碩士論文
Thesis for Master of Science
Department of Electrical Engineering
Tatung University


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.

Index Terms: Boost Converter, Flyback converter, Single stage PFC.

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