Abstract：The input current of DCM Boost PFC converter contains 3rd harmonic which has an initial phase difference of π with fundamental harmonic, this results in low PF and large electrolytic capacitor. Injecting appropriate 3rd harmonic which is in phase with fundamental component into the input current is proposed in the paper. The proposed method achieves storage capacitor reduction of 63% and 57% over the constant duty cycle control, when the harmonic specification of IEC 61000-3-2 Class D or Energy Star is met respectively. A method of fitting the duty cycle is further proposed for simplifying the circuit implementation. The experimental results from a 120W universal input prototype are given to verify the effectiveness of the proposed method.
姚凯, 阮新波, 冒小晶, 叶志红. 减小DCM Boost PFC变换器储能电容的方法[J]. 电工技术学报, 2012, 27(1): 172-181.
Yao Kai, Ruan Xinbo, Mao Xiaojing, Ye Zhihong. A Method of Reducing Storage Capacitor of DCM Boost PFC Converter. Transactions of China Electrotechnical Society, 2012, 27(1): 172-181.
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2012, Vol. 27 
