Abstract：Active power factor corrected converters usually use an input filter capacitor to absorb the switching ripples and noises. The input filter capacitor current is very significant at the medium frequency(360～800Hz). The current of the input filter capacitor leads the input voltage by 90°, so that the power factor is very poor. At the same time the current loop introduces a leading phase at the medium frequency. This paper analyzes the effects of the DC input filter capacitor and the current loop and points out that the DC input filter capacitor is a very important cause of zero crossing distortion. On this base, the paper proposes a method to cancel the leading phase of the capacitor and the current loop, and to reduce the total harmonics distortion and make unity power factor approximately.
王少永, 张方华. 平均电流型Boost PFC变换器中过零畸变[J]. 电工技术学报, 2011, 26(2): 129-133.
Wang Shaoyong, Zhang Fanghua. Zero-Crossing Distortion in Single-Phase Boost PFC Converters Using Average Current Control. Transactions of China Electrotechnical Society, 2011, 26(2): 129-133.
[1] 王玉斌, 厉吉文, 田召广, 等. 一种新型的基于单周期控制的功率因数校正方法及实验研究[J]. 电工技术学报, 2007, 22(2): 138-143. [2] Sun Jian. Demystifying zero-crossing distortion in single-phase PFC converter[C]. Proceedings of IEEE PESC, 2002: 1109-1114. [3] Sun Jian. Analysis and design of single-phase PFC converters for airborne systems[C]. Proceedings of IEEE IECON, 2003: 1101-1109. [4] Sun Jian. On the zero-crossing distortion in single- phase PFC converters[J]. IEEE Transactions on Power Electronics, 2004, 19(3): 685-692. [5] Chen Min, Sun Jian. Feedforward current control of boost single-phase PFC converters[C]. Proceedings of IEEE APEC, 2004: 1187-1193. [6] Chen Min, Sun Jian. Feedforward current control of boost single-phase PFC converters[J]. IEEE Trans- actions on Power Electronics, 2006, 21(2): 338-345. [7] Konstantin P Louganski, Lai Jih Sheng. Current phase lead compensation in single-phase PFC boost converter with a reduced switching frequency to line frequency ratio[J]. IEEE Transactions on Power Electronics, 2007, 22(1): 113-119. [8] James P Noon , Dhaval Dalal. Practical design issues for PFC circuits[C]. Proceedings of IEEE APSC, 1997: 51-58. [9] 张卫平. 开关变换器的建模与控制[M]. 北京: 中国电力出版社, 2005. [10] Todd P C. UC3854 controlled power factor correction circuit design[C]. Unitrode Application Note U-134, 1999.
2011, Vol. 26 
