A digital leading phase current reduction (LPCR) technique for CCM boost PFC in light load conditions

This paper proposes a leading phase current reduction (LPCR) technique in a continuous conduction mode (CCM) boost power factor correction (PFC) for light load power factor (PF) improvement. The proposed LPCR technique provides the corrected average inductor current reference and the modified duty ratio feed-forward (MDFF) technique which can cancel the effect of the phase lead currents resulting from the EMI filter and input capacitor. Moreover, the proposed LPCR also provides the optimal dead-zone from the corrected current reference and MDFF. Therefore, the proposed LPCR can improve the power quality and efficiency not only in high AC line voltage range but also in extreme light load conditions. The principle and analysis of the proposed LPCR are presented, and the performance and feasibility are verified by experimental results from 230 Vrms input and 750 W-400 V output laboratory prototype.

[1]  J. B. Williams,et al.  Design of feedback loop in unity power factor AC to DC converter , 1989, 20th Annual IEEE Power Electronics Specialists Conference.

[2]  Jong-Woo Kim,et al.  A Simple Switching Control Technique for Improving Light Load Efficiency in a Phase-Shifted Full-Bridge Converter with a Server Power System , 2014, IEEE Transactions on Power Electronics.

[3]  J.A. Melkebeek,et al.  Input current distortion of CCM boost PFC converters operated in DCM , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[4]  Byoung-Kuk Lee,et al.  Comparative Performance Analysis of High Density and Efficiency PFC Topologies , 2014, IEEE Transactions on Power Electronics.

[5]  D. Maksimovic,et al.  Impact of digital control in power electronics , 2004, 2004 Proceedings of the 16th International Symposium on Power Semiconductor Devices and ICs.

[6]  Robert W. Erickson,et al.  Fundamentals of Power Electronics , 2001 .

[7]  T. Friedli,et al.  Electromagnetic Modeling of EMI Input Filters , 2012, 2012 7th International Conference on Integrated Power Electronics Systems (CIPS).

[8]  Shu Fan Lim,et al.  A simple digital DCM control scheme for boost PFC operating in both CCM and DCM , 2010 .

[9]  D.M. Van de Sype,et al.  Design issues for digital control of boost power factor correction converters , 2002, Industrial Electronics, 2002. ISIE 2002. Proceedings of the 2002 IEEE International Symposium on.

[10]  Jan A. Melkebeek,et al.  Digitally controlled boost power-factor-correction converters operating in both continuous and discontinuous conduction mode , 2005, IEEE Transactions on Industrial Electronics.

[11]  Jih-Sheng Lai,et al.  Admittance Compensation in Current Loop Control for a Grid-Tie LCL Fuel Cell Inverter , 2008 .

[12]  Sung-Yeul Park,et al.  Input impedance and current feedforward control for leading-lagging phase admittance cancellation in the AC-DC boost converter , 2013, 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[13]  Jih-Sheng Lai,et al.  Current Phase Lead Compensation in Single-Phase PFC Boost Converters With a Reduced Switching Frequency to Line Frequency Ratio , 2007 .

[14]  J.R. Pinheiro,et al.  Digital control system applied to a PFC boost converter operating in mixed conduction mode , 2009, 2009 Brazilian Power Electronics Conference.

[15]  Jian Sun.  Demystifying zero-crossing distortion in single-phase PFC converters , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[16]  Jian Sun,et al.  On the Zero-Crossing Distortion in Single-Phase PFC Converters , 2004 .

[17]  Wan-Rone Liou,et al.  Design and implementation of a boost power factor correction stage operated in mixed-conduction mode , 2011, 2011 International Conference on Electric Information and Control Engineering.

[18]  Ki-Bum Park,et al.  On/Off Control of Boost PFC Converters to Improve Light-Load Efficiency in Paralleled Power Supply Units for Servers , 2014, IEEE Transactions on Industrial Electronics.