Input-Current Distortion of CCM Boost PFC Converters Operated in DCM

When power-factor correction (PFC) converters designed for operation in continuous-conduction mode (CCM) at full power are operated at reduced load, operation in discontinuous-conduction mode (DCM) occurs in a zone that is close to the crossover of the line voltage. This zone will gradually expand with decreasing load to finally encompass the entire line cycle. Whereas, in CCM, the parasitic capacitances of the switches only cause switching losses, in DCM, they are a source of converter instability, resulting in significant input-current distortion. In this paper, this source of input-current distortion is analyzed, and a solution is proposed. Experimental results are obtained using a digitally controlled boost PFC converter, which is designed to operate in CCM for 1 kW

[1]  Jose A. Cobos,et al.  Voltage-follower control in zero-current-switched quasi-resonant power factor preregulators , 1995 .

[2]  José Luiz de Freitas Vieira,et al.  Modeling of the high-power-factor discontinuous boost rectifiers , 1999, IEEE Trans. Ind. Electron..

[3]  Simone Buso,et al.  Simple digital control improving dynamic performance of power factor preregulators , 1997 .

[4]  G. K. Dubey,et al.  Mixed-mode operation of boost switch-mode rectifier for wide range of load variations , 2002 .

[5]  Jan Melkebeek,et al.  Duty-ratio feedforward for digitally controlled boost PFC converters , 2003 .

[6]  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.

[7]  Jian Sun,et al.  Averaged modeling of PWM converters operating in discontinuous conduction mode , 2001 .

[8]  George C. Verghese,et al.  An adaptive digital controller for a unity power factor converter , 1996 .

[9]  Jose A. Cobos,et al.  The determination of the boundaries between continuous and discontinuous conduction modes in PWM DC-to-DC converters used as power factor preregulators , 1992 .

[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]  Javier Uceda,et al.  The discontinuous conduction mode Sepic and Cuk power factor preregulators: analysis and design , 1997, IEEE Trans. Ind. Electron..

[12]  V. Vorperian.  Simplified analysis of PWM converters using model of PWM switch. II. Discontinuous conduction mode , 1990 .

[13]  D.M. Van de Sype,et al.  A sampling algorithm for digitally controlled boost PFC converters , 2004, IEEE Transactions on Power Electronics.

[14]  K. Natarajan,et al.  Control of power factor correcting boost converter without instantaneous measurement of input current , 1995 .

[15]  J.A. Melkebeek,et al.  Sample correction for digitally controlled boost PFC converters operating in both CCM and DCM , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..