Bridgeless Power Factor Correction Converter Working at High Load Variations

The conventional boost power factor correction converter has high conduction losses because of the input rectifier. The use of a bridgeless PFC circuit offers high efficiency. For high powers, the bridgeless circuit will be designed to work in continuous conduction mode (CCM), using an average current mode control. The switches have parasitic capacitances that in CCM lead to switch losses, without influencing the waveform of the converters. For low loads, the discontinuous conduction mode (DCM) appears, but the parasitic capacitances lead to the input current distorsion. This paper focuses on the simulation and analysis of bridgeless PFC converter working at high load and low load and possible solutions to eliminate the distortion of the current working at low power.

[1]  M. Corradin,et al.  Performance evaluation of a Schottky SiC power diode in a boost PFC application , 2002 .

[2]  K. M. Smith,et al.  A new PWM controller with one cycle response , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

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

[4]  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.

[5]  Ramesh Oruganti,et al.  A unity power factor converter using half-bridge boost topology , 1998 .

[6]  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..

[7]  B. Lu,et al.  Bridgeless PFC implementation using one cycle control technique , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[8]  K. M. Smith,et al.  A new PWM controller with one-cycle response , 1999 .