A Novel Method for Current Ripple Control Used in PFC Converter

Due to the large current ripple of PFC converter used digital hysteresis control, this paper proposes a novel control arithmetic for current ripple minimum. Calculating the slope of current raise and fall, duty cycle can be calculated realtime with help of the current sampling value. In addition, considering the characteristic of digital sampling, this paper proposes a method that the point of current sampling during every switching period can be adjusted based on duty cycle, and it can ensure the current precision during sampling process. Experimental results prove that this control arithmetic can decrease the current ripple with fast response used digital hysteresis control.

[1]  A. K. Behera,et al.  A comparison between hysteretic and fixed frequency boost converters used for power factor correction , 1993, Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,.

[2]  R. W. Ashton,et al.  The design of stabilizing controls for shipboard DC-to-DC buck choppers using feedback linearization techniques , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[3]  Bin Wu,et al.  Analysis and implementation of a new PFC digital control method , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[4]  Xiao-Dong Sun,et al.  The controller of high frequency and high dynamic performance dual-boost PFC module based on DSP , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[5]  P. S. Ninkovic.  A novel constant-frequency hysteresis current control of PFC converters , 2002, Industrial Electronics, 2002. ISIE 2002. Proceedings of the 2002 IEEE International Symposium on.

[6]  M. Fu,et al.  A DSP based controller for power factor correction (PFC) in a rectifier circuit , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[7]  Yousheng Wang,et al.  Novel sampling algorithm for DSP controlled 2 kW PFC converter , 2001 .

[8]  J.A. Melkebeek,et al.  A sampling algorithm for digitally controlled boost PFC converters , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[9]  Mutsuo Nakaoka,et al.  A novel hysteresis current control scheme for single switch type single phase PFC converter , 2002, Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579).