Digitally Controlled Boost PFC Converter with Improved Output Voltage Controller

A novel digital voltage controller for boost PFC converters is proposed in this paper. If a fast voltage compensator is applied to control the DC output voltage, the DC output voltage ripple, pulsating at twice the grid frequency, causes a third harmonic of considerable magnitude in the line current. The new controller samples the DC-bus voltage at all zeroes of its ripple, resulting in a fast voltage control algorithm that guarantees a low total harmonic distortion in the line current. The performance of the proposed voltage controller is compared to other voltage controllers, by using a prototype of a digitally controlled boost PFC convertor.

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

[2]  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.

[3]  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.

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

[5]  Robert W. Erickson,et al.  Self-tuning digitally controlled low-harmonic rectifier having fast dynamic response , 2003 .

[6]  N. Matsui,et al.  Harmonic suppression and DC voltage control of single-phase PFC converter , 2000, 2000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018).

[7]  Ying-Yu Tzou,et al.  Digital control of a single-stage single-switch flyback PFC AC/DC converter with fast dynamic response , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[8]  Robert W. Erickson,et al.  Self-tuning digital comb filter for PFC applications , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[9]  George C. Verghese,et al.  Fast controller for a unity-power-factor PWM rectifier , 1996 .

[10]  Jan Melkebeek,et al.  Harmonic mitigation potential of shunt harmonic impedances , 2003 .

[11]  Ward Jewell,et al.  Effects of harmonics on equipment , 1993 .

[12]  Simon Wall,et al.  Fast controller design for single-phase power-factor correction systems , 1997, IEEE Trans. Ind. Electron..

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