Interaction between EMI filter and power factor preregulators with average current control: analysis and design considerations

This work was supported by CNPq. Dr. Spiazzi visit to the University of Campinas was supported by FAPESP. Abstract The effects of a non negligible source impedance, due to the presence of an input EMI filter, on the stability of Power Factor Preregulators with average current control are analyzed by using a State Space Averaged model. The modeling allows to derive a simple expression for the loop gain in terms of the converter current loop gain. The overall system stability is studied for boost, Cuk and SEPIC PFP topologies. Based on this model, a simple modification of the standard current control loop is proposed which increases the converter robustness. Comparison between model forecasts and experimental measurements is carried out using two prototypes: one based on the boost topology and the other based on the SEPIC topology both rated at 600W. Finally, the model accuracy is investigated with measurements at different current loop bandwidths.

[1]  F.C. Lee,et al.  Input filter design for power factor correction circuits , 1993, Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics.

[2]  I. Barbi,et al.  A unity power factor multiple isolated outputs switching mode power supply using a single switch , 1991, [Proceedings] APEC '91: Sixth Annual Applied Power Electronics Conference and Exhibition.

[3]  R. D. Middlebrook,et al.  Input filter considerations in design and application of switching regulators. , 1976 .

[4]  A. S. Kislovski,et al.  Source impedance and current-control loop interaction in high-frequency power-factor correctors , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[5]  Giorgio Spiazzi,et al.  High-quality rectifier based on coupled-inductor Sepic topology , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[6]  L. Balogh,et al.  Power-factor correction with interleaved boost converters in continuous-inductor-current mode , 1993, Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,.

[7]  W. M. Polivka,et al.  Input filter design for current-programmed regulators , 1990, Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition.

[8]  Giorgio Spiazzi,et al.  Analysis of EMI filter induced instabilities in boost power factor preregulators , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[9]  Giorgio Spiazzi,et al.  Design criteria for power factor preregulators based on Sepic and Cuk converters in continuous conduction mode , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.