Novel nonlinear representation for two-stage power-factor-correction converter instability

Two-stage power-factor-correction (PFC) converter is the most common circuit to draw sinusoidal and in phase current waveforms from the ac source with a good regulated output voltage. The first stage is the boost PFC converter with average-current-mode control for achieving the near-unity power factor and the second stage is the forward converter with voltage-mode control for the purpose of a regulated output voltage. Stability analysis and design method were discussed depending on the linear models. Recently, new; nonlinear phenomena have been detected in PFC circuits and a new nonlinear model has been proposed for the pre-regulated PFC converter. Therefore, this paper introduces a study for stability of two-stage PFC converter. A novel nonlinear model for two-stage PFC converter is proposed. Then, stability analysis is studied depending on this nonlinear model. Simulation and experiment confirm this analysis with a good matching.

[1]  R. Ridley,et al.  Average small-signal analysis of boost power factor correction circuit , 1989 .

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

[3]  T. Ninomiya,et al.  Novel developments in the study of nonlinear phenomena in power factor correction circuits , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[4]  Leopoldo Rossetto.  Control techniques for power factor correction converters , 1994 .

[5]  Mohamed Orabi,et al.  New formulation for stability analysis of power factor correction converters , 2002, VIII IEEE International Power Electronics Congress, 2002. Technical Proceedings. CIEP 2002..

[6]  F. Lee,et al.  Small-signal modeling of the single-phase boost high power factor converter with constant frequency control , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[7]  Tamotsu Ninomiya,et al.  Nonlinear dynamics and stability analyses of boost power-factor-correction circuit , 2002, Proceedings. International Conference on Power System Technology.

[8]  Tamotsu Ninomiya,et al.  A novel modeling of instability phenomena in PFC converter , 2002, 24th Annual International Telecommunications Energy Conference.