Nonlinear Representation of Two-Stage Power-Factor-Correction AC/DC Circuits


Vol. 4, No. 4, pp. 197-204, Oct. 2004
10.6113/JPE.2004.4.4.197


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 Abstract

Two-stage Power-Factor-Correction (PFC) converters are the most common circuits for drawing sinusoidal and in phase current waveforms from an ac source with a good regulated output voltage. The first stage is a boost PFC converter with average-current-mode control for achieving the near-unity power factor and the second stage is a forward converter with voltage-mode control to regulate the output voltage. Stability analysis and design methods of two-stage PFC converters have previously been discussed using linear models. Recently, new nonlinear phenomena have been detected in pre-regulator boost PFC circuits and a new nonlinear model has been proposed for pre-regulated PFC converters. Therefore, investigation of two-stage PFC converters from the nonlinear viewpoint becomes important because the second stage DC/DC converter adds more complexity to the circuit. So, this paper introduces a study of the stability of two-stage PFC converters. A novel nonlinear model of two-stage PFC converters is proposed. Then, a stability analysis is made based upon this nonlinear model. The high correspondence between the simulated and experimental results confirms our analysis.


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Cite this article

[IEEE Style]

M. Orabi and T. Ninomiya, "Nonlinear Representation of Two-Stage Power-Factor-Correction AC/DC Circuits," Journal of Power Electronics, vol. 4, no. 4, pp. 197-204, 2004. DOI: 10.6113/JPE.2004.4.4.197.

[ACM Style]

Mohamed Orabi and Tamotsu Ninomiya. 2004. Nonlinear Representation of Two-Stage Power-Factor-Correction AC/DC Circuits. Journal of Power Electronics, 4, 4, (2004), 197-204. DOI: 10.6113/JPE.2004.4.4.197.