Analysis of Nonlinear Operation in Power-Factor-Correction Converters

概要

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A new class of nonlinear phenomena has recently been covered in Power-Factor Correction (PFC) converter. Period doubling bifurcation and chaos instability are encountered in PFC circuit. In this paper, a novel method to judge the system stability is introduced depending on the phase plane trajectory. The symmetry around the vertical axis assures the system stability. However, the symmetry around the horizontal axis improves the system power factor. Stability maps are introduced at different loads to clarify the power factor and also the instability regions. Instability regions enlarge as the operation moves toward light loads. Then, the nonlinear dynamics of period doubling bifurcation is understood from the instantaneous powers waveforms. Bifurcation maps is developed to determine the accurate minimum output capacitance value that assure the system stability at all cases. Experimental results prove the simulation and mathematical results with a very good matching.
社団法人電子情報通信学会の論文
2002-07-05