Fast-scale instability and dynamic parameter resonance of power factor correction Boost converter

Abstract

Based on the multiplication of dynamic eigenvalue coefficient and its dynamic stabilizing capability, fast-scale instability and its asymmetry in power factor correction (PFC) Boost converter with continuous peak current control mode are investigated. To realize higher power factor and less harmonic distortion, a kind of compensation strategy is proposed to make the input current a sinusoidal wave, and it is optimized with parameter resonance. The formulas are deduced,and the overall optimization is carried out. The results of digital simulation shows that the overall compensating strategy has the most powerful dynamic ability to ensure the quick stabilization during every stroboscopic period, and the fast-scale instability is controlled, and the approximate unit power factor and the best compensating effects are obtained finally, resulting in the increase of the conversion efficiency of PFC Boost converter.