Analysis and Pspice simulation of family of resonant power factor correction circuits

In this paper, we review the development of power factor correction circuits (PFCC) and present the requirements for PFCCs. A high power factor correction topology proposed with a single stage is analyzed and evaluated. The two outputs of the converter can be controlled independently using different control techniques. Because this power factor circuit handles only partial power delivered to the load and can operate at zero-voltage-switching (ZVS), it has relative high efficiency compared with conventional converters. It is shown that high power factor can be achieved even without active control based on the natural characteristics of resonant converter. The Pspice simulation results verified the theoretical approach.