A new single stage power factor correction(PFC) AC/DC converter based on zero voltage switching(ZVS) full bridge topology is proposed. Since the series-connected two transformers act as both inductor and main transformer by turns, the proposed converter is operated with a wide ZVS range, requires no additional devices for ZVS. Furthermore, since there is no need to use an output inductor, the proposed converter features high power density. The proposed converter gives the good power factor correction, low line current harmonics distortion, and tight output regulation.
A mode analysis, design equations through a large signal modeling, and experiment results are presented to verify the validity of the proposed converter.
