Zero-voltage-switching three-phase single-stage power factor correction convertor

As an alternative to two-stage cascaded ACiDC convertors, the paper presents a zerovoltage- switching (ZVS) single-stage three phase rectifier with inputioutput isolation. The proposed rectifier contains five active devices driven by a simple PWM controller and operates in discontinuous conduction mode (DCM) for the input power factor correction part and in continuous conduction mode (CCM) for the DC/ DC conversion part. Simple circuit topology, ZVS, for all active devices and diodes and low device voltage and current stresses make the proposed convertor attractive for low power (< 10 kW) applications. Operational principles, analysis, and design procedures are presented and verified by the experimental results obtained from a SkW prototype.