Development of a new single phase high power factor rectifier with ZVS commutation and high frequency isolation

Abstract

A new high-power-factor rectifier with high-frequency isolation is presented in this paper. The proposed topology presents intrinsic ZVS commutation allowing the operation with high-switching frequency. It also presents the multiphase operation reducing the input inductance and input current ripple. The structure is a bridgeless rectifier, reducing the number of semiconductors in conduction, presenting less conduction losses. The proposed structure is composed by a multiphase boost converter operating in CCM integrated with a ZVS DC-DC full-bridge converter without the output inductor and operating in DCM. The experimental results are obtained from a 2 kW prototype and switching frequency equal to 44 kHz, presenting efficiency equal to 91% at nominal power.