Abstract

A new three-phase, single-stage, isolated zero-voltage-switching (ZVS) rectifier that achieves less than 5% input-current total harmonic distortion (THD) and provides tightly regulated output voltage is introduced. The proposed circuit is obtained by integrating the three-phase, two-switch, ZVS, discontinuous-current-mode (DCM), boost power-factor-correction (PFC) rectifier with the ZVS full-bridge (FB) phase-shift dc/dc converter. The performance evaluation of the circuit was performed on a three-phase 1.8-kW prototype designed for the line-to-line voltage range of 180-264 VRMS and delivering a tightly regulated, selectable, dc output voltage from 220 V to 300 V.

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