Next Generation Zero-Voltage Soft-Switched PWM Three-Phase AC-DC Active Power Converter

Abstract

A high-peifonzaance ZVS-PWM three phase ACI DC active power converter usinig a newly pr-oposed transformer-assisted Quasi-Resonzant DC Link (TQRDCL) is described in this paper The operating principle of this TQRDCL which has such excellenitfeatures as minimium dc bus voltage stress and no conmlexthy in predictive intiiializinig resonant indutctor current conztrol under load fluctuationis is discussed. A simiple circuit control and the designi procedure are offered. The time-shared instantanzeous space-voltage vector P'WM is inrioduced as the control miethod for ZVS three phase AC/DC active power converter and its performanice evaluations are illustrated using simulated results .