Implementation of single-phase boost power-factor-correction circuits in three-phase implications

A three-phase rectifier employing three single-phase boost power-factor-correction circuits is analyzed, Each converter operates in the continuous conduction mode (CCM), which allows a high power factor and a small EMI filter, Current sharing is ensured by a common voltage loop driving the individual current loops of the three converters, A suitable circuit arrangement is devised to limit phase interaction, The zero-voltage-transition technique (ZVT) is successfully applied to each converter, in order to obtain zero turn-on losses and soft turnoff of the freewheeling diodes, Results of a 1800-W 100-kHz experimental prototype are reported, which confirm the theoretical forecasts.