Design considerations and performance evaluation of a 6-kW, single-switch, three-phase, high-power-factor, multi-resonant, zero-current-switching buck rectifier

The paper provides a complete design procedure of the multi-resonant, zero-current-switched (ZCS), high-power factor (HPF) buck rectifier for telecommunication applications and presents extensive experimental evaluations of its performance. The evaluation was performed on a 6 kW prototype operating from a 380 V/spl plusmn/10%, three-phase input voltage. The evaluation results demonstrate that the input current shaping using the multi-resonant buck power converter can be performed with a total harmonic distortion (THD) less than 5% and the maximum efficiency of 95%.