Soft switching condition analysis for a novel ZVS-SVM controlled three-phase boost PFC converter

The ZVS-SVM controlled three-phase boost rectifier proposed by the authors can realize ZVS operation for all switching devices. In addition, the anti-parallel diode reverse recovery of all switch devices' is well suppressed. Moreover, SVM can be realized with switch devices operating at the fixed switching frequency. In this paper, the soft switching condition of the ZVS-SVM controlled three-phase boost PFC is analyzed. The relationship between the switches' voltage stress and circuit parameters is studied. The relationship between the circuit parameters and the soft switching condition is also investigated. The result is verified by a 3kW prototype.