A Novel Minimum Voltage Active Clamping SVM (MVAC-SVM) Controlled Three-Phase PFC

The MVAC-SVM controlled three-phase boost rectifier can realize ZVS operation for all switching devices. SVM can be realized with switch device operating at the fixed switching frequency. And the switching voltage stress of all the power switch devices is equal to the DC link voltage. In this paper, a minimum voltage active clamping zero voltage switching SVM controlled three phase boost rectifier is proposed. The soft switching condition of the MVAC-SVM controlled three-phase boost PFC is analyzed. The operation principal is described in detail. The compare between CAC-SVM and MVAC-SVM PFC converter is studied. A 10 kW DSP controlled boost rectifier prototype is built to verify the theory.