Novel Three-Phase Smart Soft Switching PWM Inverter with Enhanced Performance

In order to reduce switching losses this work first proposes a new control scheme for an existing three-phase ZVS inverter circuit that uses one auxiliary switch. The proposed scheme called the one-switch ZVS enables all main switches diodes and auxiliary switches to be turned ON under zero-voltage conditions and in the meantime provides an opportunity to achieve zero-voltage turn-on for the main switches. However the main drawback of conventional method of three phase soft switching inverter using more number of auxiliary switches is the high cost and large space associated with the auxiliary switches. To overcome this problem this work further proposes a new three phase ZVS inverter topology that uses only one auxiliary switch. The proposed three-phase soft switching PWM Inverters operation and experimental result are presented