Experimental results of the new ZVS PWM voltage source inverter with active voltage clamping and comparison with classical structures

In this work, experimental results of the new pulsewidth-modulation zero-voltage-switching voltage source inverter is presented. At rated load, commutation under ZVS condition is satisfied, and a quasi ZVS commutation is guaranteed under all other load current. The novel topology has the feature of being modulated by any conventional pulse-width-modulation strategy employed in the hard-switching inverters. The maximum voltage applied in all switches is clamped and limited in a reduced value and it does not produce excessive current stress. Operation description, theoretical analysis and design example are presented in the paper. A comparison among the results obtained from the new inverter topology with classical structures is made, Including the results obtained from an Undeland snubber aided inverter.