Single Phase Quasi-Z-Source Based Modified Cascaded Multilevel Inverter with Half-Bridge Cell

G. Prem Sunder, Dr. B. Shanthi, Dr. Alamelu Nachiappan, Dr. S. P. Natarajan

A new Quasi-Z-Source Modified Cascaded Multilevel Inverter (qZS-MCMLI) with Half-Bridge Cell presents attractive advantages over conventional cascaded MLI with voltage boost ability and reduced switches. The new proposed topology is comprised of cascaded auxiliary units and a full H-bridge inverter, where the auxiliary unit includes half bridge cell with qZS network. With qZS network shoot-through state control, the output voltage amplitude can be boosted, which is not limited to DC source voltage summation similar to conventional cascaded MLI. The performance parameters of qZS-MCMLI with various multicarrier PWM control methods are analysed with simulation results and portrayed here.