Voltage gain comparison of different control methods of the Z-source inverter

This paper compares voltage gain of control methods for the Z-source inverter under a given boost factor. The control methods of the Z-source inverter are simple boost control, maximum boost control and maximum constant boost control respectively. The Z-source inverter advantageously utilizes the shoot-through switching states besides active and zero states. The Z-source network makes the shoot-through states possible and provides the unique buck-boost feature to the inverter. Simulations of the circuit configuration and the control methods of the Z-source inverter have been performed in Matlab. The control methods and relationships of their voltage gains versus the boost factor are analyzed in detail and verified by simulation results.