A design method for single phase Z-source inverter

This paper proposes a design method for Z-source network based on inductor current. In Z-source inverter, when the variation of the output current from the Z-source network is large, the variation of the inductor current and the capacitor voltage increase in the Z-source network. Therefore, discontinuous current mode (DCM) condition transiently occurs in the Z-source network inductors. DCM condition affects the operation of the Z-source inverter. Against the problem, this paper proposes a new design method of the Z-source inverter to maintain continuous current mode (CCM) condition. The proposed method is confirmed by simulation results with PSIM and circuit experiments.