Design of Z‐Source and Quasi‐Z‐Source Inverters

Inductance and capacitance are the two main parameters to be designed in the Z-source/quasi-Z-source inverter. This chapter focuses on the network parameters, loss calculations, voltage and current stress, coupled inductor of Z-source/quasi-Z source inverters and also efficiency, cost, and volume, in comparison to the conventional inverter. For three-phase qZSI, the inductor and capacitor should be designed to limit the switching frequency current and voltage ripple. However, for single-phase qZSI, the double line-frequency ripple will be the main concern for design of the inductor and capacitor, because larger inductance and capacitance are required to limit the switching frequency ripple. The total loss consists of those of the H-bridge device, qZS diode, inductor, and capacitor of qZS network. The voltage and current stresses depend on the modulation methods. The presented modeling, circuit analysis, and power loss evaluation provided an illustration for the future building and development of impedance source inverters/converters.