Multi-cell Trans-z-source Inverters

Z-source inverter is a single-stage inverter with added voltage-boost capability for complementing the usual voltage-buck operation of a traditional voltage-source inverter. And it embedded with two capacitors and two inductors in its impedance network. As long as magnetically coupling components embedded within the network, the developed z-source inverters shows additional merits such as higher boosting ratio or using less passive device. The trans-z-source inverter with one transformer and one capacitor is reported recently. To increase the boosting ratio further a cascaded concept is proposed with adopting multi-winding transformer which provides a possibility for this paper to using coupled inductor instead of multi-winding transformer and remains the same voltage gain as cascaded trans-z-source inverter. Theoretical analysis for explaining these operating features has already been discussed before simulation were performed.