Multi-Output Hybrid Quasi Z-Source Converter with Dual DC and Multiple AC Outputs

This work presents two buck-boost multi-output hybrid quasi z-source converters (qZSCs) capable of giving dual dc and multiple ac outputs simultaneously from one dc input. The proposed topologies are extracted from quasi z-source inverter (qZSI) to get series and parallel mode multi-output inverters having both voltage buck and boost capabilities along with other properties such as energy conversion in single-stage and power control along with inherent shoot-through protection and immunity to EMI associated issues, which on the other hand cannot be achieved with conventional voltage source and current source inverters. The proposed converter circuit in this paper is depicted with two ac output H-bridge series and parallel combinations. Both series and parallel mode multi-output converters are accomplished of generating two dc and ac outputs out of which one ac and dc output have the ability of obtaining boost and buck outputs, and second dc output have ability to give boost output. A detailed steady state operation of series-mode topology and parallel-mode topology of the proposed qZSCs are carried out and simulation results were obtained with dynamic load variations to validate the proposed concept.