Abstract：This paper presents a high gain Z-source inverter(HG-ZSI). The basic topology is known in the literature as a Z-source inverter(ZSI). The ZSI has the ability of buck-boost conversion and no dead time is needed in phase legs, so high reliability can be achieved. Alternative impedance network which can achieve higher step-up performance compared to traditional ZSI is presented. A comparison between the new and traditional single-stage inverters is performed. The advantage over ZSI of the new inverter is not only able to boost dc input voltage to higher ac output by single stage power conversion, but also reduce the voltage stresses of capacitors and current ripple of inductor. The circuit operation principle is analyzed in detail. Simulation and experimental results under the simple boost control method are shown to verify the correctness and effectiveness.
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2013, Vol. 28 
