Cascaded Multicell Trans-Z-Source Inverter

Ravi Kumar; Jaffarali

Abstract: Inverters with high-output voltage gain usually face the problem of high-input current flowing through their components. The problem might further be exaggerated if the inverters use high-frequency magnetic devices like transformers or coupled inductors. Leakage inductances of these devices must strictly be small to prevent overvoltage?s caused by switching of their winding currents. To avoid these related problems, cascaded trans-Z-source inverters are proposed. They use multiple magnetic cells in an alternately cascading pattern rather than a single magnetic cell with large turn?s ratio. The Z-source dc?ac inverter was proposed before various Z-source dc?dc converters surfaced.

Keywords: inverter, trans-Z-source, single magnetic cell, magnetic cell