Three-phase switched-inductor Z-source matrix converter

Switched-inductor Z-source network, an expansion of the popular concept of Z-source dc link, was originally proposed for boosting the output voltage of power electronic inverters. In this paper, that idea is extended on a three-phase indirect matrix converter. The converter is based on the ultra-sparse matrix topology characterized by the minimum number of semiconductor switches. The switched-inductor Z-source network is placed between the three-switch input rectifier stage and the output six-switch inverter stage. A brief shot-through state produces the voltage boost. An optimal pulse width modulation technique was developed to achieve high boosting flexibility and minimum switching losses in the converter.