Common arm 3-phase transformer multi-level inverter

The number of transformer and the size of transformer in inverter using 3-phase transformer could be reduced compare with a multi-level inverter using single phase transformer. But still the 3-phase transformer inverter needs many switches. we proposed the isolated multi-level inverter using 3-phase transformers and common arm, in this paper. Also, a novel space vector control is proposed for isolated multi-level inverter using 3-phase low frequency transformer and the propriety of proposed method is also verified through simulation.