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Novel three phase multi-level inverter topology with symmetrical DC-voltage sources

In this paper, a novel three phase modular multi-level inverter (MMLI) is proposed. The proposed inverter consists of primary cell and repetitive modular cells which are connected in series arrangement with the primary cell. Therefore, the proposed topology is able to get more output voltages levels number by adding extra modular cells. Both the sinusoidal pulse width modulation (SPWM) and staircases modulation are effectively executed. The proposed inverter is distinguished by several advantages such as: reduction in the number of semiconductor power switches, reduced Dc-voltage sources count, high utilization factor of the used Dc-voltage sources, and the control execution simplicity. Accordingly, the installation cost and size are reduced. It is simulated using MATLAB software package-tool. In addition, a prototype is developed and examined, to verify both control techniques and performance of the topology. Moreover, experimental results are provided to authenticate the simulation results and it show high similarity with it.