A novel 49-level asymmetrical modular multilevel inverter: analysis, comparison and validation

High progresses in the field of power electronic create an appropriate bed to introduce new and upgraded multilevel inverter topologies. Such these topologies contain remarkable inherent advantages like: high quality staircase sinusoidal output voltage, low number of switches, low peak inverse voltage, et cetera. In this paper, a novel modular asymmetrical multilevel inverter is proposed to reduce the number of inverter's components, and accordingly make a cost-effective structure with excellent voltage-step creation. In accordance with the configuration of utilized switches and magnetite of DC voltage source, the proposed structure can provide a high-step staircase sinusoidal voltage without high increase of semiconductors. Consider this; symmetrical condition of the proposed structure also takes low number of switches as compared to other symmetrical structures. Finally, both the MATLAB/SIMULINK and experimental results have confirmed the accurate operation and voltage-step creation capability of the suggested multilevel inverter.