A New Asymmetrical Cascaded Multilevel Inverter with Reduced Number of Components

Multilevel inverters (MLIs) are known as one of the most widely used power converters in power electronic fields. This study proposes a new voltage source inverter (VSI) for MLI with reduced number of components. The recommended MLI is implemented with 8 DC links and 18 switches, which generates 33 output voltage levels in asymmetric source configuration. All voltage levels (positive, negative and zero) are synthesized at the output terminals without any additional circuit. Cascaded connection of the topology is also proposed. Compared with other conventional and recently invented topologies, it uses less number of components. The accuracy performance of the suggested MLI in synthesizing the positive, negative and also zero voltage levels is verified over the simulation results (MATLAB/SIMULINK software) on a 33-level inverter.