A Generalized Symmetrical and Asymmetrical Multilevel Inverter Topology with Reduced Number of Components

In the modern technological world, Multilevel Inverters (MLI) are preferred over square wave inverters for medium and higher voltage applications. They offer beneficial merits such as low Total Harmonic Distortion (THD), reduced voltage stress, power quality improvement, and high reliability during faults compared to traditional inverters. However, large components, circuit complexity, and high cost make the concept unattractive. So, this paper focuses on simple generalized symmetrical and asymmetrical MLI with less components suitable for renewable energy and electrical drive applications. The switching signals are generated by an efficient nearest voltage level algorithm technique. In our paper, two-module 9-level symmetrical and 21-level asymmetrical MLI are taken to validate the circuit. The novelty has been proved by comparing their performance parameters with other configurations. Further, by cascading the proposed topology in series, the generalized equation for parameters has been developed. The topology has been simulated by MATLAB/Simulink. Then its results are tested under R and RL loads. In the asymmetrical case, THD satisfies the IEEE standard and eliminates the filter requirements.