A New Criss-Cross-Based Asymmetrically Configured T-Type Multi-level Inverter

Significant advancements in power electronics have led to the development of a suitable platform for exploring various multilevel inverter (MLI) topologies. The paper introduces a novel asymmetrical multilevel inverter topology called “A new Criss-Cross based asymmetrically configured T-Type Multi-Level Inverter” that exhibits various beneficial features such as high-quality staircase sinusoidal output voltage, reduced number of power switches, and fewer filter requirements. The proposed topology is designed for 27 levels with a minimized number of inverter components, and its performance is evaluated using both simulation and experimental results. The simulation is conducted using MATLAB/Simulink with a sinusoidal pulse-width modulation (SPWM) technique, and the experimental results are validated using a dSPACE real-time controller. A comparative study is also conducted with other recent proposed topologies, which reveals that the proposed topology requires fewer total MLI components in terms of power switches, isolated DC sources, and main diodes. The simulation and experimental results are analyzed for two different modulation indices, i.e., 0.3 and 1. The output voltage contains 14.89 and 3.36% total harmonic distortion (THD) for modulation indices of 0.3 and 1, respectively.