Realization of Trinary Asymmetrical Nine Level Reduced Switch Count Multi Level Inverter

The popularity of Multilevel Inverters (MLIs) for obtaining high-power conversion due to their low voltage stress across power switches and low total harmonic distortion in output voltage waveform has emerged enormously. Thus, a trinary asymmetrical module based 9-level RSC-MLI is proposed in this work. By the replacement of a few bidirectional switches with unidirectional switches, the number of semiconductor devices is reduced. Due to this, voltage stress across each switch is reduced. In addition to this low Total Harmonic Distortion and improved efficiency with Zero Voltage Switching operation. The ease of control and implementation is assessed using a reduced carrier pulse width modulation technique, which overcomes limitations of other schemes such as the number of carriers, number of comparators, and total harmonic distortion. Additionally, the superiority of the proposed asymmetrical module over the literature reported is evidenced based on switching losses, redundancy and efficiency. Simulation is carried out on MATLAB/SIMULINK R2020(b). Finally, the simulation results demonstrate the reliability of the proposed design.