Performance of Modified Structure Asymmetrical Multilevel Inverter with Multicarrier PWM Control Strategies

The asymmetrical reduced switch single phase multilevel inverter (MLI) is presented in this paper. In comparison to a traditional multilevel inverter, the proposed topology uses fewer switches. Unipolar Multi Carrier Sinusoidal Pulse Width Modulation (UMCS-PWM) techniques are used to control an MLI. These pulse width modulation techniques encompass carrier overlapping (CO), alternate phase opposition disposition (APOD), and phase disposition (PD). The significance of key metrics like Total Harmonic Distortion (THD), VRMS (fundamental), crest factor, and distortion factor is assessed for several modulation indices. Simulation and experiments are used to illustrate the effectiveness of the suggested techniques. It is found that the UMCS-PDPWM method produces relatively low distortion output whereas the UMCS-COPWM strategy produces significantly greater fundamental RMS output voltage. The FPGA is used to implement the developed UMCS-PWM methods in real time. The results of the simulation and the experiment are often very comparable, which confirms the effectiveness of the suggested strategies.