Modelling and Simulation of Multi-Level Inverters Utilizing Alternate Phase Disposition (APOD) PWM Modulation in MATLAB/Simulink

In recent times, the growing demand for enhanced industrial applications and the rise of Electric Vehicles (EVs) have led to a requirement for higher power equipment. Certain applications, such as medium voltage motor drives and utility systems, now demand the utilization of medium voltage and megawatt drivers. To address these needs, the concept of multi-level inverter topologies has been introduced, particularly for medium and high-power applications. The evolution of multilevel converters, starting with three levels to achieve elevated power levels, has given rise to various topologies. These converters utilize a progression of force semiconductor switches and various lower voltage DC sources to integrate a flight of stairs voltage waveform, in this manner empowering higher power change. While the PWM inverter has shown exemplary execution, issues like consonant bends have been seen in two-level inverters A viable solution to these challenges involves increasing the number of voltage levels, a feat accomplished by multilevel inverters. The traditional approach often leads to high switching losses and suboptimal drive performance. This paper proposes an effective alternative by introducing more levels to mitigate harmonics, thereby enhancing drive performance. The results of this approach were analysed using MATLAB/Simulink.