Performance Optimization of EV Motor through Novel Modulation Techniques in SiC Multilevel Inverter

Abstract

Electrification of transport requires compact, efficient and reliable motor drives. Multilevel, Silicon Carbide (SiC)-based inverters (MLIs) have become an attractive new technology in the propulsion of Electric Vehicles (EVs) because of their high switching frequency, low conduction loss and high thermal stability. This paper provides an in-depth comparison of new modulation techniques, Optimized Space Vector PWM (OSVPWM), Hybrid Multicarrier PWM (HMCPWM), and Selective Harmonic Elimination PWM (SHEPWM) on SiC MLIs to for EV motor drives. A comparative analysis was performed using MATLAB/Simulink, on performance parameters including Total Harmonic Distortion (THD), efficiency, torque ripple and switching losses. According to the results, the OSVPWM method has the lowest THD (3.5%), and SHEPWM reduces switching losses by 18% than the traditional SPWM. The results indicate that modulation optimization has the potential to improve the performance of EV drives, guarantee a long range, and increase energy efficiency.