Performance Analysis of Various PWM Strategies for Control of Permanent Magnet Synchronous Machines in High Voltage EV Application

An efficient control of Permanent Magnet Synchronous Motor (PMSM) is required for a high-performance electric drive. The type of modulation technique used to switch the Voltage Source Inverter (VSI) is essential to achieve higher DC bus utilization, lower the switching losses and harmonics, and improve the system efficiency. Space Vector PWM (SVPWM) and Third Harmonic Injected PWM (THIPWM) are two such modulation techniques for inverter switching. A detailed performance analysis is presented in this paper considering these two modulation techniques in the flux weakening area of operation for given load profile. A modified average power switching loss calculation model is developed to calculate the power loss during the hard switching of the IGBTs. A detailed comparison of IGBT power loss is presented with the comparison of average power calculation method and the modified power loss calculation model adapted for three-phase VSI. The Total Harmonic Distortion analysis (THD) uses the Fast Fourier Transformation analysis (FFT) tool. The entire system modeling and simulation were done using MATLAB/Simulink software.