Comprehensive modeling of electric vehicles to analyze their performance based on different propulsion profiles

Abstract

Battery electric vehicle (BEV) technology is the most often used type of EV due to its reliable energy storage system. According to the different driving cycles of EVs, electric motors undergo degradation as a result of sudden variations in the dynamic state of torque. Therefore, reliability and performance assessment of the electric motor are important. This paper presents transient and harmonic analysis techniques that were engaged to observe the motor conditions in different operating modes. In order to study the system's behavior, in addition to the harmonic analysis on torque and stator currents, the transient response of stator current for different electric motors is also touched upon in this paper. In an ideal BEV, the motor voltage supplied by the battery is considered to be constant, whereas in real applications, the voltage drops due to the SOC characteristics of the batteries. This paper will also discuss the motor frequency response used to investigate the effects of motor input voltage on the performance of the system. Complete sets of the experimental test is discussed and reported in this study to verify the numerical investigation results.