Performance Analysis of EV Drive with Battery and Support from Super-Capacitor in Motoring and Regenerative Braking Conditions

An efficient EV drive system improves the vehicle's performance and reduces power loss in the modules. The voltage stability on the source and machine sides is vital for an EV during heavy load and high-speed conditions. With drastic variations of torque and speed in a drive cycle, the EV drive system needs to be stable and robust to these variations. In this paper, a standard battery module driving the EVs PMSM with support from the SC module is proposed. The speed controller used for the PMSM is FOC, with feedback from the machine's angular speed and stator currents. The performance of the EV drive system is analyzed using only the battery module and SC module support. CC and CV control structures are introduced in the specified model as per the requirement controlling the DC bus voltage. A comparative analysis between the two models is carried out in drive mode and regenerative braking mode, and the results are presented. The evaluation of these results includes DC bus voltage stability, PMSM stability, battery and SC performance comparisons. Validation of the better system is determined by this comparative analysis of the EV drive systems. The modelling and design of the proposed systems are implemented in MATLAB Simulink software with blocks considered from the ‘Power systems’ library.