DYNAMIC MODELLING AND PERFORMANCE ANALYSIS OF A CONVERTED ELECTRIC VEHICLE DRIVEN BY INDUCTION MOTOR

Abstract

This comprehensive study details the modeling and performance analysis of the drive train of a converted electric vehicle to determine the appropriate gear ratio and battery pack for the vehicle conversion project. The resistive force model and drive cycle simulations are used for determining the power and torque requirements of the motor in order to select the appropriate gear. The effect of vehicle mass, rolling resistance, and torque requirements significantly affect the vehicle's performance and driving range. The drivetrain modeled in MATLAB/Simulink provides a comprehensive view of the system's behavior, including the battery state of charge, battery current, and motor power considering the battery's internal resistance and power losses in the motor. Overall, the analysis described suggests that the chosen LiFePO4 battery cells, coupled with an appropriate gear ratio, should be able to provide sufficient power and driving range for the vehicle in the selected drive cycles. The vehicle coupled in the 2nd gear provided the mileage of 0.173 kWhr/km for HWFET drive cycle. In the developed drive cycle, the vehicle has a mileage of 0.231 kWhr/km. However, it is essential to test the system thoroughly in real-world conditions to validate the simulation results and optimize the system's performance.