Procedure to Select the Power Rating of Electrical Machines for an EV and Comparison with Different Drivetrain Configurations

E-drive technology is demanded for regulatory and climate protection reasons, and it comes with many advantages compared to ICE-based technology. Battery pack, e-motor controller, and e-motor are the key components of an electric powertrain that helps in propelling the electric vehicle (EV). The e-motor is the heart of an EV that delivers the required torque and speed continuously to meet the driving demand. To ensure that an e-motor continuously drives a specific vehicle over a specific geographical condition, the proper power rating of an electrical machine must be selected. This research paper has demonstrated the mathematical procedure to determine the power rating of an electrical machine for a particular vehicle based on the acceleration and drive cycle requirements by determining the various important parameters of the e-motor, such as peak torque, peak power, peak speed, base speed, etc. for different architectures of the drivetrain. It has also presented a comparison among different architectures of drivetrain: front-wheel drive, rear-wheel drive, and a four-wheel drive vehicle by comparing their important performance parameters such as torque requirement, acceleration, top-speed of the vehicle on the flat road surface and on the gradient road surface, etc. by using the simulation results of MATLAB.