Electric Traction Motor Peak Power Estimation Strategies for Electric Vehicle Application

Abstract

The electrified automotive vehicles are pollution free mobility and those are referred as eco-friendly mobility. In the electric vehicle, different subsystem of motor, Controller and battery are included. During the design electric vehicle, the important subsystem part to be chosen is an electric motor as because as it plays major role in an electrified vehicle. The electric motor used in an electrified vehicle need to create vehicle demanded traction power and torque that are necessary for vehicle traction requirement. The key role is to calculate an appropriate power of motor based on the dynamic load to be pulled. This paper explains the strategies for calculation of power of electric  motor with an examples of Brushless Direct Current motor for an electric vehicle. The vehicle dynamics is derived for selecting the appropriate proper electric motor subsystem that would provide necessary power, torque for the traction demanded. In addition to that, proper calculation of power rating required also involves in finalizing Motor characteristics towards torque and speed, Power and speed curves. Hence, to meet all the tractive characteristics of the motor performance, the Dynamic load of the vehicle is derived and considered for the BLDC Motor power calculation.