Key Technologies of EV Motor Drive System Design

For pure Electric Vehicle (EV), motor is the one and only power source. Comparing with industry motor, the motor drive system in EV has several challenges, such as dynamic running with unpredicted drive cycle, high torque/power density to reduce the vehicle curb weight, robust limp-home functionality to ensure vehicle can run even when some key components failed, life-time guarantee, wide speed control range, etc. This paper gives detail description about these key technologies in EV motor drive system design, such as weakening control, torque accuracy, and limp-home strategies, etc. It can be provided as a good reference for EV motor drive system design.