Electric Vehicle Traction System Performance Enhancement Using FO-PI Controller

This paper investigates the effect of speed regulators on the battery bank voltage and current profiles for a prototype electric vehicle traction system. A 400 V, 6.6 Ah Li-Ion battery bank is established to power an indirect field oriented induction motor drive system. The performance of integer-order PI and fractional-order PI controllers is investigated while the electric vehicle traction system executes the urban and extra urban drive cycles. Also, the controllers' effect on the battery bank is examined under the sudden load disturbance. The experimental results reveal that the nonlinear fractional order PI controller provides better speed tracking with lesser control effort. The reduced control effort of FO-PI controller draws lesser current from the battery thus improving the battery voltage profile and efficiency.