A Robust Nonlinear Control for the Traction Dynamics of an Electric Vehicle

摘要

This paper treats the traction dynamics in the electric vehicle driven by a Doubly Fed Induction Motor (DFIM). A sliding mode based robust nonlinear control law at the torque level determines the desired torque for a given road parameters. The DFIM control is based on a flux orientation and a scalar control of the rotor Since the road parameters vary, an adaptive control based on the estimation of these parameters and the friction force emphasizes the sliding mode control. The generated torque is injected as consign for the closed loop DFIM control so as to guarantee a stable dynamics of the vehicle Simulation results confirm that the developed control strategy maintains the slip ratio at its optimum value (0.2) while the road surface varies.