Speed sensor fault tolerant controller design for induction motor drive in EV

This paper deals with the problem of speed sensor fault tolerant controller (SSFTC) design for Induction Motor (IM) drive in electric vehicle (EV). First, the Takagi-Sugeno (T-S) model approach was adopted to represent the nonlinear dynamic of IM subject to speed sensor faults and unknown bounded disturbance. Next, based on L2 robust fault detection filter design, a Modified Field Oriented Controller (MFOC) is designed. The proposed approach requires the knowledge of the occurring faults which are estimated from a descriptor observer. The observer gains are determined by solving a set of Linear Matrix Inequality (LMI). Finally, simulation results show the effectiveness of the proposed approach evaluated on 7.5 kVA Induction Motor.