Sensorless Direct Torque Control of Induction Motor using fuzzy logic controller applied to electric vehicle

This paper treats a speed-sensorless drive of a three-phase Induction Motor (squirrel-cage). The purpose is to implement an electric traction system, based on the use of IM controlled by power electronic converter. This system allows the speed control of the vehicle, forward, backward and regenerative braking. The four quadrants operation is required. The developed control strategy is based on classical Direct Torque and Flux Control (DTC). Both rotor speed controller and rotor speed estimator are based on fuzzy logic controller (FLC). The obtained control performances are shown by simulation using MATLAB and its toolbox SIMULINK.