Robust Nonlinear Control for Direct Torque Control of Induction Motor Drive Using Space Vector Modulation

To solve the problems of torque ripple and inconstant switch frequency of inverter in the conventional direct torque control (DTC), a novel DTC method using space vector modulation (SVM) is proposed based on input– output feedback linearization technique, where hysteresis controller is substituted by input–output feedback linearization and switch table is substituted by SVM. In order to preserve the system robustness with respect to rotor resistances variations and uncertainties. IM drive simulation model with novel SVM-DTC is created and studied using MATLAB. Simulation results demonstrate the feasibility and validity of the proposed DTC system by effectively accelerating system response, reducing torque and flux ripple and a very satisfactory performance has been achieved.