Novel Intelligent Direct Torque Control for Permanent Magnet Synchronous Motor Drive

To solve the problems of torque ripple and in constant switch frequency of inverter in the conventional direct torque control (DTC), a novel DTC method using space vector pulse width modulation (SVM) is proposed based on analysis of permanent magnet synchronous motor (PMSM) mathematical model, where hysteresis controller is substituted by PI controller and switch table is substituted by SVM. In order to improve system performance, fuzzy control is used in speed loop and ANN is used in SVM. PMSM 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 improving system performance.