Sensorless Direct Torque Control of Induction Machine with MRAS Speed Estimator

The strategy of the DTC direct torque control is based on the separate control of the stator flux and electromagnetic torque using two hysteresis controllers and a switching table to generate directly the voltage inverter control associated with the induction motor. The rotor speed is estimated by the model reference adaptive system (MRAS) scheme which is determined from measured terminal voltages and currents. The MATLAB SIMULINK is used to perform the simulation.