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Performance Analysis of Sensor Less Based DTC of Induction Motor

Asiya Husna V, Kousalya D, Manoj Kumar N

Direct Torque Control is most widely used in industrial standard for high power induction motor drives. The conventional DTC method uses the hysteresis-based voltage switching method which has some drawbacks of higher torque ripple and speed pulsation. The main aim of the paper is to obtain the enhanced torque control and smooth flux trajectory. The proposed approach uses the sensorless drive which is incorporated in Direct Torque Control to improve the performance. Sensorless drive eliminates the shaft mounted speed encoder which is undesirable in a drive because it increases the cost and reliability problems. Sensorless method is used to estimate the speed signal with the help of machine terminal voltages and currents. The proposed method is simulated with the help of MATLAB and result shows that performances are improved.