DIRECT TORQUE CONTROL OF MATRIX CONVERTER FED INDUCTION MOTOR DRIVE

This paper presents the direct torque control of induction motor drive using matrix converters. DTC is a high performance motor control scheme with fast torque and flux responses. However, the main disadvantage of conventional DTC is electromagnetic torque ripple. In this paper, direct torque control for Induction Motors using Matrix Converters is analysed and points out the problem of the electromagnetic torque ripple which is one of the most important drawbacks of the Direct Torque Control. Besides, the matrix converter is a single-stage ac-ac power conversion device without dc-link energy storage elements. Matrix converter (MC) may become a good alternative to voltage-source inverter (VSI). This work combines the advantages of the matrix converter with those of the DTC technique, generating the required voltage vectors under unity input power factor operation. Simulation results demonstrates the effectiveness of the torque control.