Direct torque controlled matrix converter fed induction motor drive

Direct Torque Control (DTC) matrix converter fed induction motor drive system is high performance motor control scheme with fast flux and torque responses. Conventional DTC produces ripples in electromagnetic torque, which is the main drawback of this scheme. Switching pattern of all nine switches of matrix converter are generated by direct torque control scheme and by suitably selecting switching pattern, the electromagnetic torque ripple of the motor is reduced effectively. By this strategy, advantages of the DTC scheme and the benefits of the matrix converters can be combined and as a result, a satisfactory drive can be achieved. This paper presents direct torque control matrix converter fed induction motor drive at different conditions for different load torques and motor speed and rigorous analysis can be carried out.