Torque ripple minimization in DTC based induction motor drive using carrier space vector modulation technique

This paper illustrates the implementation of the direct torque control (DTC) strategy for induction motor (IM) drive using carrier space vector pulse width modulation technique. In the present work, the algorithm used for DTC based control of IM is Carrier Space Vector Pulse Width Modulation (CSVPWM) technique. A comparison of performance between standard and carrier based SVPWM techniques have been made considering the presence of harmonics in phase voltage, phase current and stator flux linkage which are responsible for the torque ripple. Using simulation results relative merits of the standard SVPWM (SSVPWM) and CSVPWM have been evaluated. Overall performance of conventional, SSVPWM and CSVPWM DTC based IM drive from the viewpoint of torque ripple minimization have been evaluated using simulation results. Simulation results are experimentally validated.