SPACE VECTOR BASED DECOUPLED PWM TECHNIQUES FOR OPEN END WINDING INDUCTION MOTOR DRIVE

In this article, space vector based decoupled bus clamping PWM techniques are proposed for open-end winding induction motor drive (OEWIMD) fed with conventional two level inverters on either side. The switching vectors for the conventional inverters are generated using instantaneous reference voltages along with the simple digital logic. All the proposed bus-clamped PWM techniques are generated by phase shifting the one inverter reference phase voltages by 180 degrees with respect to the other inverter. A common-mode voltage is identified in the OEWIM drive. The entire space vector based decoupled bus –clamping PWM techniques proposed in this work are to reduce the CMV by greater extent and also give less switching loss compared to center spaced space vector PWM technique. The performance of all the proposed decoupled PWM techniques are explored both theoretically and experimentally and the corresponding results are presented.