A Novel Scheme of an Unified Flux and Torque Control Method for Direct Torque Control Algorithm Based Induction Motor

摘要

This paper highlights a new approach to minimize the ripples in the induction motor drive with Direct Torque Control (DTC). The DTC technique involves both the stator flux and electromagnetic torque error mechanism. With reference to these two the appropriate voltage vector is produced by switching table. The mechanical speed differs according to the voltage vector switching frequency. The DTC is one of the best approaches through which certain defects like, high ripple in torque, low speed operation and changes in torque command can be overcome. This project is simulated on the deadbeat control and flux control with combination of these two a new controller named unified flux and torque controller is originated. This controller has more merits compared to the conventional controller. The main advantage is the reduction of high ripples by considering the minimum-distance vector which adds a great privilege to the DTC.