DTC with Interval Type-2 Fuzzy for Induction Motor Drive

Abstract

Direct torque control (DTC) used for the quickresponse of induction motor by controlling the torque. Operation with conventional DTC has some disadvantages of variable switching frequency with high ripple in torque. So, DTC-SVPWM with Proportional Integral (PI) controller is used which provides constant switching frequency with low ripples in torque. With the induction motor drive’s poor dynamic performance, the PI direct torque control (PIDTC) produces significant torque ripples. To improve the torque ripples of induction motor drive (IMD), interval type 2 fuzzy (IT2F) direct torque control is used. In IT2FDTC, PI were replaced to fuzzy 2 controller. By making use of IF and THEN rules in the Mamdani method for IT2FDTC the data were used effectively. For type reduction in IT2FDTC centroid method is preferred. The IT2FDTC has less flux and torque ripples, as well as lower current total harmonic distortion (THD). Furthermore, when compared to PIDTC, IT2FDTC has a faster dynamic performance of the IMD. Continuous tuning of gain is required in PI controller; hence the performance would be difficult. So, fuzzy technique is proposed for better performance. In this proposed work the speed is settled early and torque ripples are minimized than the conventional PIDTC. The comparison table of PIDTC and IT2FDTC is also included.