Torque Ripples Minimization on DTC Controlled Induction Motor with Adaptive Bandwidth Approach

Abstract

Field oriented control (FOC) and direct torque control (DTC), also called vector control, are most famous control methods in high-performance motor applications. If we want to specify the basic handicaps of both methods: the FOC has parameter dependence while the DTC has high torque ripples. This paper proposes a new adaptive bandwidth approach to reduce torque ripples in DTC controlled induction motor drives. With the proposed method, instead of fixed bandwidth, adaptive bandwidth approach is investigated in hysteresis controllers on the DTC method. Both the conventional DTC(C-DTC) method and adaptive bandwidth DTC (AB-DTC) for induction motor are simulated in MATLAB/SIMULINK and the results are presented and discussed to verify the proposed control. The comparisons have shown that, torque ripples have been reduced remarkably with the proposed AB-DTC method.