Torque ripple minimization in direct torque control at low-speed operation using alternate switching technique

Direct torque control (DTC) of induction motor is prominent to offer instant and flux with a simple structure. However, this scheme suffers from two major drawbacks namely high ripple variable switching frequency the inverter, especially during low-speed operation. During condition, positive slope very steep overshoot occurs frequently resulting in become great significance. This paper proposes new effective technique reduce by integrating alternate inverter status limit surge. By varying duty cycle switching, rate surge can be controlled chances overshoots, selection reverse voltage vector avoided. The feasibility proposed has been validated using MATLAB/Simulink software through experimental results. results show minimizes over 40% reduction while maintaining structure DTC.