Improvement of Based Sector and Comparison Speed and Electromagnetic Torque of Direct Torque Control

Abstract

Direct torque control is one type of vector control used to operate an induction motor. Efficient control rules for induction motor drives offer a great chance to save energy. In comparison to DC batteries, supercapacitor (SC) technology is commonly recognised as one of the most promising and energy-efficient technologies for next-generation energy storage systems. Rotating equipment generates vibration, which causes rotor dynamic. Battery applications also provide high torque current for induction motor start-up. The goal of these investigations and analyses is to improve the performance of the electrical device system for six sector and twelve sector direct torque control methods employing DC battery and supercapacitor. The direct torque control model is separated into seven sections: input energy storage, voltage source inverter, flux and torque estimate, sector detection, flux and torque controller, vector selection table, and induction motor. The paper focuses on the improvement of based sector for six sector and twelve sector technique of induction motor in MATLAB/Simulink simulation framework by employing different energy storage (supercapacitor and DC battery). The output of the system designed in MATLAB Simulink has been examined in terms of rotor speed and electromagnetic torque. In terms of rotor speed, the twelve-sector approach requires 0.04 second speed transition to reach steady state response, but the six-sector method requires 0.06 second when a load disturbance is added for DC battery and supercapacitor. When compared to the six-sector approach for DC battery and supercapacitor, the electromagnetic torque that employs the twelve-sector method provides more smoothly following the load torque. When a load disturbance is applied, the electromagnetic torque in the twelve-sector approach produces a spiky torque of around 15.5N, whereas the electromagnetic torque in the six-sector method produces 18N. In terms of electromagnetic torque, the usage of a supercapacitor generates 15N, whereas the use of a battery provides around 50N for the six sector and twelve sector methods.