RESEARCH ON DIRECT TORQUE CONTROL FOR INDUCTION MOTOR BASED ON MINIMUM VOLTAGE VECTOR ERROR

Traditional Direct Torque Control (DTC) has gained popularity due to its simplicity, robustness, and rapid torque response. However, it is not without its drawbacks, including high Total Harmonic Distortion (THD), significant torque fluctuations, and varying switching frequencies. These limitations have paved the way for further research in the field of traditional DTC drive systems. In order to enhance performance, this dissertation introduces a novel approach based on minimising voltage vector errors. The primary objective is to reduce the disparity between the voltage vector applied to the machine terminal and the reference voltage vector. This is achieved by optimising the duty ratio through the proposed method. Importantly, this optimization process does not introduce additional complexity to the existing method. The proposed methodology is rigorously simulated using the MATLAB environment to validate its effectiveness and potential improvements in traditional DTC drive systems.