Modeling and Simulation of Direct Torque Control for Induction Motors

This article explores the modeling and simulation of direct torque control (DTC) for induction motors. We begin by introducing the fundamental principles of induction motors and the core concepts of DTC strategy, followed by an in-depth analysis of the advantages and limitations of this control approach. The mathematical modeling section covers the implementation of motor equations in simulation environments, typically involving dq-axis transformation and flux/torque estimation algorithms. We provide detailed guidance on using simulation tools like MATLAB/Simulink to implement DTC, including key function blocks for hysteresis controllers, switching tables, and flux/torque calculators. The simulation methodology section explains how to configure parameters for motor models and control systems, with emphasis on proper sampling time selection and discretization techniques. Finally, we analyze simulation results to evaluate control performance metrics such as torque ripple, dynamic response, and flux tracking accuracy, providing insights into practical applications of induction motor DTC systems.