Simulation Research on Direct Torque Control of Asynchronous Motors based on MATLAB

Abstract

The direct torque control (DTC) technology of asynchronous motors, with its excellent dynamic response performance and simple control structure, has become the core research direction in the field of high-performance AC speed regulation. This paper deeply explores the basic theory of direct torque control, establishes the mathematical model of asynchronous motors in the stator coordinate system, and builds a complete simulation system using the MATLAB/Simulink environment. By introducing the flux observer, torque hysteresis comparator, and optimal switching table, the decoupling control of motor torque and flux is achieved. Experimental results show that this system exhibits strong robustness when subjected to sudden load changes and drastic variations in speed, effectively overcoming the complex coordinate transformation and strong parameter dependence problems in traditional vector control. The research in this paper provides theoretical references and simulation basis for optimizing the torque pulsation problem of the DTC system.