Simulink Simulation of Direct Torque Control System for Permanent Magnet Synchronous Motors

Simulink is a widely used software for control system design and simulation. This article demonstrates how to design and simulate a direct torque control (DTC) system for permanent magnet synchronous motors (PMSM) using Simulink. PMSM motors are known for their high efficiency, strong controllability, and fast response, making them suitable for applications like wind power generation, electric vehicles, and rail transportation. Direct torque control represents an advanced motor control technique that delivers exceptional performance in regulating PMSM torque and speed. The implementation typically involves using Simulink blocks to model switching tables, hysteresis comparators, and flux/torque estimators, with core functions like Lookup Tables and PID Controllers for real-time regulation.

This guide details Simulink modeling techniques, including system configuration, parameter tuning for motor characteristics (e.g., stator resistance and inductance), and simulation execution. We also explain fundamental PMSM principles and DTC operational mechanisms, such as the algorithm's flux vector control through voltage source inverter switching states. Readers will gain practical experience in building DTC systems through hands-on modeling exercises, learning to implement coordinate transformations and pulse-width modulation (PWM) strategies using Simulink's Simscape Electrical components. The acquired skills will enable engineers to apply these techniques to custom control system designs.