Simulation of Direct Torque Control for Induction Motor Using Two-Level Inverter

This paper presents a simulation study of direct torque control for induction motors implemented on two-level inverters. To enhance the conventional direct torque control algorithm, we integrated a typical improvement technique called Discrete Space Vector Modulation (DSVM) and conducted comprehensive simulation experiments. The implementation involves MATLAB/Simulink modeling where the DSVM algorithm calculates optimal voltage vectors by subdividing the basic voltage vector sectors, thereby generating more precise switching patterns.

Our research yielded significant findings. The DSVM algorithm substantially improves direct torque control performance by implementing sophisticated sector subdivision logic and voltage vector selection mechanisms. This approach enables more accurate torque regulation while enhancing system stability and dynamic response characteristics through optimized switching frequency control.

Furthermore, we performed detailed analysis and discussion of simulation results. The implementation demonstrates that motor torque response becomes smoother with DSVM algorithm, showing better tracking capability of reference torque commands. The code structure includes torque and flux hysteresis comparators combined with DSVM-based switching table optimization, which is crucial for practical motor control applications requiring precise torque dynamics.

In conclusion, our simulation results confirm that the enhanced DSVM-based direct torque control algorithm effectively improves induction motor performance. This study provides valuable insights and guidance for engineers and researchers in motor drive applications, particularly those working with vector control implementations and power electronics integration.