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Induction motors (IMs) play a vital role in various industrial applications, and as a result, their control techniques have garnered significant interest. Among these techniques, Direct Torque Control (DTC) has emerged as a widely accepted practice due to its exceptional performance in terms of torque under dynamic conditions, resilience to variations in machine parameters, and overall simplicity. In recent years, multilevel inverters have gained prominence owing to superior harmonic performance, reduced device voltage ratings for achieving increased output voltage, and improved overall efficiency. This paper focuses on exploring the viability of utilizing a DTC technique to decrease torque ripple (TR) in IMs by including a Neutral point clamped (NPC) three-level inverter (TLI) with a reduced number of switches. By combining the benefits of DTC and the enhanced characteristics of multilevel inverters, this study aims to investigate the potential of achieving TR reduction in IMs through this novel approach. By minimizing the number of switches employed, the proposed method achieves three-voltage levels, effectively reducing TR and preserving the desirable attributes of the conventional TLI technique, including swift responsiveness and enhanced efficiency. To validate the efficacy of the proposed method, a comprehensive performance analysis is conducted on the MATLAB/SIMULINK platform, contrasting its TR and Total Harmonic Distortion (THD) with those of traditional DTC methods utilizing NPC-TLI.

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Novel Multilevel Inverter Topology for Torque Ripple Reduction Through Direct Torque Control Technique

  • 会议论文

  • 发表日期：

    2025年

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  • Ahna S Fathima,
  • M. Roykumar,
  • Elizabeth Cherian

摘要

Induction motors (IMs) play a vital role in various industrial applications, and as a result, their control techniques have garnered significant interest. Among these techniques, Direct Torque Control (DTC) has emerged as a widely accepted practice due to its exceptional performance in terms of torque under dynamic conditions, resilience to variations in machine parameters, and overall simplicity. In recent years, multilevel inverters have gained prominence owing to superior harmonic performance, reduced device voltage ratings for achieving increased output voltage, and improved overall efficiency. This paper focuses on exploring the viability of utilizing a DTC technique to decrease torque ripple (TR) in IMs by including a Neutral point clamped (NPC) three-level inverter (TLI) with a reduced number of switches. By combining the benefits of DTC and the enhanced characteristics of multilevel inverters, this study aims to investigate the potential of achieving TR reduction in IMs through this novel approach. By minimizing the number of switches employed, the proposed method achieves three-voltage levels, effectively reducing TR and preserving the desirable attributes of the conventional TLI technique, including swift responsiveness and enhanced efficiency. To validate the efficacy of the proposed method, a comprehensive performance analysis is conducted on the MATLAB/SIMULINK platform, contrasting its TR and Total Harmonic Distortion (THD) with those of traditional DTC methods utilizing NPC-TLI.