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In order to improve the tracking performance of the permanent magnet synchronous motor (PMSM) speed regulation system, an improved non-singular fast terminal sliding mode speed controller (INFTSM) is proposed. The modified variable exponential reach law (MVERL) based INFTSM speed controller is designed to solve the contradiction between the system response speed and chattering. The MVEAL includes the variable gain term and power term of the system state variable in the conventional exponential reaching law (CERL), which not only reduces the time for the system state to reach the sliding mode surface but also weakens chattering. Simulation results show that the method has the advantages of fast convergence and small chattering.

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An Improved Nonsingular Fast Terminal Sliding Mode Controller for PMSM Drive System

  • 会议论文

  • 发表日期：

    2025年

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  • Kaiyang Wu,
  • Xin Wang,
  • Bo Xu,
  • Wei Ji,
  • Shihong Ding,
  • Yongqi Jiang,
  • Yonggui Zha

摘要

In order to improve the tracking performance of the permanent magnet synchronous motor (PMSM) speed regulation system, an improved non-singular fast terminal sliding mode speed controller (INFTSM) is proposed. The modified variable exponential reach law (MVERL) based INFTSM speed controller is designed to solve the contradiction between the system response speed and chattering. The MVEAL includes the variable gain term and power term of the system state variable in the conventional exponential reaching law (CERL), which not only reduces the time for the system state to reach the sliding mode surface but also weakens chattering. Simulation results show that the method has the advantages of fast convergence and small chattering.