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<p>This study presents an advanced <i>q</i>-axis current-independent feedback system design technique for permanent magnet synchronous motors (PMSMs), which robustly regulate speed and <i>d</i>-axis current in the presence of model-plant mismatches. The contributions of this study are summarized as follows: 1) model-independent pole-zero cancellation (PZC) filters for the position, speed, acceleration, and <i>d</i>-axis current, to improve closed-loop accuracy; 2) simple filter-based double integral control laws for speed and <i>d</i>-axis current, involving feed-forward terms by the filtered signals and disturbance observers; and 3) assignment of the critically damped transfer function to the closed-loop system through high-order PZC technique for the feedback system gains. An experimental study with a 700-W PMSM dynamo validates the practical effectiveness of the beneficial closed-loop analysis results.</p>

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Critical Damping Double Integral Control for PMSM Speed Control Applications via Order Reduction Technique

  • 期刊论文

  • 发表日期：

    2025年1月13日

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  • Sang-Hyuk Lee,
  • Seok-Kyoon Kim,
  • Kyo-Beum Lee

摘要

This study presents an advanced q-axis current-independent feedback system design technique for permanent magnet synchronous motors (PMSMs), which robustly regulate speed and d-axis current in the presence of model-plant mismatches. The contributions of this study are summarized as follows: 1) model-independent pole-zero cancellation (PZC) filters for the position, speed, acceleration, and d-axis current, to improve closed-loop accuracy; 2) simple filter-based double integral control laws for speed and d-axis current, involving feed-forward terms by the filtered signals and disturbance observers; and 3) assignment of the critically damped transfer function to the closed-loop system through high-order PZC technique for the feedback system gains. An experimental study with a 700-W PMSM dynamo validates the practical effectiveness of the beneficial closed-loop analysis results.