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<p>This study proposes a dual helical winding (DHW) topology for dual-mover spoke-type permanent magnet linear synchronous machines (PMLSMs) to address uneven air-gap flux distribution and excessive thrust ripple commonly observed in conventional teeth-concentrated winding (TCW) designs. To evaluate the proposed topology, key design parameters, the stator yoke length and the mover skew angle, were analyzed. The analysis employed the three-dimensional finite element method (3D FEM) and a quasi-three-dimensional FEM (Q3D FEM) with end-effect compensation, enabling accurate prediction while reducing computational cost. The results indicate that the DHW model outperformed the TCW model, delivering higher thrust force and lower thrust ripple across various parameter variations, while optimized skew application further enhanced performance. The Q3D FEM results were consistent with the 3D FEM predictions within a 5% deviation, confirming both accuracy and efficiency in performance evaluation. These findings demonstrate the potential of the DHW topology as an effective winding strategy for high-performance, compact linear drive systems that require high thrust density and smooth operation.</p>

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Thrust Ripple Suppression in Spoke-Type Permanent-Magnet Linear Synchronous Machine with Dual Helical Winding

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Jong-Seok Seon,
  • Hyeon-Taek Oh,
  • Han-Kyeol Yeo

摘要

This study proposes a dual helical winding (DHW) topology for dual-mover spoke-type permanent magnet linear synchronous machines (PMLSMs) to address uneven air-gap flux distribution and excessive thrust ripple commonly observed in conventional teeth-concentrated winding (TCW) designs. To evaluate the proposed topology, key design parameters, the stator yoke length and the mover skew angle, were analyzed. The analysis employed the three-dimensional finite element method (3D FEM) and a quasi-three-dimensional FEM (Q3D FEM) with end-effect compensation, enabling accurate prediction while reducing computational cost. The results indicate that the DHW model outperformed the TCW model, delivering higher thrust force and lower thrust ripple across various parameter variations, while optimized skew application further enhanced performance. The Q3D FEM results were consistent with the 3D FEM predictions within a 5% deviation, confirming both accuracy and efficiency in performance evaluation. These findings demonstrate the potential of the DHW topology as an effective winding strategy for high-performance, compact linear drive systems that require high thrust density and smooth operation.