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<p>To address the issue of speed instability in low-speed mining belt conveyors caused by load variations, this paper designs a novel water-cooled permanent magnet governor (WPMG). This device uses the principle of eddy current speed regulation, offering benefits such as low-speed high torque, no friction, and adjustable speed. To evaluate the performance of the WPMG, a speed regulation-electromagnetic-temperature coupling mathematical model is proposed. This mathematical model is based on the layer theory model and heat transfer theory of the two-dimensional scalar magnetic potential method, realizing the coupling of speed regulation, electromagnetic, and temperature. The proposed analytical model is used to analyze the changes in torque and conductor barrel temperature rise with rotational speed, as well as the variations in torque and rotational speed during the speed regulation process. Furthermore, a multi-physics field-coupled finite element analysis model is established. The results from the analytical method, the 3D finite element method (3D FEM), and experimental testing are compared, with the analytical results showing errors within 10%. These findings demonstrate that the proposed speed regulation-electromagnetic-temperature coupling mathematical model is suitable for practical engineering applications.</p>

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Performance Analysis and Experimental Study of Water-Cooled, Low-Speed, Permanent Magnet Speed-Regulating Devices

  • 期刊论文

  • 发表日期：

    2025年7月14日

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  • Lezhi Ye,
  • Congcong Yu

摘要

To address the issue of speed instability in low-speed mining belt conveyors caused by load variations, this paper designs a novel water-cooled permanent magnet governor (WPMG). This device uses the principle of eddy current speed regulation, offering benefits such as low-speed high torque, no friction, and adjustable speed. To evaluate the performance of the WPMG, a speed regulation-electromagnetic-temperature coupling mathematical model is proposed. This mathematical model is based on the layer theory model and heat transfer theory of the two-dimensional scalar magnetic potential method, realizing the coupling of speed regulation, electromagnetic, and temperature. The proposed analytical model is used to analyze the changes in torque and conductor barrel temperature rise with rotational speed, as well as the variations in torque and rotational speed during the speed regulation process. Furthermore, a multi-physics field-coupled finite element analysis model is established. The results from the analytical method, the 3D finite element method (3D FEM), and experimental testing are compared, with the analytical results showing errors within 10%. These findings demonstrate that the proposed speed regulation-electromagnetic-temperature coupling mathematical model is suitable for practical engineering applications.