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<p>This study focuses on two major drawbacks of eddy current damper (ECD) in vehicle suspension systems: thermal damping attenuation and impact-induced demagnetization. A transient finite element model for the coupling of electromagnetic and temperature fields was established, and its validity was verified through impact tests under multiple working conditions. With the damping force adopted as the key evaluation index, the simulation error was controlled within 4 %. The results indicate that when the temperature rises to 45 °C, the damping force attenuation rate reaches 8 %. Additionally, under impact conditions, the eddy current effect of the permanent magnet is enhanced, causing the magnetic flux lines to be squeezed into the internal magnetic circuit and leading to demagnetization.</p>

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Electromagnetic thermal characteristics and demagnetization mechanism of eddy current dampers under strong shock conditions

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Yundong Chen,
  • Zixuan Li,
  • Xuexuan Tao,
  • Jingru Yang,
  • Yi Wu,
  • Zhiyi Wei,
  • Panpan Yang,
  • Zonggao Mu

摘要

This study focuses on two major drawbacks of eddy current damper (ECD) in vehicle suspension systems: thermal damping attenuation and impact-induced demagnetization. A transient finite element model for the coupling of electromagnetic and temperature fields was established, and its validity was verified through impact tests under multiple working conditions. With the damping force adopted as the key evaluation index, the simulation error was controlled within 4 %. The results indicate that when the temperature rises to 45 °C, the damping force attenuation rate reaches 8 %. Additionally, under impact conditions, the eddy current effect of the permanent magnet is enhanced, causing the magnetic flux lines to be squeezed into the internal magnetic circuit and leading to demagnetization.