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<p>With the development of the new power system towards ultra-high voltage and large capacity, the noise pollution problem of power transformers has become increasingly prominent. Studies show most of the noise in large power transformers comes from the magnetostrictive effect of the core material. This paper conducts experimental measurement, model establishment and verification research on the magnetostrictive characteristics of oriented silicon steel. The magnetic characteristics of B27R090, B18R060 and 30Q120 were measured by using the single-chip measurement method and laser Doppler vibration measurement technology, and the hysteresis loops and magnetostrictive curves at different excitation frequencies such as the third harmonic and compressive stress were obtained. Based on the dynamic Jiles-Atherton model, by introducing the even power combination of irreversible magnetization terms, a dynamic magnetostrictive model with the magnetic induction intensity as the independent variable was established. Then, the dynamic inertial particle swarm optimization algorithm was used to identify the 11 parameters of four types of silicon steel sheets. The accuracy of the magnetic characteristics after identification is all above 90%. Finally, a force-magnetic coupling model was established and validated under 1.5&#xa0;MPa and 2&#xa0;MPa compressive stresses, showing a deviation of less than 5% from measured results. The research results provide theoretical support for the prediction of vibration and noise of transformer cores.</p>

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Modeling and experimental characterization of magnetostriction in oriented silicon steel using a dynamic Jiles-Atherton framework

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月12日

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  • Tianqi Liu,
  • Wenchao Wang,
  • Huimin Ma,
  • Wenjing Geng,
  • Zhou Wang

摘要

With the development of the new power system towards ultra-high voltage and large capacity, the noise pollution problem of power transformers has become increasingly prominent. Studies show most of the noise in large power transformers comes from the magnetostrictive effect of the core material. This paper conducts experimental measurement, model establishment and verification research on the magnetostrictive characteristics of oriented silicon steel. The magnetic characteristics of B27R090, B18R060 and 30Q120 were measured by using the single-chip measurement method and laser Doppler vibration measurement technology, and the hysteresis loops and magnetostrictive curves at different excitation frequencies such as the third harmonic and compressive stress were obtained. Based on the dynamic Jiles-Atherton model, by introducing the even power combination of irreversible magnetization terms, a dynamic magnetostrictive model with the magnetic induction intensity as the independent variable was established. Then, the dynamic inertial particle swarm optimization algorithm was used to identify the 11 parameters of four types of silicon steel sheets. The accuracy of the magnetic characteristics after identification is all above 90%. Finally, a force-magnetic coupling model was established and validated under 1.5 MPa and 2 MPa compressive stresses, showing a deviation of less than 5% from measured results. The research results provide theoretical support for the prediction of vibration and noise of transformer cores.