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Oscillation Characteristics of HTS Maglev Under Strong Magnetic Field Fluctuations

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Abstract

The high Tc-superconducting maglev system relies on the diamagnetic and magnetic flux pinning characteristics of the superconductor in a magnetic field; its performance is closely related to the uniformity of the magnetic field along the magnetic track. How the amplitude of magnetic field fluctuations on the stability and dynamic behavior of magnetic levitation is still an open issue so far. In this paper, a large magnetic field fluctuation (∆Bz) with an adjustable fluctuation amplitude was generated by covering the silicon steel sheet on the magnetic track, which was superimposed on the original small fluctuating magnetic field (δBz) along the permanent magnetic track. Based on this platform, we have studied the combined influence of ∆Bz and ∆Bz on the dynamic characteristics of the magnetic levitation system. Very significant levitation oscillation behavior was found with its amplitude linearly varying with the magnetic fluctuation amplitude. However, the dynamical behavior of the levitation was governed by the cooperation of two driving forces of different characteristic frequencies, presenting a periodical motion to a period-doubling bifurcation, and finally evolving into a chaotic state under certain conditions.

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Funding

This work was supported in part by the Industrial Guidance (Key) Project of Fujian Science and Technology Department (Grant No. 2020H0013), Sichuan Applied Basic Research Project under Grant 2018JY0003, and the Open Project of the Key Laboratory of Maglev Train and Maglev Technology, Ministry of Education of China.

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Authors and Affiliations

  1. Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fujian Normal University, Fuzhou, 350117, China

    Yong Zhao & Dajin Zhou

  2. College of Physics and Energy, Fujian Normal University, Fuzhou, 350117, China

    Yong Zhao & Dajin Zhou

  3. Key Laboratory of Magnetic Levitation Technologies and Maglev Trains, School of Electric Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Yong Zhao, Dongyang Lin, Feinan Cai, Changwei Ji, Lifeng Zhao, Cuihua Cheng & Yong Zhang

  4. Superconductivity and New Energy R&D Center, Southwest Jiaotong University, Chengdu, 610031, China

    Yong Zhao, Dongyang Lin, Feinan Cai, Changwei Ji, Lifeng Zhao, Cuihua Cheng & Yong Zhang

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  1. Yong Zhao
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  2. Dongyang Lin
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  3. Feinan Cai
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  4. Changwei Ji
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  5. Lifeng Zhao
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  7. Cuihua Cheng
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  8. Yong Zhang
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Correspondence to Yong Zhao or Dajin Zhou.

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Zhao, Y., Lin, D., Cai, F. et al. Oscillation Characteristics of HTS Maglev Under Strong Magnetic Field Fluctuations. J Supercond Nov Magn 35, 359–372 (2022). https://doi.org/10.1007/s10948-021-06080-w

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  • DOI: https://doi.org/10.1007/s10948-021-06080-w

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