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Research on Bitter-like HTS Magnet Energized by Flux Pump with Single Thermal Switch

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Abstract

High-temperature superconducting (HTS) tapes are gradually developed in superconducting magnets with a high magnetic field with commercialization of 2G HTS tapes in recent years. However, persistent current mode (PCM) is a challenge to realize in HTS magnets because of the poor soldering technique. Bitter-like HTS magnet is a kind of magnet promising to overcome such drawbacks, which consists of REBCO plates and magnetized by flux pump or field cooling (FC). A Bitter-like HTS magnet is designed and manufactured by rectangle HTS plates excited by flux pump with single thermal switch. An experiment is performed at 77 K to validate its excitation properties. Meanwhile, theoretical analysis is presented to account for the electromagnetic properties and verified by simulation results. As a typical experimental phenomenon, flux-flow resistance is utilized to describe the property of current relaxation, which is part of the experimental results in this paper. Results show a Bitter-like HTS magnet composed of rectangle plates can achieve the PCM operation with flux pump and single thermal switch, which avoids the soldering bottleneck in comparison with the conventional HTS magnets. At the same time, flux-flow resistance has a particular influence on the distribution of the magnetic fields.

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Acknowledgements

This work is supported in part by the National Natural Science Foundation of China under Grant No. 51977078.

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Author notes

  1. Jiawen Wang, Zhenghao Huang, Xindan Zhang, and Wei Pi contributed equally to this work.

Authors and Affiliations

  1. State Key Lab. of New Energy Renewable Power System, North China Electric Power University, Beijing, China

    Jiawen Wang & Yinshun Wang

  2. Key Lab of HV and EMC Beijing Electrical, North China Electric Power University, Beijing, China

    Zhenghao Huang, Xindan Zhang & Wei Pi

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  1. Jiawen Wang
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  2. Yinshun Wang
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  3. Zhenghao Huang
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  4. Xindan Zhang
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Correspondence to Yinshun Wang.

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Wang, J., Wang, Y., Huang, Z. et al. Research on Bitter-like HTS Magnet Energized by Flux Pump with Single Thermal Switch. J Supercond Nov Magn 35, 3309–3316 (2022). https://doi.org/10.1007/s10948-022-06389-0

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  • DOI: https://doi.org/10.1007/s10948-022-06389-0

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