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第二代高温超导线圈在外部磁场下的临界电流模拟与测量

Critical Current Simulation and Measurement of Second Generation, High-Temperature Superconducting Coil under External Magnetic Field.

作者信息

Yu Dongmin, Liu Huanan, Zhang Xinhe, Gong Taorong

机构信息

Department of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China.

China Electric Power Research Institute, Beijing 100192, China.

出版信息

Materials (Basel). 2018 Feb 26;11(3):339. doi: 10.3390/ma11030339.

DOI:10.3390/ma11030339
PMID:29495386
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5872918/
Abstract

This paper studies the critical current of second generation, high temperature superconducting coils under an external magnetic field experimentally and numerically. Two identical coils with different coated conductors are fabricated and tested under a direct current (DC) magnetic field along the axis of the coil. Then, a numerical model in cylindrical coordinates based on a sheet current model is built by taking the measured magnetic field dependency to analyze the current distribution and magnetic field distribution. The simulated critical currents of the coils under the DC magnetic field have good agreement with the measured results. We find that under the in-phase field, the critical current decreases as the magnetic field in the innermost turn is enhanced by the external field. Meanwhile, the anti-phase external field increases the critical current a bit at first, then decreases the critical current. We further discuss the critical current criteria of the coils, showing that the parallel field plays a more important role in critical current determination.

摘要

本文通过实验和数值方法研究了第二代高温超导线圈在外部磁场下的临界电流。制作了两个采用不同涂层导体的相同线圈，并在沿线圈轴线的直流（DC）磁场下进行测试。然后，基于片电流模型，在圆柱坐标系中建立了一个数值模型，通过考虑测量的磁场依赖性来分析电流分布和磁场分布。直流磁场下线圈的模拟临界电流与测量结果吻合良好。我们发现，在同相场下，随着外部磁场增强最内匝的磁场，临界电流会降低。同时，反相外部磁场起初会使临界电流略有增加，然后使其降低。我们进一步讨论了线圈的临界电流准则，表明平行场在临界电流确定中起着更重要的作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/4c42e2c64b1f/materials-11-00339-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/45affd5ca333/materials-11-00339-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/7a80e4107580/materials-11-00339-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/a919dd0894c3/materials-11-00339-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/3c03ebd0d6ee/materials-11-00339-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/a8e09b48c449/materials-11-00339-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/d35c6376d76d/materials-11-00339-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/4c42e2c64b1f/materials-11-00339-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/b7e87aa244b4/materials-11-00339-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/efa60f1209dd/materials-11-00339-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/5543760289ca/materials-11-00339-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/64e3cd956759/materials-11-00339-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/e8618a53f8fa/materials-11-00339-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/d5da5dbcf96d/materials-11-00339-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/45affd5ca333/materials-11-00339-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/7a80e4107580/materials-11-00339-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/a919dd0894c3/materials-11-00339-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/3c03ebd0d6ee/materials-11-00339-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/a8e09b48c449/materials-11-00339-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/d35c6376d76d/materials-11-00339-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1c37/5872918/4c42e2c64b1f/materials-11-00339-g013.jpg

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本文引用的文献

1
Progresses and challenges in the development of high-field solenoidal magnets based on RE123 coated conductors.基于RE123涂层导体的高场螺线管磁体开发的进展与挑战
Supercond Sci Technol. 2014;27(10). doi: 10.1088/0953-2048/27/10/103001. Epub 2014 Sep 19.