Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent
Non-insulation high-temperature superconducting coils provide a much lower risk of burnout in fault/abnormal conditions, such as hot-spot quench and overcurrent. This study employs an equivalent circuit grid model, coupled with magnetic field calculation and the <i>E</i>–<i>J</i...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/10/22/2789 |
| _version_ | 1797510526227447808 |
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| author | Wei Wu Yusong Gao Zhijian Jin |
| author_facet | Wei Wu Yusong Gao Zhijian Jin |
| author_sort | Wei Wu |
| collection | DOAJ |
| description | Non-insulation high-temperature superconducting coils provide a much lower risk of burnout in fault/abnormal conditions, such as hot-spot quench and overcurrent. This study employs an equivalent circuit grid model, coupled with magnetic field calculation and the <i>E</i>–<i>J</i> power law of superconductors, to deeply and systematically investigate the overcurrent charging process in a double-pancake non-insulation coil. An evident saturation of the magnetic field in the axial direction of the coil was observed and verified by experiments. Experimentally, the entire process, including the behavior of the magnetic field, was consistent with the numerical results. Based on the verified model, two main points were addressed: (1) Transient current distribution inside the coil during overcurrent charging was studied. Potential quenching risks were found to be at the innermost and outermost turn near the electrodes, as well as the pancake-to-pancake connection part. (2) Magnetic field saturation, which is a unique phenomenon in non-insulation superconducting coils during overcurrent charging, was studied in detail and first quantitatively defined by a new concept “converged load factor”. Its relationship with turn-to-turn resistivity was revealed. |
| first_indexed | 2024-03-10T05:33:31Z |
| format | Article |
| id | doaj.art-9e5fc6c2eba849428098e3f61c199472 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T05:33:31Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-9e5fc6c2eba849428098e3f61c1994722023-11-22T23:07:08ZengMDPI AGElectronics2079-92922021-11-011022278910.3390/electronics10222789Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during OvercurrentWei Wu0Yusong Gao1Zhijian Jin2School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaSchool of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaNon-insulation high-temperature superconducting coils provide a much lower risk of burnout in fault/abnormal conditions, such as hot-spot quench and overcurrent. This study employs an equivalent circuit grid model, coupled with magnetic field calculation and the <i>E</i>–<i>J</i> power law of superconductors, to deeply and systematically investigate the overcurrent charging process in a double-pancake non-insulation coil. An evident saturation of the magnetic field in the axial direction of the coil was observed and verified by experiments. Experimentally, the entire process, including the behavior of the magnetic field, was consistent with the numerical results. Based on the verified model, two main points were addressed: (1) Transient current distribution inside the coil during overcurrent charging was studied. Potential quenching risks were found to be at the innermost and outermost turn near the electrodes, as well as the pancake-to-pancake connection part. (2) Magnetic field saturation, which is a unique phenomenon in non-insulation superconducting coils during overcurrent charging, was studied in detail and first quantitatively defined by a new concept “converged load factor”. Its relationship with turn-to-turn resistivity was revealed.https://www.mdpi.com/2079-9292/10/22/2789high-temperature superconductornon-insulation coilovercurrentnumerical modelingmagnetic field saturation |
| spellingShingle | Wei Wu Yusong Gao Zhijian Jin Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent Electronics high-temperature superconductor non-insulation coil overcurrent numerical modeling magnetic field saturation |
| title | Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent |
| title_full | Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent |
| title_fullStr | Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent |
| title_full_unstemmed | Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent |
| title_short | Magnetic Field Saturation of Non-Insulation High-Temperature Superconducting Coils during Overcurrent |
| title_sort | magnetic field saturation of non insulation high temperature superconducting coils during overcurrent |
| topic | high-temperature superconductor non-insulation coil overcurrent numerical modeling magnetic field saturation |
| url | https://www.mdpi.com/2079-9292/10/22/2789 |
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