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Modeling of High-Tc Superconducting Bulk using Different Jc-T Relationships over Dynamic Permanent Magnet Guideway.
Materials (Basel) 2019; 12(18)M

Abstract

The linear temperature dependence of critical current density Jc∝((Tc-T)/(Tc-T0)) and the nonlinear functions of Jc∝(1-(T/Tc)2)α with the exponent α equal to 1, 3/2, and 2 are used to calculate the dynamic levitation force, the temperature distribution, and the current density distribution of the high-temperature superconducting (HTS) YBaCuO bulk over a permanent magnetic guideway (PMG). The calculations were based on the H-formulation and E-J power law. The model of the HTS bulk and the PMG has been built as a geometric entity by finite element software. To simulate the magnetic field fluctuation caused by the PMG arrangement irregularity, a small amplitude vibration in the vertical direction is applied to the PMG during the calculations. Both the low vibration frequency of 2 Hz and the high vibration frequency of 60 Hz are analyzed as the representative converted linear speeds of 34 km/h and 1018 km/h for magnetic levitation (Maglev) application. We compared the electromagnetic-thermo-force modeling with the experiments and the previous model without considering the thermal effect. The levitation force computed by the Jc-T relationship, in which Jc is proportional to (1-(T/Tc)2)2, is found to be in best agreement with the experimental data under quasi-static conditions. This work can provide a reference for the HTS electromagnetic-thermal-force coupling reproduction method of HTS Maglev at high speed.

Authors+Show Affiliations

Applied Superconductivity Laboratory, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China.Applied Superconductivity Laboratory, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China. jzheng@swjtu.edu.cn.Applied Superconductivity Laboratory, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31505813

Citation

Hong, Ye, et al. "Modeling of High-Tc Superconducting Bulk Using Different Jc-T Relationships Over Dynamic Permanent Magnet Guideway." Materials (Basel, Switzerland), vol. 12, no. 18, 2019.
Hong Y, Zheng J, Liao H. Modeling of High-Tc Superconducting Bulk using Different Jc-T Relationships over Dynamic Permanent Magnet Guideway. Materials (Basel). 2019;12(18).
Hong, Y., Zheng, J., & Liao, H. (2019). Modeling of High-Tc Superconducting Bulk using Different Jc-T Relationships over Dynamic Permanent Magnet Guideway. Materials (Basel, Switzerland), 12(18), doi:10.3390/ma12182915.
Hong Y, Zheng J, Liao H. Modeling of High-Tc Superconducting Bulk Using Different Jc-T Relationships Over Dynamic Permanent Magnet Guideway. Materials (Basel). 2019 Sep 9;12(18) PubMed PMID: 31505813.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Modeling of High-Tc Superconducting Bulk using Different Jc-T Relationships over Dynamic Permanent Magnet Guideway. AU - Hong,Ye, AU - Zheng,Jun, AU - Liao,Hengpei, Y1 - 2019/09/09/ PY - 2019/07/31/received PY - 2019/09/05/revised PY - 2019/09/06/accepted PY - 2019/9/12/entrez PY - 2019/9/12/pubmed PY - 2019/9/12/medline KW - electromagnetic-thermo-force coupling KW - high speed KW - high-temperature superconducting bulk KW - magnetic levitation KW - modeling JF - Materials (Basel, Switzerland) JO - Materials (Basel) VL - 12 IS - 18 N2 - The linear temperature dependence of critical current density Jc∝((Tc-T)/(Tc-T0)) and the nonlinear functions of Jc∝(1-(T/Tc)2)α with the exponent α equal to 1, 3/2, and 2 are used to calculate the dynamic levitation force, the temperature distribution, and the current density distribution of the high-temperature superconducting (HTS) YBaCuO bulk over a permanent magnetic guideway (PMG). The calculations were based on the H-formulation and E-J power law. The model of the HTS bulk and the PMG has been built as a geometric entity by finite element software. To simulate the magnetic field fluctuation caused by the PMG arrangement irregularity, a small amplitude vibration in the vertical direction is applied to the PMG during the calculations. Both the low vibration frequency of 2 Hz and the high vibration frequency of 60 Hz are analyzed as the representative converted linear speeds of 34 km/h and 1018 km/h for magnetic levitation (Maglev) application. We compared the electromagnetic-thermo-force modeling with the experiments and the previous model without considering the thermal effect. The levitation force computed by the Jc-T relationship, in which Jc is proportional to (1-(T/Tc)2)2, is found to be in best agreement with the experimental data under quasi-static conditions. This work can provide a reference for the HTS electromagnetic-thermal-force coupling reproduction method of HTS Maglev at high speed. SN - 1996-1944 UR - https://www.unboundmedicine.com/medline/citation/31505813/Modeling_of_High-Tc_Superconducting_Bulk_using_Different_Jc-T_Relationships_over_Dynamic_Permanent_Magnet_Guideway L2 - http://www.mdpi.com/resolver?pii=ma12182915 DB - PRIME DP - Unbound Medicine ER -
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