Calculation and comparison of HTS electromagnetic characteristics with different models

• Published in: Physica. C, Superconductivity Superconductivity, 2021-10, Vol.589, p.1353930, Article 1353930
• Main Authors: Mu, Shuai, Jin, Jian Xun, Zhang, Run Tao, Yang, Ruo Huan, Wang, Li Na, Zhang, Tian Long, Wang, Jian
• Format: Article
• Language: English
• Subjects: AC loss; Computational efficiency; Computing time; Electromagnetic properties; Electromagnetics; Energy efficiency; Finite element analysis; Finite element method; H-formulation; High temperature superconductor (HTS); High temperature superconductors; HTS electromagnetic characteristics; Mathematical analysis; Model accuracy; Numerical analysis; T-A formulation
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2021.1353930

•H-formulation and T-A formulation are mainly two principal formulations applied to the finite element method to analyze the electromagnetic characteristics of HTS materials and devices. It is necessary to verify and to conduct a comparison of different effects of element order, mesh number along the width, and thickness expansion, with regard to calculation efficiency and accuracy under H model and T-A model respectively. Analysis of different models has been presented in detail. The optimal configurations of different models have been verified to meet the need of large-scale HTS equipment design in terms of calculation efficiency and accuracy. To ensure the effective design and operation of high-temperature-superconducting (HTS) devices, the electromagnetic properties of HTS materials attract widespread attention. To date, the H-formulation and T-A formulation are two principal formulations applied to the finite element method to analyze the electromagnetic characteristics of HTS materials and devices. It is necessary to verify and to conduct a comparison of different effects of element order, mesh number along the width, and thickness expansion, with regard to calculation efficiency and accuracy under the H model and T-A model respectively. Compared to the H model, the T-A model with linear or quadratic element order can complete the calculation process more efficient having high accuracy and less time. The model with optimal parameters has been verified in a common case of a superconducting pancake coil. The optimal model of this work benefits to design or simulate HTS applications in building practical large-scale devices in terms of calculation efficiency and accuracy.