Electromagnetic field analysis of rectangular high T-c superconductor with large aspect ratio

摘要

AC loss reduction can substantially influence the economic feasibility of superconducting power devices. For AC loss reduction, understanding the AC loss characteristics of high T-c superconductors is essentially required, and numerical electromagnetic field analysis of high T-c superconductors is very useful tool for this purpose because the electromagnetic phenomena inside the superconductors can be visualized. This work focuses on electromagnetic field analysis of rectangular high T-c superconductors with a large aspect ratio. A numerical code based on the finite element method was tuned to perform electromagnetic field analysis of high T-c superconductors with a large aspect ratio. The optimization of mesh systems is required for accurate and efficient numerical analysis. AC losses in high Tc superconductors with AC transport current and/or an AC external magnetic field are estimated through numerical analysis. The numerically calculated AC losses are compared with analytical values at several reference points to study the validity and error of the numerical analysis. (C) 2004 Elsevier B.V. All rights reserved.