Performance Improvement of YBCO Coil for High-Field HTS-SMES Based on Homogenized Distribution of Magnetically-Mechanically Influenced Critical Current
- 6 June 2008
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Applied Superconductivity
- Vol. 18 (2), 758-761
- https://doi.org/10.1109/tasc.2008.921890
Abstract
Generally speaking for a HTS coil, perpendicular magnetic field to conductor's broad surface should be suppressed as small as possible in relation to the magnetic anisotropy. This is a reason why toroidal coil with relatively many elementary coils is expected for HTS-SMES. On the other hand, from the point of view of the homogenization of critical current distribution in the coil, perpendicular field and parallel field should be balanced corresponding to the ratio of the magnetic anisotropy. This means that a certain level of the perpendicular field is effective to reduce local heat generation in the coil. Furthermore, this concept is especially reasonable for a high-field coil with usual winding method (flat-wise winding) because the perpendicular field does not induce hoop stress which decreases the critical current. In this paper, we show these findings through an optimal design of a MOCVD-YBCO toroidal coil for 2 GJ class SMES taking account of magnetically and mechanically influenced J - E characteristics.Keywords
This publication has 18 references indexed in Scilit:
- Critical currents versus applied strain for industrial Y-123 coated conductors at various temperatures and magnetic fields up to 19 TSuperconductor Science and Technology, 2006
- Mechanical properties of pure Ni and Ni-alloy substrate materials for Y–Ba–Cu–O coated superconductorsCryogenics, 2006
- An Optimal Configuration Design Method for HTS-SMES CoilsIEEE Transactions on Applied Superconductivity, 2005
- Critical current properties in HTS tapesPhysica C: Superconductivity and its Applications, 2003
- Curitical Current Properties of a YBCO Coated Conductor in High Magnetic FieldsIEEJ Transactions on Fundamentals and Materials, 2003
- Angular dependence ofE–Jcharacteristics and dissipative properties in Bi-2223/Ag tapeSuperconductor Science and Technology, 2002
- Anisotropy of critical current and glass-liquid transition flux density in Bi-2223/Ag tapeSuperconductor Science and Technology, 2000
- Critical Current Properties in High Tc Superconductors.Teion Kogaku (Journal of Cryogenics and Superconductivity Society of Japan), 1999
- Current-voltage characteristics near the glass-liquid transition in high-Tc superconductorsPhysica C: Superconductivity and its Applications, 1997
- Transport characteristics and flux dynamics in high T/sub c/ superconductors under the influence of pin fluctuationIEEE Transactions on Applied Superconductivity, 1997