自场下高温超导MCP BSCCO-2212电流引线失超过程电磁特性研究  

ELECTROMAGNETIC CHARACTERISTICS OF MCP BSCCO-2212 CURRENT LEAD DURING QUENCHING PROCESS UNDER SELF FIELD

作　　者：李剑[1] 荣命哲[1] 

机构地区：[1]西安交通大学,西安710049

出　　处：《低温物理学报》2005年第A02期1149-1154,共6页Low Temperature Physical Letters

摘　　要：本文研究了大电流自场条件下,采用熔化铸造工艺(MCP)制备的BSCCO-2212高温超导电流引线失超过程电磁特性.在磁通粘滞流动模型的基础上,推导出二维磁通粘滞流动平衡方程式,得到了磁流阻状态下的电流密度、磁通密度和磁流阻率分布;应用二维场量分布进一步得到了平均磁流阻率随电流密度和温度的变化特性.计算结果对于电流引线安全保护设计、提高电流引线载流能力具有重要意义.This paper is mainly devoted to the calculation of the electromagnetic characteristics during losing superconductivity for Melt Cast Process BSCCO-2212 current lead under the self field generated by the high applied current. Based on the flux flow model, we develop the two dimensions flux viscous motion equilibrium equation. And then, by solving this equation with the nu- merical method, the distributions of current density, flux density and flux flow resistivity are obtained under flux-flow state. The average flux-flow resistivity depending on the average current density and temperature is also calculated with above distributions. The calculating results are significant for safety design and enhancing carry capacity of the current lead.

关 键 词：电流引线 磁通格子 磁流阻率 临界电流密度 

分 类 号：TM26[一般工业技术—材料科学与工程]