A 3-D Numerical Model to Estimate the Critical Current in MgB2 Wire and Cable with Twisted Structure

作者：Liu, Donghui; Yong, Huadong^*; Zhou, Youhe

来源：Journal of Superconductivity and Novel Magnetism, 2017, 30(7): 1757-1765.

DOI：10.1007/s10948-017-4017-5

• MgB2
• Wire
• Cable
• Critical current

Due to the low material cost, high critical transition temperature and high-current-carrying capacity, MgB2 round wire with twisted filaments has great potential for applications in engineering. Therefore, it is important to estimate their critical current for optimizing and realizing high-powered wire and cable. A 3-D model is presented to calculate the critical current of wire and cable with twisted filaments. The critical current is estimated based on the Biot-Savart law and self-consistent model. A comparison between 2-D and 3-D models is performed for the wire. We consider the effect of twist pitch on the critical current. Moreover, the critical current of 6-around-1 cable with different twist pitches is analyzed and discussed using the 3-D model. It can be found that twist pitch of filaments plays an important role on the critical current. The model and method may also be useful for other superconducting wires and cables.

• 出版日期2017-7
• 单位兰州大学