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为了研究高温超导材料在储能装置中的应用,开展了高温超导D型磁铁的研究。针对高温超导一代Bi2223/Ag带材和二代YBCO带材的直角接头焊接问题,理论分析焊锡层厚度和带材焊接根数对直角接头电阻值的影响。当焊接参数保持稳定时,直角接头的电阻值和焊接根数大致成反比,对带材焊接根数对直角接头电阻的影响进行了实验验证。实验结果表明,可以通过增加带材的焊接根数来有效减小接头电阻,当焊接根数为5,且焊料厚度在微米量级时,两种带材各自之间的直角接头电阻值在液氮温度下均可控制在10-8Ω左右,能够满足装置稳定运行的要求。
In order to study the application of high-temperature superconducting materials in energy storage devices, the research on high-temperature superconducting D-type magnets was carried out. In order to solve the problem of right angle joint welding of high temperature superconducting Bi2223 / Ag tapes and second generation YBCO tapes, the influence of solder layer thickness and strip welding root number on the resistance of right angle connector was theoretically analyzed. When the welding parameters remain stable, the resistance of the right-angle connector and the number of welding is generally inversely proportional to the number of welded strip root right-angle connector resistance was experimentally verified. The experimental results show that the joint resistance can be effectively reduced by increasing the number of welded strips. When the welding number is 5 and the thickness of the solder is on the order of micrometers, the resistance of the right angle joint between the two strips Nitrogen temperature can be controlled at about 10-8Ω, to meet the requirements of stable operation of the device.