Development of the use exception and the systematic design technique of AC Superconductor

本会计年度制定了交流超导体的设计技术，收集了一个3年计划的最后一个会计年度迄今为止的研究成果，并回应了应用装置的分类，这是本研究的最终目的。从交流超导线路设计的角度出发，线路所暴露的外磁场的峰值磁场大于（高磁场应用、全超导发电机等），而不超过（低磁场应用：变压器、限流器等）的情况下，可以将应用设备进行划分。此外，它还可分为低交流损耗优先级和稳定优先级。根据这些仪器的分类，阐明了适合于每种仪器的线材设计方法。接下来，对内容进行总结。(1)稳定磁不稳定性首先，寻找不引起自磁场磁不稳定性的条件，并通过实验验证了其有效性。稳定条件由线段的丝畴厚度、临界电流密度和温度裕度决定，并根据目的进行线段的稳定设计。(2)明确了交流损耗的减小技术，在高磁场下，自磁场和外长度磁场伴随输运产生的损耗优于传统交流超导体中灯丝直径的细化和绕组间距的小型化。在低磁场下，自磁场和外长磁场伴随输运电流造成的损耗较好，细部化灯丝的直径并不一定重要。此外，尽管传统上很少有人知道，但它发现小化绕组螺距也能有效地降低损耗。通过给出外加磁场条件，明确了使低磁场损耗最小的线路设计条件。(3)稳定性对机械扰动的影响。明确了控制损耗和稳定性的稳铜段与占用面积的关系，使其定量把握了稳定性与损耗的权衡关系。将上述结果的详细内容总结为报告。少

This fiscal year formulated the design technique of AC Superconductor that collected the research result so far in the last fiscal year of a plan for 3 years, and it responded with the classification of the application apparatus which is the last purpose of this research.The cases (High magnetic-field application, Full superconducting generator, etc.) where the peak magnetic field of the external magnetic field to which a line is exposed is more than it, and in not more than (Low magnetic-field application : transformer, Current-limiter, etc.) it, application apparatus can be divided if it stands on the viewpoint of a design of an alternating-current super-conduction line.Moreover, it can divide by low alternating-current loss priority or stability priority.The design technique of the line material which was suitable for each according to the classified these apparatus was clarified.Hereafter, the contents are summarized.(1) Stabilization to magnetic instabilityFirst, the conditions wh … More ich do not cause the magnetic instability to a self-magnetic field were searched for, and the validity was verified by the experiment.Stable conditions were decided by the thickness of the filament domain of line section, critical current density, and the temperature margin, and the stabilization design of a line was attained according to the purpose.(2) Clarification of the reduction technique of AC lossIn the high magnetic field, the loss resulting from the self-magnetic field and the external length magnetic field accompanied by transport is superior, and detailed-izing of the diameter of the filament and little-izing of the winding pitch which have been conventionally pursued in an AC superconductor.In a low magnetic field the loss resulting from the self-magnetic field and the external length mangetic field accompanied by transport current is superior and detailed-izing of the diameter of a filament is not necessarily important.Moreover, although seldom known conventionally, it found out that little-izing of a winding pitch was also effective in loss reduction.By giving external magnetic-field conditions, the line design conditions which make loss by the low magnetic field the minimum were become clear.(3) Stabilization to mechanical disctrbanceThe relation with the occupancy area and the arrangement in the section of stabilization copper which governs loss and stability to mechanical discurbance is clarified, and it enabled it to have grasped trade-off of stability and loss quantitatively.The details of the above result were summarized as the report. Less