分磁环对高温SMES磁体交流损耗的影响研究

摘要

高温SMES磁体的交流损耗是制约其投入实际应用的因素之一,交流损耗的大小与超导导线所承受的磁场位型关系紧密,加装分磁环是改变超导磁体磁场位型的手段之一,因此对交流损耗的抑制也有实际意义.文中对高温SMES螺线管磁体进行了有限元建模,阐述了分磁环对减小超导磁体交流损耗的原理,分别计算了超导磁体在加装分磁环与未装分磁环下交流损耗的大小、分布,分析了分磁环的降损率参数r随磁体电流的变化规律,并对提高分磁环降损率的关键问题进行了探讨.%The AC loss of HTS solenoid magnet is one of the factors that limits its practical application.The value of AC loss is closely associated with the magnet field type of superconducting wires bear,so as a means of changing the magnet field type,flux diverter would also share a practical significance in reducing AC loss.This article conducted the finite element modeling of HTS solenoid magnet,elaborated the principles in reducing the AC loss of superconducting magnet by flux diverters,calculated the magnitude and distribution of AC loss separately with flux diverters and without flux diverters,and the loss reduction rate r of flux diverters was analyzed.Along with the change of magnet current,the key problems to improve the loss reduction rate of flux diverters were discussed.