高温超导线圈制备的绝缘技术研究

建立了电热耦合模型,根据热力学原理,以最大温度梯度为目标,对双饼线圈进行了三维有限元分析,为超导磁体的制备选择了一种性能良好的绝缘材料。为了探究仿真选型的绝缘材料对高温超导储能磁体电磁性能的影响,绕制了A、B两个双饼线圈进行了浸渍工艺实验研究,对线圈A、B分别采用了直接浸泡式和真空压力式浸渍进行绝缘处理,与浸渍固化前相比,超导线圈临界电流衰减量分别为2.08%和3.16%,符合工程实践临界电流退化率小于5%的标准,验证了新型环氧树脂材料在实际应用中的可行性。

Study on the insulation technologies for the preparation of HTS coils

In this work, an electro-thermal coupling model was established. Based on the thermodynamic principle and the maximum temperature gradient as the target, a three-dimensional finite element analysis of the double pie coil was carried out. An insulating material with good performance was selected for the preparation of superconducting magnets. In order to explore the influence of the simulated selection of insulating materials on the electromagnetic properties of HTS energy storage magnets, two double-pie coils A and B were wound and the impregnation process was experimentally studied. The coils A and B were directly immersed and vacuum pressure impregnation was used for insulation treatment. Compared with before impregnation and curing, the critical current attenuation of superconducting coils is 2.08% and 3.16% respectively, which meets the standard of engineering practice where the critical current degradation rate is less than 5%. Feasibility of the new resin matrix composites in practical applications is verified.