单螺线管型高温超导磁体的设计与优化

Design and optimization of single-solenoid HTS magnets

高温超导带材的各向异性严重制约着超导磁体可运行临界电流的提高,从而影响着磁体的性能。因此,电磁优化设计在高温超导磁体设计中占据着至关重要的位置。主要采用有限元软件对磁体建模仿真,根据磁体磁场的分布,采用多种带材绕制磁体,进行设计优化。结果表明,在相同体积的有效带材基础上,优化之后的临界电流明显提高,储能量提升了约22%;同时,在计算磁体的可运行临界电流时,采用了多次仿真、迭代计算的方式求解磁体的可运行临界电流。这种方法在仿真阶段可直接求解出磁体的临界电流,计算较为方便,而且获取的是实时运行的临界电流,更符合实际情况。

The anisotropy of HTS tapes seriously restricts the increase of superconducting magnetg critical current, affecting the performance of the magnet. Therefore, the electromagnetic optimization occupies a crucial position in the design of high tem- perature superconducting magnet. In this paper, we used the simulation software of finite element to model for magnetic, and then optimized magnet by adopting a variety of strip to wind the magnets according to the distribution of magnetic field. The result shows that the critical current of magnets is improved significantly and the stored energy is increased by 22% on the basis of same effective volume. Meanwhile,when calculating the magnetg critical current, we simulate for some times to solve directly the criti- cal current. This method is more convenient, the critical current is real -time and satisfies the reality.