一种自适应寻找高温超导储能磁体最优结构的方法

A method for adaptively finding the optimal structure of high temperature superconducting energy storage magnets

高温超导线材的各向异性限制了磁体工作电流的提高,从而影响磁体的储能量。改变磁体形状是常用的提高储能量的方法之一,采用带凹槽的螺管线圈不仅能减小带材用量,并且能提高磁场的均匀度。提出一种新的寻找最优储能磁体结构的方法。与一般优化方法不同之处在于其可以根据设定自动寻找满足约束的最优几何结构。COMSOL有限元建模仿真分析结果表明:通过上述对磁体的优化,磁体在储能量提高38%的情况下,体积减小了59%,漏磁场亦满足要求,可以安全稳定运行。验证了所提优化方法的有效性。

The anisotropy of the high temperature superconducting wire limits the increase in the operating current of the magnet, which affects the energy storage of the magnet. Changing the shape of the magnet is one of the commonly used methods for increasing the energy storage. The use of a grooved coil not only reduces the amount of the strip but also improves the uniformity of the magnetic field. This paper proposed a new method for finding the optimal energy storage magnet structure. The difference from the general optimization method was that it could automatically find the optimal geometry that satisfied the constraints according to the settings. The simulation results of COMSOL finite element modeling show that through the above optimization of the magnet, the magnet has a volume reduction of 59% when the stored energy is increased by 38%, and the leakage magnetic field also meets the requirements, which can operate safely and stably, and the improve the effectiveness of the optimization method.