Multi-objective optimization of an actively shielded superconducting field winding
Multi-objective optimization of an actively shielded superconducting field winding
复制标题
主动屏蔽超导励磁绕组的多目标优化
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
K. Haran
中科院分区：
文献类型：
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作者：
David Loder;K. Haran
空心超导电机设计中的一个重要挑战是电机内磁场的包容性。目前的解决方案导致通过使用超导绕组可实现的高功率密度的大幅降低。为了解决这一挑战，主动屏蔽电磁体设计，MRI磁体设计中常用的方法，被认为是。这种拓扑结构利用一组主线圈来产生电枢磁动势，同时包括另一组相反激励的补偿线圈来减轻辐射到机器外部的场。这种方法消除或减少了被动磁屏蔽中钢的使用，从而允许非常高的功率密度机器。此外，一个多目标优化方案，以尽量减少两个竞争目标，超导线圈的使用和机器半径。结果显示，机器半径减少了32%，线圈尺寸增加了33%。
An important challenge in the design of air-core superconducting machines is the containment of the magnetic fields within the electric machine. Current solutions result in large reductions of the high power density achievable through the use of superconducting windings. To address this challenge, an actively shielded electromagnet design, an approach commonly used in MRI magnet designs, is considered. This topology utilizes a set of main coils to produce armature MMF, while including another set of oppositely excited compensating coils to mitigate the fields radiating outside the machine. This approach eliminates or reduces the use of steel in a passive magnetic shield, allowing for very high power density machines. Furthermore, a multi-objective optimization scheme is introduced to minimize two competing objectives, superconducting coil usage and machine radius. Results show a 32% decrease in machine radius with a 33% increase in coil size.