Finite-Element Analysis of Magnetically Shielded Wire Coils Using Homogenization Method
Finite-Element Analysis of Magnetically Shielded Wire Coils Using Homogenization Method
复制标题
采用均匀化方法对磁屏蔽线圈进行有限元分析
DOI：
10.1109/tmag.2017.2758445
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发表时间：
2018
影响因子：
2.1
通讯作者：
H. Igarashi
中科院分区：
文献类型：
--
作者：
Shogo Fujita;H. Igarashi
磁屏蔽线（MSW）是一种在导线导体表面具有导电薄层的材料，有望减少由于邻近效应而产生的涡流损耗。传统的有限元方法需要较长的计算时间来分析多圈固体固体垃圾的涡流。本文提出了一种均质化方法，将城市生活垃圾建模为具有复杂渗透率的均匀材料。结果表明，采用均匀化有限元法计算的线圈阻抗与传统有限元法计算的线圈阻抗具有较好的一致性。并利用该方法确定了最优屏蔽厚度。
A magnetically shielded wire (MSW), which has magnetic-conductive thin layers on the surface of a wire conductor, is expected to reduce the eddy current losses due to the proximity effect. The conventional finite-element method (FEM) needs unacceptably long computational time to analyze eddy currents in multi-turn MSWs. This paper proposes a homogenization method, which models MSW as a uniform material with complex permeability. The coil impedance evaluated by the homogenization-based FEM with coarse elements is shown to agree well with that obtained by the conventional FEM with much finer elements. Moreover, the optimal shield thickness is determined by the proposed method.