Magnetic Multi-Scale Model for Local Eddy Current Flow in Complex Materials with Insulated Conductive Particles
Magnetic Multi-Scale Model for Local Eddy Current Flow in Complex Materials with Insulated Conductive Particles
复制标题
具有绝缘导电颗粒的复杂材料中局部涡流的磁多尺度模型
DOI：
10.1109/tmag.2017.2659763
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发表时间：
2017
影响因子：
2.1
通讯作者：
Keisuke Fujisaki and Atsushi Yao
中科院分区：
文献类型：
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作者：
Atsushi Yao;Kouhei Tsukada;Shunya Odawara;Keisuke Fujisaki;Yuji Shindo;Naoki Yoshikawa;and Tetsuma Yoshitake;Keisuke Fujisaki and Atsushi Yao
本文提出了一种适用于由绝缘材料隔开的导电体组成的复杂材料的磁多尺度问题的等效磁滞曲线。传统的方法是对每种材料赋予等效的材料常数，不能正确地表达局部涡流损耗和由局部涡流产生的额外磁场。为了解决这个问题，我们推导出磁滞曲线的体积平均磁通密度和表面磁场的微观模型，并将此曲线应用到宏观模型。新的宏观模型的网格数减少到约十分之一的微观模型。磁滞采用自由能磁滞模型处理，宏观模型忽略电导率。磁滞曲线和数值计算的损失是一致的微观和宏观模型。所提出的方法很好地表达了局部涡流现象。
This paper proposes an equivalent magnetic hysteresis (B-H) curve for magnetic multiscale problems of complex materials composed of electrical conductors separated by insulating material. The conventional method, which assigns equivalent material constants to each material, cannot properly express the local eddy current loss and the extra magnetic field derived from the local eddy current. To solve this problem, we derive the magnetic hysteresis curve from the volume-averaged magnetic flux density and the surface magnetic field in the micro-model, and apply this curve to the macro-model. The mesh number of the novel macro-model is reduced to around one-tenth that of the micro-model. Magnetic hysteresis is treated by a free energy magnetic hysteresis model, and the macro-model ignores electrical conductivity. The magnetic hysteresis curve and the numerically calculated losses are consistent in the micro- and macro-models. The proposed method well expresses the local eddy current phenomena.