In this study, we estimate the locally defined permeability of the magnetizing particles in a soft magnetic composite (SMC) material whose effective permeability, observed by macroscopic measurements, is known. This procedure is repeated for a wide range of geometries whose electrical insulation layer thicknesses between the magnetizing particles are altered. It is shown that even if the effective permeability of the material is known by some measurement, the permeabilities of the individual particles cannot be immediately determined but remain heavily dependent on the thicknesses of the insulation films. This dependence is quantified. It is shown that when using periodic geometries to imitate SMC materials, one also has to use higher local permeabilities for the magnetizing particles or thinner insulations between the particles compared with the situation where randomized structures are used in order to obtain the effective permeability determined by measurements.

中文翻译：

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SMC 材料颗粒的渗透率估计

在这项研究中，我们估计了软磁复合 (SMC) 材料中磁化粒子的局部定义磁导率，其有效磁导率，通过宏观测量观察到，是已知的。对于磁化颗粒之间的电绝缘层厚度改变的各种几何形状重复该过程。结果表明，即使材料的有效渗透率通过某些测量已知，单个颗粒的渗透率也不能立即确定，而是仍然严重依赖于绝缘膜的厚度。这种依赖性是量化的。结果表明，当使用周期性几何形状来模仿 SMC 材料时，