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首页> 外文期刊>Journal of magnetism and magnetic materials >Topology optimization of magnetic composite microstructures for electropermanent magnet
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Topology optimization of magnetic composite microstructures for electropermanent magnet

机译：永磁材料磁性复合材料微观结构的拓扑优化

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摘要

This paper presents topology optimization for the design of magnetic composite applicable to electropermanent magnet. Here, the magnetic composite is built from a periodic microstructure consisting of air, iron and permanent magnet (PM) materials. The combination of non-magnetic, soft and hard magnetic materials in a microscopic scale enables to produce its own persistent magnetic field like PM material, and also enables the control of the magnetic field by an external current like iron material. This work aims to find the optimal microstructure unit cell layout of the electropermanent magnet, and estimate its cross-property bounds. Here, the cross-property bounds connect the effective magnetic permeability and residual flux density, which are calculated using the asymptotic homogenization method. The design objectives (i.e. desired effective properties) are theoretically studied with consideration of application to electromechanical devices. Then, an multi-objective optimization problem to achieve desired effective properties is formulated and solved with a multi-material gradient-based topology optimization formulation. As a result, the optimal composite unit cell layouts that constitute the Pareto fronts are successfully obtained. From the Pareto fronts, cross-property bounds of the electropermanent magnet are numerically constructed and discussed.
机译：本文介绍了适用于永磁体的磁性复合材料设计的拓扑优化。在此，磁性复合材料是由包含空气，铁和永磁（PM）材料的周期性微观结构构成的。微观尺度上的非磁性，软磁性和硬磁性材料的组合能够产生像PM材料一样的自身持久磁场，并且还能够通过像铁材料这样的外部电流来控制磁场。这项工作旨在找到电永久磁铁的最佳微结构单元电池布局，并估计其交叉特性界。在这里，跨属性界线连接有效磁导率和剩余磁通密度，这是使用渐近均匀化方法计算得出的。理论上考虑了应用于机电设备的设计目标（即所需的有效特性）。然后，通过基于多材料梯度的拓扑优化公式，制定并解决了实现所需有效特性的多目标优化问题。结果，成功地获得了构成帕累托锋线的最佳复合晶胞布局。从帕累托（Pareto）前沿，数字地构造和讨论了电永久磁铁的跨属性界。

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