纳米晶铁芯的介观高频饱和机理与双尺度耦合建模方法

项目名称： 纳米晶铁芯的介观高频饱和机理与双尺度耦合建模方法

项目编号： No.51307102

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 电工技术

项目作者： 邹亮

作者单位： 山东大学

项目金额： 25万元

中文摘要： 随着现代电网的发展，纳米晶铁芯在高频饱和工况下的建模问题由于缺乏基础研究而变得越来越突出。本项目从纳米晶铁芯的介观高频饱和机理入手，探寻基于介观结构与宏观软磁性能关联特性的耦合建模方法。针对"动态饱和"和"静态饱和"两种高频磁场，分析纳米晶粒与残余非晶相的磁化磁矩进动规律，研究不同残余非晶相体积分数对非均匀磁化的影响机制，提出单磁畴介观结构的磁路拓扑和磁导计算方法，据此建立介观尺度等效磁路模型；研究两种高频饱和磁场激励下的纳米晶铁芯宏观工作点变化机理，建立宏观分布参数磁路模型；基于介观与宏观变量的耦合传递，研究双尺度间的协同工作界面连接方法，建立纳米晶铁芯双尺度耦合模型。本项目研究适应纳米磁材料在新型高频电磁装备发展的应用需求，其研究结果将丰富高频饱和工况下纳米晶铁芯等效建模的理论基础和分析方法，具有重要的理论意义和应用价值。

中文关键词： 纳米晶铁芯；介观；高频饱和机理；双尺度；耦合建模

英文摘要： With the development of modern power system, the mathematical modeling problems of nanocrystalline core under high frequency saturation condition is becoming more and more serious due to lacks of fundamental research. Therefore, the key scientific issues associated with high frequency saturation mechanism of nanocrystalline core in mesoscopic scale is focused, as to explore the coupled modeling method based on the correlation characteristics between mesostructure and macroscopic soft magnetic properties. In allusion to two kinds of high frequency magnetic field, "dynamic saturation field" and "static saturation field", the magnetic torque movement rule of nanocrystal and residual amorphous phase is revealed, followed by the influence mechanism of volume fractions of different residual amorphous phase on non-uniform magnetization. Both the topology of magnetic circuit and the calculation method of magnetic permeance within a single domain are proposed, as to establish the equivalent magnetic circuit model in mesoscopic scale. The macroscopic distributed parameter magnetic circuit model of anocrystalline core is established after the research of macro-working points changing mechanism for nanocrystalline core under high frequency saturation condition is proposed. According to the coupling transmission theory, the

英文关键词： Nanocrystalline core；Mesoscopic scale；High frequency saturation mechanism；Dual-scale；Coupled modeling