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纳米晶合金高频饱和特性的微磁学模拟

发表时间:2018-01-31  浏览量:683  下载量:74
全部作者: 邹亮,伍珈乐,赵彤,张黎
作者单位: 山东大学电气工程学院;山东大学山东省特高压输变电技术与装备重点实验室
摘 要: 纳米晶合金凭借其优异的综合软磁性能受到越来越多的关注。本文在微磁学模拟的基础上,对该合金的高频饱和特性进行研究。在介观层面上,从铁磁材料特有的磁矩、磁畴概念出发,分析纳米晶合金的高频饱和机理。在宏观层面上,选取复数磁导率与磁化速率两个表征材料对外加磁场响应程度的物理量作为研究对象,分析频率改变对合金高频饱和特性的影响,并对结果进行数学拟合。结果表明,纳米晶合金的动态磁化进程主要以磁矩偏转和磁畴壁位移为主导机制。随着频率的升高,表征能量存储的磁导率实部呈缓慢递减趋势,而表征能量损耗的磁导率虚部呈快速递增趋势。合金磁化速率随着频率的增加而增大,整体而言,合金磁化进程中的平均磁化速率及最大磁化速率随频率的增大均呈线性增加趋势。研究结果为纳米晶合金在电磁装备中的应用提供了一定参考。
关 键 词: 电气工程;高频饱和特性;微磁学模拟;纳米晶合金
Title: Micromagnetic simulation of high-frequency saturation properties for nanocrystalline alloy
Author: ZOU Liang, WU Jiale, ZHAO Tong, ZHANG Li
Organization: School of Electrical Engineering, Shandong University; Shandong Provincial Key Lab of UHV Transmission Technology and Equipment, Shandong University
Abstract: Nanocrystalline alloys have been investigated intensively for their excellent soft magnetic properties. In this paper, the high-frequency saturation properties of the alloys were studied on the basis of micromagnetic simulation. On the mesoscopic level, the saturation mechanism for nanocrystalline alloy was analyzed from magnetic moment and domain wall perspective. On the macro level, two physical quantities including complex permeability and magnetization rate were employed for the research. The effects of frequency on the above two parameters were studied and the simulations were fitted. The results suggest that with the increasing of frequency, the real part of complex permeability which indicates energy storage decreases slowly, while the imaginary part of complex permeability which indicates energy consumption increases rapidly. In addition, the higher the frequency is, the larger is the magnetization rate. Overall, both average magnetization rate and maximal magnetization rate increase linearly with the increasing frequency. The simulation provides some references for future application of nanocrystalline alloy in electromagnetic equipment.
Key words: electrical engineering; high-frequency saturation property; micromagnetic simulation; nanocrystalline alloy
发表期数: 2018年1月第2期
引用格式: 邹亮,伍珈乐,赵彤,等. 纳米晶合金高频饱和特性的微磁学模拟[J]. 中国科技论文在线精品论文,2018,11(2):115-121.
 
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