不同剩磁铁基纳米晶磁芯脉冲磁化特性  

Pulse Magnetization Characteristics of Fe-based Nanocrystalline Cores With Different Remanences

作　　者：刘毅[1] 韩毅博 刘思维[1] 林福昌[1] 

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市430074

出　　处：《中国电机工程学报》2016年第2期577-584,共8页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51507070)~~

摘　　要：铁基纳米晶材料因其优异的软磁性能被广泛应用于脉冲磁元件中。为更好指导脉冲磁元件的设计与性能分析,需要根据应用环境测试铁基纳米晶磁芯的脉冲磁化特性。该文建立了基于LC铁磁谐振放电型测试平台,选择合适的测量电路,获得高、低剩磁铁基纳米晶材料在不同磁化速率、磁感应增量下的初始磁化曲线和磁滞回线,并获得脉冲磁导率、损耗等关键磁参数的变化趋势。通过曲线拟合的方法建立了脉冲磁导率、损耗与磁化速率、磁感应增量之间的数学关系,全面反映了铁基纳米晶磁芯的脉冲磁化特性。基于铁基纳米晶磁芯的脉冲磁化特性基础数据,能够有效、准确分析典型脉冲磁元件的工作特性并优化其设计。Fe-based nanocrystalline core is widely used in pulse magnetic components because of its excellent soft magnetic performance. In order to design, or verify the performance of pulse magnetic components, it is necessary to test the pulse magnetization characteristics of magnetic cores according to the applications. A test stand based on LC ferromagnetic resonance and suitable circuit was built to determine the initial magnetization curves and hysteresis loops of Fe-based nanocrystalline cores with different remanences. For the comprehensive reflection of the pulse magnetization characteristics of Fe-based nanocrystalline cores, the trends of pulse permeability and loss density changing with magnetization rate were obtained. Besides, the mathematical relationship between pulse permeability, loss density and magnetization rate, magnetic induction increment was established by curve fitting. The pulse magnetization characteristics in this paper can provide the reference for designing and analyzing the working characteristic of pulse magnetic components under similar conditions.

关 键 词：铁基纳米晶 磁化曲线 损耗 脉冲磁特性 磁滞回线 

分 类 号：TM85[电气工程—高电压与绝缘技术]