方波脉冲下高低剩磁非晶和纳米晶磁芯磁化特性  

Magnetizion Characteristics of High and Low Remanence Amorphous and Nanocrystalline Magnetic Cores Under Square Wave Pulses

作　　者：魏艺卓 陈立[1] 孙凤举[2] 王志国 刘彦博[1] 张维森 张峰 师伟皓 WEI Yizhuo;CHEN Li;SUN Fengju;WANG Zhiguo;LIU Yanbo;ZHANG Weisen;ZHANG Feng;SHI Weihao(School of Electrical Engineering School,Xi’an Jiaotong University,Xi’an 710049,China;Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]西北核技术研究所,西安710024

出　　处：《现代应用物理》2023年第3期115-121,149,共8页Modern Applied Physics

基　　金：激光与物质相互作用全国重点实验基金资助项目(SKLLIM2011);国家自然科学基金资助项目(51790521)。

摘　　要：针对百纳秒量级方波直线型变压器驱动源(linear transformer driver,LTD)磁芯应用需求,建立了可调频方波脉冲产生电路,测量高、低剩磁非晶和纳米晶磁芯的磁化特性,获得不同等值频率下的磁滞回线,得到相对磁导率、磁感应强度增量及损耗等关键参数。研究结果表明,低剩磁非晶磁芯在高频下同样具有较高的矩形比,磁导率与同种材料的高剩磁磁芯相差较小,且相同频率条件下损耗更低;与非晶磁芯相比,相同频率条件下纳米晶磁芯最大相对磁导率大,磁芯损耗小。通过曲线拟合建立了损耗随频率的变化关系,可计算LTD在不同工作频率下的磁芯损耗。A frequency tunnable square wave pulse generation circuit is established for measuring the magnetization characteristics of high and low remanence amorphous and nanocrystalline magnetic cores in response to the application requirements of a 100 ns square wave linear transformer driver(LTD)magnetic core.The hysteresis loops at different equivalent frequencies are obtained,and key parameters such as relative permeability,magnetic induction increment and loss are obtained.The research results indicate that low remanent amorphous magnetic cores also have a high rectangular ratio at high frequencies,with smaller differences in permeability compared to high remanent magnetic cores of the same material and lower losses at the same equivalent frequency.Compared with amorphous magnetic cores,nanocrystalline magnetic cores have higher maximum permeability and lower losses,which is applicable to both high and low residual magnetic cores.The relationship between loss and frequency is established through curve fitting,and the core loss of LTD at different operating frequencies can be calculated.

关 键 词：直线型变压器驱动源 方波脉冲 非晶态磁芯 高低剩磁 磁化特性 

分 类 号：TM274[一般工业技术—材料科学与工程] TN784[电气工程—电工理论与新技术]