纳秒级脉冲电流下铁氧体磁环饱和特性  

Saturation Characteristics of Ferrite Beads Impacted by the Nanosecond's Current Pulse

作　　者：秦锋[1] 周辉[1] 毛从光[1] 吴刚[1] 崔志同[1] 

机构地区：[1]强电磁脉冲辐射环境模拟与效应国家重点实验室(西北核技术研究所),西安710024

出　　处：《高电压技术》2017年第10期3381-3386,共6页High Voltage Engineering

基　　金：国家自然科学基金(51107102)~~

摘　　要：针对铁氧体环应用于复杂电磁环境防护设计问题,研究了脉冲传导电流作用下铁氧体磁环的饱和特性。在伏安法测得磁环的磁化曲线的基础上,采用磁性朗之万函数拟合磁化曲线,分别获得不同脉冲电流脉宽、磁环厚度、截面积、内外径之比以及材料种类等参数下,磁环的饱和电流特性。结果表明:纳秒级脉冲电流的脉宽对磁环的饱和特性几乎没有影响;磁环的截面积与磁环的饱和电流成线性正比关系,而磁环的厚度以及磁环的内外径之比对磁环的饱和特性几乎没有影响;初始磁导率越大的磁环其饱和电流越小,且饱和电流随截面积的增速也越小。For ferrite beads used in the design of complex electromagnetic environment protection problems,we researched the saturation characteristics of ferrite beads under the conducted current of electromagnetic pulse.On the basis of the measurement of magnetization curves in voltammetry and fitted the magnetization curve by using magnetic Langevin function,we obtained the magnetic saturation current under different pulse widths of electromagnetic pulse conduction current,the thicknesses,the cross-sectional areas,the ratios of the diameter and the material types of the ferrite.The experimental results show that the pulse width of the nanosecond pulse current through the ferrite bead has hardly influence on the saturation characteristics.The saturation current is proportional to the cross-sectional area of the ferrite bead,while the thickness and the ratio of the diameter of the ferrite beads have hardly relationship with the saturation characteristics.The bigger the initial magnetic permeability of the ferrite bead is,the smaller the saturation current and its growth along with the cross-section area are.

关 键 词：电磁脉冲 电磁防护 磁环 铁氧体 饱和特性 

分 类 号：TM277[一般工业技术—材料科学与工程]