应用阻抗分析仪测量磁芯复数磁导率的不确定度分析  

Uncertainty Analysis of Complex Permeability Measurement Using Impedance Analyzer

作　　者：吴琼[1] 王宝燕[1] 胡秀坤[1] 肖小飞[1] 

机构地区：[1]中国计量学院国家磁性材料及其制品质量监督检验中心(浙江),浙江杭州310018

出　　处：《磁性材料及器件》2009年第4期43-46,共4页Journal of Magnetic Materials and Devices

基　　金：国家质检总局科技计划资助项目(2007QK60);浙江省科技厅分析测试科技计划项目(2007F0043)

摘　　要：应用阻抗分析仪及短路同轴腔测量了镍锌铁氧体材料高频下的复数磁导率，具体介绍了该测试系统测量重复性及仪器精度导致的标准不确定度以及合成不确定度、扩展不确定度等评定过程。结果表明，在6MHz～60MHz频率范围内，复数磁导率实部μ′和虚μ″的扩展不确定度为5％-6％左右，证实了用这种方法测量高频复数磁导率是可行的。通过比较发现，随着频率的增高，μ′的不确定度增高，而μ″的不确定度却呈现减小的趋势。The complex permeability of NiZn ferrite magnetic core at high frequency was measured by shorting coaxial cavity of the impedance analyzer, and the standard uncertainty components resulting from measuring repeability and equipment precision, the combined standard uncertainty and the expanded uncertainty are analyzed. It is turned out that the expanded uncertainty of μ′ and μ″ is in the range of 5% -6%, which proves the pracitability of high frequency permeability measurement by shorting coaxial cavity. It was also found that the expanded uncertainty of μ′ increases, while the expanded uncertainty of μ″ decreases with increasing frequency.

关 键 词：阻抗分析仪 复数磁导率 测量 不确定度 

分 类 号：TM936.4[电气工程—电力电子与电力传动]