铁氧体磁心单只与配对电磁性能关系研究 relationship of electromagnetic properties between single and paired ferrite cores.pdfVIP

研究·分析·实验 铁氧体磁心单只与配对电磁性能关系研究 1 2 石 炎 ，刘九皋 （1. 南京精研磁性技术有限公司，江苏南京 210033 ； 2. 重庆普天通信设备有限公司，重庆 400042 ） 摘 要：软磁铁氧体材料的本征特性，通常用闭合磁路的标准样环测量确定。而实际应用的磁心形状各异， 尺寸大小不同，与此密切相关的涡流损耗、谐波失真（THD ）、频率特性等数据往往同标环大相径庭。国际电工 委员会新公布的测量标准 IEC62044-2 （2005 年 3 月）指出，不可以环形结果代表磁心，但可以在这种磁心中心 打孔作为环形来测试。本文依据基本磁路定律，导出了单只与配对磁心稳定性参数间的定量关系，并立足于穿 心绕线测量的试验事实，确定了单只抽测方法的合理性与可靠性，从而保证了测量数据更符合整机使用实际。 关键词：软磁铁氧体；单只磁心；配对磁心；稳定性参数 中图分类号：TM277 文献标识码：B 文章编号：1001-3830(2006)06-0024-06 Relationship of Electromagnetic Properties Between Single and Paired Ferrite Cores 1 2 SHI Yan , LIU Jiu-gao 1. Nanjing Finemag Technology Co, Ltd, Naijing 210033, China; 2. Chongqing PuTian Communication Equipment Co, Ltd, Chongqing 400042, China Abstract: The intrinsic properties of soft ferrite materials are usually identified by measurement on standard rings with closed magnetic circuit. However, the data such as eddy current loss, total harmonic distortion (THD) and frequency properties of the practical magnetic cores are quite different from the standard rings due to the difference of the shapes and sizes. According to the latest standard of the IEC (IEC62044-2, March, 2005), the results of the rings can’t represent that of cores, unless the cores are drilled in the center. In this article, we derived the quantitative relationship of the stability parameter between separate cores and paired cores, according to the fundamental magnetic circuit law. The reasonability