铁氧体磁心单只与配对电磁性能关系的研究.PDF

铁氧体磁心单只与配对电磁性能关系的研究 南京精研磁性技术有限公司 石 炎 南京 210033 重庆普天通信设备有限公司 刘九皋 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切合整机使用实际。 关键词： 单只磁心 配对磁心 稳定性参数 Study on the propertiesof single ferrite cores and paired ferrite cores Nanjing Finemag Technology Co., Ltd., Y. Shi, 210033 ChongQing PuTian Communication Equipment Co., Ltd., J. G. Liu, 400042 Abstract: The intrinsic properties of the soft ferrite materials are usually identified by measurement on standard rings which have 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 the article, we calculated the quantitative relationship of the stability parameter between separate cores and paired cores, according to the fundamental magnetic circuit law. The reasonability and reliability of the method that separate cores are randomly checked have been confirmed by the experiments on the drilled cores, and this should ensure the experiment data complying w