TDK铁氧体磁环B64290A0040X830

TDK铁氧体磁环B64290A0040X830

铁氧体磁芯与配件 58.3X40.8X17.6 N30 TOROID

制造商: TDK

产品种类: 铁氧体磁芯 高频磁环 高频导磁环 锰锌铁氧体磁芯 纳米晶软磁芯 非晶合金磁芯  镍锌铁氧体 铁镍钼磁粉芯 铁硅铝磁粉芯

系列: T58/41/18

产品: Toroids

类型: Ungapped

芯体材料: N30

封装: Bulk

商标: EPCOS / TDK

内径: 40.8 mm

外径: 58.3 mm

外部高度: 17.6 mm

产品类型: Ferrite Cores & Accessories

工厂包装数量：50

子类别: Ferrites

零件号别名: B64290A40X830

单位重量: 150.005 g

电磁兼容测试中磁环的整改技巧有哪些

磁环:顾名思义就是一块环状的导磁体。磁环是电子电路中常用的抗干扰元件，对于高频噪声有很好的抑制作用。

磁环对电磁波有条件反射的作用，从而减少了信号传送的失真，更不会影响你的音频视频音质和画面。用于安置各种线材如：电源线、音响线、AV线、数据线，它能改善电磁周围的电磁场，从而避免外界干扰。

磁环是电子产品中常用的抗干扰元件，对于高频噪声有很好的抑制作用。一般使用铁氧体材料（Mn-Zn）制成。

磁环在不同的频率下有不同的阻抗特性，一般在低频时阻抗很小，当信号频率升高时，磁环表现的阻抗急剧升高，在EMC工程设计中，磁环作用显著而被广泛使用。

线束可以缠绕2圈效果更好，套在USB线、数据线、AV线、视频线、音频线上, 提高信号质量和屏蔽辐射。特别是套在鼠标、键盘，靠近计算机一端，有效地抑制电磁辐射。

磁环的种类：

铁氧体磁环、铁粉芯磁环、铁硅铝磁环、非晶磁环、

扣式磁环与铁氧体的大区别在于它具有很大的损耗，用这种扣式磁环制作的电感，其特性更接近电阻。它是一个电阻值随着频率增加而增加的电阻，当高频信号通过铁氧体磁环时，电磁能量以热的形式耗散掉。

需要确认咱们电子产品是什么频段的电磁干扰。需要去除高频电磁干扰，需要选择镍锌抗干扰磁环，去除低频段电磁干扰，请选择锰锌抗干扰磁环，这是基于不同材质的磁环达到的滤波效果不一样来进行选择的。

电磁兼容EMC测试中加磁环的整改技巧如下：

1、把磁环穿到连接线上在外面注塑下。

2、将连接线在抗干扰磁环中绕上几圈，这样一是起固定作用，二是又能增加对线的抗干扰作用。

3、扣式磁环方便地夹在电源线、信号线上。灵活，可重复使用安装。自带卡式固定，不影响设备的整体形象。

4、外观选择“尽量长、尽量厚、内径尽量小”的磁环。即磁环越长越好,孔径和所穿过的电缆结合越紧密越好。但在有直流或交流偏置的情况下，还存在铁氧体饱和的问题，抑制元件的横截面积越大，越不易饱和。

5、磁环对电磁波有条件反射的作用，从而减少了信号传送的失真。磁环套用的位置尽量靠近源头的一端（电缆线的进出口），会更加有效地抑制电磁辐射。

6、在抑制高频干扰时,宜选用镍锌铁氧体,抑制低频干扰时用锰锌铁氧体。因为锰锌铁氧体的磁导率在几千至上万,而镍锌铁氧体为几百至上千,磁环铁氧体的磁导率越高,其低频时的阻抗越大,高频时的阻抗越小。

7、磁环易碎，因此在安装的过程中需要进行良好的固定，避免运输过程中的碰撞而导致磁环破裂，我们一般用扎带固定。

北京友盛兴业科技有限公司代理供应TDK铁氧体磁芯,欢迎来电咨询

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