共模电感的滤波电路

时间： 2024-03-14 来源：索瑞达电子官网

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今天给大家介绍共模电感，以下内容由索瑞达电子整理，相关内容供以参考。

共模电感（Common mode Choke），也叫共模扼流圈，常用于电脑的开关电源中过滤共模的电磁干扰信号。在板卡设计中，共模电感也是起EMI滤波的作用，用于抑制高速信号线产生的电磁波向外辐射发射。

共模电感实质上是一个双向滤波器：一方面要滤除信号线上共模电磁干扰，另一方面又要抑制本身不向外发出电磁干扰，避免影响同一电磁环境下其他电子设备的正常工作。

共模电感的滤波电路，La和Lb就是共模电感线圈。这两个线圈绕在同一铁芯上，匝数和相位都相同（绕制反向）。这样，当电路中的正常电流流经共模电感时，电流在同相位绕制的电感线圈中产生反向的磁场而相互抵消，此时正常信号电流主要受线圈电阻的影响（和少量因漏感造成的阻尼）；当有共模电流流经线圈时，由于共模电流的同向性，会在线圈内产生同向的磁场而增大线圈的感抗，使线圈表现为高阻抗，产生较强的阻尼效果，以此衰减共模电流，达到滤波的目的。

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本文由玉鹤甘茗转载自索瑞达电子官网，原文标题为:共模电感的滤波电路，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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共模电感原理与应用：高效抑制EMI干扰的滤波解决方案

共模电感是一种利用铁氧体磁芯绕制的双向对称电感，能有效抑制共模噪声，而对差模信号影响甚微。其工作原理基于共模电流在磁环中产生的磁通相互叠加，形成高电感量，从而抑制共模电流；而差模电流由于磁通相互抵消，电感量小，可无衰减通过。共模电感在电子线路中广泛应用于EMI滤波，减少电磁干扰，提高系统性能。

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2019年Q2 - AIT - 选型指南代理服务技术支持批量订货

深圳市索瑞达电子（SOREDE）有限公司创建于2007年，是一家致力于贴片功率电感、插件工字电感、共模电感、磁环电感系列被动元件的研发、生产与销售为一体的创新型企业。公司逐步发展成立香港索瑞德电子有限公司、扬州索瑞德电子有限公司，现厂房总面积10000平方米，员工300多人。

贴片电感屏蔽电感一体成型电感插件工字电感色环电感磁环电感共模电感片式铁氧体磁珠片式香层电感片式绕线电感片式共模电感

代理服务线上商城技术资料

贴片功率电感电感线圈基本知识你了解多少？

文章介绍了七种常用线圈，包括单层、蜂房式、铁氧体磁芯、铜芯、色码、阻流圈和偏转线圈，每种线圈都有其独特的结构和应用。此外，文章还介绍了电感线圈的三个关键参数：电感量L、感抗XL和品质因素Q，以及散布电容对线圈性能的影响。

2024-05-26 - 设计经验代理服务技术支持批量订货

共模电感的使用注意事项

通常情况下，同时注意选择所需滤波的频段，共模阻抗越大越好，因此在选择共模电感时需要看器件资料，主要根据阻抗频率曲线选择。另外选择时注意考虑差模阻抗对信号的影响，主要关注差模阻抗，特别注意高速端口。

2024-05-17 - 设计经验代理服务技术支持批量订货

索瑞达电子授权世强硬创代理，电感抗干扰性强满足各类高负载应用需求

电感产品采用先进的低损耗合金粉末压铸技术，实现了低阻抗和极小的寄生电容，进一步优化了电路性能。

2024-05-24 - 签约新闻代理服务技术支持批量订货

索瑞达电子（SOREDE）SRCM系列片式共模电感选型表

描述- Shenzhen sorede Electronic Co., Ltd., founded in 2007, is an innovative enterprise dedicated to the R & D, production and sales of passive components of SMD power inductors, plug-in I-shaped inductors and magnetic ring inductors.

型号- SRCM.2012.371TT00,SRCM2012-900T,SRCM.2012.400TT00,SRCM.2012.670TT00,SRCM.2012.201TT00,SRCM.2012.261TT00,SRCM.2012.900TT00,SRCM.2012.181TT00,SRCM2012-670T,SRCM.2012.300TT00,SRCM.2012.121TT00,SRCM.2012,SRCM2012-371T,SRCM.2012 SERIES,SRCM2012-121T

2020/11/19 - 索瑞达电子 - 选型指南代理服务技术支持批量订货