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产品简介： 共模线圈
共模线圈也叫共模扼流圈，是在一个闭合磁环上对称绕制方向相反、匝数相同的两组线圈?
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<div class="nr_list"><ul></ul><div class="clear"></div></div> <div id='contentvalue100' class="shouzi2" style='display:;'><p> <br />
<strong>共模线圈<br />
<br />
</strong> 共模线圈也叫共模扼流圈，是在一个闭合磁环上对称绕制方向相反、匝数相同的两组线圈?br />
<br />
<strong>工作原理?br />
</strong><br />
理想的共模线圈对两个绕组之间的共模干扰具有抑制作用，而对两个绕组之间存在的差模干扰无电感抑制作用。信号电流或电源电流在两个绕组中流过时方向相反，产生的磁通量相互抵消，共模线圈呈现低阻抗。共模噪声电流（包括地环路引起的骚扰电流，也称作纵向电流）流经两个绕组时方向相同，产生的磁通量同向相加，共模线圈呈现高阻抗，从而起到抑制共模噪声的作用?br />
<br />
<strong>共模线圈的作用：<br />
</strong><br />
共模线圈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。 共模线圈可以传输差模信号，直流和频率很低的共模信号都可以通过，而对于高频共模噪声则呈现很大的阻抗，所以它可以用来抑制共模电流骚扰<br />
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