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晨飞资讯</a> » <a href="/Article/diangandezuoyong_1.html">电感的作?/a></div>
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电感的作?/h3>
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<span>文章出处?a href=""><a href="http://cfdz.nsw888.com">深圳市晨飞电子有限公?/a></a></span><span>网责任编辑：<a href="http://cfdz.nsw888.com">NSW</a></span><span>作者：<a href="http://cfdz.nsw888.com">NSW</a></span><span>人气?span
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<p> <span style="font-size: 16px">在电路中，当电流流过导体的时候，会产生电磁场，电磁场的大小除以电流的大小就是电感?电感的定义是L=phi/i, 单位是韦?电感是衡量线圈产生电磁感应能力的物理量。给一个线圈通入电流，线圈周围就会产生磁场，线圈就有磁通量通过。通入线圈的电源越大，磁场就越强，通过线圈的磁通量就越大?/span></p>
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<p><span style="font-size: 16px"> 实验证明，通过线圈的磁通量和通入的电流是成正比的，它们的比值叫做自感系数，也叫做电感。如果通过线圈的磁通量?phi;表示，电流用I表示，电感用L表示，那?L= φ/I 电感的单位是?H)，也常用毫亨(mH)或微?uH)做单位?H=1000mH?H=1000000uH?/span></p>
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<p><span style="font-size: 16px"> </span><strong><a href="http://www.chenfeipower.com/product/"><span style="font-size: 16px">电感</span></a></strong><span style="font-size: 16px">只能对非稳恒电流起作用，它的特点两端电压正比于通过他的电流的瞬时变化率(导数)，比例系数就是它?ldquo;自感” 电感起作用的原因是它在通过非稳恒电流时产生变化的磁场，而这个磁场又会反过来影响电流，所以，这么说来，任何一个导体，只要它通过非稳恒电流，就会产生变化的磁场，就会反过来影响电流，所以任何导体都会有自感现象产生?/span></p>
<p> </p>
<p><span style="font-size: 16px"> 在主板上能够看到很多铜线缠绕的线圈，这个线圈就叫电感，电感主要分为磁心电感和空心电感两种，磁心电感电感量大常用在滤波电路，空心电感电感量会比较小，常用于高频电路。电感的特性与电容的特性正好相反，它具有阻止交流电通过而让直流电顺利通过的特性。电感的特性是通直流、阻交流，频率越高，线圈阻抗越大。电感器在电路中经常和电容一起工作，构成LC滤波器、LC振荡器等?/span></p>
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