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<p> </p> <p style="text-align: center"><span style="font-size: 16px"><img width="168" height="168" alt="" src="/UploadFiles/FCK/123123(11).jpg" /></span></p> <p> </p> <p><span style="font-size: 16px">　　</span><strong><a href="http://www.linhang.com.cn/product/"><span style="font-size: 16px">電感</span></a></strong><span style="font-size: 16px">只能對非穩(wěn)恒電流起作用，它的特點兩端電壓正比于通過他的電流的瞬時變化率(導數(shù))，比例系數(shù)就是它??ldquo;自感” 電感起作用的原因是它在通過非穩(wěn)恒電流時產(chǎn)生變化的磁場，而這個磁場又會反過來影響電流，所以，這么說來，任何一個導體，只要它通過非穩(wěn)恒電流，就會產(chǎn)生變化的磁場，就會反過來影響電流，所以任何導體都會有自感現(xiàn)象產(chǎn)生??/span></p> <p> </p> <p><span style="font-size: 16px">　　在主板上能夠看到很多銅線纏繞的線圈，這個線圈就叫電感，電感主要分為磁心電感和空心電感兩種，磁心電感電感量大常用在濾波電路，空心電感電感量會比較小，常用于高頻電路。電感的特性與電容的特性正好相反，它具有阻止交流電通過而讓直流電順利通過的特性。電感的特性是通直流、阻交流，頻率越高，線圈阻抗越大。電感器在電路中經(jīng)常和電容一起工作，構成LC濾波器、LC振蕩器等??/span></p> </div> <div id="6aplaizydtj" class="apage" id="showfenye">  <script type="text/javascript"> var pagecont=1; if(pagecont > 2) { var ss = new Cls_jsPage(1, 1, 5, "ss"); 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