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0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);">一、用途：</p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 本變阻器在實(shí)驗(yàn)室中作研究試驗(yàn)用，在校準(zhǔn)電氣儀表作變更電壓電流或作為代替未定阻值的可變電阻器用，在教學(xué)中供中學(xué)物理教師演示或?qū)W生分組實(shí)驗(yàn)使用。</p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 二、結(jié)構(gòu)及工作原理：</p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 滑動(dòng)變阻器由合金絲瓷管、滑動(dòng)頭、滑桿、支架、接線柱等主要部件組成。它用有氧化膜絕緣層的銅鎳合金電阻絲密繞在瓷管上。在電阻絲的表面上，有可以在線面滑動(dòng)的導(dǎo)電刷，它是一種變更導(dǎo)線的長(zhǎng)短來(lái)改變電阻大小的裝置，用改變電阻的方法來(lái)變更電壓電流的儀器。</p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 三、用法：</p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 滑動(dòng)變阻器在電路中可以作限流器用，也可以作分壓器用。在確保安全的條件下，如何選用這兩種不同的形式，是由電路中的需要來(lái)決定的。<i class="br" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; display: block;"></i></p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 1、不超過(guò)規(guī)定的電流<i class="br" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; display: block;"></i></p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 2、接線一上一下（都上相當(dāng)于導(dǎo)線，起不到保護(hù)作用，都下阻值大，起不到變阻作用）</p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 四、維護(hù)及保養(yǎng)：<i class="br" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; display: block;"></i></p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 1、變阻器使用時(shí)不宜過(guò)分靠近熱源。<i class="br" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; display: block;"></i></p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 2、變阻器經(jīng)長(zhǎng)期使用，可能在電刷與電阻絲的接點(diǎn)產(chǎn)生氧化絕緣膜造成接觸不良，這時(shí)須擦去氧化層方可使用。長(zhǎng)時(shí)間受振及其他原因，可能出現(xiàn)螺絲松脫、滑動(dòng)觸頭松動(dòng)等毛病，要注意檢查消除。<i class="br" style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; display: block;"></i></p><p style="-webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "\\5FAE軟雅黑", Arial, sans-serif; font-size: 16px; white-space: normal; background-color: rgb(255, 255, 255);"> 3、變阻器不宜超過(guò)額定最高負(fù)載使用。</p><p><br/></p> <div id="yq00aqiue" class="clear"></div> </div> <div id="yq00aqiue" class="article"> <p>上一篇：<a href="/Article-2868139.html">看完本篇你就知道什么是無(wú)線核相儀了</a></p> <p>下一篇：<a href="/Article-2859521.html">水內(nèi)冷發(fā)電機(jī)絕緣特性測(cè)試儀性能特點(diǎn)</a></p> </div> <div id="yq00aqiue" class="clear"></div> </div> </div> <div id="yq00aqiue" class="n-9"> <div id="yq00aqiue" class="c-right"> <div id="yq00aqiue" class="c-1 r-pro"> <div id="yq00aqiue" class="c-left"> <div id="yq00aqiue" class="h-2"><a href="/products.html">產(chǎn)品分類</a></div> <ul> <li><a href="/ParentList-1388067.html" onmouseover="showsubmenu('大電流發(fā)生器')" 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