航空插頭參數(shù)選型方法-上?？朴姎庥邢薰?/title> <meta name="keywords" content="航空插頭參數(shù),航空插頭" /> <meta name="description" content="?選擇航空插頭要注意很多地方，要看它的電壓、電流、電阻、屏蔽性是否適合自己使用，今天就來告訴航空插頭是連接電氣線路的機電元件。因此電連接器自身的電氣參數(shù)是選擇電連" /> <link rel="stylesheet" type="text/css" href="/templets/hl/index.css"> <link rel="stylesheet" type="text/css" href="/templets/hl/style.css"> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <body> <h1><a href="http:///">天堂最新,国产一区二区三区久久99,思思久久破,老湿机午夜福利免费在线</a></h1><div id="cecwk" class="pl_css_ganrao" style="display: none;"><listing id="cecwk"><var id="cecwk"></var></listing><xmp id="cecwk"></xmp><fieldset id="cecwk"><listing id="cecwk"><address id="cecwk"></address></listing></fieldset><strong id="cecwk"></strong><strong id="cecwk"><pre id="cecwk"><tt id="cecwk"><mark id="cecwk"></mark></tt></pre></strong><ruby 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<div>網(wǎng)站：<br>?????????www.best5858.com</div> <div><br></div> </ul> </div> </div> <div id="dztbprhhvx93" class="contRight"> <div id="dztbprhhvx93" class="conNeiRong"> <div id="dztbprhhvx93" class="conNeiTitle" style="text-indent:10px;"> <span id="dztbprhhvx93" class="conNeiTitle-span1"><span></span>行業(yè)新聞</span> <span id="dztbprhhvx93" class="conNeiTitle-span2">當前位置:<a href='http:///'>主頁</a> > <a href='http:///news/'>新聞中心</a> > <a href='http:///news2/'>行業(yè)新聞</a> > </span> </div> <div id="dztbprhhvx93" class="conNeiText"> <div style=" text-align:left; float:left; margin:0px; padding:0px auto; width:98%;min-height:565px; margin-left:8px;"> <h1 class="title" style="margin-top:10px; margin-left:10px; text-align:center; line-height:35px;">航空插頭參數(shù)選型方法</h1> <div id="dztbprhhvx93" class='search2' style='text-align:center; border-top:dotted 1px #999; margin-top:10px; padding-top:10px;'><strong>發(fā)布時間: </strong>2018-10-29　瀏覽次數(shù): ?<script src="http:///plus/count.php?view=yes&aid=576&mid=1"type='text/javascript' language="javascript"></script></div> <div id="dztbprhhvx93" class="newp" style=" width:98%; padding:8px;"> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <span style="text-indent: 2em; font-size: 14px;">?選擇航空插頭要注意很多地方，要看它的電壓、電流、電阻、屏蔽性是否適合自己使用，今天就來告訴</span><span style="font-size: 14px; text-indent: 2em;"><strong><a href="http:///"><span style="color:#ff0000;">航空插頭</span></a></strong>是連接電氣線路的機電元件。因此電連接器自身的電氣參數(shù)是選擇電連接器首先要考慮的問題。</span></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <strong><span style="font-size: 14px;">①<span style="text-indent: 28px;">航空插頭</span>額定電壓</span></strong></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <span style="font-size: 14px;">額定電壓又稱工作電壓，它主要取決于電連機器所使用的絕緣材料，接觸對之間的間距大小。某些元件或裝置在低于其額定電壓時，可能不能完成其應有的功能。電連接器的額定電壓事實上應理解為生產(chǎn)廠推薦的最高工作電壓。原則上說，<strong><a href="http:///"><span style="color:#ff0000;">航空插頭</span></a></strong>在低于額定電壓下都能正常工作。筆者傾向于根據(jù)電連接器的耐壓(抗電強度)指標，按照使用環(huán)境，安全等級要求來合理選用額定電壓。也就是說，相同的耐壓指標，根據(jù)不同的使用環(huán)境和安全要求，可使用到不同的最高工作電壓。這也比較符合客觀使用情況。</span></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <strong><span style="font-size: 14px;">②<span style="text-indent: 28px;">航空插頭</span>額定電流</span></strong></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <span style="font-size: 14px;">額定電流又稱工作電流。同額定電壓一樣，在低于額定電流情況下，電連接器一般都能正常工作。在電連接器的設計過程中，是通過對電連接器的熱設計來滿足額定電流要求的，因為在接觸對有電流流過時，由于存在導體電阻和接觸電阻，接觸對將會發(fā)熱。當其發(fā)熱超過一定極限時，將破壞連接器的絕緣和形成接觸對表面鍍層的軟化，造成故障。因此，要限制額定電流，事實上要限制連接器內(nèi)部的溫升不超過設計的規(guī)定值。在選擇時要注意的問題是：對多芯連接器而言，額定電流必須降額使用。這在大電流的場合更應引起重視，例如φ3.5mm接觸對，一般規(guī)定其額定電流為50A，但在5芯時要降額33%使用，也就是每芯的額定電流只有 38A，芯數(shù)越多，降額幅度越大。</span></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <strong><span style="font-size: 14px;">③<span style="text-indent: 28px;">航空插頭</span>接觸電阻</span></strong></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <span style="font-size: 14px;">接觸電阻是指兩個接觸導體在接觸部分產(chǎn)生的電阻。在選用時要注意到兩個問題，第一，連接器的接觸電阻指標事實上是接觸對電阻，它包括接觸電阻和接觸對導體電阻。通常導體電阻較小，因此接觸對電阻在很多技術規(guī)范中被稱為接觸電阻。第二，在連接小信號的電路中，要注意給出的接觸電阻指標是在什么條件下測試的，因為接觸表面會附則氧化層，油污或其他污染物，兩接觸件表面會產(chǎn)生膜層電阻。在膜層厚度增加時，電阻迅速增大，是膜層成為不良導體。但是，膜層在高接觸壓力下會發(fā)生機械擊穿，或在高電壓，大電流下會發(fā)生電擊穿。<strong><a href="http:///"><span style="color:#ff0000;">航空插頭</span></a></strong>對某些小體積的連接器設計的接觸壓力相當小，使用場合僅為mA和mV級，膜層電阻不易被擊穿，可能影響電信號的傳輸。在GB5095《電在設備用機電元件基本試驗規(guī)程及測量方法》中的接觸電阻測試方法之一“接觸電阻——毫伏法“規(guī)定，為了防止接觸件上絕緣薄膜被擊穿，測試回路的開路電動勢的直流或交流峰值應不大于20mV，直流或交流試驗電流應不大于100mA。事實上這是一種低電平接觸電阻的測試方法，因此，有此要求的選擇者，因選用由低電平接觸電阻指標的連接器。</span></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <strong><span style="font-size: 14px;">④<span style="text-indent: 28px;">航空插頭</span>屏蔽性</span></strong></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <span style="font-size: 14px;">在現(xiàn)代電氣電子設備中，航空插頭元器件的密度以及它們之間相關功能的日益增加，對電磁干擾提出了嚴格的限制。所以連接器往往用金屬殼體封閉起來，以阻止內(nèi)部電磁能輻射或受到外界電磁場的干擾。在低頻時，只有磁性材料才能對磁場起明顯屏蔽作用。此時，對金屬外殼的電連續(xù)性有一定的規(guī)定，也就是外殼接觸電阻。</span></p> <p style="margin: 5px 0px; color: rgb(0, 0, 0); font-family: sans-serif; font-size: 16px; line-height: 2em; text-indent: 2em;"> <span style="margin: 0px; padding: 0px; list-style: none; text-indent: 2em; font-size: 14px;"><span style="margin: 0px; padding: 0px; list-style: none; text-indent: 32px;">相信大家一定對</span><strong style="margin: 0px; padding: 0px; list-style: none; text-indent: 32px;"><a href="http:///" style="margin: 0px; padding: 0px; list-style: none; border: 0px; line-height: 22px; text-decoration-line: none; border-spacing: 0px; color: rgb(51, 51, 51);"><span style="margin: 0px; padding: 0px; list-style: none; color: rgb(255, 0, 0);">航空插頭</span></a></strong></span><span style="font-size: 14px;"><span style="margin: 0px; padding: 0px; list-style: none;">有了更深入的了解，上?？朴姎庥邢薰荆瑢I航空插頭,防水連接器 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