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MOSFETS </a> </div> </div> <div class="rig_con"> <div class="top"> <h1 class="title"> 壓敏電阻老化解決方法-干貨 </h1> <div class="meg"> <div class="firsts">發布時間：2021-08-06</div> <div class="">已被瀏覽：<span>2339</span>次</div> <div class="shape"> <span>分享到：</span> <div class="bdsharebuttonbox" style="display:inline-block;vertical-align:middle;"><a href="#" class="bds_more" data-cmd="more"></a><a href="#" class="bds_qzone" data-cmd="qzone" title="分享到QQ空間"></a><a href="#" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a><a href="#" class="bds_sqq" data-cmd="sqq" title="分享到QQ好友"></a><a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a><a href="#" class="bds_renren" data-cmd="renren" title="分享到人人網"></a></div> <script> window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)]; </script> </div> </div> </div> <div class="con"> <span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;"><a href="http://www.forsakring-online.com/products/category-477/"><span style="color:#FF0000;"><strong>壓敏電阻</strong></span></a>是目前應用范圍最廣的電子元器件之一，在應用過程中，壓敏<a href="http://www.forsakring-online.com/">電阻</a>老化的問題是最大的缺點，嚴重干擾系統的正常安全工作。那么，有什么方法可以有效地抑制壓敏電阻的老化問題呢？本文介紹兩種方法，有效地解決壓敏電阻的老化情況。</span></span></span><br /> <img alt="壓敏電阻老化解決方法-干貨" src="/u_file/2104/photo/2104/2021040117493227.jpeg" /><br /> <span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;">壓敏電阻老化解決方法<br /> （1）壓敏電阻與陶瓷放電管并聯，可解決連續大電流后壓敏電阻性能退化的問題，延緩老化速度。通過與陶瓷放電管并聯操作，壓敏電阻在放電管未導通前開始工作，夾緊暫態過電壓，釋放大電流大電流，放電管通過后，與壓敏電阻并聯分流，減小壓敏電阻的通流壓力。從而縮短了壓敏電阻通過大電流的時間，有助于緩和壓敏電阻性能的退化。<br /> <br /> 在這種并聯操作過程中，工程師需要注意的一個問題是，如果壓敏電阻的參考電壓Uima選擇得太低，放電管可能在暫時過電壓期間不會放電。過電壓的能量全部由壓敏電阻釋放，不利于壓敏電阻Uima的數值必須大于放電管的直流放電電壓。必須指出，該井聯組合電路并未解決放電管可能產生的續流問題，因此不適用于交流電源系統的保護。<br /> <br /> （2）壓敏電阻與陶瓷放電管串聯，串聯電路圖如下圖所示</span></span></span><br /> <img alt="電路圖" src="/u_file/2108/photo/2108/2021080617144198.png" /><span style="font-family:新宋體,arial;"><span style="font-size:16px;"><span style="line-height:200%;"> <br /> 在正常運行狀態下，壓敏電阻在電路系統的工作中常常具有較大的寄生電容器，應用于交流電源系統的保護時，在正常運行狀態下會產生相當大的泄漏電流。例如，寄生電容器為2nF的壓敏電阻設置在220V、50hz的交流電源系統中，其泄漏電流達到0.14mA，大的泄漏電流往往會影響系統的正常運行。然而，當我們將壓敏電阻與陶瓷氣體放電管串聯時，由于放電管的寄生電容很小，整個串聯支路的總電容可以減少到幾。在這種串聯組合支路中，放電管起著開關作用。如果沒有暫態過電壓作用，可以將壓敏電阻與系統隔離，使壓敏電阻幾乎沒有泄漏電流。這樣可以降低壓敏電阻的參考電壓Uima，而不必考慮由此引起的泄漏電流增大，從而可以更有效地減緩壓敏電阻性能的衰退。<br /> <br /> 以上內容主要介紹壓敏電阻老化有效解決辦法，如需要壓敏電阻相關產品請留言聯系或<span style="color:#FF0000;">撥打：0755-28100016；</span>海量壓敏電阻現貨庫存，規格齊全。歡迎來咨詢價格或拿樣測試。<br /> <br /> 深圳順?？萍加邢薰臼且患乙源頌橹鞯碾娮釉骷?、半導體器件、保護器件的整合供應商，主營TVS瞬態抑制二極管、ESD靜電保護器、GDT陶瓷氣體放電管、TSS半導體放電管、NTC熱敏電阻、壓敏電阻、保險絲、合金電阻、貼片電阻、精密電阻、晶圓電阻、貼片保險絲、自恢復保險絲、貼片電容、鉭電容、電解電容、鋁電解電容、超級電容、連接器等相關產品線，品牌可選華德、碩凱、薩瑞微、億能、特思嘉、基美(KEMET)、天二、旺詮、大毅、村田、太誘、TDK、AVX、威世、風華、華新科、三瑩、國巨、立隆、厚聲、光頡、順絡、麥捷、禾伸堂等知名品牌。</span></span></span> </div> <div id="page" class="wow fadeInUp wrap"> <div class="page-btn prev">上一篇 : <a href="/faq/news-i01597i1.html">電阻的分類</a></div> <div class="page-btn next">下一篇 : <a href="/faq/news-i01425i1.html">了解插件（MOV）壓敏電阻一篇就夠-干貨</a></div> </div> <div class="returns"> <a href="/faq/category-11/page-2.html" class="returns"><img oncontextmenu="return false;" src="/images/return.png" /> 返回列表</a> </div> <div class="relate-title">相關知識解答</div> <div class="relate-list"> <div class="list fl"> <div class="list-title fl text-over"><span>» </span><a href="/faq/news-i02059i1.html">合金電阻特性與合金電阻生產流程</a></div> <div class="list-time fr 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