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MOSFETS </a> </div> </div> <ul class="info_list"> <li class="item relative wow fadeInUp" data-wow-delay="0s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">09</span> <span class="ym">2022-05</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01889i1.html">PPTC自恢復保險絲在投影設備中的應用介紹</a> </div> <div class="brief text-line trans"> PPTC自恢復保險絲在投影設備中的應用介紹，投影儀的基本工作原理是通過主機控制板的相關控制使它們會將光線照射到圖像的顯示元件上從而產生圖像然后通過鏡頭投射。投影儀需要很大的功率才能將電信號轉換成光信號。一般情況下，工作電流為6-7A。高壓整流降低工作電壓后，工作電壓約為30V。投影儀中的大功率管會隨著電流的持續時間而加熱和上升。機器的某些部件很容易長期損壞，導致電路異?；蚨搪?。電路中的故障電流將成倍增加，高達數十安培，如果沒有過電流保護，機器將嚴重燒毀，這將導致火災和無法彌補的損失。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.1s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">08</span> <span class="ym">2021-11</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01595i1.html">PPTC自恢復保險絲與自恢復保險絲應用</a> </div> <div class="brief text-line trans"> 自恢復保險絲是一種過電流電子器件保護元器件，選用高分子材料有機化學高聚物在髙壓，高溫，硫化橡膠反映的前提下，攙加導電性粒子原材料后，通過獨特的技術生產而成。傳統式保險絲過電流保護，僅能保護一次，燒斷掉需拆換，而自恢復保險絲具備過電流超溫保護，全自動恢復雙向作用。在生活習慣上把PPTC也叫自恢復保險絲。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.2s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">08</span> <span class="ym">2021-11</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01594i1.html">PTC自恢復保險絲測試方法</a> </div> <div class="brief text-line trans"> ptc自恢復保險絲一般性測試主要檢測：常溫下檢測（25度+-2度）1） R0（零功率電阻），就是元件本身的內阻值，每個型號有標稱的阻值范圍，看是否在范圍內； 2) Ih(正常工作電流），在這個電流下，元件不能發生保護，應正常維持工作。 3）It(保護電流），一般取2倍工作電流或5倍工作電流，在這個電流下，規定時間內，保險絲要進入高阻狀態，達到保護目的。4）耐電壓·耐電流能力，在元件標稱的最大工作電壓，最大承受電流下，保護狀態一段時間，元件不能燒毀。其他的檢測，如鹽霧試驗等，就根據需要了。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.3s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">08</span> <span class="ym">2021-11</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01593i1.html">自恢復保險絲的工作原理</a> </div> <div class="brief text-line trans"> 自恢復保險絲的工作原理——自恢復保險絲的作用就是用于電路中的過流保護。一個擁有精密儀器的回路中一定會有保險絲的存在以保護精密儀器的安全。但是如果在頻繁使用的時候經常人為更換保險絲就很不實際，這是自恢復保險絲就被派上了用場。能夠自動連通回路電流，使得人們不用手動更換保險絲，這樣就會使工作效率大大增加。過流保護是指很多電子設備都有個額定電流，不允許超過額定電流，不然會燒壞設備，在破壞關鍵儀器之前被某些電子器件阻斷震蕩電流，從而保護關鍵儀器的過程。而在這個過程中能夠阻斷震蕩電流的器件，往往就是保險絲，但是普通的保險絲只能是一次性的，而如果使用自恢復保險絲，那么就能夠使用處于這種回路中的儀器進行試探工作。 </div> </div> <div class="clear"></div> </li> <li class="item relative wow fadeInUp" data-wow-delay="0.4s" data-wow-duration="1.2s"> <div class="date absolute"> <span class="d">19</span> <span class="ym">2021-10</span> </div> <div class="info absolute"> <div class="title trans text-over"> <a class="trans" href="/faq/news-i01585i1.html">淺析微型保險絲挑選方法步驟</a> </div> <div class="brief text-line trans"> 微型保險絲主要用于數碼相機、筆記本電腦、手機等電子產品。從傳統的玻璃管保險絲到微型保險絲，由于產品技術的不同，它們的選擇重點也略有不同。微型保險絲的選擇觸及有一下要素。 </div> </div> <div class="clear"></div> </li>  </ul> </div> <div class="wrap"> <div class="blank50"></div> <div id="turn_page"><span><font class='page_noclick'><em class='icon_page_prev'></em> 上一頁</font></span><span class='haha'><font class='page_item_current'>1</font></span><span class='haha2'><a href='/faq/category-0012/page-2.html' class='page_item'>2</a></span><span class='haha2'><a href='/faq/category-0012/page-3.html' class='page_item'>3</a></span><span class='haha2'><a href='/faq/category-0012/page-4.html' class='page_item'>4</a></span><span class='haha2'><a href='/faq/category-0012/page-5.html' class='page_item'>5</a></span><span class='haha2'><a href='/faq/category-0012/page-6.html' class='page_item'>6</a></span><span class='haha2'><a href='/faq/category-0012/page-7.html' class='page_item'>7</a></span><span><font class='page_item'>...</font></span><span><a 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