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MOSFETS </a> </div> </div> <div class="rig_con"> <div class="top"> <h1 class="title"> PPTC自愈保險絲在投影設備中的應用介紹 </h1> <div class="meg"> <div class="firsts">發布時間：2022-05-09</div> <div class="">已被瀏覽：<span>336</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="line-height:200%;"><span style="font-size:15px;"><span style="font-family:微軟雅黑,arial;"> 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。</span></span></span><br /> <img src="/u_file/2202/photo/2202/2022022516380613.png" style="height: 346px; width: 500px;" /><br /> <span style="line-height:200%;"><span style="font-size:15px;"><span style="font-family:微軟雅黑,arial;"> 在投影儀過流保護的設計過程中，一些工程師使用<a href="http://www.520peixun.com"><strong>一次性保險絲</strong></a>，這仍然容易出現問題。如果一次性熔斷器過大，不能熔斷超過額定值，則不能起到保險作用，不安全。如果太小，在達到額定值之前會熔斷，影響正常功耗。<br /> 在設計時，設計師可以使用PPTC自愈保險絲進行過電流保護。它是由高分子聚合物和納米導電顆粒經過特殊加工而成。如果發生故障，電路中的電流將呈指數增長。通過自愈保險絲，PPTC會產生熱量，迅速變成高電阻，并斷開導電鏈路路徑，達到保護目的。只要故障被排除，它就會再次通電，你就可以繼續工作。</span></span></span> <hr />方案推薦：<a href="http://www.520peixun.com/products/contents/3280.html"><strong><span style="line-height:200%;"><span style="font-size:16px;"><span style="font-family:微軟雅黑,arial;">華德一次性保險絲<img src="/u_file/2201/photo/2201/2022011714515458.jpeg" /></span></span></span></strong></a> </div> <div id="page" class="wow fadeInUp wrap"> <div class="page-btn next">下一篇 : <a href="/faq/news-i01595i1.html">PPTC自恢復保險絲與自恢復保險絲應用</a></div> </div> <div class="returns"> <a href="/faq/category-12/page-1.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 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