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id="gk3x8ba" class="tigs"> 發(fā)信息做推廣就找產(chǎn)品網(wǎng)<br />企業(yè)電商信息綜合服務平臺 </span><div id="rfbdvaq" class="searchbox"><div id="378srm8" class="searchLt"><div id="1scwv8o" class="tabs"><a href="JavaScript:;" data-type="product" class="active">產(chǎn)品</a><a href="JavaScript:;" data-type="member" class="">公司</a><a href="JavaScript:;" data-type="article" class="">資訊</a><a href="JavaScript:;" data-type="exhibition" class="">展會</a></div><div id="5npmoiv" class="clearfix searchWrap"><div id="rfh3i2f" class="searchInput"><input type="text" name="keywords" placeholder="請輸入搜索關鍵詞" id="kd"><a href="javascript:void(0)" class="searchBtn" id="search">搜索</a></div></div></div></div></header><nav class="navbox"><div id="bfcebnp" class="container"><ul><li id = "index_index"><a href="http://m.cdcfah.com/"><span>首頁</span></a></li><li id = "index_company"><a ><span>企業(yè)名錄</span></a></li><li id = "index_product"><a href="http://m.cdcfah.com/cp/"><span>產(chǎn)品供應</span></a></li><li id = "index_news"><a 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src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041410054963/9568029.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="xln3mg3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041410054963/9568029.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="w3df77l" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>武漢PFC電腦電源,PFC電源</p><p><span>***更新：</span>2020-12-02 09:19:28</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="nwdfro8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市保益新能電氣有限公司</a></p><p><span>聯(lián)系人：</span>葉立民</p><p><span>郵箱: </span>1301978383@qq.com</p><p><span>電話: </span>18675588113</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span>http://www.boynelectric.com</p><p><span>手機: </span>0755-21070344</p><p><span>地址: </span>大浪街道浪口社區(qū)華榮路496號德泰工業(yè)區(qū)1號廠房4層402</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="slikbiu" class="page-proshow02"><p class="title">詳細說明</p><div id="3fczg3a" class="box"><p><p style="text-indent:25px">PFC的英文全稱為“Power Factor Correction”，意思是“功率因數(shù)校正”，功率因數(shù)指的是有效功率與總耗電量（視在功率）之間的關系，也就是有效功率除以總耗電量（視在功率）的比值。基本上功率因數(shù)可以衡量電力被有效利用的程度，當功率因數(shù)值越大，表示其電力利用率越高。功率因數(shù)是用來衡量用電設備用電效率的參數(shù)，低功率因數(shù)表示低電力效能，武漢PFC電腦電源。為了提高用電設備功率因數(shù)的技術就稱為功率因數(shù)校正。簡介：計算機開關電源是一種電容輸入型電路，其電流和電壓之間的相位差會造成交換功率的損失，此時便需要PFC電路提高功率因數(shù)，武漢PFC電腦電源。目前的PFC有兩種，武漢PFC電腦電源，一種為被動式PFC（也稱無源PFC）和主動式PFC（也稱有源式PFC）。重量上主動式PFC比被動式PFC電路輕。武漢PFC電腦電源</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="武漢PFC電腦電源,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041410054963/9568029.png"></div><p style="text-indent:25px">主動式PFC的優(yōu)點：1、校正效果遠優(yōu)于歐洲的 EN 諧波規(guī)范，即便未來規(guī)格更趨嚴格也都能符合規(guī)定。隨著IC零件需求增加，成本將隨之降低。2、較無原料短缺的風險。3、較被動式專業(yè)的解決方案。4、能以較低成本帶來全域電壓的高附加價值。5、功率因素接近完美的99%，使電力利用率較佳化，對環(huán)保有益。6、因應未來CPU發(fā)展趨勢，輸出瓦特數(shù)(電力)要求將越高，主動式PFC因成本不隨輸出瓦特數(shù)增加而上升，故擁有較好競爭力。動式PFC優(yōu)于被動式PFC，因此，選擇節(jié)能型的電源必須選擇采用主動式PFC電路設計的電源。合肥主動PFC電源采購一般來說，功率在250W～300W的電源多采用被動式PFC。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="武漢PFC電腦電源,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406038737730808/982750.png"></div><p style="text-indent:25px">無源PFC的兩種方式：一是、直接將反激電路前級的400V大電解拿掉，換上CBB，于是輸入到電路中的電壓波形就是正弦波了，然后將電源的變壓器調(diào)節(jié)感量，使其達到DCM和CCM工作模式的臨界點上，調(diào)的準的，能將PF值調(diào)到0.9.這樣做的缺點也是一下就能看出來了，因為輸入電壓降低，效率降下一截，且由于沒有前級濾波電路紋流變大，電路的穩(wěn)定性也較大降低。二是、填谷電路，增加三只二極管，400V電解換成兩只250V的，這個電路比前面那個電路好一些，因為輸入級的紋波沒那么大。但輸入電壓的谷值是原來電解直接濾波的一半，峰值不變。也一樣會降低電源的效率和穩(wěn)定性。</p><p style="text-indent:25px">PFC電路原理?PFC就是“功率因數(shù)”的意思，主要用來表征電子產(chǎn)品對電能的利用效率。功率因數(shù)越高，說明電能的利用效率越高。?PFC有兩種，一種是無源PFC（也稱被動式PFC），一種是有源PFC（也稱主動式PFC）。無源PFC一般采用電感補償方法使交流輸入的基波電流與電壓之間相位差減小來提高功率因數(shù)，但無源PFC的功率因數(shù)不是很高，只能達到0.7~0.8；有源PFC由電感電容及電子元器件組成，體積小，可以達到很高的功率因數(shù)，但成本要高出無源PFC一些。?有源PFC電路中往往采用高集成度的IC，采用有源PFC電路的PC電源，至少具有以下特點：?（1）?輸入電壓可以從90V到270V；（?2）?高于0.99的線路功率因數(shù)，并具有低損耗和高可靠等優(yōu)點；?（3）?IC的PFC還可用作輔助電源，因此在使用有源PFC電路中，往往不需要待機變壓器；?（4）?輸出不隨輸入電壓波動變化，因此可獲得高度穩(wěn)定的輸出電壓；?5）?有源PFC輸出DC電壓紋波很小，且呈100Hz/120Hz（工頻2倍）的正弦波，因此采用有源PFC的電源不需要采用很大容量的濾波電容?！半姼醒a償式”包括靜音式和非靜音式。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="武漢PFC電腦電源,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406038577291288/3249165.png"></div><p style="text-indent:25px">PFC的全稱是Power Factor Corrector，意思是功率因數(shù)校正器，它可以在交流轉(zhuǎn)換為直流時提高電源對市電的利用率，但不能減小轉(zhuǎn)換過程的電能損耗，也沒有節(jié)約電能的功能。主動式PFC電源：此外，PFC還能減少電源對市電電網(wǎng)的干擾，尤其是避免它在突然啟動時對其他電器的影響。PFC分為主動式（有源）和被動式（無源）兩種，它們是衡量電源檔次高低的一個重要因素。一般來說，功率在250W～300W的電源多采用被動式PFC，而主動式PFC則常用于400W及以上的中高類型的電源。就性能而言，主動式PFC擁有更高的功率因數(shù)（高達99%），配合好的電路設計，能適應更高的電壓范圍。你可以通過電源散熱孔查看該產(chǎn)品采用了何種PFC電路：被動式PFC通常為一塊體積較大的電感，由多塊硅鋼片外部纏繞銅線而成；而主動式PFC則由電感線圈配合IC控制芯片組成?！半姼醒a償式”是使交流輸入的基波電流與電壓之間相位差減小來提高功率因數(shù)。被動式電源pfc價格</p><p style="text-indent:25px">為了提高用電設備功率因數(shù)的技術就稱為功率因數(shù)校正。武漢PFC電腦電源</p><p style="text-indent:25px">電感補償式的被動式PFC有結(jié)構(gòu)簡單、成本低廉的優(yōu)勢，但是其電感的體積和重量都會隨著電源額定功率的提升而增加，因此被動式PFC基本上不會用在額定功率比較高的電源產(chǎn)品中。另外由于被動式PFC電源往往有著比較高的重量，因此在玩家群體里產(chǎn)生了一種“電源越重品質(zhì)越好”的判斷方法，這個判斷法一直沿用至今，雖然現(xiàn)在基本已經(jīng)沒有實用價值，但仍然被不少剛?cè)腴T的玩家奉為信條。值得一提的是，由于有這樣的判斷法，在被動式PFC電源仍是主流的年代，有不少假冒偽劣產(chǎn)品會采用假的PFC電感，這些電感在表面上和真品沒什么區(qū)別，但實際上可能只有硅鋼片而沒有銅線繞圈，甚至只是灌裝水泥冒充的，以增加電源的重量。因此“電源越重品質(zhì)越好”的判斷方法就算有些參考意義，但顯然不會是一定的判斷標準。采用假PFC的電源，其PF值只有0.5到0.6的水平。此外被動式PFC電源對輸入電壓的穩(wěn)定性有一定的要求，基本上電壓波動的允許范圍不會太廣。而且由于被動式PFC適合在比較高的電壓下使用，因此采用110V輸入設計的被動式PFC電源還需要添加一個倍壓器，將輸入電壓從110V增加至220V，以保證PFC電路工作的正常。武漢PFC電腦電源</p><p style="text-indent:25px">深圳市保益新能電氣有限公司主要經(jīng)營范圍是電工電氣，擁有一支專業(yè)技術團隊和良好的市場口碑。公司業(yè)務分為UPS/EPS電源，雙向逆變器，安防電源，激光儲能電源等，目前不斷進行創(chuàng)新和服務改進，為客戶提供良好的產(chǎn)品和服務。公司秉持誠信為本的經(jīng)營理念，在電工電氣深耕多年，以技術為先導，以自主產(chǎn)品為重點，發(fā)揮人才優(yōu)勢，打造電工電氣良好品牌。保益新能立足于全國市場，依托強大的研發(fā)實力，融合前沿的技術理念，飛快響應客戶的變化需求。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2235611.html</p></div></div></div></div></div><div id="7bdaxeb" 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