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class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041362838188/2093902.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="32suwdv" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041362838188/2093902.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8bsebxj" class="content"><p><span>需求數量：</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>產品關鍵詞：</span>合肥主動PFC電源采購,PFC電源</p><p><span>***更新：</span>2020-12-02 10:22:04</p><p><span id="click" >瀏覽次數：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="jyahzlx" 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="aubtamj" class="page-proshow02"><p class="title">詳細說明</p><div id="3likmy3" class="box"><p><p style="text-indent:25px">開關電源pfc常見故障：無直流電壓輸出或電壓輸出不穩(wěn)定：如果保險絲是完好的，在有負載情況下，各級直流電壓無輸出。這種情況主要是以下原因造成的：電源中出現開路、短路現象，過壓、過流保護電路出現故障，輔助電源故障，振蕩電路沒有工作，電源負載過重，高頻整流濾波電路中整流二極管被擊穿，合肥主動PFC電源采購，濾波電容漏電等。在用萬用表測量次級元件，排除了高頻整流二極管擊穿、負載短路的情況后，如果這時輸出為零，則可以肯定是電源的控制電路出了故障。若有部分電壓輸出說明前級電路工作正常，合肥主動PFC電源采購，合肥主動PFC電源采購，故障出在高頻整流濾波電路中。高頻濾波電路主要由整流二極管及低壓濾波電容組成直流電壓輸出，其中整流二極管擊穿會使該電路無電壓輸出，濾波電容漏電會造成輸出電壓不穩(wěn)等故障。用萬用表靜態(tài)測量對應元件即可檢查出其損壞的元件。無源PFC電路是以**電源的效率和穩(wěn)定性為代價的。合肥主動PFC電源采購</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="合肥主動PFC電源采購,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041362838188/2093902.png"></div><p style="text-indent:25px">PFC電路原理?PFC就是“功率因數”的意思，主要用來表征電子產品對電能的利用效率。功率因數越高，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，但無源PFC的功率因數不是很高，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，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，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。合肥主動PFC電源采購目前電路負載基本上可以分為兩種模式，其一為電阻型負載，另外一種則是電抗型負載。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="合肥主動PFC電源采購,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041284644784/1270972.png"></div><p style="text-indent:25px">開關電源中的pfc是什么意思？PFC就是功率因數校正，由于開關電源不是純電阻負載，屬于容性負載，大量的開關電源同時使用會干擾電網，使電網不平衡。一般開關電源的功率因數PF為0.6左右。理想的純電阻負載功率因數PF為1，開關電源經功率因數PF校正后可以達到0.8以上！開關電源功率因素低，會影響電網的使用效率，比如：10KW的電力變壓器，如果使用功率因數PF為0.6，功率1KW的開關電源，只能同時帶動6臺這樣的開關電源，如果使用功率因數PF為0.9，功率1KW的開關電源，可以同時帶動9臺這樣的開關電源！大量使用功率因素低的開關電源，會將許多功率消耗在電線上，使電線發(fā)熱。還會使電網的正弦波失真變形，影響其它電器的正常使用。一般大功率開關電源，都要求功率因數PF在0.8以上！對于手機充電器這樣的小功率開關電源，沒有要求。對于LED電源，有些對功率因數也有要求。</p><p style="text-indent:25px">pfc對電源的重要性：在一個純電抗負載電路中，電壓和電流之間會產生一定的是時間差，也就會出現相位差（zui大理論值為90度，一般情況多為45度），那么電壓與電流的乘積，就不一定每一時刻都為“正”了。在一個半周期內，能量為“正”，另外一個半周期內能量為“負”，那么就是說，前半周期電源從電網中獲取能量，而在后半個周期內，這些能量又會回流到國家電網中。所以如果按照一個周期計算，那么電源獲得的能量會為“零”，沒有能量。上面的兩種描述都是純理論的理想狀態(tài)。但在實際應用中，電路中會有大量的電阻、電感和電容，在同一時刻都會有負載，也就會產生不同方向的“能量”。因此，所有的正向能量，我們稱其為“實際功率”，而反向回流電網的能量則稱之為“無用功率”，那么“實際功率”與“無用功率”的綜合，就是之前我們所說的“視在功率”。但正如我們之前所提到的，“功率因數”實際上就是“實際功率”與“視在功率”的比值。而zui為理想的比值為“1”，當然這還無法做到，因此只能無限接近于“1”，這個數值我們一般稱之為“功率因數”。主動式PFC則由電感線圈配合IC控制芯片組成。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="合肥主動PFC電源采購,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406038577291288/3249165.png"></div><p style="text-indent:25px">開關電源中的pfc是什么意思？PFC的意思是功率因數校正。PFC意思是功率因數校正，功率因數指的是有效功率與總耗電量之間的關系，也就是有效功率除以總耗電量的比值?；旧瞎β室驍悼梢院饬侩娏Ρ挥行Ю玫某潭?，當功率因數值越大，表示其電力利用率越高。PFC是電腦電源中的一個非常重要的參數，等于“視在功率乘以功率因素”，即：功率因素=實際功率/視在功率。功率因素：功率因數表征著電腦電源輸出有功功率的能力。功率是能量的傳輸率的度量，在直流電路中它是電壓V和電流A和乘積。原理：1、電流波形是斷續(xù)的，其包絡線和電壓波形相同，并且包絡線和電壓波形相位同相。2、由于斬波的作用，半波脈動的直流電變成高頻（由斬波頻率決定，約100KHz）“交流”電，該高頻“交流”電要再次經過整流才能被后級PWM開關穩(wěn)壓電源使用。3、從外供電總的看該用電系統(tǒng)做到了交流電壓和交流電流同相并且電壓波形和電流波形均符合正弦波形，既解決了功率因素補償問題，也解決電磁兼容(EMC)和電磁干擾(EMI)問題?！肮β室驍敌Ｕ?，通俗的話說，就是提高有用功的比重。深圳主動式電源pfc廠家聯(lián)系方式</p><p style="text-indent:25px">計算機開關電源是一種電容輸入型電路。合肥主動PFC電源采購</p><p style="text-indent:25px">什么是主動式PFC？主動式PFC在結構上來說基本就是一個通過PWM控制電流波形的AC/DC整流器，交流輸入通過整流橋進行整流，然后PWM觸發(fā)主動PFC電路中的MosFET管，分離中間直流電壓到恒定脈沖序列，隨后這些脈沖信號通過濾波電容，將相對平順的電流送到主開關電路。此外我們可以在主動式PFC電路中看到一個體積相對較大的電感線圈，這個電感線圈可以對電流起到緩沖和梳理的作用，當然它在體積和重量上比起被動式PFC的電感要小很多。從設計結構上來說，主動式PFC顯然比被動式PFC更復雜，成本也更高。但是主動式PFC有著更寬廣的電壓適應能力，在電壓波動較大的情況下仍然可以穩(wěn)定工作，不少產品甚至直接支持110V到220V電壓的輸入。同時在功率因數校正的效果上，主動式PFC也有凌駕于被動式PFC，可以輕松達到0.9以上，部分高級產品甚至可以實現無限接近于1的效果。此外由于主動式PFC電路的體積和重量都遠小于被動式PFC，隨著電源額定功率的提升，其在體積和重量上的變化也不會很大，因此在被動式PFC電源上“越重越好”的標準其實并不適合主動式PFC電源。合肥主動PFC電源采購</p><p style="text-indent:25px">深圳市保益新能電氣有限公司致力于電工電氣，以科技創(chuàng)新實現***管理的追求。公司自創(chuàng)立以來，投身于UPS/EPS電源，雙向逆變器，安防電源，激光儲能電源，是電工電氣的主力軍。保益新能不斷開拓創(chuàng)新，追求出色，以技術為先導，以產品為平臺，以應用為重點，以服務為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務。保益新能始終關注電工電氣行業(yè)。滿足市場需求，提高產品價值，是我們前行的力量。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2236113.html</p></div></div></div></div></div><div id="833i2bd" class="page-right twoColRt"><div id="qqifxoi" class="box01 margin10 clearfix"><h3><a 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