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src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041293638980/8296733.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="k3399fg" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041293638980/8296733.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="abifh3l" 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(guān)鍵詞：</span>深圳主動式電源pfc銷售,PFC電源</p><p><span>***更新：</span>2021-01-11 10:15:27</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="3m8yk78" 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(dāng)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="eipmdh7" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="pi7e8fr" class="box"><p><p style="text-indent:25px">我們?yōu)槭裁匆x擇主動式PFC電源？如果**是從省電費的角度來考慮，電源是采用主動式PFC、被動式PFC甚至是有無PFC都沒有什么關(guān)系，因為省錢與否的關(guān)鍵是在電源的轉(zhuǎn)換效率。但是實際與理論總是有一些差別的，從客觀事實來說，同樣額定功率的電源產(chǎn)品，主動式PFC電源大部分確實有著比被動式PFC產(chǎn)品更高的轉(zhuǎn)換效率，因為前者往往在做工、用料和架構(gòu)上都會有更高的水平，品質(zhì)也會更好，深圳主動式電源pfc銷售，深圳主動式電源pfc銷售，所以主動式PFC電源產(chǎn)品在客觀上確實要更省電費，深圳主動式電源pfc銷售，雖然兩者沒有必然的聯(lián)系。與被動式PFC相比，主動式PFC電路省去了一個較大體積的含有硅鋼片的電感。深圳主動式電源pfc銷售</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳主動式電源pfc銷售,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041293638980/8296733.png"></div><p style="text-indent:25px">如何快速維修pfc電路：4、電源板可以從電視上摘下**維修，維修時只需要把開關(guān)機控制電路三極管C、E短接（或?qū)⒁恢?.5K左右的電阻與副電源的+5V輸出端相連》，整機就處于開機狀態(tài)，各路電壓均有輸出。在部分液晶采電的開關(guān)電源中，只有+ 12V或+24V輸出端帶有一定功率的負(fù)載，主開關(guān)電源才進行正常的工作狀態(tài)。所以在+24V輸出端上你可以接一只電動自行車的36 V燈泡作假負(fù)載（或在+ 12V輸出端接一只摩托車燈泡作假負(fù)載）即可。5、液晶電源通電后，副電源先工作，輸出+5V電壓給數(shù)字板上的CPU，此時整機處于待機狀態(tài)。當(dāng)按”待機“鍵后，CPU輸出開機電平，PFC 電路先工作，將+300V脈動直流電壓轉(zhuǎn)換成正常的直流電壓（+380V）后，這時主開關(guān)電源的脈寬振蕩器才開始工作; 接著主開關(guān)變壓器次級輸出+ 12V、+24V電壓，整機進入正常工作狀態(tài)。深圳主動式電源pfc銷售在PFC開關(guān)電源當(dāng)中，開關(guān)穩(wěn)壓電源是非常重要的一個組成部分。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳主動式電源pfc銷售,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406038635709246/2295771.png"></div><p style="text-indent:25px">被動式PFC的缺點：1、當(dāng)歐洲EN的諧波規(guī)范越來越嚴(yán)格時，電感量產(chǎn)的質(zhì)量需提升，而生產(chǎn)難度將提高。2、沉重重量增加電源供應(yīng)器在運輸過程損壞的風(fēng)險。3、原料短缺的風(fēng)險較高。4、如電源內(nèi)部結(jié)構(gòu)固定的不正確，容易產(chǎn)生震動噪音。5、當(dāng)電源供應(yīng)器輸出超過300瓦以上，被動式PFC在材料成本及產(chǎn)品性能表現(xiàn)上將越不具競爭力。PFC作為決定電源轉(zhuǎn)換效率的重要因素，其主要分為主動PFC與被動PFC。前者帶來的是更高的功率因數(shù)但成本也會有很大的增加，后者雖然價格低廉但功率因數(shù)也會有所下降。主動PFC電路本身損耗的電能比起被動PFC電路更高，從而直接降低了電源的轉(zhuǎn)換效率，因為有更多的電能并沒有被實際負(fù)載利用上。PFC電路所調(diào)節(jié)的功率因數(shù)，是給電廠節(jié)省了電能，而并沒有真正給用戶節(jié)省。</p><p style="text-indent:25px">pfc對電源的重要性：在一個純電抗負(fù)載電路中，電壓和電流之間會產(chǎn)生一定的是時間差，也就會出現(xiàn)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(nèi)，能量為“正”，另外一個半周期內(nèi)能量為“負(fù)”，那么就是說，前半周期電源從電網(wǎng)中獲取能量，而在后半個周期內(nèi)，這些能量又會回流到國家電網(wǎng)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(yīng)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(fù)載，也就會產(chǎn)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(wǎng)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(shù)”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(dāng)然這還無法做到，因此只能無限接近于“1”，這個數(shù)值我們一般稱之為“功率因數(shù)”。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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳主動式電源pfc銷售,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406038609127250/5992744.png"></div><p style="text-indent:25px">開關(guān)電源中的pfc是什么意思？PFC的意思是功率因數(shù)校正。PFC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之間的關(guān)系，也就是有效功率除以總耗電量的比值?；旧瞎β室驍?shù)可以衡量電力被有效利用的程度，當(dāng)功率因數(shù)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(shù)，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(shù)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(luò)線和電壓波形相同，并且包絡(luò)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(jīng)過整流才能被后級PWM開關(guān)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。無源PFC電路是以**電源的效率和穩(wěn)定性為代價的。深圳主動式電源pfc銷售</p><p style="text-indent:25px">“填谷電路式”的特點是利用整流橋后面的填谷電路來大幅度增加整流管的導(dǎo)通角。深圳主動式電源pfc銷售</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(dá)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(dá)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。深圳主動式電源pfc銷售</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2800915.html</p></div></div></div></div></div><div id="aelnu8c" class="page-right twoColRt"><div id="uo328j7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="w8izgf2" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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