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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="fe3if8p" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>青島PFC電腦電源多少錢,PFC電源</p><p><span>***更新：</span>2020-12-02 02:13:14</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="c8wif32" 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(jī): </span>0755-21070344</p><p><span>地址: </span>大浪街道浪口社區(qū)華榮路496號(hào)德泰工業(yè)區(qū)1號(hào)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="pykrizb" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="3d7czwi" class="box"><p><p style="text-indent:25px">主動(dòng)PFC電路由高頻電感、開關(guān)管、電容以及控制IC等元件構(gòu)成。電路的特點(diǎn)是構(gòu)造復(fù)雜，但優(yōu)點(diǎn)很多：功率因數(shù)高達(dá)0，青島PFC電腦電源多少錢，青島PFC電腦電源多少錢.99、低損耗和高可靠、輸入電壓可以從90V到270V（寬幅輸入）等，由于輸出DC電壓紋波很小，青島PFC電腦電源多少錢，因此采用主動(dòng)式PFC的電源不需要采用很大容量的濾波電容。被動(dòng)式PFC通常為一塊體積較大的電感，其內(nèi)部由多塊硅鋼片外部纏繞銅線而組成。功率因數(shù)不是很高，只能達(dá)到0.7~0.8，因此其效率也比較低，發(fā)熱量也比較大。被動(dòng)式PFC也并非一無(wú)是處，其結(jié)構(gòu)簡(jiǎn)單，穩(wěn)定性上表現(xiàn)好，比較適合中低端電源。希望你根本個(gè)人的實(shí)際情況選擇！被動(dòng)式PFC一般分“電感補(bǔ)償式”和“填谷電路式（Valley Fill Circuit）”。青島PFC電腦電源多少錢</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青島PFC電腦電源多少錢,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406041344381105/9656200.png"></div><p style="text-indent:25px">如何快速維修pfc電路：8、主開關(guān)電壓+24V或+12 V的輸出電流較大，對(duì)整流二極管要求較高，一般采用低壓差的大功率肖特基二極管，不能用普通的整流二極管替換。另外接負(fù)載后，電壓反而上升，多屬于電源濾波不好引起。9、電源帶負(fù)載能力差，首先要測(cè)一下PFC 電壓是否正常（380 v），如果正常，問(wèn)題就在電源厚膜上，通常是電源厚膜帶載能力差引起，這一點(diǎn)請(qǐng)大家注意。10、電源板上，貼有**三角形標(biāo)記的散熱片以及散熱片下面的電路，均為熱地。嚴(yán)謹(jǐn)直接用手接觸！注意任何檢測(cè)設(shè)備，都不能直接跨接在熱地和冷地之間。濟(jì)南被動(dòng)式PFC電源價(jià)格“電感補(bǔ)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="青島PFC電腦電源多少錢,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(gè)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(shí)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(dòng)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(guò)整流才能被后級(jí)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(bǔ)償問(wèn)題，也解決電磁兼容(EMC)和電磁干擾(EMI)問(wèn)題。</p><p style="text-indent:25px">主動(dòng)式PFC和被動(dòng)式PFC電源共同與不同之處簡(jiǎn)單地說(shuō)，主動(dòng)式PFC就是一個(gè)有源的升壓電路。它通過(guò)高頻電感線圈、開關(guān)電子管、高壓濾波電容以及控制IC等元件，組成一個(gè)可以將輸入電壓提高的電路，通過(guò)升高輸入電壓來(lái)減少電流在流向下級(jí)電路中的電能損耗。為什么升高輸入電壓會(huì)減少電能損耗呢？我們知道，功率P=UI，在電網(wǎng)的輸入總功率P一定的情況下，只要提高電壓，電流值就會(huì)變小，從而降低電路的電能損耗。我們國(guó)家的電網(wǎng)系統(tǒng)之所以要采用高壓電線來(lái)傳輸電能，也是出于降低能耗的考慮。主動(dòng)式PFC在結(jié)構(gòu)上來(lái)說(shuō)基本就是一個(gè)通過(guò)PWM控制電流波形的AC/DC整流器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青島PFC電腦電源多少錢,PFC電源" src="https://tyunfile.71360.com/WaterMark/UploadFile/baoyixinneng/637406038685836223/2985647.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(shí)只需要把開關(guān)機(jī)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(jī)就處于開機(jī)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(jìn)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(dòng)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(shí)整機(jī)處于待機(jī)狀態(tài)。當(dāng)按”待機(jī)“鍵后，CPU輸出開機(jī)電平，PFC 電路先工作，將+300V脈動(dòng)直流電壓轉(zhuǎn)換成正常的直流電壓（+380V）后，這時(shí)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(jí)輸出+ 12V、+24V電壓，整機(jī)進(jìn)入正常工作狀態(tài)。主動(dòng)式PFC通過(guò)升高輸入電壓來(lái)減少電流在流向下級(jí)電路中的電能損耗。青島PFC電腦電源多少錢</p><p style="text-indent:25px">無(wú)源PFC電路是以**電源的效率和穩(wěn)定性為代價(jià)的。青島PFC電腦電源多少錢</p><p style="text-indent:25px">與被動(dòng)式PFC相比，主動(dòng)式PFC電路省去了一個(gè)較大體積的含有硅鋼片的電感，因此重量上也可能會(huì)比被動(dòng)式PFC電路輕。而作為其明顯區(qū)別就是一個(gè)電感線圈，不過(guò)卻不能因此判斷電源是否主動(dòng)式PFC，因?yàn)殡娫磧?nèi)部的電感線圈較多，沒(méi)有電路知識(shí)的人并不能加以區(qū)分。由于主動(dòng)式PFC電源PFC電路自身需要消耗一定電能，如果使用在低功率（300W以下）電源中往往不如被動(dòng)式PFC電源省電，因此在此類產(chǎn)品中并不常見。另外，因?yàn)橹鲃?dòng)式PFC電路的升壓能力，能容許較低的輸入電壓，所以適應(yīng)市電通常范圍較寬（達(dá)到110V-240V）。當(dāng)然，zui明顯的識(shí)別方式，莫過(guò)于通過(guò)產(chǎn)品外殼銘牌上的標(biāo)注來(lái)識(shí)別，有寫明“主動(dòng)式PFC”或者“AcTIve PFC”即是主動(dòng)式PFC。我們知道電源的PFC電路是為了提高電源的功率因數(shù)而設(shè)，但是“功率因數(shù)”并不就等于“轉(zhuǎn)換效率”，有人將主動(dòng)式0.99的功率因數(shù)理解為能得到99%的電源轉(zhuǎn)換效率，很顯然這是不對(duì)的。雖然兩個(gè)都是描述省電的概念，但對(duì)于電腦用戶而言，兩個(gè)概念的意義是不一樣的。青島PFC電腦電源多少錢</p><p style="text-indent:25px">深圳市保益新能電氣有限公司總部位于大浪街道浪口社區(qū)華榮路496號(hào)德泰工業(yè)區(qū)1號(hào)廠房4層402，是一家電氣設(shè)備、電源產(chǎn)品、逆變器，UPS，通訊電源，儲(chǔ)能電源產(chǎn)品、工業(yè)電源、電池充放電電源設(shè)備、電池充放電管理系統(tǒng)設(shè)備、數(shù)字電源、無(wú)功補(bǔ)償器或者功率矯正器、數(shù)字控制技術(shù)軟件、工業(yè)控制軟件、電力計(jì)量產(chǎn)品、新能源設(shè)備、太陽(yáng)能、并網(wǎng)逆變器、離網(wǎng)逆變器、匯流箱、控制器，通訊設(shè)備產(chǎn)品、節(jié)能電子產(chǎn)品、回饋式電源負(fù)載的研發(fā)、銷售及相關(guān)信息咨詢。的公司。保益新能深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的UPS/EPS電源，雙向逆變器，安防電源，激光儲(chǔ)能電源。保益新能致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來(lái)良好體驗(yàn)。保益新能始終關(guān)注電工電氣行業(yè)。滿足市場(chǎng)需求，提高產(chǎn)品價(jià)值，是我們前行的力量。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/2226911.html</p></div></div></div></div></div><div id="s7xe3qi" class="page-right twoColRt"><div id="ga22dbd" 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