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class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_dgdq/">電工電氣</a>?<a href="http://www.cdcfah.com/cp/second-dgdq_dianyuan/">電源</a>?<a href="http://www.cdcfah.com/cp/third-dianyuan_qtdy/">其他電源</a>?河南大功率電源模塊供應(yīng)商服務(wù)為先上海多商電子供應(yīng)</p><div id="3o8s8ki" class="leftbox clearfix"><h1>河南大功率電源模塊供應(yīng)商服務(wù)為先上海多商電子供應(yīng)</h1><div id="dk2hqud" class="proBig"><div id="hfbcntm" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060769491026/1799904.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="vdu8edz" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060769491026/1799904.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="2zntuag" 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>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>河南大功率電源模塊供應(yīng)商,大功率電源模塊</p><p><span>***更新：</span>2021-02-03 13:22:08</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="g8sy7yk" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海多商電子有限公司</a></p><p><span>聯(lián)系人：</span>吳加斌</p><p><span>郵箱: </span>wu867@126.com</p><p><span>電話: </span>18121221687</p><p><span>傳真: </span>021_69585559</p><p><span>網(wǎng)址: </span>http://www.10000kw.com</p><p><span>手機(jī): </span>021-69585559</p><p><span>地址: </span>上海市嘉定區(qū)科福路358號(hào)4號(hào)樓4樓</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="8mnokvw" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="388zafw" class="box"><p><p style="text-indent:25px">大功率電源模塊里要有無濾波設(shè)計(jì)、電源模塊所在的設(shè)備里有無安規(guī)要求（漏電流、絕緣耐壓、濕度要求）、溫升特性、轉(zhuǎn)換效率、輸入電壓的波動(dòng)范圍、負(fù)載調(diào)整率等等，要求的地方還是不少的。推挽式電源電流瞬態(tài)響應(yīng)速度很高，電壓輸出特性很好，在所有拓?fù)浣Y(jié)構(gòu)中，是利用率較高的一種開關(guān)電源，無漏磁，驅(qū)動(dòng)電路簡(jiǎn)單。輸入電壓偏高輸入電壓過高，非常容易燒毀電路，帶來危害較大，哪些常見原因易造成電壓偏高呢？輸出端懸空或無負(fù)載；輸出端負(fù)載過輕，輕于10%的額定負(fù)載；輸入電壓偏高或干擾電壓。大功率電源模塊的拓?fù)浣Y(jié)構(gòu)有多種，反激，河南大功率電源模塊供應(yīng)商，河南大功率電源模塊供應(yīng)商、正激，河南大功率電源模塊供應(yīng)商、推挽、半橋、全橋多種。河南大功率電源模塊供應(yīng)商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南大功率電源模塊供應(yīng)商,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060769491026/1799904.png"></div><p style="text-indent:25px">浪涌電壓來源：雷擊引起的浪涌，當(dāng)發(fā)生雷擊時(shí)，通訊電路會(huì)產(chǎn)生感應(yīng)，形成浪涌電壓或電流；系統(tǒng)應(yīng)用中負(fù)載的切換及短路故障也會(huì)引起浪涌；其他設(shè)備頻繁開關(guān)機(jī)引起的高頻浪涌電壓。據(jù)某些**機(jī)構(gòu)報(bào)道，一年之中發(fā)生的浪涌電壓超過應(yīng)用電壓一倍以上的次數(shù)就高達(dá)800余次，電壓超1000V以上的就有300余次，這是一個(gè)相當(dāng)大的數(shù)據(jù)，平均每天就有兩次，所以浪涌防護(hù)電路是必不可少的。大功率電源模塊的浪涌測(cè)試標(biāo)準(zhǔn)是參照IEC61000-4-5。該標(biāo)準(zhǔn)適用于電氣和電子設(shè)備在規(guī)定的工作狀態(tài)下工作時(shí)，對(duì)由開關(guān)或雷電作用所產(chǎn)生的有一定危害電平的浪涌電壓的反應(yīng)。該標(biāo)準(zhǔn)不對(duì)絕緣物耐高壓的能力進(jìn)行試驗(yàn)，也不考慮直擊雷。黃浦區(qū)大功率電源模塊廠電話大功率電源模塊結(jié)合了大部分必要的組件，以提供即插即用的解決方案，取代了40多種不同的元器件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南大功率電源模塊供應(yīng)商,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060763231217/4135973.png"></div><p style="text-indent:25px">據(jù)不完全統(tǒng)計(jì)，我國目前有電源生產(chǎn)廠家5000多家，而模塊電源生產(chǎn)廠家約幾百家。但國內(nèi)模塊電源技術(shù)含量不高，市場(chǎng)占有率低，尤其是在中大功率領(lǐng)域，模塊電源效率低，體積大，不能滿足要求。前瞻根據(jù)模塊電源下游需求，2017年模塊電源的需求量約為63.9億元，未來幾年我國模塊電源市場(chǎng)銷售規(guī)模將以12%-18%增長速度發(fā)展。我國有模塊電源生產(chǎn)廠家約幾百家，以私營企業(yè)、小型企業(yè)為主，整體競(jìng)爭(zhēng)力水平較低，行業(yè)集中度較低，市場(chǎng)排名**家廠商的市場(chǎng)占有率不到60%，且多數(shù)是國際品牌，本土品牌較少。尤其在中低端模塊電源產(chǎn)品市場(chǎng)，行業(yè)基本呈現(xiàn)完全競(jìng)爭(zhēng)狀況，而在較好產(chǎn)品市場(chǎng)，由于相應(yīng)的技術(shù)、工藝等的制約，市場(chǎng)集中度較高，市場(chǎng)份額主要被**的國際跨國公司占領(lǐng)。</p><p style="text-indent:25px">一般在不同的使用領(lǐng)域，對(duì)大功率電源模塊的工作溫度范圍要求各異：高低溫測(cè)試是用來確定產(chǎn)品在低溫、高溫兩個(gè)極端氣候環(huán)境條件下的適應(yīng)性和一致性，檢查設(shè)計(jì)余量是否足夠。因?yàn)樵骷奶匦栽诘蜏?、高溫的條件下會(huì)發(fā)生一定的變化，性能參數(shù)具有溫度漂移特性。所以往往很多電源模塊在常溫測(cè)試通過，一旦拿到高低溫環(huán)境測(cè)試就發(fā)現(xiàn)工作不正常或者性能參數(shù)明顯下降。同時(shí)通過長時(shí)間高溫老化可以使元器件的缺陷、焊接和裝配等生產(chǎn)過程中存在的隱患提前暴露出來。對(duì)于大功率電源模塊的應(yīng)力設(shè)計(jì)，重點(diǎn)關(guān)注場(chǎng)效應(yīng)管(MOS管)、二極管、變壓器、功率電感、電解電容、限流電阻等。保證全電壓范圍內(nèi)在穩(wěn)態(tài)、瞬態(tài)、短路等各種極限條件下都能有足夠的降額，以保障產(chǎn)品的可靠性。大功率電源模塊噪聲隔離：（模擬電路與數(shù)字電路隔離、強(qiáng)弱信號(hào)隔離）。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南大功率電源模塊供應(yīng)商,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060608619787/3503048.png"></div><p style="text-indent:25px">大功率電源模塊熱設(shè)計(jì)的基本任務(wù)是：通過熱設(shè)計(jì)在滿足性能要求的前提下盡可能減少模塊內(nèi)部產(chǎn)生的熱量，減少熱阻，選擇合理的冷卻方式。發(fā)熱元器件要盡可能使其分散布局。設(shè)計(jì)PCB板時(shí)要保證印制線的載流容量，印制線的寬度必須適于電流的傳導(dǎo)。對(duì)于大功率的貼片元器件，可以采用大面積敷銅箔的方式，以加大PCB的散熱面積。電源模塊內(nèi)部可通過填充導(dǎo)熱硅膠和樹脂等來降低模塊內(nèi)部元器件的溫升。對(duì)于體積較大的電源模塊，可以使用散熱片進(jìn)行散熱，增加對(duì)流和輻射的表面積從而有效地改善了電子器件的散熱效果。電磁兼容容易造成輸入電壓高，如雷擊浪涌、群脈沖。河南大功率電源模塊供應(yīng)商</p><p style="text-indent:25px">大功率電源模塊包括通電測(cè)試，以便剔除不合規(guī)格的產(chǎn)品。河南大功率電源模塊供應(yīng)商</p><p style="text-indent:25px">有關(guān)統(tǒng)計(jì)數(shù)據(jù)表明，大功率電源模塊在預(yù)期有效時(shí)間內(nèi)失效的主要原因是外部故障條件下?lián)p壞。而正常使用失效的機(jī)率是很低的。因此延長模塊電源壽命、提高系統(tǒng)可靠性的重要一環(huán)是選擇保護(hù)功能完善的產(chǎn)品，即在模塊電源外部電路出現(xiàn)故障時(shí)模塊電源能夠自動(dòng)進(jìn)入保護(hù)狀態(tài)而不至于長久失效，外部故障消失后應(yīng)能自動(dòng)恢復(fù)正常。大功率電源模塊的保護(hù)功能應(yīng)至少包括輸入過壓、欠壓、軟啟動(dòng)保護(hù)；輸出過壓、過流、短路保護(hù)，大功率產(chǎn)品還應(yīng)有過溫保護(hù)等。一般建議實(shí)際使用功率是模塊電源額定功率的30～80%為宜（具體比例大小還與其他因素有關(guān)，后面將會(huì)提到。），這個(gè)功率范圍內(nèi)模塊電源各方面性能發(fā)揮都比較充分而且穩(wěn)定可靠。負(fù)載太輕造成資源浪費(fèi)，太重則對(duì)溫升、可靠性等不利。所有模塊電源均有一定的過載能力，例如某產(chǎn)品可達(dá) 110～120%，但是仍不建議長時(shí)間工作在過載條件下，畢竟這是一種短時(shí)應(yīng)急之計(jì)。河南大功率電源模塊供應(yīng)商</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3144573.html</p></div></div></div></div></div><div id="z7jpwij" class="page-right twoColRt"><div id="hgh8pw8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="kd2bd3r" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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