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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="utqikry" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060385120850/9021330.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="bqxz2mt" 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>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>金山區(qū)大功率電源模塊費用,大功率電源模塊</p><p><span>***更新：</span>2021-01-30 02:14:09</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="aumelsj" 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: </span>021-69585559</p><p><span>地址: </span>上海市嘉定區(qū)科福路358號4號樓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="bvs2e23" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="hvn2o9m" class="box"><p><p style="text-indent:25px">大致上大功率電源可分為線性電源和開關(guān)電源兩類。線性電源主要包括工頻變壓器、大功率整流回路、輸出整流濾波器、控制電路、保護(hù)電路等。它是先將交流電經(jīng)過變壓器變壓，再經(jīng)過整流電路整流濾波得到直流電壓，再經(jīng)過電壓反饋調(diào)整輸出電壓，就得到高精度的直流電壓。開關(guān)電源是通過電子技術(shù)實現(xiàn)的。先是把電網(wǎng)輸入交流整流成直流，通過逆變器高頻PWM(脈沖寬度調(diào)制)信號控制開關(guān)管，輸出鋸齒狀的高頻交流電壓并加到開關(guān)變壓器初級上，開關(guān)變壓器次級感應(yīng)出高頻電壓,經(jīng)整流濾波供給負(fù)載需要的直流電壓，金山區(qū)大功率電源模塊費用，同時還防止高頻噪聲對負(fù)載的干擾。輸出部分通過一定的電路反饋給控制電路，控制PWM占空比，金山區(qū)大功率電源模塊費用,以達(dá)到穩(wěn)定輸出的目的。電源模塊體積越大，金山區(qū)大功率電源模塊費用，散熱特性越高，工作溫度越低。金山區(qū)大功率電源模塊費用</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金山區(qū)大功率電源模塊費用,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060385120850/9021330.png"></div><p style="text-indent:25px">大功率電源模塊有以下多個優(yōu)點：每一模塊可以分別加以嚴(yán)格測試，以確保其高度可靠，其中包括通電測試，以便剔除不合規(guī)格的產(chǎn)品。相較之下，集成式的解決方案便較難測試，因為整個供電系統(tǒng)與電路上的其他功能系統(tǒng)緊密聯(lián)系一起。不同的供應(yīng)商可以按照現(xiàn)有的技術(shù)標(biāo)準(zhǔn)設(shè)計同一大小的模塊，為設(shè)計電源供應(yīng)器的工程師提供多種不同的選擇。每一模塊的設(shè)計及測試都按照標(biāo)準(zhǔn)性能的規(guī)定進(jìn)行，有助減少采用新技術(shù)所承受的風(fēng)險。若采用集成式的解決方案，一旦電源供應(yīng)系統(tǒng)出現(xiàn)問題，便需要將整塊主機板更換;若采用模塊式的設(shè)計，只要將問題模塊更換便可，這樣有助節(jié)省成本及開發(fā)時間。崇明區(qū)大功率電源模塊生產(chǎn)工藝功率 P=UI,是輸出電壓和輸出電流的乘積。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金山區(qū)大功率電源模塊費用,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060769491026/1799904.png"></div><p style="text-indent:25px">大功率電源模塊在電壓轉(zhuǎn)換過程中有能量損耗，產(chǎn)生熱能導(dǎo)致模塊發(fā)熱，降低電源的轉(zhuǎn)換效率，影響電源模塊正常工作，但什么情況下會造成大功率電源模塊發(fā)熱較嚴(yán)重呢？負(fù)載過流，超出數(shù)據(jù)手冊應(yīng)用范圍使得內(nèi)部關(guān)鍵器件溫度飆升；環(huán)境溫度過高或散熱不良；其他大發(fā)熱源熱傳遞。使用線性電源時要加散熱片,或選擇效率高的開關(guān)電源；輸出功率更大的模塊，確保有70%~80%的負(fù)載降額；降低環(huán)境溫度，保持散熱良好。噪聲是衡量電源模塊優(yōu)劣的一大關(guān)鍵指標(biāo)，在應(yīng)用電路中，模塊周邊元器件的設(shè)計布局等也會影響輸出噪聲，哪些因素對輸出噪聲有較大影響呢？電源模塊與主電路噪聲敏感元件距離過近；主電路噪聲敏感元件的電源輸入端處未接去耦電容；多路系統(tǒng)中各單路輸出的電源模塊之間產(chǎn)生差頻干擾；地線處理不合理；電源模塊輸入端的噪聲過大，未處理，直接耦合到電源模塊輸出端；</p><p style="text-indent:25px">大功率的電源模塊通常的工作運行過程中，容易出現(xiàn)模塊溫度過高發(fā)熱的情況，因此在研發(fā)過程中能否對散熱性能提供有效保障就成為了擺在研發(fā)部門面前的重要問題之一，選用合適的散熱器也就成為了研發(fā)過程中的重中之重。那么，大功率的電源模塊散熱性能為什么會出現(xiàn)較大的差異？散熱器的選擇對于散熱效果都有哪些影響呢？本文將會就這一問題展開簡要分析，一起來看看這些差異是由哪些問題造成的吧。散熱器翅片長度會造成散熱性能的差異問題。在研發(fā)過程中，適當(dāng)增加散熱器的翅片長度適可以有效減小電源模塊的器件結(jié)溫，但是過分增加翅片長度并不能確保熱量傳導(dǎo)至散熱器翅片的末端，反而使散熱器重量增加太多。一般認(rèn)為，散熱器的翅片程度和基座寬度比例接近1時，傳熱效果較好。大功率電源模塊產(chǎn)品在通訊通信領(lǐng)域的應(yīng)用范圍得到了較大的拓展。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金山區(qū)大功率電源模塊費用,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060799657446/5364070.png"></div><p style="text-indent:25px">在電源的應(yīng)用電路中，會出現(xiàn)大功率電源模塊輸出端電壓不正常，輸出端就是沒有任何輸出，大功率電源模塊也無損壞，是什么原因呢？或許是大功率電源模塊本身就無法啟動？外接電容過大（即容性負(fù)載過大），需要充電的時間變長，有些大功率電源模塊在規(guī)定時間內(nèi)不能建立好輸出電壓，就會進(jìn)入過流保護(hù)，從而模塊無輸出；電子負(fù)載在CC模式下也會造成部分啟動能力弱的大功率電源模塊啟機不良，由于在CC模式下啟機的時候，其模擬的負(fù)載趨近于零，且反應(yīng)調(diào)節(jié)時間相對較長，絕大多數(shù)的大功率電源模塊應(yīng)用的環(huán)境屬于純電阻模式；負(fù)載需要的電流過大，而大功率電源模塊單位輸出的較大平均電流不夠?qū)е履K無法啟動；輸入線路過長，使得線路之間產(chǎn)生的壓降過大，而導(dǎo)致輸入電壓低于模塊輸入電壓的下限要求。大功率電源模塊輸出端負(fù)載過輕，輕于10%的額定負(fù)載造成電壓偏高。崇明區(qū)大功率電源模塊生產(chǎn)工藝</p><p style="text-indent:25px">大功率電源模塊輸出有單路輸出，雙路輸出及多路輸出。金山區(qū)大功率電源模塊費用</p><p style="text-indent:25px">大功率電源模塊要根據(jù)負(fù)載的波動情況來確定，有的負(fù)載較穩(wěn)定，有的負(fù)載就波動較大，甚至于有的還會有空載、或滿載、或瞬間負(fù)載變大、或瞬間負(fù)載跌落的情況發(fā)生，若有這種問題，較好與電源模塊廠家說明，確認(rèn)其設(shè)計上已有必要的應(yīng)對防護(hù)性設(shè)計措施，不是所有的電源都可以達(dá)到這個目標(biāo)的。負(fù)載的類型也是一個影響因素。一般的模塊，其輸出是按照默認(rèn)為阻性負(fù)載而設(shè)計的，如果負(fù)載是感性或容性負(fù)載，都需要與模塊廠家單獨說明，以便廠家出廠時的電源模塊內(nèi)部器件或參數(shù)稍作調(diào)整。金山區(qū)大功率電源模塊費用</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3071515.html</p></div></div></div></div></div><div id="3ovn23o" class="page-right twoColRt"><div id="tiaceln" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="zjg3mgi" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="8qxoqc2" 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