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clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="q33hj7s" class="twoCol"><div id="kbspheq" class="page-proshow clearfix"><p 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-_yyby/">醫(yī)藥健康</a>?<a href="http://www.cdcfah.com/cp/second-yyby_ylsb/">醫(yī)療設(shè)備</a>?<a href="http://www.cdcfah.com/cp/third-ylsb_qtflpd/">其它未分類</a>?金華X7000冷光源更換高壓包推薦咨詢成都鐳伙醫(yī)修平臺供應(yīng)</p><div id="7nu2qsf" class="leftbox clearfix"><h1>金華X7000冷光源更換高壓包推薦咨詢成都鐳伙醫(yī)修平臺供應(yīng)</h1><div id="2zgi82v" class="proBig"><div id="wgi7j8n" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397543304713845/4419356.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3arya7w" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397543304713845/4419356.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3g7qi2p" 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>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>金華X7000冷光源更換高壓包,X7000</p><p><span>***更新：</span>2021-01-27 05:10:19</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="n7dda8d" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都鐳伙科技有限公司</a></p><p><span>聯(lián)系人：</span>邱鋒</p><p><span>郵箱: </span>cdleihuokeji@163.com</p><p><span>電話: </span>13982269628</p><p><span>傳真: </span>028_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>028-8444323</p><p><span>地址: </span>新都區(qū)踏水路創(chuàng)想大廈2單元2606</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="yhovc9c" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="febt29t" class="box"><p><p> 肖特基二極管和快恢復(fù)二極管的對比區(qū)別快恢復(fù)二極管是指反向恢復(fù)時間很短的二極管（5us以下），工藝上多采用摻金措施，結(jié)構(gòu)上有采用PN結(jié)型結(jié)構(gòu)，有的采用改進(jìn)的PIN結(jié)構(gòu)。其正向壓降高于普通二極管（1-2V），反向耐壓多在1200V以下。從性能上可分為快恢復(fù)和超快恢復(fù)兩個等級。前者反向恢復(fù)時間為數(shù)百納秒或更長，后者則在100納秒以下。肖特基二極管是以金屬和半導(dǎo)體接觸形成的勢壘為基礎(chǔ)的二極管，簡稱肖特基二極管(SchottkyBarrierDiode），具有正向壓降低（）（用這個方法可以判斷出該器件）、反向恢復(fù)時間很短（10-40納秒），金華X7000冷光源更換高壓包，而且反向漏電流較大，耐壓低，一般低于150V，金華X7000冷光源更換高壓包，多用于低電壓場合。這兩種管子通常用于開關(guān)電源。肖特基二極管和快恢復(fù)二極管區(qū)別：前者的恢復(fù)時間比后者小一百倍左右，前者的反向恢復(fù)時間大約為幾納秒。前者的優(yōu)點還有低功耗，金華X7000冷光源更換高壓包，大電流，超高速。快恢復(fù)二極管在制造工藝上采用摻金,單純的擴散等工藝,可獲得較高的開關(guān)速度,同時也能得到較高的耐壓.目前快恢復(fù)二極管主要應(yīng)用在逆變電源中做整流元件.肖特基二極管：反向耐壓值較低40V-50V，通態(tài)壓降，小于10nS的反向恢復(fù)時間。它是具有肖特基特性的“金屬半導(dǎo)體結(jié)”的二極管。其正向起始電壓較低。若仍不能解決問題，則根據(jù)故障分析法結(jié)合測量在可疑電路部分用示波器觀察干擾或噪音波形是否是工頻干擾。金華X7000冷光源更換高壓包</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華X7000冷光源更換高壓包,X7000" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397543304713845/4419356.png"></div><p> 不談很特殊的情況。反激的有點成本低，調(diào)試容易（相對于半橋，全橋），主要是磁芯單向勵磁，功率由局限性，效率也不高，主要是硬開關(guān)，漏感大等等原因。全電壓范圍（85V-264V）效率一般在80%以下，單電壓達(dá)到80%很容易。正激特點：功率適中，可做中小功率，功率一般在200W以下，當(dāng)然可以做很大功率，只是不常常這么做，原因是正激和反激一樣單向勵磁，做大功率磁芯體積要求大，當(dāng)然采用2個變壓器串并聯(lián)的也有，注意只談一般情形，不誤導(dǎo)新人。正激有點，成本適中，當(dāng)然比反激高，優(yōu)點效率比反激高，尤其采用有源箝位做原邊吸收，將漏感能量重新利用。半橋：目前比較火的是LLC諧振半橋，中小功率，大功率通吃型。（一般大于100W小于3KW）。特點成本比反激正激高，因為多用了1個MOS管（雙向勵磁）和1個整流管，控制IC也貴，環(huán)路設(shè)計業(yè)復(fù)雜（一般采用運放，尤其還要做電流環(huán)）。優(yōu)點:采用軟開關(guān)，EMC好，效率極高，比正激高，我做過960WLLC,效率可達(dá)96%以上（全電壓）（當(dāng)然PFC是采用無橋方式）。其它半橋我不推薦，至少我不會去用，比較老的不對稱橋，很難做到軟開關(guān)，LLC成熟以前用的多，現(xiàn)在很少用，至少艾默生等大公司都傾向于LLC，跟著主流走一般都不會錯。金華X7000冷光源更換高壓包運用換板法時，至少要確認(rèn)故障儀器電源無故障，以免將好板損壞。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華X7000冷光源更換高壓包,X7000" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397543307780184/9938678.png"></div><p> 解決這一問題已是迫在眉睫。而影響電源EMC超標(biāo)的主要原因就是：輸入濾波電路的設(shè)計不合理。到目前為止，還沒有介紹電源輸入濾波電路設(shè)計方法的報道。本文首先對電源輸入濾波電路設(shè)計方法進(jìn)行全部、詳細(xì)的討論，提出了一套簡單實用的濾波電路，并應(yīng)用到我司的電源產(chǎn)品中。給出的測試結(jié)果和理論分析證明了該設(shè)計方法的實用性和可行性。輸入濾波電路的拓?fù)浣Y(jié)構(gòu)優(yōu)化設(shè)計輸入電路中主要包含五個元件：共模、差模電感，X、Y電容，放電電阻。輸入濾波電路的設(shè)計，事實上就是將這些元件如何進(jìn)行組合的問題，但在進(jìn)行組合時必須遵循一定的原則。1、對輸入濾波電路的要求1．1雙向濾波功能。對電網(wǎng)開關(guān)整流器及開關(guān)整流器電網(wǎng)的干擾信號均有很好的濾波效果。1．2能控制共模和差模干擾。能控制相線與相線、相線與中線之間的差模干擾及相線、中線與大地之間的共模干擾。工程設(shè)計中重點考慮共模干擾的控制。為了控制差模和共模干擾，通常的在濾波電路中同時包含有差模和共模電感，但基于以下原因差模電感可去掉：（1）共模干擾的影響更大，而差模干擾的影響要小得多。一方面同樣程度的共模和差模干擾，共模干擾所產(chǎn)生的電磁場輻射高出差模34個量級；另一方面。</p><p> 可在磁芯上墊一種類似橡膠的軟材料，以減小應(yīng)力。輸入濾波電路印板設(shè)計印板的布線設(shè)計與濾波器所使用的元器件（如：X、Y電容，共模電感和放電電阻等）的布置有關(guān)，在進(jìn)行設(shè)計時需考慮以下幾方面的問題：（1）濾波器的輸入輸出線要分開，好分別從印板的兩邊引出，以免相互耦合或形成環(huán)路，而且引線要盡可能短。（2）元器件布置要合理，引腳或引線盡可能短而粗。每個元器件的輸入或輸出必須嚴(yán)格分開，分別從兩側(cè)引出，如果從兩側(cè)引出受到限制，輸入輸出線的夾角也不能低于90度。電容的管腳間距與焊盤間距應(yīng)嚴(yán)格相等。（3）由于流過濾波器電流較大，印板上的線條較寬，走線好采用網(wǎng)格的形式，這樣可減少輻射干擾。（4）地線盡可能寬，如有可能，可使地線布滿所有的剩余空間，當(dāng)然，布線也應(yīng)采用柵格的形式。（5）輸入濾波電路部分與其它部分（如輸入端子等）相連時，盡可能采用接插件方式進(jìn)行連接。輸入濾波電路的屏蔽和接地1、輸入電路應(yīng)用屏蔽盒屏蔽起來一方面，當(dāng)諧波通過輸入電路或輸入電路產(chǎn)生振蕩時，將會在周圍空間產(chǎn)生電磁場；另一方面，當(dāng)輸入電路置身于電磁場環(huán)境中時，也容易受干擾。因此，輸入電路好用導(dǎo)電、導(dǎo)磁性能良好的金屬盒屏蔽起來。接線或連接電纜有斷線。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="金華X7000冷光源更換高壓包,X7000" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637397543303463759/5058174.png"></div><p> 摘要為了提高電網(wǎng)的功率因數(shù)，減少干擾，平板電視的大多數(shù)電源都采用了有源PFC電路，盡管電路的具體形式繁多，不盡相同，工作模式也不一樣(CCM電流連續(xù)型、DCM不連續(xù)型、BCM臨界型），但基本的結(jié)構(gòu)大同小異，都是采用BOOST升壓拓?fù)浣Y(jié)構(gòu)。如下圖所示，這是一典型的升壓開關(guān)電源，基本的思想就是把整流電路和大濾波電容分割，通過控制PFC開-關(guān)管的導(dǎo)通使輸入電流能追蹤輸入電壓的變化，獲得理想的功率因數(shù)，減少電磁干擾EMI和穩(wěn)定開關(guān)電源中開關(guān)管的工作電壓。下圖是一個廣泛應(yīng)用的升壓型開關(guān)電源拓?fù)?，相信大家并不陌生。在這個電路中，PFC電感L在MOS開關(guān)管Q導(dǎo)通時儲存能量，在開關(guān)管截止時，電感L上感應(yīng)出右正左負(fù)的電壓，將導(dǎo)通時儲存的能量通過升壓二極管D1對大的濾波電容充電，輸出能量。Boost升壓PFC電感L上都并連著一個二極管D2。觀點眾說紛紜關(guān)于這個二極管的作用，在電源工程師中有一些不同的看法，摘錄如下：說法一：減少浪涌電壓對電容的沖擊在開機瞬間限制PFC電感L因浪涌電流產(chǎn)生巨大的自感電勢，從而造成電路故障。每次電源開關(guān)接通瞬間加到電感上的可以是交流正弦波的任意瞬時值，如果在電源開關(guān)接通的瞬間是在正弦波的大值峰點附近。重新連接連線及緊固連接螺絲等。金華X7000冷光源更換高壓包</p><p style="text-indent:25px">加注入信號或電路上人為短路需綜合考慮，不能超過允許范圍，以免損壞元器件。金華X7000冷光源更換高壓包</p><p style="text-indent:25px">隨著儀器儀表和計算機的完美結(jié)合，為了更好的滿足人們對精神世界的需求，體驗多維世界給人們帶來的**，儀器儀表的虛擬化開始發(fā)展。身臨其境接受客觀實物，給美又增添了一絲創(chuàng)意。我國現(xiàn)有有限責(zé)任公司企業(yè)數(shù)千多家，已經(jīng)形成門類品種比較齊全，具有一定技術(shù)基礎(chǔ)和生產(chǎn)規(guī)模的產(chǎn)業(yè)體系。但同時業(yè)內(nèi)行家也指出，雖然我國測試儀器產(chǎn)業(yè)有了一定的發(fā)展，但遠(yuǎn)遠(yuǎn)不能滿足國民經(jīng)濟各行各業(yè)日益增長的迫切需求。隨著手機移動網(wǎng)絡(luò)的消費潛力不斷隱現(xiàn)，消費者利用手機消費的頻率和份額逐年遞增。移動互聯(lián)網(wǎng)所隱藏的商業(yè)價值被更多地挖掘出來之后，各種傳統(tǒng)行業(yè)（包括內(nèi)窺鏡以及維修周邊，動力系統(tǒng)及手柄附件維修，攝像系統(tǒng)主機及攝像頭維修，手術(shù)器械類維修行業(yè)）的移動網(wǎng)上平臺相繼誕生。為迎接服務(wù)型百年未有之大變局，行家認(rèn)為，要重新定義中國在世界經(jīng)濟版圖中的地位，要順應(yīng)形勢實現(xiàn)制造升級。以華立集團(tuán)在境外開發(fā)“中國工業(yè)園”的成功案例來闡述，跨國經(jīng)營要成為企業(yè)主動的戰(zhàn)略選擇，在不確定性中更好地活下去，以全球化視野看問題，很多困惑在全球化過程中會迎刃而解。金華X7000冷光源更換高壓包</p><p style="text-indent:25px">成都鐳伙科技有限公司致力于儀器儀表，是一家服務(wù)型公司。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個細(xì)節(jié)，公司旗下內(nèi)窺鏡以及維修周邊，動力系統(tǒng)及手柄附件維修，攝像系統(tǒng)主機及攝像頭維修，手術(shù)器械類維修深受客戶的喜愛。公司從事儀器儀表多年，有著創(chuàng)新的設(shè)計、強大的技術(shù)，還有一批**的專業(yè)化的隊伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。在社會各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務(wù)體驗，為客戶成功提供堅實有力的支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3029933.html</p></div></div></div></div></div><div id="ds3hetf" class="page-right twoColRt"><div id="imovclc" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="vkceg88" 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="fe24cpc" class="recomPic likePro"><a 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