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class="proBig"><div id="iaxtqse" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/szmdjd/637393089672621857/8945684.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="d8q3wi3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/szmdjd/637393089672621857/8945684.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="tw7gnnz" 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)品關鍵詞：</span>陜西德國R&S羅德與施瓦茨直流電源可調(diào),直流電源</p><p><span>***更新：</span>2020-11-09 08:23:58</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="uda7k74" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市茂迪機電設備有限公司</a></p><p><span>聯(lián)系人：</span>黃富強</p><p><span>郵箱: </span>fuqiang.huang@maodi.net</p><p><span>電話: </span>13509625980</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span>http://www.maodi.net</p><p><span>手機: </span>0755-83280136</p><p><span>地址: </span>深南大道6006號華豐大廈2803、2804</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="nqxeqh3" class="page-proshow02"><p class="title">詳細說明</p><div id="jciuvri" class="box"><p><p> 可編程直流電源，在航天航空領域主要用于DC-DC電源模塊、蓄電池、飛行模擬器等直流用電設備的測試?？煽啃詼y試用電設備的可靠性測試通常包括電壓跌落測試、溫升測試、ON/OFF測試、老化測試等。而對于航天航空用電設備來說，陜西德國R&S羅德與施瓦茨直流電源可調(diào)，陜西德國R&S羅德與施瓦茨直流電源可調(diào)，要進行比常規(guī)更為嚴苛的測試，要求用電設備不僅能在正常供電情況下穩(wěn)定工作，還要能應付供電異常的狀況。 </p> <p> <br /> </p> <p> 例如：在飛機上，供電系統(tǒng)給各種各樣的直流用電設備供電，而飛機上的供電系統(tǒng)有時會存在過壓或欠壓的狀況，保證用電設備在這些異常情況下正常工作，就是對飛機功能性以及安全性的保證。因此，過欠壓測試必不可少。直流電源在該測試中用以模擬供電系統(tǒng)，通過輸出一個連續(xù)的電壓變化波形來模擬飛機供電系統(tǒng)的電壓變化，對用電設備進行供電，陜西德國R&S羅德與施瓦茨直流電源可調(diào)，測試用電設備是否會在過壓、欠壓、正常電壓這三種不同的電壓狀態(tài)下都能保持正常工作。圖1是在對飛機上的用電設備做過欠壓測試時利用直流電源模擬飛機供電系統(tǒng)輸出的電壓波形：大功率直流電源模塊。陜西德國R&S羅德與施瓦茨直流電源可調(diào)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="陜西德國R&S羅德與施瓦茨直流電源可調(diào),直流電源" src="https://tyunfile.71360.com/UploadFile/szmdjd/637393089672621857/8945684.png"></div><p> 開關電源是指先將交流電源整流濾波成直流電源,用通過電路控制開關管進行高速的道通與截止,將直流電轉化為高頻率的交流電提供給變壓器進行變壓,從而產(chǎn)生所需要的一組或多組電壓輸出負載的電氣產(chǎn)品. 轉化為高頻交流電的原因是高頻交流在變壓器變壓電路中的效率要比50Hz高很多,所以開關變壓器可以做的很小,而且工作時不是很熱.成本很低.如果不將50Hz變?yōu)楦哳l那開關電源就沒有意義 </p> <p> 開關電源的工作原理是: </p> <p> 1.交流電源輸入經(jīng)整流濾波成直流電源; </p> <p> 2.通過高頻PWM(脈沖寬度調(diào)制)信號控制開關管,將直流加到開關變壓器初級上; </p> <p> 3.開關變壓器次級感應出高頻電壓,經(jīng)整流濾波供給負載; </p> <p> 4.輸出部分通過一定的電路反饋給控制電路,控制PWM占空比,以達到穩(wěn)定輸出的目的. </p> <p> 開關電源電路: 貴州固緯直流電源價格多少常用的可控直流電源有哪幾種。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="陜西德國R&S羅德與施瓦茨直流電源可調(diào),直流電源" src="https://tyunfile.71360.com/UploadFile/szmdjd/637393089710961437/7545899.png"></div><p> 簡單的極性保護 </p> <p> 3 程序保護 </p> <p> 直流電源模塊穩(wěn)壓電源的電路比較復雜，基本上可以分為小功率控制部分和大功率開關部分。開關管則屬大功率器件，為保護開關管在開啟或關斷電源時的安全，必須先讓調(diào)制器、放大器等小功率控制電路工作。所以，必須保證正確的開機程序。開關穩(wěn)壓器的輸入端，一般接有小電感、大電容的輸入濾波器，在開機瞬間，濾波電容器會流過很大的浪涌電流，這個浪涌電流可高出正常輸入電流的數(shù)倍，這樣大的浪涌電流會使普通電源開關的觸點或繼電器的觸點熔化，并使輸入保險絲熔斷，甚至會損害電容器。為此，開機時應該接入一個限流電阻，通過這個限流電阻對電容器充電。為了不使該限流電阻消耗過多的功率，在開機暫態(tài)過程結束后，用一個繼電器自動短接，使直流電源直接對開關穩(wěn)壓器供電，如圖2所示。這種電路稱之謂開關穩(wěn)壓器的“軟啟動”電路。 </p><p> （一）電源：用萬用表測一下主電路開關（接觸器）和控制保險絲后面是否有電，這將排除這些元件斷路的可能性。 </p> <p> （二）整流器：整流器采用三相全控橋式整流電路，它包括六個快速熔斷器、六個晶閘管、六個脈沖變壓器和一個續(xù)流二極管。在快速熔斷器上有一個紅色的指示器，正常時指示器縮在外殼里邊，當快熔燒斷后它將彈出，有些快熔的指示器較緊，當快熔燒斷后，它會卡在里面，所以為可靠起見，可以用萬用表通斷檔測一下快熔，以判斷它是否燒斷。 </p> <p> 測量晶閘管的簡單方法是用萬用表電阻擋（200Ω擋）測一下其陰極—陽極、門極—陰極電阻，測量時晶閘管不用取下來。正常情況下，陽極—陰極間電阻應為無窮大，門極—陰極電阻應在10—50Ω之間，過大或過小都表明這只晶閘管門極失效，它將不能被觸發(fā)導通。 </p> <p> 脈沖變壓器次邊接在晶閘管上，原邊接在主控板上，用萬用表測量原邊電阻約為50Ω。續(xù)流二極管一般不容易出現(xiàn)故障，檢查時用萬用表二極管擋測其二端，正向時萬用表顯示結壓降約有500mV，反向不通。 </p> <p> （三）逆變器：逆變器包括四只快速晶閘管和四只脈沖變壓器，可以按上述方法檢查。 </p> <p> <br /> 雙路輸出可調(diào)直流電源。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="陜西德國R&S羅德與施瓦茨直流電源可調(diào),直流電源" src="https://tyunfile.71360.com/UploadFile/szmdjd/637393089567182490/9055356.png"></div><p> 高美測儀可編程直流電源超前技術保證**高效率 </p> <p> 菜單提示操作和導航鍵大幅簡化了參數(shù)設H和手動編程。常用的設置菜單可通過功能鍵直接調(diào)出。設置模式和顯示能清楚地區(qū)分開來.輸出電流和電壓值可通過旋鈕進行調(diào)整.旋轉編碼器的有效分辨率可通過導航鍵預選。此外還可通過數(shù)字小鍵盤快速輸入電壓和電連設定值。用戶可保存?zhèn)€性化的電源參數(shù)配罝。并在需要時檢索調(diào)出。在需要進行多次重復測試的情況下，可節(jié)省大量參數(shù)設置時間.電源的時序控制功能支持自動運行測試。不需要與PC連接.可非常方便地為被測設備提供長期測試所需要的可變負載。德國高美測儀直流電源。江蘇直流電源</p><p style="text-indent:25px">雙通道可編程直流電源。陜西德國R&S羅德與施瓦茨直流電源可調(diào)</p><p style="text-indent:25px">國統(tǒng)局數(shù)據(jù)顯示，2019年上半年儀器儀表大行業(yè)規(guī)模以上企業(yè)4927個，營收規(guī)模4002億元，營收同比增長7.57%；收入總額為361億元，同比增長2.87%，比主營收入低4.70個百分點；中國的新型工業(yè)化進程，信息化和工業(yè)化融合的進一步加深，帶動各個工業(yè)領域對于電能質(zhì)量分析儀，功率分析儀，亮度計，色差儀等產(chǎn)品的需求。在國民經(jīng)濟運行中，一般經(jīng)營項目是：儀器儀表、通訊器材、機械設備、五金工具的購銷、技術維護、信息咨詢；國內(nèi)貿(mào)易；貨物與技術的進出口業(yè)務。（法律、行政法規(guī)、國**決定禁止的項目除外，限制的項目須取得許可后方可經(jīng)營），許可經(jīng)營項目是：儀器儀表、通訊器材、機械設備、五金工具的安裝、維修。等設備是提高勞動生產(chǎn)率的倍增器，對國民經(jīng)濟有著巨大的作用和影響力。美國商業(yè)部地區(qū)技術和標準研究院（NIST）提出的報告稱：美國90年代儀器儀表工業(yè)產(chǎn)值只占工業(yè)總產(chǎn)值的4%，但它對國民經(jīng)濟（GNP）的影響面卻達到66%。儀器儀表在工業(yè)發(fā)展中具有重要作用，這也使得儀器儀表得到快讀發(fā)展。各行各業(yè)對儀器儀表的市場需求也在不斷提升，貿(mào)易企業(yè)正在發(fā)展中尋求技術創(chuàng)新和質(zhì)量提升。儀器儀表的質(zhì)量、性能關系到工業(yè)安全，必須重視。陜西德國R&S羅德與施瓦茨直流電源可調(diào)</p><p style="text-indent:25px">深圳市茂迪機電設備有限公司發(fā)展規(guī)模團隊不斷壯大，現(xiàn)有一支專業(yè)技術團隊，各種專業(yè)設備齊全。在茂迪近多年發(fā)展歷史，公司旗下現(xiàn)有品牌德國GMC-I高美測儀,柯尼卡美能達,雷云光電,TESCOM等。我公司擁有強大的技術實力，多年來一直專注于一般經(jīng)營項目是：儀器儀表、通訊器材、機械設備、五金工具的購銷、技術維護、信息咨詢；國內(nèi)貿(mào)易；貨物與技術的進出口業(yè)務。（法律、行政法規(guī)、國**決定禁止的項目除外，限制的項目須取得許可后方可經(jīng)營），許可經(jīng)營項目是：儀器儀表、通訊器材、機械設備、五金工具的安裝、維修。的發(fā)展和創(chuàng)新，打造高指標產(chǎn)品和服務。茂迪始終以質(zhì)量為發(fā)展，把顧客的滿意作為公司發(fā)展的動力，致力于為顧客帶來***的電能質(zhì)量分析儀，功率分析儀，亮度計，色差儀。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1915784.html</p></div></div></div></div></div><div id="p7h9fri" class="page-right twoColRt"><div id="poartkr" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="xmtf2nt" 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" class="vcenter" 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