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id="39tcdu9" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725420283124/8321074.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="n3nzvhq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725420283124/8321074.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="y3lxjfy" 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>成都安防**穩(wěn)壓電源批發(fā)價(jià)格,安防</p><p><span>***更新：</span>2021-01-31 02:12:10</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="jmdufq9" 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="kxdfwxw" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="jh72yzd" class="box"><p><p style="text-indent:25px">開關(guān)型線性穩(wěn)壓電源:有一類與變壓器型線性穩(wěn)壓電源不同的線性穩(wěn)壓電源就是開關(guān)型線性穩(wěn)壓電源，它的電路型式主要有單端反激式，單端正激式、半橋式、推挽式和全橋式。它和線性電源的根本區(qū)別在于它變壓器不工作在工頻而是工作在幾十千赫茲到幾兆赫茲。功能管不是工作在飽和及截止區(qū),而是工作在開關(guān)狀態(tài)；開關(guān)電源因此而得名，開關(guān)電源的優(yōu)點(diǎn)是體積小，重量輕，成都安防**穩(wěn)壓電源批發(fā)價(jià)格，成都安防**穩(wěn)壓電源批發(fā)價(jià)格，穩(wěn)定可靠；缺點(diǎn)是相對(duì)于變壓器型線性穩(wěn)壓電源來說紋波較大，一般≤1%VO(P-P)，成都安防**穩(wěn)壓電源批發(fā)價(jià)格,好的可做到幾十mV(P-P)或更小。12V供電距離不可超過100米。成都安防**穩(wěn)壓電源批發(fā)價(jià)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="成都安防**穩(wěn)壓電源批發(fā)價(jià)格,安防" src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725420283124/8321074.png"></div><p style="text-indent:25px">UPS(不間斷電源)的工作原理：在線式UPS電源在市電正常供電時(shí)，它首先將市電交流電源經(jīng)整流變成直流電源，然后進(jìn)行脈寬調(diào)制、濾波、并將直流電源經(jīng)逆變器重新轉(zhuǎn)換成正弦波交流電源向負(fù)載供電，一旦市電中斷，立即改由蓄電池提供的直流經(jīng)逆變器、電脈寬調(diào)制、濾波，向負(fù)載提供正弦波交流電源。因此，對(duì)在線式UPS而言，在正常情況下，無論有無市電，它都是由UPS電源的逆變器對(duì)負(fù)載供電，這樣就避免了所有由市電電網(wǎng)電壓波動(dòng)及而帶來的影響。顯而易見，在線式UPS電源的供電質(zhì)量明顯優(yōu)于后備式UPS電源，因?yàn)樗梢詫?shí)現(xiàn)對(duì)負(fù)載的穩(wěn)頻、穩(wěn)壓供電。而且在由市電轉(zhuǎn)換到蓄電池供電時(shí)，其轉(zhuǎn)換時(shí)間基本為零，真正給用戶提供高質(zhì)量穩(wěn)壓、穩(wěn)頻的純凈正弦波電源，從而提供符合安防監(jiān)控系統(tǒng)需要的電源保護(hù)。在線互動(dòng)式UPS電源結(jié)合了后備式UPS和在線式UPS的許多優(yōu)點(diǎn)，也是一種很不錯(cuò)的變換形式，但是由于它使用的是工頻變壓器，有笨重、體積大的問題存在。成都安防**穩(wěn)壓電源批發(fā)價(jià)格電系統(tǒng)一旦出現(xiàn)問題，將會(huì)導(dǎo)致整個(gè)監(jiān)控系統(tǒng)無法正常工作，陷入癱瘓狀態(tài)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="成都安防**穩(wěn)壓電源批發(fā)價(jià)格,安防" src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725456034827/1056215.png"></div><p style="text-indent:25px">開關(guān)電源和普通的電源有什么區(qū)別：普通的電源一般是線性電源,線性電源，是指調(diào)整管工作在線性狀態(tài)下的電源.而在開關(guān)電源中則不一樣，開關(guān)管（在開關(guān)電源中，我們一般把調(diào)整管叫做開關(guān)管）是工作在開、關(guān)兩種狀態(tài)下的：開——電阻很?。魂P(guān)——電阻很大。開關(guān)電源是一種比較新型的電源。它具有效率高，重量輕，可升、降壓，輸出功率大等優(yōu)點(diǎn)。但是由于電路工作在開關(guān)狀態(tài)，所以噪聲比較大。通過下圖，我們來簡(jiǎn)單的說說降壓型開關(guān)電源的工作原理。如圖所示，電路由開關(guān)K（實(shí)際電路中為三極管或者場(chǎng)效應(yīng)管），續(xù)流二極管D，儲(chǔ)能電感L，濾波電容C等構(gòu)成。當(dāng)開關(guān)閉合時(shí)，電源通過開關(guān)K、電感L給負(fù)載供電，并將部分電能儲(chǔ)存在電感L以及電容C中。</p><p style="text-indent:25px">如何配置安防監(jiān)控系統(tǒng)的UPS電源：UPS電源是為安防監(jiān)控系統(tǒng)提供動(dòng)力的中心部分，是為安防監(jiān)控系統(tǒng)提供持續(xù)、穩(wěn)定、不間斷電力供應(yīng)的重要外部設(shè)備。目前，市場(chǎng)上供應(yīng)的UPS電源設(shè)備種類繁多，輸出功率也有所不同。UPS電源按工作模式可分為后備式、在線式兩大類。按其輸出波形又分為方波輸出和正弦波輸出兩種。以下主要介紹了UPS電源的工作原理，以及如何配置安防監(jiān)控系統(tǒng)的UPS電源。備用電源是安防監(jiān)控系統(tǒng)基本要素之一。缺少備用電源的系統(tǒng)則暗藏致命缺陷，不能投入實(shí)際應(yīng)用當(dāng)中，因?yàn)闃O可能在關(guān)鍵時(shí)刻貽誤戰(zhàn)機(jī)，拋錨停擺，整系統(tǒng)癱瘓，造成無可挽回的損失。周圍環(huán)境的照度是否滿足攝像機(jī)紅外燈開啟的條件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="成都安防**穩(wěn)壓電源批發(fā)價(jià)格,安防" src="https://tyunfile.71360.com/UploadFile/baoyixinneng/637441725445175500/4580146.png"></div><p style="text-indent:25px">監(jiān)控系統(tǒng)中電源安裝及電源線選擇方法：視頻監(jiān)控系統(tǒng)中攝像機(jī)的電源供電是保證監(jiān)控設(shè)備正常可靠運(yùn)行的電源供給。如何合理布置監(jiān)控系統(tǒng)的電源安裝及電源線選擇呢?攝像機(jī)的電源設(shè)置根據(jù)攝像機(jī)是在控制主機(jī)邊上還是比較遠(yuǎn)的距離，如果比較近的就直接在主機(jī)旁邊安裝大功率的直流穩(wěn)壓電源，將多個(gè)攝像機(jī)連接到這個(gè)電源上，直流電源功率的大于攝像機(jī)的功率總和就可以了。如果距離較遠(yuǎn)的應(yīng)該采用220V交流電源分配到攝像機(jī)邊上再通過穩(wěn)壓電源進(jìn)行變壓給攝像機(jī)供電，220V交流電源線應(yīng)與視頻線距離應(yīng)大于30公分，避免磁場(chǎng)干擾，影響圖像傳送質(zhì)量。系統(tǒng)維修的時(shí)候，經(jīng)常需要打開、關(guān)閉電源。蘇州消防24v電源價(jià)格</p><p style="text-indent:25px">集中供電方式是指在監(jiān)控室或某個(gè)中間點(diǎn)采用12V開關(guān)電源向前端負(fù)載集中供電。成都安防**穩(wěn)壓電源批發(fā)價(jià)格</p><p style="text-indent:25px">如何合理配置整個(gè)監(jiān)控系統(tǒng)的攝像機(jī)電源功率：這個(gè)問題經(jīng)常讓年輕沒有經(jīng)驗(yàn)的工程師為難，很多方案在實(shí)施的時(shí)候都發(fā)現(xiàn)當(dāng)初設(shè)計(jì)的電源容量不夠，需要追加設(shè)備，造成和甲方扯皮現(xiàn)象。實(shí)際上，由于攝像機(jī)在啟動(dòng)瞬間，啟動(dòng)電流很大，再加上工程上遠(yuǎn)距離傳輸?shù)膿p耗，所以，監(jiān)控?cái)z像機(jī)需要的電源，不是簡(jiǎn)單地把所有攝像機(jī)的額定功率相加。正確的做法是把整個(gè)監(jiān)控系統(tǒng)的攝像機(jī)的額定功率相加再乘以1.3倍，這個(gè)是攝像機(jī)實(shí)際需要的功率，然后再加上約30%的損耗;較后再加上30%的余量，作為將來擴(kuò)容使用。成都安防**穩(wěn)壓電源批發(fā)價(jià)格</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3086163.html</p></div></div></div></div></div><div id="xa3w3mn" class="page-right twoColRt"><div id="24oarxf" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="u3s3bws" 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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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