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clearfix"><h1>四川節(jié)能LED報(bào)價(jià)表歡迎咨詢上海先盛照明電器供應(yīng)</h1><div id="v9pttxf" class="proBig"><div id="tnhvuyg" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402597856969207/5545199.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="fzdtdbv" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402597856969207/5545199.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="etil2rl" 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>四川節(jié)能LED報(bào)價(jià)表,LED</p><p><span>***更新：</span>2020-12-31 05:09:32</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="6pjtyy8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海先盛照明電器有限公司</a></p><p><span>聯(lián)系人：</span>顧勇軍</p><p><span>郵箱: </span>522366548@qq.com</p><p><span>電話: </span>13301861712</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-54169416</p><p><span>地址: </span>陶干路1199號(hào)</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="j8lj3lo" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="3t19vyr" class="box"><p><p> 現(xiàn)在LED燈具的光效=。疑問(wèn)：不同燈珠廠給出的參數(shù)表格不一致，難以按照以上公式計(jì)算；燈珠模組排列是否會(huì)導(dǎo)致光效衰減？如何知道燈具外殼溫度，推算出Tj溫度？LED燈具光效與LED光效的區(qū)別（精）-百度文庫(kù)在線互動(dòng)式文檔分享平臺(tái)，在這里，您可以和千萬(wàn)網(wǎng)友分享自己手中的文檔，全文閱讀其他用戶的文檔，同時(shí)，也可以利用分享文檔獲取的積分下載文檔wenku./view/LED燈珠的晶片大小與光效LED能承受的電流，取決于：晶片大小，一般用mil（1mil=1/1000inch=)稱呼大小，舉例：SMD2835的三安芯片，一般做做10x30mil或者17x34mil。LED的燈珠使用，需要留有余量，一般需要比額定電流低20%左右。LED燈珠的評(píng)價(jià)一般按光效來(lái)計(jì)算，光通量/功率=光效，越高越貴?，F(xiàn)在的LED光效一般都能達(dá)到100-150lm/W,甚至達(dá)到190lm/W。LED燈珠的光效，其實(shí)是跟驅(qū)動(dòng)電流一定程度上成反比，意思是驅(qū)動(dòng)電流約靠近額定電流，四川節(jié)能LED報(bào)價(jià)表，其實(shí)光效是越低的，四川節(jié)能LED報(bào)價(jià)表。一般燈珠廠標(biāo)注的高光效，都是在比較低的額定電流下測(cè)定的。燈珠色溫，四川節(jié)能LED報(bào)價(jià)表.，相關(guān)色溫ColorTemperature:色溫是照明光學(xué)中用于定義光源顏色的一個(gè)物理量。即把某個(gè)黑體加熱到一個(gè)溫度，其發(fā)射的光的顏色與某個(gè)光源所發(fā)射的光的顏色相同時(shí)。LED，就選上海先盛照明電器有限公司，讓您滿意，有想法可以來(lái)我司咨詢！四川節(jié)能LED報(bào)價(jià)表</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川節(jié)能LED報(bào)價(jià)表,LED" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402597856969207/5545199.png"></div><p>LED路燈與常規(guī)路燈不同的是，LED光源采用低壓直流供電、由GaN基功率型藍(lán)光LED與黃色合成的高效白光，LED路燈是指用LED燈具制作的路燈，具有高效、安全、節(jié)能、環(huán)保、壽命長(zhǎng)、響zhi應(yīng)速度快、顯色指數(shù)高等優(yōu)點(diǎn)，對(duì)城市節(jié)能照明具有十分重要的意義。優(yōu)點(diǎn)1、LED路燈本身的特性——光的單向性，沒(méi)有光的漫射，可以很好的保證光照效率。LED體積小，重量輕，采用環(huán)氧樹脂封裝，不*可以保護(hù)內(nèi)部芯片，還具有聚光透光的能力，其使用壽命大多在50000-100000小時(shí)之間。2、獨(dú)特的二次光學(xué)設(shè)計(jì)，將光照射到所需照明的區(qū)域，進(jìn)一步提高了光照效率，以達(dá)到節(jié)能目的。3、LED的已達(dá)110-130lm/W，很大的發(fā)展空間，理論值達(dá)360lm/W。高壓鈉燈的發(fā)光效率是隨功率增加才會(huì)有所增加，總體光效LED路燈比高壓鈉燈強(qiáng)；(這個(gè)總體光效是理論上的，實(shí)際上250W以上高壓鈉燈的光效高于LED燈）。4、LED路燈的光顯色性比高壓鈉燈高許多，高壓鈉燈顯色指數(shù)只有23左右，而LED路燈顯色指數(shù)達(dá)到75以上，從視覺(jué)心理角度考慮，達(dá)到同等亮度。5、光衰小，一年的光衰不到3%，使用10年仍達(dá)到道路要求，而高壓鈉燈光衰大，一年左右已經(jīng)下降30%以上，因此，LED路燈在使用功率的設(shè)計(jì)上可以比高壓鈉燈低。重慶大功率LED射燈上海先盛照明電器有限公司LED獲得眾多用戶的認(rèn)可。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川節(jié)能LED報(bào)價(jià)表,LED" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402596032623473/7450815.png"></div><p style="text-indent:25px">由于開關(guān)工作頻率剛好大于諧振頻率，所以可以降低無(wú)功功率和提高電路工作效率。由于開關(guān)工作頻率固定，所以可以比較方便地確定燈負(fù)載匹配電路中無(wú)源器件的參數(shù)?？稍谳^寬的燈功率范圍內(nèi)（5%~100%）保持ZVS工作條件。在很低的半橋逆變器供電電壓下，電子鎮(zhèn)流器電路將會(huì)失去較開關(guān)特性，會(huì)出現(xiàn)鎮(zhèn)流電感電流不連續(xù)的工作狀態(tài)。然而在直流供電電壓很低的情況下，這種工作狀態(tài)不再是個(gè)問(wèn)題，這時(shí)功率開關(guān)管的電應(yīng)力和損耗都將很小，即使工作在硬開關(guān)，在低直流供電電壓情況下（如20V）也不會(huì)產(chǎn)生太多的EMI輻射。<span style="display:none;"><span style="display:none;"></span></span></p><p> 這個(gè)黑體加熱的溫度稱之為該光源的顏色溫度，簡(jiǎn)稱色溫。其單位用“K”開爾文表示。CorrelatedColorTemperature:但實(shí)際上，絕大多數(shù)照明光源的光色并不能恰好在黑體輻射線上，于是RaymondDavis等人提出了相關(guān)色溫的概念，其思想是在均勻色品圖上用距離短的溫度來(lái)表示光源的相關(guān)色溫，用K氏溫度表示。CIE1931色度圖相關(guān)色溫，以及u,v坐標(biāo)，x,y坐標(biāo)對(duì)比：明白相關(guān)色溫的概念，色溫可以用積分球測(cè)定，以及可以知道坐標(biāo)，SDCM，CRI，光通量等，機(jī)器如下：色容差SDCM同樣的相關(guān)色溫，坐標(biāo)不同，給人的感覺(jué)是完全不同的，如：同樣是3000K相關(guān)色溫的兩個(gè)LED燈珠色容差：表征光色電檢測(cè)系統(tǒng)軟件計(jì)算的X，Y值（uv)與標(biāo)準(zhǔn)光源之間的差別，數(shù)值越小，準(zhǔn)確度越高，光的顏色就越**。圈圈可以理解為步長(zhǎng)（step)，分7步，5步，3步，2步，1步。CREE燈珠一般出廠都在4步以內(nèi)；我們現(xiàn)在的SMD2835燈珠，一般都在5步以內(nèi)，一般為2-3步不等；色漂，隨著電流不同，溫度或者時(shí)間不同，色溫出線飄逸的現(xiàn)象。越小越好。光品質(zhì)：色容差與色溫的關(guān)系，你真的懂？光品質(zhì)：色容差與色溫的關(guān)系，你真的懂？/content/17/0720/09/27356145_tml燈珠電壓以上圖表燈珠電壓都是按3V的倍數(shù)計(jì)算。上海先盛照明電器有限公司是一家專業(yè)提供LED的公司，期待您的光臨！</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川節(jié)能LED報(bào)價(jià)表,LED" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402595791627408/1170035.png"></div><p>上海先盛照明電器有限公司供應(yīng)ledLED燈珠）研發(fā)、生產(chǎn)和銷售?？深A(yù)約工程師提供燈珠快速選型服務(wù)，**提供樣品測(cè)試，有效解決您的選型難題！客服咨詢QQ:選型推薦：2835燈珠，2835多少w，2835燈珠好還是5730好？led燈珠有幾種顏色？表貼和直插燈珠的區(qū)別是什么？如何選擇led燈珠，怎么選擇led燈珠，高亮度led燈珠led燈珠規(guī)格型號(hào)，led燈珠規(guī)格型號(hào)參數(shù)？led燈珠多少伏，，照明燈珠多少伏貼片led燈珠型號(hào)對(duì)照表，貼片led燈珠型號(hào)參數(shù)LED燈珠壞了怎么修,led燈不亮了怎么修?發(fā)光二極管，發(fā)光二極管電壓是多少？發(fā)光二極管耐壓多少伏?白色發(fā)光二極管耐壓多少伏？貼片led燈珠，led燈珠型號(hào)規(guī)格，廠家怎么區(qū)分？led燈珠一個(gè)是多少瓦，led貼片怎么看瓦數(shù)?led燈珠有哪些型號(hào)，大功率led燈珠有哪些型號(hào)？led燈珠價(jià)格，3014led燈珠價(jià)格，大功率led價(jià)格表紅外發(fā)光二極管，紅外發(fā)光二極管參數(shù)有哪些？7030燈珠，7030燈珠電壓多少？7030燈珠多少瓦?7020燈珠，7020燈珠參數(shù)，7020燈珠功率多少瓦？大功率燈珠，大功率燈珠參數(shù)，大功率燈珠種類？5050燈珠，5050燈珠電壓電流，5050燈珠是多少瓦？led燈珠型號(hào)對(duì)照表，貼片led燈珠型號(hào)對(duì)照表如何判斷哪個(gè)燈珠壞了，怎樣維修led燈珠？3535燈珠。LED，就選上海先盛照明電器有限公司，讓您滿意，期待您的光臨！四川節(jié)能LED報(bào)價(jià)表</p><p style="text-indent:25px">LED，就選上海先盛照明電器有限公司，用戶的信賴之選，歡迎您的來(lái)電哦！四川節(jié)能LED報(bào)價(jià)表</p><p> 而LED基板與PCB之間的熱阻一般是℃/w（鋁基板的熱阻一般小于℃/w),那么Tj與PCB板之間溫差為8+℃。燈具散熱材料，一般壓鑄鋁（鋁合金的熱阻一般*為℃/w)，那么燈殼到LEDPN結(jié)之間的溫差約為：（8+）=℃?，F(xiàn)在問(wèn)題是：燈殼Tscase與燈周邊環(huán)境溫度Ta的溫度差多少？這是由燈具的系統(tǒng)熱阻決定的。加入用于熱失散的燈殼接觸環(huán)境空間的面積為A，此面積大小就決定了兩者之間的溫差。當(dāng)A趨于無(wú)窮大時(shí)，燈殼與環(huán)境等溫。這是做不到的。日本西鐵城等公司，測(cè)算出散熱器面積與Tj的關(guān)系曲線。一個(gè)，要使Tj從100℃下降到80℃，散熱器與空氣接觸面積要增加60平方里面以上，由此可估算：60cm2/；每增加1W電功率的LED，若用60平方厘米以上的散熱器時(shí)，其Tj結(jié)溫將下降20℃。計(jì)算：那么用約用℃。那么，燈具系統(tǒng)熱阻Rthsystem=20/℃/w；于是對(duì)燈具施加，在Ta=25℃時(shí)，燈殼上的溫度應(yīng)該是：Tscase=25℃+℃；此時(shí)，通過(guò)前面的計(jì)算，我們可以知道LEDPN結(jié)溫是：Tj=45+℃；PN結(jié)溫Tj比起光效值100lm/WTj=25℃的時(shí)候，高了（）=℃；也就是一個(gè)100lm的LED光通量較Tj=25℃的時(shí)候要低：；100個(gè)LED等于比Tj=25℃時(shí)候，低；由此可以得知燈具的熱效率=（1-735/10000)=。所以：三個(gè)部分疊加后。四川節(jié)能LED報(bào)價(jià)表</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2638871.html</p></div></div></div></div></div><div id="auibf2t" class="page-right 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