led燈珠超電流 |
| 發布時間:2022-09-30 16:11:57 |
大(da)家好我是小編燈(deng)漂亮(liang)今(jin)天我們來介紹(shao)led燈(deng)珠(zhu)超電流 led燈(deng)珠(zhu)會不會燒壞的問(wen)題，以下就是燈(deng)漂亮(liang)對此問(wen)題和(he)相關問(wen)題的歸納整理(li),一(yi)起來看看吧。 文章目錄導航:
使用白光led燈珠為什么不能超電壓或超電流 不(bu)論(lun)是(shi)移動(dong)電(dian)(dian)(dian)(dian)源(yuan)(yuan)（標(biao)稱5V）還是(shi)鋰電(dian)(dian)(dian)(dian)池(chi)（標(biao)稱3.7V），都可以作(zuo)為led電(dian)(dian)(dian)(dian)源(yuan)(yuan)。由于(yu)(yu)(yu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)壓(ya)(ya)小于(yu)(yu)(yu)led燈(deng)珠工(gong)作(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)2倍，要想led燈(deng)珠正常(chang)發光，只能(neng)并(bing)聯使用。直接接電(dian)(dian)(dian)(dian)源(yuan)(yuan)，存在超(chao)壓(ya)(ya)導致的(de)超(chao)流(liu)，加速光衰甚(shen)至(zhi)燒毀（一會不(bu)久就出(chu)現一兩個(ge)LED在不(bu)斷的(de)閃爍，LED摸上去挺熱(re)的(de)---就是(shi)例證。閃爍表明(ming)已經(jing)損(sun)壞）。要讓led工(gong)作(zuo)在正常(chang)電(dian)(dian)(dian)(dian)壓(ya)(ya)下（相(xiang)(xiang)當(dang)于(yu)(yu)(yu)間接維持合適工(gong)作(zuo)電(dian)(dian)(dian)(dian)流(liu)），必須把電(dian)(dian)(dian)(dian)源(yuan)(yuan)比(bi)led多(duo)出(chu)的(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)加以分壓(ya)(ya)，最簡(jian)單的(de)就是(shi)根據物(wu)理學原理，串聯電(dian)(dian)(dian)(dian)阻(zu)分壓(ya)(ya)的(de)方法(fa)。理論(lun)計算方法(fa)如(ru)下每個(ge)支路(lu)的(de)電(dian)(dian)(dian)(dian)阻(zu)阻(zu)值（Ω）＝（電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)－3V）÷0.02電(dian)(dian)(dian)(dian)阻(zu)功率(lv)（W）＞（電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)－3V）×0.02。如(ru)果是(shi)n個(ge)led并(bing)聯后共用1個(ge)電(dian)(dian)(dian)(dian)阻(zu)的(de)阻(zu)值（Ω）＝（電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)－3V）÷n×0.02。電(dian)(dian)(dian)(dian)阻(zu)功率(lv)（W）＞（電(dian)(dian)(dian)(dian)源(yuan)(yuan)輸(shu)(shu)出(chu)電(dian)(dian)(dian)(dian)壓(ya)(ya)－3V）×n×0.02。注：led是(shi)非(fei)線性(xing)元件，燈(deng)珠的(de)內阻(zu)不(bu)是(shi)一個(ge)定(ding)值，不(bu)同工(gong)作(zuo)電(dian)(dian)(dian)(dian)流(liu)下呈現不(bu)同的(de)相(xiang)(xiang)當(dang)于(yu)(yu)(yu)阻(zu)值，實踐中(zhong)無(wu)需計算。
led燈珠電流過大會燒壞嗎 當然(ran)了(le)，led燈珠也(ye)是(shi)有額定電(dian)(dian)流的(de)當電(dian)(dian)流過(guo)大(da)(da)也(ye)會(hui)燒壞的(de)。不過(guo)相對來說(shuo)電(dian)(dian)壓過(guo)大(da)(da)對燈珠的(de)影響(xiang)更大(da)(da)一些(xie)，led燈珠就(jiu)是(shi)發光(guang)二極管(guan)它跟其(qi)它的(de)二極管(guan)特性上也(ye)是(shi)差(cha)不多的(de)，如(ru)果仔(zi)細看看其(qi)伏安特性曲(qu)線就(jiu)知道了(le)，當在某(mou)個點上當電(dian)(dian)壓略有增(zeng)加其(qi)電(dian)(dian)流就(jiu)會(hui)產生(sheng)巨(ju)大(da)(da)的(de)增(zeng)量(liang)。 led燈珠電流過大解決辦法 1、LED驅動電(dian)源(yuan)開(kai)機瞬間電(dian)流過大，這時電(dian)器(qi)的必然特性，瞬間的電(dian)流或電(dian)壓都是輸出(chu)的1.41倍，不(bu)過呢，對(dui)電(dian)器(qi)本(ben)身(shen)沒有任何危害(hai)，屬于正常現象。 2、電源(yuan)開機瞬間都(dou)含有這種峰值(zhi)電壓的沖擊，整(zheng)流電路內都(dou)專門設計(ji)這種限制(zhi)峰值(zhi)電壓的保護(hu)措(cuo)施。 LED電流增大超出20MA或者說到30MA50MA對LED燈帶有那些后果 對大功率的(de)(de)LED無所謂，但對草帽、5mm之類的(de)(de)小LED燈珠就(jiu)要命了，通(tong)常這些小的(de)(de)LED額(e)定(ding)電流也就(jiu)20ma，一(yi)辦讓其工作在(zai)15--18ma，到30MA-50MA，那只能是提早光(guang)衰哦，很快玩完的(de)(de) 電流過高對LED燈珠有什么影響 趙(zhao)盛文(wen)的(de)提問，我(wo)來回答，那(nei)您這驅動(dong)電(dian)(dian)源空載(zai)太(tai)過高(gao)(gao)了(le)的(de)話是有影響的(de)，首先您要知道LED燈珠(zhu)一(yi)(yi)(yi)共(gong)需要多大電(dian)(dian)壓(ya)，若,比這電(dian)(dian)壓(ya)高(gao)(gao)出太(tai)多，那(nei)燈的(de)壽命會(hui)有損壞的(de)，按(an)理說空載(zai)電(dian)(dian)壓(ya)應該比帶載(zai)高(gao)(gao)一(yi)(yi)(yi)點，但不能特高(gao)(gao)請您仔細的(de)查(cha)一(yi)(yi)(yi)查(cha)好(hao)嗎(ma) 以上就(jiu)是天成小編(bian)(bian)對于led燈(deng)珠超(chao)電(dian)流 led燈(deng)珠會不會燒壞問題(ti)和相關問題(ti)的解(jie)答了，希望對你有用 【責任編(bian)(bian)輯：燈(deng)漂亮】 |
