g412v燈珠用什么調壓 led燈珠接12伏用什么電子元件好 |
| 發布時間:2022-10-28 10:25:38 |
大家好我是天成(cheng)照(zhao)明LED燈(deng)珠廠家小(xiao)編燈(deng)漂亮今(jin)天我們來(lai)介紹g412v燈(deng)珠用(yong)什么(me)調(diao)壓 led燈(deng)珠接12伏用(yong)什么(me)電(dian)子元件(jian)好的問題(ti)，以下就是燈(deng)漂亮對此問題(ti)和相關問題(ti)的歸納(na)整理(li),一起(qi)來(lai)看看吧。 文章目錄導讀:
LED燈珠接12伏用什么電子元件 一個LED燈(deng)接(jie)在12V電(dian)池上需要多大的(de)限流電(dian)阻(zu)，這要看是哪種(zhong)LED燈(deng)珠了。若是普通的(de)小功率(lv)LED燈(deng)珠，可以(yi)采用串聯限流電(dian)阻(zu)這種(zhong)方(fang)(fang)式(shi)(shi)來點亮。對(dui)于大功率(lv)LED燈(deng)珠，一般需要采用恒流驅(qu)動方(fang)(fang)式(shi)(shi)點亮。下面我(wo)們分別(bie)介紹一下12V電(dian)池點亮小功率(lv)LED燈(deng)珠和大功率(lv)LED燈(deng)珠的(de)方(fang)(fang)法。 1、12V電(dian)池(chi)點(dian)亮小功率LED燈(deng)珠(zhu)時，限流電(dian)阻的計算 12V電(dian)池點亮小(xiao)功率LED燈珠(zhu)。 一般(ban)(ban)作(zuo)為(wei)各(ge)種指示燈的(de)小功率(lv)LED燈珠(zhu)的(de)最大工作(zuo)電(dian)流(liu)(liu)為(wei)20mA，實際(ji)中取215mA即可。藍色(se)和白色(se)LED燈珠(zhu)的(de)正(zheng)(zheng)向壓(ya)(ya)降一般(ban)(ban)在3V左右，紅色(se)LED的(de)正(zheng)(zheng)向壓(ya)(ya)降在1.62V，綠色(se)LED的(de)正(zheng)(zheng)向壓(ya)(ya)降一般(ban)(ban)在1.82.4V。這里假設點亮的(de)是一個(ge)藍色(se)小功率(lv)LED燈珠(zhu)，其正(zheng)(zheng)向壓(ya)(ya)降為(wei)3V，工作(zuo)電(dian)流(liu)(liu)取9mA，則限(xian)流(liu)(liu)電(dian)阻R=（12V-3V）／9mA=1KΩ。這就是小功率(lv)LED燈珠(zhu)限(xian)流(liu)(liu)電(dian)阻的(de)計算方法。
之前普通12vG4燈珠常壞想換led節能燈珠連變壓器一起換是選擇220v的好還是12v的配一個恒壓穩流的好 20w12v的和20w220v區別是電(dian)(dian)源(yuan)電(dian)(dian)壓不一樣(yang)，燈(deng)絲(si)電(dian)(dian)阻也不一樣(yang)，20w12v是12V供電(dian)(dian)（交直流都(dou)可(ke)以(yi)），20w220v是220V供電(dian)(dian)（一般就是交流）。 如(ru)果要換成20w220v的，就(jiu)變(bian)壓(ya)器(qi)都可以(yi)不要了，直(zhi)接接市電220V就(jiu)可以(yi)，只是注意電源安全。 如(ru)果換成(cheng)LED，原來的(de)變壓器可以(yi)繼續(xu)使(shi)用，但一般要(yao)加整流(liu)(liu)以(yi)及恒流(liu)(liu)驅動電路，比較(jiao)麻煩(fan)。要(yao)么(me)就直接使(shi)用LED廠家配套電源。 變(bian)壓器好像沒有直(zhi)流的(de)燈珠和變(bian)壓器容(rong)易壞，主要是電壓不(bu)穩、功率(lv)不(bu)足以及散熱不(bu)良等因(yin)素造成。 燈珠加電阻怎么調節 用的(de)是白光LED吧因為LED品種很多，功(gong)率不(bu)一樣(yang)(yang)，額(e)定的(de)電(dian)流也不(bu)一樣(yang)(yang)，找(zhao)到LED的(de)額(e)定電(dian)流，才能確定使用多大(da)的(de)電(dian)阻。 一(yi)(yi)般LED白(bai)光，工(gong)(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)壓(ya)在3.2到3.4,電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)要(yao)看LED額(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，比(bi)如(ru)一(yi)(yi)個1W的(de)(de)燈(deng)珠，額(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)一(yi)(yi)般是(shi)(shi)350MA，一(yi)(yi)般我會(hui)降(jiang)低(di)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)來提(ti)高(gao)壽命，會(hui)取工(gong)(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)300mA內，工(gong)(gong)作(zuo)電(dian)(dian)(dian)(dian)(dian)壓(ya)取3.2，usb 5V，這樣電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)分壓(ya)就(jiu)是(shi)(shi)5減去(qu)3.2，電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)300，歐(ou)姆定(ding)律就(jiu)可以(yi)算(suan)出電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)大(da)(da)小(xiao)（有(you)條件接(jie)通后，用(yong)(yong)(yong)(yong)(yong)測電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，微調(diao)，這個也(ye)是(shi)(shi)取電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)低(di)于額(e)(e)定(ding)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)用(yong)(yong)(yong)(yong)(yong)處），不過需(xu)要(yao)注意的(de)(de)是(shi)(shi)這個電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)功率(lv)(lv)是(shi)(shi)要(yao)比(bi)較大(da)(da)的(de)(de)，耗在電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)上(shang)(shang)(shang)的(de)(de)有(you)0.5W左(zuo)右(you)，取2倍以(yi)上(shang)(shang)(shang)，要(yao)用(yong)(yong)(yong)(yong)(yong)1W以(yi)上(shang)(shang)(shang)的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)。如(ru)果(guo)多(duo)顆燈(deng)珠，就(jiu)要(yao)并聯(lian)(lian)了，當然(ran)了因(yin)為USB2.0的(de)(de)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)只有(you)500mA左(zuo)右(you)，并聯(lian)(lian)多(duo)了，只會(hui)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)更低(di)而已，串聯(lian)(lian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)功率(lv)(lv)要(yao)更大(da)(da)了，還有(you)一(yi)(yi)個就(jiu)是(shi)(shi)要(yao)注意的(de)(de)是(shi)(shi)LED的(de)(de)散熱問(wen)題，如(ru)果(guo)鋁基板(ban)小(xiao)，散熱條件差點的(de)(de)，盡(jin)量降(jiang)低(di)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)。目前我用(yong)(yong)(yong)(yong)(yong)3顆1W并聯(lian)(lian)，串了7歐(ou)多(duo)點的(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)（三(san)顆1W，22歐(ou)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)并聯(lian)(lian)），已經用(yong)(yong)(yong)(yong)(yong)了2年多(duo)了，主要(yao)是(shi)(shi)晚上(shang)(shang)(shang)，關燈(deng)了照屏(ping)幕，不然(ran)太刺眼(yan)了 12伏的G4燈珠用56至50伏的驅動怎么不會被燒掉呢 為適(shi)應(ying)驅動(dong)電壓，可以把(ba)燈(deng)珠分組。每5只燈(deng)為一組，每只燈(deng)珠首尾相接(jie)組成串聯形式(shi)。然后將每組燈(deng)珠的兩(liang)端分別接(jie)于驅動(dong)電源輸出端就能正常使用(yong)而不會被燒(shao)掉了。 12v直流電珠怎么把燈光減弱 把電(dian)(dian)(dian)壓降(jiang)下來，燈光(guang)就(jiu)(jiu)會減弱(ruo)的。可(ke)調電(dian)(dian)(dian)壓有多種電(dian)(dian)(dian)路，最簡(jian)單的就(jiu)(jiu)是串(chuan)(chuan)聯一個(ge)電(dian)(dian)(dian)位(wei)器(qi)。電(dian)(dian)(dian)位(wei)器(qi)的阻值可(ke)以根(gen)據(ju)電(dian)(dian)(dian)珠的電(dian)(dian)(dian)流(liu)大(da)小來確定，一般用(yong)幾十(shi)歐姆的電(dian)(dian)(dian)位(wei)器(qi)就(jiu)(jiu)可(ke)以了。根(gen)據(ju)串(chuan)(chuan)聯電(dian)(dian)(dian)路的分(fen)壓公式(shi)I=U/(R1+R2)。串(chuan)(chuan)聯是連接電(dian)(dian)(dian)路元(yuan)件(jian)的基本方式(shi)之一。將(jiang)電(dian)(dian)(dian)路元(yuan)件(jian)（如電(dian)(dian)(dian)阻、電(dian)(dian)(dian)容、電(dian)(dian)(dian)感,用(yong)電(dian)(dian)(dian)器(qi)等(deng)）逐個(ge)順(shun)次首尾相(xiang)連接。將(jiang)各用(yong)電(dian)(dian)(dian)器(qi)串(chuan)(chuan)聯起來組成的電(dian)(dian)(dian)路叫串(chuan)(chuan)聯電(dian)(dian)(dian)路。 串聯電(dian)路是把元件逐個(ge)順次(ci)連接起來組成的(de)電(dian)路。特點(dian)是流過一個(ge)元件的(de)電(dian)流同時也流過另(ling)一個(ge)。 以上就(jiu)是天成小編對(dui)于g412v燈珠用(yong)什(shen)么(me)調壓 led燈珠接12伏(fu)用(yong)什(shen)么(me)電子元件好問題和(he)相關問題的解(jie)答了(le)，希望(wang)對(dui)你(ni)有用(yong) 【責任編輯：燈漂亮】 |
