大家好(hao)今天來(lai)介紹led燈珠變壓器原理(li)(led燈驅動原理(li))的(de)問題，以下是小編對此問題的(de)歸(gui)納整(zheng)理(li)，來(lai)看看吧。

文章目錄列表:

• 1、led燈適配器原理
• 2、LED驅動器自動變壓原理是什么
• 3、為什么LED變壓器輸出103伏不會觸電
• 4、led燈帶變壓器好還是不帶變壓器好
• 5、led燈無電容變壓原理

led燈適配器原理

Led燈(deng)的(de)適配器，其(qi)實就是(shi)一個小變壓器，把220伏的(de)交流電變為24伏的(de)直(zhi)流電，然后供(gong)電給led燈(deng)

LED驅動器自動變壓原理是什么

驅動(dong)器是將家用交流(liu)電(dian)通過濾波整(zheng)流(liu)、高頻激勵變壓轉換成led燈珠組(zu)所需要(yao)的正向直流(liu)電(dian)壓的這樣一種電(dian)源(yuan)裝(zhuang)置。

為什么LED變壓器輸出103伏不會觸電

為什(shen)么LED變壓器(qi)輸出103伏不會(hui)觸電，這個問題不是絕對的(de)(de)。103伏相對安全電壓來講已經算是高電壓了，會(hui)不會(hui)觸電一般要看LED變壓器(qi)的(de)(de)結構。

LED變壓器工作原理

LED由(you)于其(qi)具有光效高(gao)、壽命(ming)長、便于調(diao)光等(deng)特點，已經逐漸(jian)代替了(le)日光燈、節(jie)能燈等(deng)常(chang)規照明燈具。LED與節(jie)能燈一樣，是無法直接接在家用(yong)交流電(dian)(dian)路中使用(yong)的(de)(de)，因(yin)為LED單體燈珠的(de)(de)工作(zuo)電(dian)(dian)壓比(bi)較(jiao)小，所以(yi)需要通過串并聯組合后，再由(you)LED變壓器把輸入電(dian)(dian)壓降低后供電(dian)(dian)。市面上的(de)(de)LED變壓器的(de)(de)種(zhong)(zhong)類是比(bi)較(jiao)多的(de)(de)，比(bi)較(jiao)常(chang)見的(de)(de)幾種(zhong)(zhong)比(bi)如阻容降壓式(shi)、恒流驅動(dong)式(shi)等(deng)等(deng)。

阻容降壓式

阻容(rong)(rong)降(jiang)壓(ya)式(shi)的(de)LED電(dian)源是(shi)(shi)結構最為簡單(dan)，也(ye)(ye)是(shi)(shi)成本相(xiang)對較低(di)的(de)一種驅動方(fang)(fang)式(shi)，阻容(rong)(rong)降(jiang)壓(ya)同樣(yang)是(shi)(shi)在小功率供電(dian)電(dian)路(lu)中(zhong)常(chang)被使用(yong)的(de)降(jiang)壓(ya)方(fang)(fang)式(shi)。阻容(rong)(rong)降(jiang)壓(ya)電(dian)路(lu)的(de)工作(zuo)原理主要是(shi)(shi)利用(yong)了交流電(dian)通過(guo)電(dian)容(rong)(rong)時會產生(sheng)容(rong)(rong)抗，通過(guo)電(dian)容(rong)(rong)與負載部(bu)分串聯，或由穩壓(ya)電(dian)路(lu)穩壓(ya)后給負載供電(dian)的(de)，它實際上也(ye)(ye)是(shi)(shi)一種串聯分壓(ya)電(dian)路(lu)。

由上圖的(de)阻(zu)容降壓(ya)電(dian)(dian)(dian)路，交(jiao)流(liu)電(dian)(dian)(dian)輸入(ru)之后(hou)(hou)經過(guo)電(dian)(dian)(dian)容C1后(hou)(hou)，經過(guo)整流(liu)橋整流(liu)，穩(wen)(wen)壓(ya)二極(ji)管的(de)穩(wen)(wen)壓(ya)以及(ji)(ji)電(dian)(dian)(dian)容Co的(de)濾波之后(hou)(hou)給(gei)LED燈(deng)串供電(dian)(dian)(dian)，如(ru)果LED的(de)串數較多(duo)時，有(you)時也會忽(hu)略穩(wen)(wen)壓(ya)二極(ji)管。并聯在電(dian)(dian)(dian)容C1兩(liang)端的(de)電(dian)(dian)(dian)阻(zu)R1的(de)主要(yao)作用是為(wei)C1提供泄放回路，當交(jiao)流(liu)電(dian)(dian)(dian)斷電(dian)(dian)(dian)時，由于電(dian)(dian)(dian)容上會有(you)電(dian)(dian)(dian)壓(ya)殘存，如(ru)果不(bu)及(ji)(ji)時泄放，觸(chu)摸插頭時就有(you)可能觸(chu)電(dian)(dian)(dian)。

阻容降壓式LED電(dian)源的(de)(de)優點(dian)是(shi)結構簡單、成本(ben)低，但是(shi)它的(de)(de)缺(que)點(dian)也比較(jiao)明(ming)顯(xian)，一(yi)(yi)個是(shi)沒有(you)(you)(you)抗沖(chong)擊(ji)保護，在上電(dian)瞬間(jian)存在高電(dian)壓擊(ji)穿(chuan)LED的(de)(de)可(ke)能(neng)，另(ling)外(wai)一(yi)(yi)點(dian)，由(you)于LED屬(shu)(shu)于電(dian)流敏感(gan)型元件，驅動電(dian)流的(de)(de)微弱(ruo)變化就(jiu)有(you)(you)(you)可(ke)能(neng)帶(dai)來溫(wen)(wen)度較(jiao)大(da)幅(fu)度的(de)(de)變化，這樣(yang)不但不會帶(dai)來亮度的(de)(de)提高，還有(you)(you)(you)可(ke)能(neng)因(yin)為溫(wen)(wen)度過高造成LED光衰或者損壞。由(you)于阻容降壓電(dian)路屬(shu)(shu)于電(dian)壓輸出型的(de)(de)電(dian)源，它對于LED的(de)(de)使(shi)用壽(shou)命是(shi)不利(li)的(de)(de)。

恒流驅動電源

由于LED燈(deng)(deng)的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流特性(xing)，使用恒(heng)(heng)定電(dian)(dian)(dian)(dian)(dian)流驅(qu)(qu)(qu)(qu)動(dong)方式是(shi)有利(li)于延長其使用壽命的(de)(de)(de)(de)(de)(de)。所(suo)以(yi)(yi)(yi)市面(mian)上(shang)(shang)(shang)(shang)大(da)(da)部分(fen)的(de)(de)(de)(de)(de)(de)LED電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)使用的(de)(de)(de)(de)(de)(de)都是(shi)恒(heng)(heng)流驅(qu)(qu)(qu)(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)。恒(heng)(heng)流驅(qu)(qu)(qu)(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)(de)(de)基本結構，實際(ji)上(shang)(shang)(shang)(shang)是(shi)一個開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)，只不過(guo)這(zhe)(zhe)(zhe)種電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)(de)(de)采(cai)樣檢測是(shi)電(dian)(dian)(dian)(dian)(dian)流。當(dang)LED接入電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)時(shi)，輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)流會(hui)保(bao)持恒(heng)(heng)定，電(dian)(dian)(dian)(dian)(dian)壓(ya)會(hui)在小范(fan)圍內波動(dong)。為了避(bi)免輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)超(chao)過(guo)LED工作(zuo)的(de)(de)(de)(de)(de)(de)額定電(dian)(dian)(dian)(dian)(dian)壓(ya)，LED的(de)(de)(de)(de)(de)(de)恒(heng)(heng)流電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)同樣需要對電(dian)(dian)(dian)(dian)(dian)壓(ya)進行(xing)采(cai)樣進行(xing)過(guo)壓(ya)保(bao)護，所(suo)以(yi)(yi)(yi)LED的(de)(de)(de)(de)(de)(de)恒(heng)(heng)流驅(qu)(qu)(qu)(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)屬于限壓(ya)恒(heng)(heng)流。市面(mian)上(shang)(shang)(shang)(shang)常用的(de)(de)(de)(de)(de)(de)LED驅(qu)(qu)(qu)(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)(de)(de)樣式是(shi)很多的(de)(de)(de)(de)(de)(de)，但(dan)是(shi)其工作(zuo)原理都是(shi)基本一樣的(de)(de)(de)(de)(de)(de)。LED的(de)(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)流恒(heng)(heng)定，所(suo)以(yi)(yi)(yi)它的(de)(de)(de)(de)(de)(de)輸(shu)出(chu)(chu)(chu)參數上(shang)(shang)(shang)(shang)會(hui)標出(chu)(chu)(chu)輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)流以(yi)(yi)(yi)及輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)范(fan)圍，由這(zhe)(zhe)(zhe)兩(liang)個參數就(jiu)確定了這(zhe)(zhe)(zhe)個電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)所(suo)能驅(qu)(qu)(qu)(qu)動(dong)的(de)(de)(de)(de)(de)(de)最大(da)(da)功率(lv)。大(da)(da)部分(fen)的(de)(de)(de)(de)(de)(de)LED恒(heng)(heng)流電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)(yuan)是(shi)以(yi)(yi)(yi)1W作(zuo)為輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)流的(de)(de)(de)(de)(de)(de)標準，比如280mA-310mA，而(er)不同的(de)(de)(de)(de)(de)(de)輸(shu)出(chu)(chu)(chu)功率(lv)，主要體(ti)現在輸(shu)出(chu)(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓(ya)范(fan)圍上(shang)(shang)(shang)(shang)。所(suo)以(yi)(yi)(yi)LED的(de)(de)(de)(de)(de)(de)燈(deng)(deng)板大(da)(da)部分(fen)是(shi)通(tong)過(guo)并聯(lian)方式把燈(deng)(deng)珠做成1W的(de)(de)(de)(de)(de)(de)功率(lv)，通(tong)過(guo)多燈(deng)(deng)珠串聯(lian)的(de)(de)(de)(de)(de)(de)方式生產出(chu)(chu)(chu)不同功率(lv)的(de)(de)(de)(de)(de)(de)LED燈(deng)(deng)。

恒流LED驅動電(dian)(dian)源(yuan)使用(yong)的(de)(de)方(fang)案(an)芯片有很多種(zhong)，大(da)致分為(wei)兩類，一(yi)種(zhong)是(shi)隔離(li)型，另一(yi)種(zhong)是(shi)非隔離(li)型。非隔離(li)型電(dian)(dian)源(yuan)的(de)(de)特點是(shi)輸(shu)入(ru)的(de)(de)交流電(dian)(dian)壓(ya)(ya)經過整流后(hou)，由驅動芯片內部的(de)(de)開(kai)關管調(diao)整后(hou)直接輸(shu)出驅動LED，電(dian)(dian)流的(de)(de)采樣(yang)也從高(gao)(gao)壓(ya)(ya)部分進行(xing)。這種(zhong)電(dian)(dian)源(yuan)的(de)(de)特點是(shi)不需(xu)要使用(yong)使用(yong)隔離(li)變壓(ya)(ya)器(qi)，只需(xu)使用(yong)儲能(neng)(neng)電(dian)(dian)感，能(neng)(neng)夠節(jie)省(sheng)一(yi)部分成本(ben)，缺點是(shi)輸(shu)出部分直接與高(gao)(gao)壓(ya)(ya)相(xiang)連。

另一種(zhong)隔離型LED驅動電(dian)(dian)源使(shi)用了隔離變壓器把輸入(ru)與輸出部分(fen)隔離開，這(zhe)樣從安全角度來講有(you)所(suo)提高(gao)(gao)，但是需要使(shi)用隔離變壓器，生產制造成本上(shang)會有(you)所(suo)提高(gao)(gao)。這(zhe)種(zhong)電(dian)(dian)源一般用在人體容易接觸的LED燈(deng)具，比如(ru)臺燈(deng)的電(dian)(dian)路中，而吸頂的LED燈(deng)具基(ji)本上(shang)都是使(shi)用的非(fei)隔離型的驅動電(dian)(dian)源。

LED電源輸出的電壓會不會引起觸電

從上(shang)面(mian)的(de)(de)(de)(de)驅動(dong)原理上(shang)可以(yi)了解，LED的(de)(de)(de)(de)燈板一般是(shi)通過串聯(lian)方式(shi)連接的(de)(de)(de)(de)，所以(yi)它的(de)(de)(de)(de)驅動(dong)電壓一般是(shi)比較高的(de)(de)(de)(de)，少(shao)的(de)(de)(de)(de)幾十伏(fu)，多的(de)(de)(de)(de)可以(yi)到一百伏(fu)以(yi)上(shang)。并且(qie)，無論是(shi)阻(zu)容降壓式(shi)的(de)(de)(de)(de)驅動(dong)電源(yuan)，還是(shi)恒流式(shi)的(de)(de)(de)(de)驅動(dong)電源(yuan)，在未接入(ru)LED燈板時(shi)，輸出電壓也會比接入(ru)燈板工作時(shi)的(de)(de)(de)(de)電壓要高。

家(jia)庭220V電(dian)(dian)路(lu)中(zhong)，觸(chu)摸單(dan)根(gen)火(huo)線時，就會造(zao)成觸(chu)電(dian)(dian)，因為火(huo)線通過人體與大地構成了(le)回(hui)路(lu)。如(ru)果觸(chu)摸LED驅動電(dian)(dian)源的(de)輸(shu)(shu)出(chu)(chu)，也(ye)是(shi)(shi)(shi)有可能觸(chu)電(dian)(dian)的(de)。對于阻容降壓電(dian)(dian)路(lu)以及非隔離(li)型恒流驅動來講，由于輸(shu)(shu)出(chu)(chu)與輸(shu)(shu)入未進行(xing)隔離(li)，觸(chu)摸輸(shu)(shu)出(chu)(chu)的(de)單(dan)根(gen)線也(ye)是(shi)(shi)(shi)容易觸(chu)電(dian)(dian)的(de)；對于隔離(li)型LED驅動電(dian)(dian)源，觸(chu)摸輸(shu)(shu)出(chu)(chu)的(de)單(dan)根(gen)線不會引起觸(chu)電(dian)(dian)，但是(shi)(shi)(shi)兩根(gen)同時觸(chu)摸也(ye)是(shi)(shi)(shi)會造(zao)成觸(chu)電(dian)(dian)的(de)。

為(wei)了避(bi)免觸電(dian)時(shi)(shi)候，很多家庭供電(dian)配電(dian)中都是安裝有(you)漏(lou)電(dian)保(bao)護(hu)裝置的(de)，它能夠(gou)檢(jian)測剩余電(dian)流(liu)，當電(dian)流(liu)超過一定值（一般為(wei)30mA）時(shi)(shi)會切斷電(dian)源。但(dan)是漏(lou)電(dian)保(bao)護(hu)僅僅是單線觸摸(mo)與地構(gou)成回路是才有(you)可能起(qi)作用。兩(liang)線（火線與零(ling)線，或者LED電(dian)源輸出的(de)兩(liang)線）觸摸(mo)時(shi)(shi)是不會起(qi)作用的(de)。

所以，為了防止觸電危險，在更換LED燈具或電源時，一定要切斷電源，不能帶電操作。

led燈帶變壓器好還是不帶變壓器好

LED燈帶(dai)是(shi)用(yong)恒(heng)流變壓(ya)器好。因為LED的使用(yong)壽命(ming)只受(shou)電流影響，要求其電源必須恒(heng)流。

恒流(liu)變壓(ya)器(qi)，一般都是(shi)電(dian)(dian)(dian)(dian)流(liu)互(hu)(hu)感(gan)(gan)器(qi)。電(dian)(dian)(dian)(dian)流(liu)互(hu)(hu)感(gan)(gan)器(qi)的(de)(de)(de)原理是(shi)依據(ju)電(dian)(dian)(dian)(dian)磁感(gan)(gan)應原理的(de)(de)(de)。電(dian)(dian)(dian)(dian)流(liu)互(hu)(hu)感(gan)(gan)器(qi)是(shi)由閉合(he)的(de)(de)(de)鐵(tie)心和繞組(zu)組(zu)成。它的(de)(de)(de)一次(ci)側(ce)繞組(zu)匝數(shu)很少，串(chuan)在(zai)需要(yao)測(ce)量(liang)的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)線(xian)路中，因(yin)(yin)此(ci)它經(jing)常有(you)線(xian)路的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)流(liu)過，二次(ci)側(ce)繞組(zu)匝數(shu)比較多，串(chuan)接在(zai)測(ce)量(liang)儀(yi)表和保(bao)護回路中，電(dian)(dian)(dian)(dian)流(liu)互(hu)(hu)感(gan)(gan)器(qi)在(zai)工(gong)作時(shi)，它的(de)(de)(de)二次(ci)側(ce)回路始終是(shi)閉合(he)的(de)(de)(de)，因(yin)(yin)此(ci)測(ce)量(liang)儀(yi)表和保(bao)護回路串(chuan)聯線(xian)圈的(de)(de)(de)阻抗很小，電(dian)(dian)(dian)(dian)流(liu)互(hu)(hu)感(gan)(gan)器(qi)的(de)(de)(de)工(gong)作狀態接近短路。電(dian)(dian)(dian)(dian)流(liu)互(hu)(hu)感(gan)(gan)器(qi)是(shi)把一次(ci)側(ce)大電(dian)(dian)(dian)(dian)流(liu)轉換成二次(ci)側(ce)小電(dian)(dian)(dian)(dian)流(liu)來測(ce)量(liang) ，二次(ci)側(ce)不可(ke)開路。

led燈無電容變壓原理

這個(ge)線(xian)性的驅動IC,其實就是一個(ge)MOS管，那個(ge)電阻就是采樣用的調節輸(shu)出(chu)電流(liu)的

以(yi)上就是小(xiao)編對于led燈珠變壓器原理(led燈驅動原理)問(wen)(wen)題和相關(guan)問(wen)(wen)題的解答了，希望對你有用