如今,開(kai)(kai)關(guan)(guan)電源現已普及(ji)到(dao)日常生活的(de)方(fang)方(fang)面(mian)(mian)面(mian)(mian)。無論處于(yu)哪個生活環境里邊,只要(yao)有用電設備(bei)就都會(hui)發現開(kai)(kai)關(guan)(guan)電源的(de)身影。其實有需(xu)求用電的(de)當地就會(hui)看到(dao)開(kai)(kai)關(guan)(guan)電源在附(fu)近了(le)。接下(xia)來,說(shuo)下(xia)開(kai)(kai)關(guan)(guan)電源不起振的(de)原因于(yu)咱(zan)們解解惑。
首要(yao)咱們(men)先來(lai)看看開關(guan)電源為什么要(yao)起(qi)振(zhen),起(qi)振(zhen)有什么用?
開關電源起振作用
開關電(dian)源,便(bian)是一(yi)個(ge)溝通變(bian)(bian)(bian)(bian)直(zhi)(zhi)流,然(ran)后直(zhi)(zhi)流再變(bian)(bian)(bian)(bian)成溝通,溝通再變(bian)(bian)(bian)(bian)直(zhi)(zhi)流的的進程。不(bu)安穩的溝通市電(dian)首要(yao)(yao)經(jing)過整(zheng)流濾波變(bian)(bian)(bian)(bian)成直(zhi)(zhi)流,供電(dian)子(zi)電(dian)路(lu)工作,這(zhe)(zhe)個(ge)電(dian)路(lu)包括(kuo)高頻振蕩電(dian)路(lu),也(ye)便(bian)是將直(zhi)(zhi)流變(bian)(bian)(bian)(bian)成頻率或(huo)脈(mo)寬可變(bian)(bian)(bian)(bian)的脈(mo)沖,這(zhe)(zhe)部分(fen)在開關電(dian)路(lu)中很重要(yao)(yao),輸(shu)入電(dian)壓變(bian)(bian)(bian)(bian)化或(huo)負載(zai)增大變(bian)(bian)(bian)(bian)小,振蕩電(dian)路(lu)會經(jing)過調整(zheng)頻率或(huo)脈(mo)寬來(lai)堅持輸(shu)出(chu)安穩。這(zhe)(zhe)便(bian)是它的作用(yong),要(yao)(yao)想起(qi)到(dao)這(zhe)(zhe)個(ge)作用(yong)當(dang)然(ran)就要(yao)(yao)起(qi)振了(le),不(bu)起(qi)振就闡明(ming)開關電(dian)源出(chu)毛病了(le),也(ye)不(bu)會有輸(shu)出(chu)了(le)。
那開關電(dian)源為什么會(hui)不起振呢(ni)?
開關電源不起(qi)振原因有:
1,初級(電(dian)源)電(dian)壓(ya)過高(gao)或過低(di)
2,啟動電路開路
3,電(dian)源IC供電(dian)腳短路(lu)或開路(lu)
4,電源IC損壞
5,光耦短路
6,開關變壓(ya)器匝間(jian)短路
7,尖(jian)峰吸收(shou)電路短(duan)路(有維護功用(yong)的電源)
8,脈(mo)寬調制管短(duan)路(A3電源(yuan))
9,輸出短路
10,熱端電(dian)解電(dian)容壞
以上便是開關電(dian)源不起振的(de)原因(yin)了。