如(ru)今，開(kai)關(guan)電源現(xian)已普及到日常生(sheng)活的方方面面。無論處于(yu)哪個生(sheng)活環境里邊，只要有用(yong)電設備就都會(hui)發現(xian)開(kai)關(guan)電源的身影。其實有需求用(yong)電的當地就會(hui)看到開(kai)關(guan)電源在附近了。接下來，說下開(kai)關(guan)電源不起振的原因于(yu)咱(zan)們解解惑(huo)。

首要(yao)咱(zan)們先來看看開關(guan)電源為什(shen)么要(yao)起振，起振有什(shen)么用？

開關電源起振作用

開(kai)(kai)關(guan)電(dian)(dian)(dian)源(yuan)，便(bian)(bian)是一個溝(gou)(gou)(gou)通(tong)變(bian)(bian)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)，然(ran)后直(zhi)(zhi)(zhi)流(liu)(liu)(liu)再變(bian)(bian)成(cheng)溝(gou)(gou)(gou)通(tong)，溝(gou)(gou)(gou)通(tong)再變(bian)(bian)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)的(de)的(de)進程。不(bu)安(an)穩的(de)溝(gou)(gou)(gou)通(tong)市電(dian)(dian)(dian)首要(yao)經過(guo)整流(liu)(liu)(liu)濾波變(bian)(bian)成(cheng)直(zhi)(zhi)(zhi)流(liu)(liu)(liu)，供電(dian)(dian)(dian)子電(dian)(dian)(dian)路工作(zuo)(zuo)，這個電(dian)(dian)(dian)路包(bao)括高頻(pin)振蕩(dang)電(dian)(dian)(dian)路，也便(bian)(bian)是將直(zhi)(zhi)(zhi)流(liu)(liu)(liu)變(bian)(bian)成(cheng)頻(pin)率(lv)或(huo)(huo)脈寬可變(bian)(bian)的(de)脈沖，這部分在(zai)開(kai)(kai)關(guan)電(dian)(dian)(dian)路中很重要(yao)，輸(shu)入電(dian)(dian)(dian)壓變(bian)(bian)化或(huo)(huo)負載增大變(bian)(bian)小，振蕩(dang)電(dian)(dian)(dian)路會經過(guo)調整頻(pin)率(lv)或(huo)(huo)脈寬來(lai)堅持輸(shu)出安(an)穩。這便(bian)(bian)是它的(de)作(zuo)(zuo)用，要(yao)想(xiang)起(qi)到這個作(zuo)(zuo)用當然(ran)就(jiu)要(yao)起(qi)振了，不(bu)起(qi)振就(jiu)闡明開(kai)(kai)關(guan)電(dian)(dian)(dian)源(yuan)出毛病(bing)了，也不(bu)會有輸(shu)出了。

那開關電源(yuan)為什么(me)會(hui)不起(qi)振呢？

開關電源不(bu)起振原因有：

1，初級（電(dian)(dian)源）電(dian)(dian)壓過(guo)高或過(guo)低

2，啟動電路開路

3，電源IC供電腳短(duan)路(lu)或(huo)開路(lu)

4，電源IC損壞

5，光耦短路

6，開(kai)關(guan)變(bian)壓器匝間短路(lu)

7，尖(jian)峰吸(xi)收電(dian)路(lu)(lu)短(duan)路(lu)(lu)（有維護功用的電(dian)源）

8，脈寬調制管短路（A3電源）

9，輸出短路

10，熱端電解電容(rong)壞

以上便是開關(guan)電源不起(qi)振的原因了。