蓄電池充電機反饋回路開路
2019/4/25 9:41:43??????點擊：
如(ru)果(guo)(guo)蓄(xu)電(dian)(dian)(dian)池充電(dian)(dian)(dian)機(ji)變壓(ya)器次級的電(dian)(dian)(dian)壓(ya)反饋回路(lu)開(kai)路(lu)，即分壓(ya)電(dian)(dian)(dian)阻開(kai)路(lu)，反饋電(dian)(dian)(dian)壓(ya)不(bu)(bu)能輸(shu)(shu)入(ru)ＰＷＭ脈寬調(diao)(diao)制芯片輸(shu)(shu)入(ru)腳，或者(zhe)初級線圈電(dian)(dian)(dian)流(liu)(liu)過大，脈寬調(diao)(diao)制芯片SG3525過流(liu)(liu)保護(hu)工作，或者(zhe)光(guang)耦合器PC817故障，SG3525的輸(shu)(shu)出(chu)脈沖(chong)信號不(bu)(bu)能送到專用驅動(dong)芯片IR2110，都(dou)會使輸(shu)(shu)出(chu)電(dian)(dian)(dian)壓(ya)為零。檢(jian)測思路(lu)：先查(cha)反饋分壓(ya)電(dian)(dian)(dian)阻各點(dian)電(dian)(dian)(dian)壓(ya)。如(ru)果(guo)(guo)正(zheng)常(chang)(chang)，再(zai)查(cha)SG3525的輸(shu)(shu)出(chu)引腳，如(ru)果(guo)(guo)蓄(xu)電(dian)(dian)(dian)池充電(dian)(dian)(dian)機(ji)輸(shu)(shu)出(chu)脈沖(chong)信號正(zheng)常(chang)(chang)，再(zai)查(cha)IR2110輸(shu)(shu)入(ru)信號。若IR2110輸(shu)(shu)入(ru)異常(chang)(chang)，則可能是光(guang)耦合器PC817故障，更換(huan)同(tong)型號光(guang)耦。若前面檢(jian)測都(dou)正(zheng)常(chang)(chang)，再(zai)查(cha)IR2110的兩個脈沖(chong)輸(shu)(shu)出(chu)信號，如(ru)果(guo)(guo)發(fa)現異常(chang)(chang)，則是驅動(dong)芯片故障，更換(huan)芯片。
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