蓄電池充電機反饋回路開路
2019/4/25 9:41:43??????點擊：
如果(guo)蓄(xu)電(dian)(dian)(dian)池充電(dian)(dian)(dian)機變壓(ya)器次(ci)級的電(dian)(dian)(dian)壓(ya)反饋回(hui)路(lu)開路(lu)，即分壓(ya)電(dian)(dian)(dian)阻開路(lu)，反饋電(dian)(dian)(dian)壓(ya)不能輸入(ru)ＰＷＭ脈寬調制芯片(pian)(pian)輸入(ru)腳，或者(zhe)初級線圈(quan)電(dian)(dian)(dian)流過(guo)(guo)大，脈寬調制芯片(pian)(pian)SG3525過(guo)(guo)流保護工作(zuo)，或者(zhe)光(guang)耦(ou)合(he)器PC817故(gu)障，SG3525的輸出脈沖信(xin)號不能送到專用(yong)驅動芯片(pian)(pian)IR2110，都會(hui)使輸出電(dian)(dian)(dian)壓(ya)為零(ling)。檢(jian)測思(si)路(lu)：先查(cha)反饋分壓(ya)電(dian)(dian)(dian)阻各點電(dian)(dian)(dian)壓(ya)。如果(guo)正常(chang)，再查(cha)SG3525的輸出引腳，如果(guo)蓄(xu)電(dian)(dian)(dian)池充電(dian)(dian)(dian)機輸出脈沖信(xin)號正常(chang)，再查(cha)IR2110輸入(ru)信(xin)號。若IR2110輸入(ru)異(yi)(yi)常(chang)，則(ze)可能是(shi)光(guang)耦(ou)合(he)器PC817故(gu)障，更換(huan)同型號光(guang)耦(ou)。若前(qian)面(mian)檢(jian)測都正常(chang)，再查(cha)IR2110的兩個脈沖輸出信(xin)號，如果(guo)發現(xian)異(yi)(yi)常(chang)，則(ze)是(shi)驅動芯片(pian)(pian)故(gu)障，更換(huan)芯片(pian)(pian)。
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