蓄電池充電機反饋回路開路
2019/4/25 9:41:43??????點擊：
如果蓄(xu)電(dian)(dian)池充(chong)電(dian)(dian)機變壓器(qi)(qi)次級(ji)的(de)電(dian)(dian)壓反饋(kui)回路(lu)開(kai)路(lu)，即分壓電(dian)(dian)阻(zu)開(kai)路(lu)，反饋(kui)電(dian)(dian)壓不能輸(shu)(shu)入(ru)(ru)(ru)ＰＷＭ脈(mo)寬調制(zhi)芯片(pian)(pian)輸(shu)(shu)入(ru)(ru)(ru)腳，或者(zhe)初級(ji)線圈(quan)電(dian)(dian)流過大，脈(mo)寬調制(zhi)芯片(pian)(pian)SG3525過流保護(hu)工作，或者(zhe)光耦合(he)器(qi)(qi)PC817故(gu)障，SG3525的(de)輸(shu)(shu)出脈(mo)沖信(xin)號(hao)不能送到專用驅動(dong)芯片(pian)(pian)IR2110，都會使(shi)輸(shu)(shu)出電(dian)(dian)壓為(wei)零。檢測思路(lu)：先(xian)查反饋(kui)分壓電(dian)(dian)阻(zu)各(ge)點電(dian)(dian)壓。如果正常(chang)(chang)，再(zai)查SG3525的(de)輸(shu)(shu)出引腳，如果蓄(xu)電(dian)(dian)池充(chong)電(dian)(dian)機輸(shu)(shu)出脈(mo)沖信(xin)號(hao)正常(chang)(chang)，再(zai)查IR2110輸(shu)(shu)入(ru)(ru)(ru)信(xin)號(hao)。若(ruo)IR2110輸(shu)(shu)入(ru)(ru)(ru)異常(chang)(chang)，則(ze)可能是光耦合(he)器(qi)(qi)PC817故(gu)障，更(geng)換(huan)同型號(hao)光耦。若(ruo)前(qian)面檢測都正常(chang)(chang)，再(zai)查IR2110的(de)兩(liang)個脈(mo)沖輸(shu)(shu)出信(xin)號(hao)，如果發現異常(chang)(chang)，則(ze)是驅動(dong)芯片(pian)(pian)故(gu)障，更(geng)換(huan)芯片(pian)(pian)。
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