5KW机器已做好,48V150A输入,现在就是保护电路不如意:如果额定工作电流100A,要上到150A以上保护才会动作,如要100A电流动作时,只能在约20A电流工作,如果把工作电流调大些,一开机就会保护.就是整定电流与动作电流相差太大了,不管取样在前级、后级都一样,请教各位如何解决?我是用下面的图
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