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80A输出,精度为0.2A,达到了千分之2.5,要求还是比较高的。如果用电阻(分流器)采样的话,要求阻值不能太小,不然精度达不到,大电流下损耗也比较大。
如果对成本要求不高,试试霍尔,,控制也简单,再做一个继电器,或者电子开关,到达你的限定值就断开就可以了