一台24伏交流发电机装车运行时,电流表指示不充电,就用试灯分别接交流机的电枢和搭铁接柱,加大油门,试灯发红,说明发电量小。经车上检查。调节器是好的．线路连接也良好．皮带松紧正常。因此,判断故障在发电机。于是, 拆下发电机检查,六个二极管的正、反向电阻值都在规定范围内,电枢绕组无破损、断路,两滑环间的电阻值21欧姆,属正常值。 When a 24 V alternator is loaded and running, the ammeter indicates no charge. Connect the test lights to the armature and ground tie bars of the alternator, increase the throttle, and the test light turns red, indicating that the power generation is small. After the car check. Regulator is good. The connection is good. Elastic belt normal. Therefore, judge the fault in the generator. So, remove the generator check, the six positive and negative diode resistance values ​​are within the specified range, the armature winding without damage, open circuit, the resistance between the two slip rings 21 ohms, is a normal value.