一、交流发电机维修 一辆日野大客车发动机运转时,发电机有“唔唔”异响。在夜间打开大灯开关时,电流表指示针放电,如断开电机磁场连接线时,响声消失。经用万用表检测,系电机定子绕组相间短路所致。原因是定子绕组绝缘层老化。定子绕组感应电流自成回路,发出了“唔唔”(涡流)声,此时输出功率明显 First, the alternator maintenance A Hino bus engine running, the generator has a “Wu Wu” abnormal sound. When the headlight switch is turned on at night, the ammeter indicator discharges, such as when the motor magnetic field cable is disconnected, the sound disappears. After testing with a multimeter, the motor stator winding phase short circuit caused. The reason is the aging of the stator winding insulation. Stator winding induction current self-loop, issued a “Wu Wu” (eddy current) sound, then the output power significantly