故障现象之一:开始时出现电流表指示充电,但电流小、且不稳定,直至完全不充电。 故障原因:因交流机定子绕组绝缘老化,使绕组匝间漏电,击穿短路而造成不发电。 故障分析:拆开发电机,发现电枢绕组积垢严重。由于定子绕组积垢严重造成散热不良,引起定子绕组温升超过绝缘漆的耐热能力,使绝缘漆迅速老化。老 One of the symptoms of failure: The beginning of the ammeter appears to indicate charging, but the current is small, and unstable, until completely non-charged. Fault reason: AC stator winding insulation aging, the inter-turn winding leakage, breakdown caused by short circuit and not power generation. Failure Analysis: Disassemble the generator, armature winding found serious scale. As a result of serious stator winding fouling caused by poor cooling, causing the stator winding temperature exceeds the insulation resistance of the insulating paint, so that the rapid deterioration of insulating paint. old