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1 故障现象1 997年 6月 1 6日 ,兖州机务段DF4 型 72 31机车第 4次辅修。据反映 ,该机车最近一段时间以来 ,反向前进时 ,相对于其它 4台牵引电动机 ,5D电流低 ,6D电流高 ,两者相差很大 ;而正向前进时 ,6台牵引电动机的电流均正常。2 分析及处理对于直流电动机来说 ,正转与反
1 fault phenomenon 1 June 16, 997, Yanzhou Locomotive Depot DF4 72 31 locomotive the fourth minor repair. According to the report, compared with the other four traction motors, the 5D current is low and the current of 6D is high, the difference between the two is quite large when the locomotive reverses forward in the recent period. When the motor is traveling forward, the current of the six traction motors normal. 2 Analysis and Processing For the DC motor, forward and reverse