东风型或东风3型内燃机车由于起动电流过大,牵引客车运行时,列车冲动很厉害,这与旅客列车平稳起动的要求不相适应。针对这个问题,乘务员最初学习兄弟段采用机车抱小闸起动的方法,但经过运用发现,牵引电动机整流子沿电刷对称位置因抱闸起动严重烧黑。后来经过实践摸索,认为将励磁电路中的平稳起动电路稍稍改动一下就可以解决这个问 Dongfeng or Dongfeng type 3 diesel locomotive due to the starting current is too large, pulling the bus running, the train impulse is very powerful, which does not meet the requirements of smooth start passenger trains. In response to this problem, the flight crew initially studied the method of using the locomotive to hold the small gate in the fraternal section. However, it was found through application that the traction motor commutator severely burned black due to the starting of the brake along the symmetrical position of the brush. Later, after practicing groping, that the smooth start circuit in the excitation circuit can be slightly changed to solve this question