现代内燃机车采用交-直流电力传动,用三相或六相桥式线路将交流电整流。由于牵引电动机额定电压通常不超过750V,因此牵引传动整流器每臂中的二极管不必串联即可正常工作。但是,为了保持内燃机车电力传动能在任一个二极管损坏时继续工作,可以考虑整流装置每臂并联支路中用两个二极管串联的储备方法(图1)。 Modern diesel locomotive using AC - DC power transmission, with three-phase or six-phase bridge rectifier AC power line. Since traction motors typically have a nominal voltage of no more than 750V, the diodes in each arm of the traction drive rectifier do not need to be connected in series for normal operation. However, in order to keep the electric drive of a diesel locomotive running on the failure of any one of the diodes, a reserve method using two diodes in series in each parallel arm of the rectifier can be considered (Fig. 1).