从 多年下矿收集煤矿机电运输工作资料中看出 ,电机车在机电运输设备中发生故障比较频繁 ,而电机车的直流串激电动机故障则更为棘手 ,尤其是直流电枢绕组 ,一旦发生绝缘损坏或匝间短路 ,就难以查找故障点 ,即使修理好后也很难恢复其原有技术状态 ,为此 ,煤矿企业往往需耗资大量 From many years mine to collect mine mechanical and electrical transport work shows that the electric car in the mechanical and electrical transportation equipment failure occurs more frequently, and electric locomotive DC series motor fault is more tricky, especially the DC armature winding, in the event of insulation damage Or inter-turn short circuit, it is difficult to find the point of failure, even after repair is difficult to restore its original state of technology, for which, coal mining companies often need to spend a lot