一、劈相机起动的特点异步劈相机是交流电力机车上辅助电路中的单一三相变换装置。多年来,在韶山Ⅰ型电力机车上使用的劈相机经常发生烧损事故,其事故又多半是发生在起动过程中。其中一种情形是由于分相起动电阻不能正常接入,使劈相机失去起动力矩,导致定子绕组单相通电过载而烧损;第二种情况是频繁的起动,特别是高网压下的频繁起动,使劈相机定子绕组流过很大的起动电流造成对定子线圈间的很大的热、电、及机械力冲击,有可能加速导线绝缘局部损坏最后导致诸如匝间击穿、短路、接地等内部故障。对于前一种因 First, the characteristics of the split-camera start-up Asynchronous split-phase AC camera is auxiliary power locomotive circuit in a single three-phase conversion device. Over the years, shaoshan Ⅰ type electric locomotives used in the split-phase camera often burn accident occurred, and most of the accidents occurred in the starting process. One of the situations is that the phase-split starter resistor can not be normally connected, so that the split-phase camera loses the starting torque, resulting in over-loading of the stator windings and burning. The second condition is frequent starting, especially under high network pressure Start, so that the chopper camera stator winding flow through a large start-up current caused by the stator coil between the great thermal, electrical and mechanical impact, it may speed up the local insulation wire damage eventually led to such as inter-turn breakdown, short circuit, ground Other internal problems. For the former cause