8K机车GTO逆变器的现场试验分析及改进意见

Field test and improvements for GTO inverters on 8K electric locomotive

具体分析了８Ｋ机车辅助变流装置的试验数据和波形，主要内容包括ＧＴＯ元件的过电压、电流，以及系统的干扰屏蔽和温升等情况，还分析了该辅助变流系统的不足之处，诸如ＧＴＯ容量偏紧，缺少短路保护装置，门极驱动存在缺陷，并提出了改进意见．

Specific analysis is made on test data and wave form of auxiliary converters on 8K electric locomotive, i. e. over voltage & current for GTO device, disturbance shielding and temperature rise for the whole system, etc. Besides, defects of the auxiliary converters are presented, including GTO capacity limit,lack of short circuit protection, and defects on gate drive unit. Suggestions for improvement are also put forward accordingly.