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1 问题的提出 我段现在京山、京九、京原线使用的是大连机车车辆厂和资阳内燃机车厂生产的“44”字头和“50”字头东风4Ｃ型机车,1997年配属我段,共30台。该型机车取消过渡装置,装用数字量隔离模块(以下简称ＳＭＱ),供给光电速度传感器15Ｖ电源,并获取速度信号传送给励磁调
1 Problems I paragraph now Jingshan, Beijing-Kowloon, Beijing-Yuanjiang line is used in Dalian Locomotive Works and Ziyang Diesel Locomotive Factory production of “44” prefix and “50” prefix Dongfeng 4C locomotive, in 1997, me, A total of 30 units. The locomotive cancel the transition device, equipped with digital isolation module (hereinafter referred to as SMQ), 15V photoelectric speed sensor power supply, and access to the speed signal excitation excitation