交流传动机车的发展 交流电动机与直流电动机相比,具有结构简单、维护少、功率大、效率高、体积小、重量轻、可靠性高等诸多优点,所以在铁路机车上采用交流牵引电动机取代直流牵引电动机,是各国铁路工程师梦寐以求的目标。 早在1903年,德国西门子公司就造出了一台装有三相交流电机的机车,且最高试验时速达到了210公里,但在当时的条件下,无法实现在机车上进行变频率、变电压,而是通过牵引变电站引出的三根供电导线向机车提供可变频率、可变电压的三相交流电。这不仅使控制困难,应用不便,而且工程耗资巨大, The development of AC locomotive AC motor and DC motor compared with simple structure, less maintenance, high power, high efficiency, small size, light weight, high reliability and many other advantages, so the use of AC traction motors in railway locomotive instead of DC traction Motor, is the dream of railway engineers all over the world. As early as 1903, Siemens of Germany built a locomotive fitted with a three-phase AC motor and the maximum test speed reached 210 km / h, but under the conditions of the time, it was impossible to carry out variable frequency, variable voltage, Instead, the three power supply leads from the traction substation provide the locomotive with three-phase alternating current of variable frequency and variable voltage. This not only makes the control difficult and inconvenient to use, but also the project costly,