Ac traction gets on track
Ac traction gets on track
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交流牵引步入正轨
作者：
L. O'Connor
本文描述了基于逆变器的交流牵引系统，它给货运机车更大的附着力、牵引力和制动能力。在20世纪40年代，直流牵引取代了蒸汽机作为火车推进的来源，从那时起它就统治了货运行业。但现在，高性能的交流牵引系统，以其前所未有的拉力和附着力，在美国的货运铁路上变得越来越普遍。在数千英里的演示测试中，今天的交流牵引系统已经优于传统的直流电机驱动系统。大型铁路公司对交流牵引的好处深信不疑，并将其集成到他们的货运机车中。
This article describes inverter-based ac traction systems which give freight locomotives greater adhesion, pulling power, and braking capacity. In the 1940s, dc traction replaced the steam engine as a source of train propulsion, and it has ruled the freight transportation industry ever since. But now, high-performance ac-traction systems, with their unprecedented levels of pulling power and adhesion, are becoming increasingly common on America`s freight railroads. In thousands of miles of demonstration tests, today`s ac-traction systems have outperformed traditional dc-motor driven systems. Major railroad companies are convinced enough of the benefits of ac traction to have integrated it into their freight locomotives.