摘要：在生活文化日益增进、学习交流日益频繁的现当代，人们物质水平要求不断地被提高。城市车辆的数目与日俱增，时常造成交通堵塞、出行困难，更由于汽车对石油能源的剧烈烧占以及汽车尾气对城市污染指数和人民生活健康的危害，如何节约能源和开发利用环保、可持续的新型能源成为我们必须要解决的新兴问题。以此为契机，城市轨道客车日益受到人们的重视并得到了蓬勃的发展机遇。
目前对于交通车辆制动问题主要有两个问题。第一个问题是对于不可再生能源消耗问题。另一个便是怎样才能最好利用车辆运行制动时所产生的能量的问题。
本文基于以上两个问题提出在最合理情况下有效利用制动能量并使轻轨车辆得到最好的制动效果的方案。对于三相能馈型PWM变换器能够在特定的控制下实现能量的双向流动作出了方案研究。本文首先研究学习了三相PWM整流器的原理以及再生制动技术的基本理论知识。为了更深入的研究控制策略，分别建立了三相PWM旋转坐标下的数学模型和基于三相旋转坐标下的电流解耦控制。
在MATLAB仿真中得到了很好的控制结果，仿真证明了三相能馈型PWM整流器的研究和证明是正确的，同时也证明了在轻轨客车智能回馈系统里引入以上所有知识是正确有效地。
但在实际工况中，电网电压往往是不平衡的。还需要加入其它有效地措施来解决并推动轻轨客车的进步。
关键词：轻轨客车 PWM整流 再生制动技术 MATLAB
ABSTRACT：In the cultural life is increasingly improve， learning， and contemporary communication increasingly frequent， people material standard requirements are constantly improved. Cities the number of vehicles increases， often cause traffic jams， travel is difficult， more because the car for oil energy of severe burn in the city and car exhaust pollution index and the health and well-being of people's life， how to save energy and sustainable new energy development and utilization of environmental protection， as we must to solve emerging problems. Take this opportunity to urban rail passenger car is brought to the attention of the people and the vigorous development opportunities.
For transport vehicle braking problem there are two main problems. The first problem is to not renewable energy consumption problem. Another is how to best use the energy produced during the vehicle brake problems.
In this paper， based on the above two problems put forward under the condition of the most reasonable and effective use of light rail vehicle braking energy and get the best braking effect. For three-phase can feed type PWM converter under the control of specific realize two-way flow of energy to make a study plan. This paper study the principle of three-phase PWM rectifier as well as the basic theoretical knowledge of regenerative braking technology. In order to more in-depth study of control strategy， in established the mathematical model of three-phase PWM rotation coordinates and rotating coordinates based on the three-phase current decoupling control.
Good control results are obtained in the MATLAB simulation， the simulation proves that the three-phase can feed type PWM rectifier research and proved to be correct， also proved in railway passenger car intelligent feedback system introduced above all knowledge is correctly and effectively.
But in actual working condition， the grid voltage is often unbalanced. You also need to join other effective measures to solve and push the progress of the railway passenger car.
Keywords：light rail Train; three-phase PWM rectifier; regenerative braking; Matlab
