直线电机地铁车辆牵引系统国产化应用研究

为解决国内直线电机(LIM)轨道交通牵引传动系统关键技术及备品备件完全依赖进口、维修维护困难、车辆运营成本高的现状,研究开发了具有完全自主知识产权的大功率强迫风冷式LIM牵引变流器系统。针对LIM特殊结构引起的边端效应等问题对传统间接磁场定向矢量控制方式进行了优化。考虑到LIM次级时间常数发生变化对磁场定向的影响,导致转矩控制性能下降,提出了一种基于最小电流的参数在线辨识方法。所提方法计算简单、不依赖于电机其他参数,试验台测试结果证明了该算法的准确性和有效性。在地铁实际运营线路的试验结果表明,国产化牵引变流器各项性能满足车辆技术要求,而且效率等部分指标优于原车进口牵引系。

Localization Research on LIM Traction System of Subway Vehicle

Aiming at problems that the critical techniques and vehicle spare parts completely dependent on import in domestic rail transit of linear induction motor (LIM) traction drive, as well as the difficulties of repair maintenance, and the high costs of vehicle operation, a highpower, forced aircooled LIM traction converter system was researched and developed with completely independent intellectual property rights. Against the end effect and other problems caused by the special structure of LIM, an optimal scheme of indirect fieldoriented vector control was proposed. And the change of LIM secondary time constant had a great influence on the fieldoriented control, which results in torque performance degradation. Therefore an online parameter identification method based on the minimum current was presented. It had advantages of simple calculation and not relying on other motor parameters. Experiment results of test bench demonstrate the accuracy and validity. The experiments results in an actual operation subway line showed that the performance of localization traction converter fully meets the vehicle technical requirements. And some indicators such as efficiency were even better than the imported one.