中速磁悬浮列车分段式长定子永磁直线同步电机牵引控制策略  

Traction Control Strategy of Segmented Long Stator Permanent Magnet Linear Synchronous Motor for Medium-Speed Maglev Train

作　　者：赵牧天 葛琼璇[1] 朱进权 王晓新[1] 王珂[1,2] Zhao Mutian;Ge Qiongxuan;Zhu Jinquan;Wang Xiaoxin;Wang Ke(Key Laboratory of Power Electronics and Electric Drive Institute of Electrical Engineering Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电工研究所中国科学院电力电子与电气驱动重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《电工技术学报》2022年第10期2491-2502,共12页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划高速磁浮交通系统关键技术研究课题资助项目(2016YFB1200602-19)。

摘　　要：采用分段式长定子永磁直线同步电机牵引的中速磁悬浮列车在定子段换步时,相邻定子段绕组交链的永磁磁链的改变会导致牵引力损失,除此以外,在牵引过程中,馈电电缆长度的增加使得电机漏阻抗增大,在变流器供电容量的限制下,列车无法在试验线中完成全速度运行。该文首先建立含有定子段换步的长定子永磁直线同步电机数学模型,在此基础上,提出全速度运行的换步控制策略,以及适用于该电机的弱磁控制策略。该策略对q轴电流实时分配,保证在换步区间相邻定子段的q轴电流均跟随参考值;利用电机端电压计算得到d轴电流参考值,使电机在id=0控制和弱磁控制两种工况之间平滑切换。通过硬件在环实验,验证了采用所提策略可在线路长度和变流器容量限制下,实现列车全速度运行,并消除电机在定子段换步时的牵引力损失。Medium-speed maglev train is driven by the segmented long stator permanent magnet linear synchronous motor(LS-PMLSM),the change of the permanent magnet flux linkage of the adjacent stator windings will lead to the loss of traction during a changeover.Besides,the increase of the length of the feeder cable in the traction process will increase the leakage impedance of the motor.Under the limitation of the converter’s power supply capacity,the train cannot run at full speed in the test line.In this paper,the mathematical model of LS-PMLSM with stator segment changeover is established.On this basis,the changeover strategy at full speed and the flux weakening control strategy suitable for the motor are proposed.The strategy allocates the q-axis current in real-time to ensure that the current of adjacent stator segments in a changeover period follows the reference value.The d-axis reference current is calculated by the motor terminal voltage,which can make the motor smoothly switch between id=0 and flux weakening control.Through the Hardware-in-the-Loop experiment,it is verified that the strategy can realize the full speed operation under the constraints of the line length and converter capacity,and eliminate the traction loss of the motor during the stator segment changeover.

关 键 词：中速磁悬浮列车 长定子永磁直线同步电机 定子段换步 弱磁控制 硬件在环 

分 类 号：TM359.4[电气工程—电机]