高速磁浮轨道长定子铁心片间短路故障的研究  

Research on short circuit fault between long stator core pieces of high-speed maglev track

作　　者：罗茹丹 吴峻[1] 张云洲[1] LUO Rudan;WU Jun;ZHANG Yunzhou(College of Intelligent Science,National University of Defense Technology,Changsha 410073,China;Ningbo CRRC Times Transducer Technology Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]国防科技大学智能科学学院,湖南长沙410073 [2]宁波中车时代传感技术有限公司,浙江宁波315000

出　　处：《铁道科学与工程学报》2021年第4期853-860,共8页Journal of Railway Science and Engineering

基　　金：十三五国家重点研发计划项目(2016YFB1200602-40)。

摘　　要：针对搭载式高速磁浮轨道综合检测系统拟采用磁场检测方法实现长定子铁心片间短路故障检测的需求,建立长定子与悬浮电磁铁的二维和三维涡流场模型。综合车辆运行姿态的变化,分析研究铁心片间短路故障时长定子牵引行波主漏磁场的表现和规律。研究结果表明:片间短路造成的涡流既影响行波主漏磁场叠片方向分量的对称性,也削弱行波主漏磁场垂向分量,其衰减约为20~300 Gs;电磁铁的悬浮漏磁场沿车辆运行方向呈指数衰减,距离电磁铁200 mm以外的行波主漏磁场不受影响;车辆悬浮与导向波动影响搭载式磁场检测的结果,其变化范围为±75 Gs,车辆侧滚及俯仰变化对搭载式磁场检测影响较小。这些结果为利用行波主漏磁场的变化实现非接触地快速检测定位铁心片间短路故障提供了理论依据。Aiming at the requirement of the mounted high-speed maglev track comprehensive detection system to use magnetic field detection methods to detect short-circuit faults between long stator core pieces,two-dimensional and three-dimensional eddy current field models of long stators and suspended electromagnets were established to integrate changes in vehicle operating attitudes.The behavior and law of the main leaked magnetic field of the long stator traction traveling wave during the short-circuit fault between the core pieces were analyzed and studied.The simulation shows that the eddy current caused by the inter-chip short circuit not only affects the symmetry of the lamination direction component of the traveling wave main leaked magnetic field,but also weakens the vertical component of the traveling wave main leaked magnetic field,and its attenuation is about 20~300 Gs;The running direction of the vehicle is exponentially attenuated,and the main leaked magnetic field of the traveling wave 200 mm away from the electromagnet is not affected;the vehicle’s suspension and guidance fluctuations affect the result of the mounted magnetic field detection,and its variation range is±75 Gs.The vehicle roll and pitch change have little influence on mounted magnetic field detection.These results provide a theoretical basis for the rapid non-contact detection and location of this type of faults using the change of the main leaked magnetic field of the traveling wave.

关 键 词：高速磁浮轨道 长定子铁心 片间短路 电磁场分析 有限元 

分 类 号：TM341[电气工程—电机]