中低速磁浮列车直线感应电机端部效应研究  

Research on the End Effect of Linear Induction Motor in Middle and Low Speed Maglev Train

作　　者：王滢[1] 余帆 文天琦 吴谦 WANG Ying;YU Fan;WEN Tianqi;WU Qian(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学电气工程学院,成都611756

出　　处：《微电机》2022年第9期17-21,共5页Micromotors

摘　　要：目前中低速磁浮列车一般采用单边直线感应电机作为驱动电机,电机性能在速度情况较高时受纵向动态端部效应影响较大,给列车提速带来阻碍。针对该问题,解析推导出纵向动态端部效应对电机气隙磁场影响的数学模型。提出利用电机拖尾效应增强气隙磁场的方法,基于此方法设计电机两端带有延长结构的直线感应电机结构。建立普通直线感应电机与带延长结构的直线感应电机有限元对比仿真,验证了带延长结构的直线感应电机应用于现有中低速磁浮列车时,能够有效的削弱纵向动态端部效应的影响。在相同电流密度下有更大的牵引力和更高的速度上限。为中低速磁浮列车提速提供新的方案。At present,single side linear induction motor is generally used as drive motor in medium and low speed maglev train.The performance of the motor is greatly affected by the longitudinal dynamic end effect when the speed is high,which hinders the speed increase of the train.Aiming at this problem,the mathematical model of the effect of longitudinal dynamic end effect on the air gap magnetic field of the motor was derived.A method to enhance the air-gap magnetic field of the motor by using the motor trailing effect was proposed.Based on this method,the linear induction motor structure with extended structure at both ends of the motor was designed.The finite element comparative simulation of the ordinary linear induction motor and the linear induction motor with extended structure was established,which verified that the linear induction motor with extended structure can effectively weaken the influence of the longitudinal dynamic end effect when it is applied to the existing medium and low speed maglev train.At the same current density there is greater traction and higher speed limit.It provides a new scheme for speeding up the medium and low speed maglev train.

关 键 词：直线感应电机 纵向动态端部效应 气隙磁场 带延长结构的直线感应电机 

分 类 号：TM346[电气工程—电机] TM359.4