次级非中心位置工况双边直线电动机有限元分析  

Analysis for Double-Side Linear Induction Motor with Secondary Non-Center Position

作　　者：吕刚[1] 陈玫志 杨镜 曾迪晖[1] 周桐[1] Lü Gang;CHEN Mei-zhi;YANG Jing;ZENG Di-hui;ZHOU Tong(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《微特电机》2020年第4期28-31,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51777009,51377009)。

摘　　要：在理想工况下双边型直线感应电机运行时,次级处于电机中心位置,由于曲线行程和振动等原因,初级会发生不同程度的横向偏移导致次级偏离中心位置,从而电机力特性发生较大变化。通过建立短初级双边型直线感应电机三维解析模型,给出了直线感应电机的数值计算方法和边界条件,获得初级不同偏移程度下直线电动机推力和法向力的表达式。对该工况下的直线感应电机进行三维有限元仿真,得到不同偏移程度下气隙磁场、推力和法向力的特性,分析了同一偏移下频率对非磁性次级电机的磁场和法向力影响。结果表明,随着初级偏移程度不断增大,气隙磁场的磁感应强度略有下降,而抑制偏移的法向力和推力逐渐增大。Under ideal conditions,when the double-sided linear induction motor is running,the secondary is at the center of the motor. Due to the influence of curve stroke vibration and other external disturbances,the primary will have different degrees of displacement. At this time,the secondary deviation from the center position causes a large change in the motor force characteristics. By establishing a 3D analytical model of a short primary double-sided linear induction motor,the numerical calculation method and boundary conditions of the linear induction motor were given. The 3D finite element simulation of the linear induction motor under this condition was carried out to obtain the characteristics of air gap magnetic field,thrust and normal force at different displacement. The analysis showed that as the primary displacement increased,the magnetic field strength of the air gap magnetic field decreases slightly,while the normal force and thrust to suppress the displacement increases gradually.

关 键 词：直线感应电机 双边型 三维有限元仿真 横向偏移 推力 法向力 

分 类 号：TM346[电气工程—电机] TM359.4