磁路互补型横向磁通切换直线电机电磁推力计算与特性分析  

Analysis of Electromagnetic Thrust Characteristics of Magnetic Circuit Complementary Transverse Flux Switching Linear Motor

作　　者：付东山[1] 吴康伊 郑萍[2] 王祥瑞 伍小杰[1] Fu Dongshan;Wu Kangyi;Zheng Ping;Wang Xiangrui;Wu Xiaojie(School of Electrical Engineering China University of Mining and Technology,Xuzhou 221116 China;School of Electrical Engineering and Automation Harbin Institute of Technology,Harbin 150001 China)

机构地区：[1]中国矿业大学电气工程学院,徐州221116 [2]哈尔滨工业大学电气工程及自动化学院,哈尔滨150001

出　　处：《电工技术学报》2022年第22期5717-5727,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金国家重大项目课题(51991385);江苏省研究生科技与实践创新计划(SJCX22_1173)资助。

摘　　要：有铁心永磁直线电机由于齿槽、边端效应及电枢电流谐波等,不可避免地会产生较高的电磁推力波动,电磁推力波动直接影响直线电机运行精度和平稳性。该文对具有磁路互补特征的横向磁通切换直线电机展开电磁推力特性研究,通过等效磁路法分析其磁场分布规律,得出该电机次级具有等磁位的电磁特性;基于气隙磁动势-磁导分析方法,揭示互补磁路条件下,该有铁心电机消除齿槽推力波动,实现有铁心电机无齿槽效果的机理;基于该电机磁场分布特征,建立其许-克变换气隙磁场计算模型,提出定位力、电枢绕组磁阻力及永磁推力等电磁推力快速准确的计算方法,获得该电机各电磁推力特性;对样机进行了空载感应电动势和电磁推力的测试实验,对比实验和仿真结果,验证了理论分析模型及计算方法的有效性和准确性。Owing to cogging effect,end effect and armature current harmonic,the high electromagnetic thrust ripple is inevitable in permanent magnet linear motor with an iron core,which directly influences the accuracy and smoothness of a linear machine in operating.This paper studies the electromagnetic thrust characteristics based on a flux-switching transverse flux permanent magnet linear motor with a complementary magnetic circuit.Firstly,the magnetic field distribution is analyzed by the equivalent magnetic road method,and the electromagnetic characteristics of the equal magnetic potential in the secondary of the motor are verified.Secondly,based on the air-gap magnetomotive force-permeability analysis method,the cogging thrust is suppressed under the complementary magnetic circuit condition,which realizes the non-cogging effect in the permanent magnet linear motor with the iron core.Then,the Schwarz-Christoffel transform model is proposed to analyze the electromagnetic thrust characteristics based on the air-gap magnetic felid distribution,and an analytical expression of electromagnetic thrust is derived.At last,experiments about no load-induced electromotive force and electromagnetic thrust are carried out to verify the proposed theoretical analysis model.

关 键 词：直线电机 横向磁通 磁通切换 磁路互补 电磁推力 许-克变换 

分 类 号：TM359.4[电气工程—电机]