电磁发射用永磁同步直线电机磁场解析及推力波动优化  

Magnetic Field Analysis and Thrust Fluctuation Optimization of Permanent Magnet Synchronous Linear Motor for Electromagnetic Launch

作　　者：贾光勇 孙兆龙 黄垂兵 周炜昶 卯寅浩 雷招然 JIA Guangyong;SUN Zhaolong;HUANG Chuibing;ZHOU Weichang;MAO Yinhao;LEI Zhaoran(School of Electrical Engineering,Naval University of Engineering,Wuhan 430033,Hubei,China)

机构地区：[1]海军工程大学电气工程学院,湖北武汉430033

出　　处：《兵工学报》2024年第7期2159-2170,共12页Acta Armamentarii

基　　金：国家自然科学基金项目(52077218)。

摘　　要：针对电磁发射用永磁同步直线电机的磁场解析及推力波动优化问题,建立单边发射电机磁场解析模型,利用矢量磁位及边界条件,分别对次级Halbach永磁阵列及初级六相绕组磁场进行解析,得到气隙磁场分布,进而建立单边发射电机主要结构参数与电磁推力间的函数关系。选取永磁阵列极弧系数及厚度、初级绕组宽度及厚度4个参数作为优化变量,利用遗传算法寻找设计变量的最优组合,使发射电机单边电磁推力波动最小化。分析结果表明:磁场解析结果精度较高,电磁推力计算误差满足工程分析的需要;优化后的单边发射电机平均推力提升1.21%,峰均力比下降62.688%,通过解析及仿真结果的对比验证了理论推导的正确性及优化方法的合理性。The magnetic field analysis and thrust fluctuation optimization of a permanent magnet synchronous linear motor for electromagnetic launch are performed by establishing an analytical model of the magnetic field of a single-sided motor for electromagnetic launch.The magnetic fields of the secondary Halbach permanent magnet array and the primary six-phase winding are analyzed to obtain the air-gap magnetic field distribution by using the vector magnetic potential and boundary conditions,and then the functional relationship between the electromagnetic thrust and the main structural parameters of single-sided motor is established.The pole arc coefficient and thickness of permanent magnet array,and width and thickness of primary winding are selected as optimization variables,and the optimal combination of design variables is found by using genetic algorithm to minimize the ripple of the unilateral electromagnetic thrust of single-sided motor.The analysis shows that the accuracy of magnetic field analysis results is high,and the calculation error of electromagnetic thrust meets the needs of engineering analysis.The average thrust of the optimized single-sided motor is increased by 1.21%,and the peak-to-average force ratio is decreased by 62.688%.The correctness of theoretical derivation and the rationality of the optimization method are verified by comparing the analyzed and simulated results.

关 键 词：永磁同步直线电机 电磁发射 磁场解析 推力计算 推力波动 

分 类 号：TM359.4[电气工程—电机]