基于参数优先级划分的飞轮电机多目标优化  

Multi-Objective Optimization for Flywheel Motors Based on Parameter Priority Division

作　　者：张维煜[1] 李凯 杨鑫 ZHANG Weiyu;LI Kai;YANG Xin(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《西南交通大学学报》2023年第4期922-932,共11页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金(52077099)。

摘　　要：为改善电机转矩性能,同时降低永磁材料成本,首先,根据飞轮电池的运行模式,提出飞轮电机的设计要求,并选取输出转矩、转矩脉动和永磁体用量为设计目标;在此基础上,采用等效磁路法和有限元法计算电机的主要尺寸和性能,同时确定合适的槽极配合以及初始结构参数;其次,使用相关系数法分析该电机各结构参数与优化目标之间的相关性,并合理划分转子尺寸和定子尺寸的优先级;最后,采用有限元代理模型和多目标优化算法(非支配排序遗传算法Ⅱ,NSGA-Ⅱ)相结合的方法对设计参数进行逐级寻优,并通过场路联合仿真和样机实验进行验证.研究结果表明:采用参数优先级划分的方式可以减少优化过程中数据点的采样,缩短了整个过程中有限元分析的时间;优化后,电机反电势梯形化程度更高,转矩脉动减小了40%,永磁体用量降低了8%.This paper aims to improve the torque performance of a flywheel motor and reduce its permanent magnet cost.Firstly,according to the operating mode of the flywheel battery,the design requirements of the flywheel motor were proposed,and the output torque,torque ripple,and consumption of permanent magnets were selected as the design objectives.On this basis,the equivalent magnetic circuit method and finite element method were used to calculate the main size and performance of the motor,and the appropriate number of slots and poles and initial structural parameters were determined.Secondly,the correlation coefficient method was utilized to analyze the correlation between the structural parameters of the motor and the optimization objectives,and the priority of rotor sizes and stator sizes was divided reasonably.Finally,the finite element surrogate model and the multi-objective optimization algorithm,namely the non-dominated sorting genetic algorithmⅡ(NSGA-Ⅱ)were used to optimize the design parameters step by step,and the correctness of optimization results was verified by the field-circuit co-simulation method and prototype experiment.The results show that the proposed method of parameter priority division can reduce the sampling of data points in the optimization process and shorten the time of finite element analysis in the whole process.After optimization,the back electromotive force of the motor is more trapezoidal.The torque ripple is reduced by 40%,and the consumption of permanent magnets is reduced by 8%.

关 键 词：飞轮电池 永磁同步电机 参数优先级划分 多目标优化 

分 类 号：TM30[电气工程—电机] TP18[自动化与计算机技术—控制理论与控制工程]