基于磁-固耦合振动的永磁同步电机多目标优化设计  

Multi-objective Optimization Design of Permanent Magnet Synchronous Motor Based on Magnetic-structural Coupled Vibration

作　　者：许孝卓[1,2] 刘俊哲 肖磊 蒋思远[1,2] XU Xiaozhuo;LIU Junzhe;XIAO Lei;JIANG Siyuan(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003;Henan International Joint Laboratory of Direct Drive and Control of Intelligent Equipment,Henan Polytechnic University,Jiaozuo 454003)

机构地区：[1]河南理工大学电气工程与自动化学院,焦作454003 [2]河南理工大学河南省智能装备直驱技术与控制国际联合实验室,焦作454003

出　　处：《电气工程学报》2024年第4期149-158,共10页Journal of Electrical Engineering

基　　金：国家自然科学基金(52177039);河南省科技攻关(222102220016,212102210145,222102220063);河南理工大学创新型科技团队(T2023-2);河南省高等学校重点科研(23B470002);河南省高校基本科研业务费专项(NSFRF230504)资助项目。

摘　　要：提出一种用于煤层气抽采的大长径比分数槽集中绕组永磁同步电机(Permanent magnet synchronous motor,PMSM)。在电机设计时采用磁-固耦合分析的方法,降低由于大长径比所带来的电磁振动而引起的形变过大风险。以定子槽肩高、槽开口、极弧系数、永磁体厚度、永磁体边缘厚度削减值为影响因子,转矩、效率、转矩脉动为优化目标,采用田口和响应曲面(Response surfacemethod,RSM)相结合的方法对电机进行了优化。首先基于磁-固耦合有限元(Finiteelement,FE)仿真下的振动特性确定了定子槽肩高的优化范围;然后采用田口法,建立正交试验表,对各组试验进行有限元仿真,分析各影响因子对优化目标的影响,确定永磁体厚度、极弧系数和槽开口的取值;接着采用响应曲面法继续优化,确定定子槽肩高、永磁体边缘厚度削减值的取值,从而确定电机的最终优化方案。有限元仿真结果显示,优化后电机整体性能得到了明显提升,电磁振动的形变也得到抑制。A permanent magnet synchronous motor(PMSM)with a large ratio of axial and radial dimensions as well as fractional-slot concentrated windings for mining coalbed methane is proposed.When designing the motor,an analysis method of magnetic-structural coupled is used to suppress the over-deformation risk of electromagnetic vibration due to the large ratio of axial and radial dimensions.The shoulder height of the stator,the slot opening,the pole arc coefficient,the PM thickness,and the reduction of the PM edge are selected as the influencing factors,and the torque,the efficiency,and the torque ripple are selected as the optimization objectives,a combined method of Taguchi and response surface method(RSM)is used to optimize the motor.Firstly,the optimization range of the shoulder height of the stator is determined according to the vibration characteristic of the magnetic-structural coupled finite element(FE)simulation.Secondly,an orthogonal experimental table is built by using the Taguchi method,each experiment in the table is carried out using FE simulation,and the effects on the optimization objectives of each influencing factor are analyzed to determine the values of the PM thickness,the pole arc coefficient,and the slot openings.Thirdly,the motor is further optimized using RSM to determine the values of the shoulder height of the stator and the reduction of the PM edge,then,the final optimization scheme is determined.FE results show that the overall performance of the optimized motor is improved significantly,and the deformation of electromagnetic vibration is also suppressed.

关 键 词：永磁同步电机 磁-固耦合 田口法 响应曲面法 多目标优化 

分 类 号：TM351[电气工程—电机]