基于模态分析的双定子电励磁场调制电机弹性模量调整方法  

The Elastic Modulus Adjustment Method of Double-Stator Electric-Excitation Field-Modulated Machine Based on Modal Analysis

作　　者：宋春同 王玉彬[1] Song Chuntong;Wang Yubin(College of New Energy China University of Petroleum(East China),Qingdao 266580 China)

机构地区：[1]中国石油大学(华东)新能源学院,青岛266580

出　　处：《电工技术学报》2024年第6期1713-1724,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(52130706)。

摘　　要：准确获得电机结构的模态分析结果是研究电磁噪声的前提条件。该文以一台双定子电励磁场调制电机为研究对象,首先,利用有限元软件对影响其模态分析的弹性模量展开研究,探索弹性模量变化对各阶固有频率的相对影响率大小,找到外定子、电枢绕组、机壳和端盖的弹性模量变化对模态分析结果的影响规律,由此明确参数调整的方向性。然后,采用锤击法进行模态实验,并获得外定子、外定子组件以及整机模态实验结果与仿真结果二者误差的大小。最后,根据二者误差大小及参数调整的方向性,选择合适的弹性模量调整值将其误差均调整到4%以内,从而得到精确的模态仿真结果,进而有利于后续该电机电磁噪声的分析。Modal analysis is an important part of motor vibration and noise analysis.To accurately obtain the results of motor modal analysis,it is necessary to assign corresponding elastic modulus parameters to the stator,armature winding,casing,end cover,and other structures.When the structural material is determined,its elastic modulus is also determined.Analytical and finite element calculations are based on ideal conditions,and there is often a significant error between the calculated and actual results based on the determined elastic modulus.The structure of the entire machine model,such as the casing and end cover,greatly affects the stator modal.For a finite element model,adjusting anisotropic parameters like the stator core and winding is necessary.At this stage,the determination of the elastic modulus of the motor structure is mainly done through modal experiments to adjust the parameters of the simulation results.Their errors converge to a reasonable error range.Although this method can obtain stator modal analysis results with high accuracy,the influence of parameter adjustment on each order of natural frequencies is not linear.Suppose its directionality cannot be clearly pointed out,it is difficult to adjust the parameters of the stator assembly and the entire machine.As a result,adjusting the errors of each order is difficult.Therefore,a double-stator electric-excitation field-modulated machine is taken as the research object.First,the initial values of the material parameters of each structure are determined,and the elastic modulus that affects its modal analysis is studied using finite element software.The relative influence rate of the elastic modulus changes in the outer stator,armature winding,casing,and end cover on each order of natural frequency is observed.According to the value relationship between elastic modulus,distinct adjustment methods were identified:three for the outer stator,four for the armature winding,and singular for the casing and end cover,thereby clarifying the directionality of elast

关 键 词：双定子电励磁场调制电机 有限元模态分析 弹性模量调整规律 模态实验 

分 类 号：TM356[电气工程—电机]