无铁芯永磁同步直线电机温升特性与定位精度研究  

Research on Temperature Rise Characteristics and Positioning Accuracy of Ironless Core Permanent Magnet Synchronous Linear Motors

作　　者：梅智发 朱继元 卢飞泉 代宣军[1] MEI Zhifa;ZHU Jiyuan;LU Feiquan;DAI Xuanjun(Key Laboratory of Advanced Manufacturing and Automation Technology,Guilin University of Technology,Guilin 541006,China)

机构地区：[1]桂林理工大学广西高校先进制造与自动化技术重点实验室,桂林541006

出　　处：《组合机床与自动化加工技术》2025年第4期78-82,86,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：广西科技重大专项项目(2022AA05002)。

摘　　要：针对双轴直线电机模组工作时温度升高导致定位误差增大的问题,通过计算导热系数、等效比热容及对流换热系数等,确定无铁芯永磁同步直线电机温度场仿真分析所需热参数。将绕组损耗作为温度场热源,经电磁场-温度场-结构场的耦合仿真分析,得到仿真模型的稳态温度与热变形。对关键零件移动台和大理石底板的取点温升和变形量采用最小二乘法拟合,得到相对应曲线函数。通过实验获得两零件实际温度,与仿真结果相比,相对误差分别为3.42%和9.45%,温升后直线电机的定位误差增加17.311μm。实验结果表明温度对定位精度有较大影响。分析和仿真方法能为后续双轴直线电机模组改良提供指导。Aiming at the problem of increasing positioning error due to the temperature rise during the working of the biaxial linear motor module,the thermal parameters required for the simulation analysis of the temperature field of the ironless core permanent magnet synchronous linear motor are determined by calculating the thermal conductivity,the equivalent specific heat capacity and the convective heat transfer coefficient.The winding loss is taken as the heat source of the temperature field,and the steady state temperature and thermal deformation of the simulation model are obtained through the coupled simulation analysis of electromagnetic field-temperature field-structure field.The temperature rise and deformation of the key parts,the moving table and the marble base plate,are fitted by the least-squares method to obtain the corresponding curve functions.The actual temperatures of the two parts are obtained through experiments,and compared with the simulation results,the relative errors are 3.42%and 9.45%,respectively,and the positioning error of the linear motor increases by 17.311μm after the temperature rise.The experimental results show that the temperature has a large impact on the positioning accuracy.The analysis and simulation method can provide guidance for the subsequent improvement of the dual-axis linear motor module.

关 键 词：无铁芯永磁同步直线电机 温度场 耦合仿真 定位精度 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]