超高速磨削电主轴磁热耦合分析  

Magneto-thermal coupling analysis of ultra-high speed grinding electric spindle

作　　者：梅俊伟 刘保国[1,2] 冯伟 MEI Junwei;LIU Baoguo;FENG Wei(College of Mechanical and Electrical Engineering,Henan University of Technology,Zhengzhou 450001,CHN;Henan Key Laboratory of Super Hard Abrasives Grinding Equipment,Zhengzhou 450001,CHN)

机构地区：[1]河南工业大学机电工程学院,河南郑州450001 [2]河南省超硬磨料磨削装备重点实验室,河南郑州450001

出　　处：《制造技术与机床》2021年第5期134-138,共5页Manufacturing Technology & Machine Tool

基　　金：NFSC-河南联合基金重点项目(U1604254);河南省高等学校重点科研项目(20A460007);湖南省重点实验室开放基金项目(E21850);河南省高等学校重点科研项目(19A460015)。

摘　　要：磨削电主轴高速运行时内置电机温升较大,对其工作性能将产生严重影响。以超高速磨削电主轴为研究对象,采用双向耦合方法进行电主轴电机磁热分析。分别建立电主轴电磁场与温度场的有限元分析模型,对电主轴散热边界条件和材料的温度特性进行计算。将电磁场分析得到的电磁损耗导入到温度场中计算温度场分布,根据温度场改变电磁场材料属性参数以更新电磁损耗,实现电磁场与温度场的磁热双向耦合分析。通过绕组端部的温升实验结果与仿真结果对比分析可以得出,采用磁热双向耦合的分析方法,可以提高磨削电主轴温度场分析的准确性。When the grinding electric spindle was running at high speed,the built-in motor has a large temperature rise,which will have a serious impact on its working performance.Taking the ultra-high-speed grinding electric spindle as the research object,the magnetic thermal analysis of the electric spindle motor was carried out by the bidirectional coupling method.The finite element analysis models of the electromagnetic field and temperature field of the electric spindle were established respectively,and the heat dissipation boundary conditions of the electric spindle and the temperature characteristics of the material were calculated.The electromagnetic loss obtained from the electromagnetic field analysis was imported into the temperature field to calculate the temperature field distribution,and the electromagnetic field material property parameters were changed according to the temperature field to update the electromagnetic loss,so as to realize the two-way coupling analysis of the electromagnetic field and the temperature field.Through the comparison and analysis of the temperature rise experiment results and the simulation results at the end of the winding,it can be concluded that the accuracy of the temperature field analysis of the grinding electric spindle can be improved through the analysis method of the two-way magnetic and thermal coupling.

关 键 词：电主轴 磁热双向耦合 温度场 

分 类 号：TH133.2[机械工程—机械制造及自动化] TM351[电气工程—电机]