双斜槽转子变频感应电机温升及转子热应力分析  

Analysis of Temperature Rise and Rotor Thermal Stress of Variable Frequency Induction Motor with Double Skewed Rotor

作　　者：明帅 刘志远 狄冲[1] 鲍晓华[1,2] MING Shuai;LIU Zhiyuan;DI Chong;BAO Xiaohua(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009;Intelligent Manufacturing Institute of Hefei University of Technology,Hefei 230009)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]合肥工业大学智能制造技术研究院,合肥230009

出　　处：《电气工程学报》2023年第1期14-23,共10页Journal of Electrical Engineering

基　　金：国家自然科学基金(51977055);合肥工业大学智能制造技术研究院2019年度智能网联及新能源汽车技术科技成果转化及产业化专项资金(IMIWL2019001)资助项目。

摘　　要：针对双斜槽转子变频感应电机温升及转子热应力研究的不足,研究变频器供电下双斜槽转子感应电机温升及转子热应力的分布规律。采用三维有限元法结合改进的铁耗模型对变频供电方式下的电磁损耗进行计算。以三维电磁场损耗密度为载荷,施加到三维温度场模型中作为热源,模拟变频供电方式下电机的瞬态温度变化过程,得到电机机壳的温升变化曲线及电机各部分的温度分布情况,并通过样机机壳温升试验验证了仿真计算结果的准确性。最后,以温度场的计算结果为载荷,施加相应约束条件,得到了双斜槽转子鼠笼热应力分布情况,指出了双斜槽转子鼠笼易断裂位置,得出有益结论。本文完善了双斜槽转子断条故障原因,为双斜槽转子的热优化设计提供重要参考。In view of the deficiency of the research on the temperature rise and rotor thermal stress of the double-skewed rotor variable frequency induction motor,the distribution law of the temperature rise and rotor thermal stress of the double-skewed rotor induction motor under the power supply of the inverter are studied.The electromagnetic loss under inverter power supply mode is calculated by using the 3D finite element method combined with the improved iron loss model.Taking the 3D electromagnetic field loss density as the load and applying it to the 3D temperature field model as the heat source,the transient temperature change process of the motor under the inverter power supply mode is simulated,and the temperature rise curve of the motor shell and the temperature distribution of each part of the motor are obtained,and the accuracy of the simulation calculation results is verified by the temperature rise experiment of the prototype.Finally,the thermal stress distribution of the double-skewed rotor squirrel cage was obtained by taking the calculation result of the temperature field as the load and applying the corresponding constraints.The position where the squirrel cage of the double-skewed rotor is easy to break is pointed out,and some useful conclusions are drawn.The cause of the broken bars of the double-skewed rotor is improved and an important reference for the thermal optimization design of the double-skewed rotor is provided.

关 键 词：变频供电 双斜槽转子 温升 转子热应力 

分 类 号：TM343[电气工程—电机]