双斜槽转子变频感应电机温升及转子热应力分析*

doi:10.11985/2023.01.002

电气工程学报 ›› 2023, Vol. 18 ›› Issue (1): 14-23.doi: 10.11985/2023.01.002

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双斜槽转子变频感应电机温升及转子热应力分析^*

明帅¹(), 刘志远¹(), 狄冲¹(), 鲍晓华¹^,²()

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

收稿日期:2022-12-06 修回日期:2023-01-30 出版日期:2023-03-25 发布日期:2023-04-19
通讯作者: 鲍晓华，男，1972年生，博士，教授。主要研究方向为电机设计、磁场分析和有限元分析。E-mail：baoxh@hfut.edu.cn
作者简介:明帅，男，1998年生，硕士研究生。主要研究方向为特种电机振动噪声分析。E-mail：2020110345@mail.hfut.edu.cn
刘志远，男，1997年生，硕士研究生。主要研究方向为电机电磁设计。E-mail：1229866986@qq.com
狄冲，男，1991年生，博士，讲师。主要研究方向为高速电机和开源平台电机建模。E-mail：Chong.Di@hfut.edu.cn
基金资助:
*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)

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

MING Shuai¹(), LIU Zhiyuan¹(), DI Chong¹(), BAO Xiaohua¹^,²()

1. School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009
2. Intelligent Manufacturing Institute of Hefei University of Technology, Hefei 230009

Received:2022-12-06 Revised:2023-01-30 Online:2023-03-25 Published:2023-04-19

摘要/Abstract

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。

关键词: 变频供电, 双斜槽转子, 温升, 转子热应力

Abstract:

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.

Key words: Inverter power supply, double skewed rotor, temperature rise, rotor thermal stress

中图分类号:

TM343

明帅, 刘志远, 狄冲, 鲍晓华. 双斜槽转子变频感应电机温升及转子热应力分析^*[J]. 电气工程学报, 2023, 18(1): 14-23.

MING Shuai, LIU Zhiyuan, DI Chong, BAO Xiaohua. Analysis of Temperature Rise and Rotor Thermal Stress of Variable Frequency Induction Motor with Double Skewed Rotor[J]. Journal of Electrical Engineering, 2023, 18(1): 14-23.

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参考文献 20

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参数	数值
相数	3
极对数p	2
输入电压U/V	135
输入频率f₁/Hz	100
输出功率/kW	22.5
定子槽数Q₁	36
转子槽数Q₂	32
载波频率/Hz	5 000
电机三圆尺寸/mm	260-170-60
中间环厚度/mm	2

供电方式	定子铜耗/W	铁耗/W	转子铝耗/W
正弦供电	532	368	282
SPWM供电	540	518	376

部件	导热系数/[W/(m∙K)]
机壳	167
定子绕组	400
转子绕组	210
等效气隙	0.082
等效绝缘	0.25
槽楔	0.5
转轴	46

部件	正弦供电/℃	SPWM供电/℃
机壳	68.16	78.34
定子绕组	78.48	89.76
转子导条	70.18	81.87
定子铁心	74.34	85.59
转子铁心	69.95	81.56
转轴	61.53	71.33

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

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