笼型转子端环断裂引发电机各场量变化情况的分析

doi:10.16180/j.cnki.issn1007-7820.2021.10.003

摘要/Abstract

摘要：

针对型异步电动机鼠笼转子导条断裂和端环断裂故障问题,文中采用有限元方法,以一台Y160L-6型异步电机为例分别建立了正常电机、铝条断裂和端环断裂电机的有限元模型,进行了瞬态磁场计算,分析了电机定转子电流变化情况和气隙磁密的变化情况。以电磁场计算的损耗结果为基础,计算了电机的三维稳态温度场分布,发现不同故障会造成电机温分布不同程度升高。以温度场计算结果为载荷计算转子应力分布,不同故障会造成转子热应力分布不同程度升高,铝条断裂和端环断裂故障对铝条和端环连接处的应力造成较大改变。

关键词: 感应电机, 损耗, 断条, 断环断裂, 电磁场, 温度场, 热应力, 有限元

Abstract:

In view of the problems of broken rotor bar and broken end rings of induction motor, in this study, using the finite element method, a Y160L-6 asynchronous motor is taken as an example to establish the finite element models of the normal motor, the broken aluminum strip and the broken end ring motor. The transient magnetic field calculation is carried out, and the change of stator and rotor current and the change of air gap magnetic density are analyzed. Based on the loss results calculated by the electromagnetic field, the three-dimensional steady-state temperature field distribution of the motor is calculated, and the results show that different faults can cause the temperature distribution of the motor to increase in different degrees. The stress distribution of the rotor is calculated using the calculation result of the temperature field as the load. Different faults lead to different degrees of increase in rotor thermal stress distribution. The fracture of the aluminum bar and the end ring induce a significant change in the stress at the connection between the aluminum bar and the end ring.

Key words: induction motors, loss, broken rotor bar, broken end rings, electromagnetic field, thermal field, thermal stress field, finite element

中图分类号:

TP391

王新掌,郭强,许孝卓. 笼型转子端环断裂引发电机各场量变化情况的分析[J]. 电子科技, 2021, 34(10): 18-26.

WANG Xinzhang,GUO Qiang,XU Xiaozhuo. The Analysis of Field Changes for Induction Motor with Broken End Rings[J]. Electronic Science and Technology, 2021, 34(10): 18-26.

图/表 14

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参考文献 18

[1]	Xie Y, Wang Y Y. 3D temperature field analysis of the induction motors with broken bar fault[J]. Applied Thermal Engineering, 2014, 66(1-2):25-34. doi: 10.1016/j.applthermaleng.2014.02.008
[2]	Liu H P, Lelos V, Hearn C S. Transient 3-D thermal analysis for an air-cooled induction motor [C].San Antonio:IEEE International Conference on Electric Machines and Drives, 2005.
[3]	Chen C K, Lin C Y. Failure analysis of brass rotor bars[J]. Engineering Failure Analysis, 2001, 8(3):293-301. doi: 10.1016/S1350-6307(00)00004-2
[4]	Milanfar P, Lang J H. Monitoring the thermal condition of permanent-magnet synchronous motors[J]. IEEE Transactions on Aerospace and Electronic Systems, 1996, 32(4):1421-1429. doi: 10.1109/7.543863
[5]	靳廷船, 李伟力, 李守法. 感应电机定子温度场的数值计算[J]. 电机与控制学报, 2006, 10(5):492-497.
	Jin Tingchuan, Li Weili, Li Shoufa. Numerical calculation and analysis of stator thermal field in an induction machine[J]. Electric Machines and Control, 2006, 10(5):492-497.
[6]	上官璇峰, 蒋思远, 周敬乐, 等. 双转子双鼠笼永磁感应电机三维全域温度场分析[J]. 电机与控制学报, 2018, 22(11):58-66.
	Shangguan Xuanfeng, Jiang Siyuan, Zhou Jingle, et al. Analysis on 3-D temperature field of dual-rotor permanent magnet induction motor with double squirrel cage[J]. Electric Machines and Control, 2018, 22(11):58-66.
[7]	魏丹, 付雅军, 段敏. 电动车用永磁同步电动机温度场仿真与实验分析[J]. 微特电机, 2017, 45(7):34-36.
	Wei Dan, Fu Yajun, Duan Min. Temperature field simulation and experimental analysis of permanent magnet synchronous motor in electric vehicle[J]. Small & Special Electrical Machines, 2017, 45(7):34-36.
[8]	邰永, 刘赵淼. 感应电机全域三维瞬态温度场分析[J]. 中国电机工程学报, 2010, 30(30):114-120.
	Tai Yong, Liu Zhaomiao. Analysis on Three-dimensional transient temperature dield of induction motor[J]. Proceedings of the CSEE, 2010, 30(30):114-120.
[9]	Lee J I, Bae D, Kwon J L, et al. 3D thermal stress analysis of the rotor of an induction motor[J]. IEEE Transactions on Magnetics, 2000, 36(4):1394-1397. doi: 10.1109/20.877699
[10]	杨震, 丁涛, 郭媛. 绕线式异步电机三维温度场仿真分析[J]. 微特电机, 2019, 47(6):6-9.
	Yang Zhen, Ding Tao, Guo Yuan. Simulation analysis of 3D thermal field of windings rotor asynchronous motor[J]. Small & Special Electrical Machines, 2019, 47(6):6-9.
[11]	王艳武, 杨立, 陈翾, 等. 异步电机转子三维温度场及热应力场研究[J]. 电机与控制学报, 2010, 14(6):27-32.
	Wang Yanwu, Yang Li, Chen Xuan, et al. Study on 3D thermal field and thermal stress field of the induction motor rotor[J]. Electric Machines and Control, 2010, 14(6):27-32.
[12]	杨金霞, 刘卫国. 基于ThermNet与MagNet的无刷直流电动机温度场分析[J]. 微电机, 2009, 42(6):14-17.
	Yang Jinxia, Liu Weiguo. Analysis of the thermal field of brushress motor based on ThermNet and MagNet[J]. Micromotors, 2009, 42(6):14-17.
[13]	高景德, 王祥珩, 李发海. 交流电机及其系统的分析[M].2版. 北京: 清华大学出版社, 2005.
	Gao Jingde, Wang Xiangheng, Li Fahai. Analysis of AC motor and system[M].2nd ed. Beijing: Tsinghua University Press, 2005.
[14]	李鹏, 王彬. 基于振动和电流频谱特征的电机转子断条诊断研究[J]. 中国设备工程, 2019(20):88-90.
	Li Peng, Wang Bin. Research on fault diagnosis of motor rotor bar based on vibration and current spectrum characteristics[J]. China Plant Engineering, 2019(20):88-90.
[15]	吴立泉, 刘永强, 梁兆文. 一种感应电机转子断条早期故障诊断方法[J]. 电机与控制应用, 2019, 46(9):101-110.
	Wu Liquan, Liu Yongqiang, Liang Zhaowen. Method for early broken rotor bars fault diagnosis of induction motor[J]. Electric Machines & Control Application, 2019, 46(9):101-110.
[16]	徐光学, 张帅. 基于振动和电流频谱分析的鼠笼异步电动机转子断条故障分析[J]. 电力设备管理, 2019(7):49-51.
	Xu Guangxue, Zhang Shuai. Fault analysis of broken rotor bar in squirrel-cage asynchronous motors based on vibration and current spectrum analysis[J]. Electric Power Equipment Management, 2019(7):49-51.
[17]	李俊卿, 王罗, 李永刚. 水轮发电机励磁绕组匝间短路转子温度场计算[J]. 华北电力大学学报(自然科学版), 2018, 45(4):58-66.
	Li Junqing, Wang Luo, Li Yonggang. Calculation of rotor temperature field for inter-turn short circuit of hydro-generator excitation winding[J]. Journal of North China Electric Power University(Natural Science Edition), 2018, 45(4):58-66.
[18]	谢颖, 单雪婷, 郭金鹏, 等. 笼型转子导条断裂引发电机各场量变化与故障程度关联性研究[J]. 中国电机工程学报, 2017, 37(14):4222-4231.
	Xie Ying, Shan Xueting, Guo Jinpeng, et al. The Relationship study between field changes and faulty condition in squirrel-cage induction motor with broken bars fault[J]. Proceedings of the CSEE, 2017, 37(14):4222-4231.

参数名称	参数值
额定功率/kW	11
额定电压/V	380
电源频率/Hz	50
定子外径/mm	260
定子内径/mm	180
转子槽数	33
铁芯长度/mm	195
气隙长度/mm	0.4
极数	6