电工技术学报
|
感应电机定子匝间短路故障温升特性研究
陈鹏, 谢颖, 李道璐
哈尔滨理工大学电气与电子工程学院 哈尔滨 150080
Research on the Temperature Rise Characteristics of Induction Motors With Stator Inter-Turn Fault
Chen Peng, Xie Ying, Li Daolu
School of Electrical & Electronic Engineering Harbin University of Science and Technology Harbin 150080 China
全文: PDF (2437 KB)  
输出: BibTeX | EndNote (RIS)      
摘要 感应电机匝间短路故障的温升特性是故障的明显特征之一,针对该问题研究不同工况下匝间短路故障对电机温度场的影响,旨在从电机温度场分布与温升特性角度给出电机故障预警与诊断的方法。以一台笼型感应电机为例,经过合理等效建立了电机三维瞬态温度场仿真模型,分别对空、轻、满载三种工况下的正常与故障电机进行温度场仿真计算。通过与各情况下的电机温升实验数据对比,验证了仿真结果的准确性。综合分析电机温升实验与温度场仿真结果,揭示了电机故障前后传热特性差异,并通过对比电机温升的时间变化特性与空间分布特性的变化情况,得到了与匝间短路故障相关的温度分布特征。针对故障后电机绕组温度的差异特性提出了相应的温度监测与诊断方法,为电机实际运行监测提供参考。
服务
把本文推荐给朋友
加入我的书架
加入引用管理器
E-mail Alert
RSS
作者相关文章
陈鹏
谢颖
李道璐
关键词 感应电机匝间短路故障多工况温度场温升特性    
Abstract:The induction motor is the most common type of AC motor in industrial applications. Due to its complex working conditions, various stator, rotor, or bearing faults will occur. According to statistics, the inter-turn fault (ITF) accounts for about 26-36% of the total motor fault. After the fault occurs, it will cause changes in the magnetic field, thermal field, vibration and noise of the motor. Besides, the overheating problem caused by the fault will accelerate the deterioration of winding insulation and deepen the fault degree. Recently, the research focused on the thermal characteristics caused by ITF, which has achieved good results in temperature detection, fault identification, modeling, and simulation. However, there are still shortcomings in many research methods. Aiming at these problems, the transient thermal field simulation and temperature rise (TR) experiment are adopted to analyze the temporal-spatial characteristics of motor thermal field distribution and the differences in winding temperature before and after the fault. In addition, the thermal characteristics related to the fault can be summarized.
Firstly, the 3D transient simulation model of the motor is established after reasonable equivalence. The motor loss values under no-load, light load, and rated load conditions before and after the fault are used as the heat source, and the whole domain thermal field distribution of the normal and faulty motor under different conditions is obtained by simulation. Secondly, the thermistors are embedded at several key temperature measuring points inside the prototype to carry out the TR experiment of the motor under various working conditions. Also, the results of TR experiments verify the simulation accuracy. Finally, according to the simulation and measured temperature results, three TR characteristics caused by ITF are summarized, and a fault diagnosis method based on the winding temperature difference is proposed.
The simulation and experimental results show that ITF will cause three characteristics of the motor TR: time, space, and winding temperature difference. As the heat generation rate of each part of the faulty motor changes greatly, the TR time of the four key positions of the motor after the fault is shortened by 97.6%, 38.9%, 34.3% and 37.0%, respectively, compared with the normal time, and the TR of each part will rise significantly, especially in the faulty slot. In addition, the spatial temperature distribution after the fault is uneven due to the differences in the circumferential heat dissipation conditions of the motor and the heat generation of each component after the fault. The temperature difference characteristics of winding are the most obvious in the temperature variation of each motor component caused by faults. By analyzing the temperature data of winding at different times, a fault diagnosis method using the variance value of winding temperature is proposed. The results show that the data with the variance value as the characteristic quantity after the fault is more than 20 times larger than the normal one, which indicates that the method can diagnose faults under different load conditions.
The following conclusions can be drawn from the comprehensive analysis of the research results: 1) ITF will cause the differential distribution of the transient and steady thermal field of the motor, and the above characteristics are most obvious in the winding temperature difference. 2) The variation trend of temperature characteristics of motor winding under different working conditions is approximately the same. The faulty slot winding shows the transient characteristics of TR with drastic changes. In addition, the temperature distribution among windings also changes from almost the same at normal time to a huge difference after the fault. 3) The TR characteristics of the motor change obviously after ITF. The winding temperature monitoring and variance analysis method proposed in this paper can effectively diagnose the fault from the perspective of the thermal field.
Key wordsInduction motor    inter-turn fault    multiple load conditions    thermal field    temperature rise characteristics   
    
PACS: TM343  
基金资助:国家自然科学基金(51977052),国家自然科学基金区域创新发展联合基金重点支持项目(U21A20145)
通讯作者: 谢颖 女,1974年生,教授,博士生导师,研究方向为电机内综合物理场计算、新能源汽车用电机设计及多目标优化。E-mail:xieying_1975@163.com   
作者简介: 陈鹏 男,1993年生,博士研究生,研究方向为电机多物理场计算与感应电机故障诊断。E-mail:chenp_7@163.com
引用本文:   
陈鹏, 谢颖, 李道璐. 感应电机定子匝间短路故障温升特性研究[J]. 电工技术学报, 0, (): 35-35. Chen Peng, Xie Ying, Li Daolu. Research on the Temperature Rise Characteristics of Induction Motors With Stator Inter-Turn Fault. Transactions of China Electrotechnical Society, 0, (): 35-35.
链接本文:  
https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.221136          https://dgjsxb.ces-transaction.com/CN/Y0/V/I/35