感应电机定子匝间短路故障温升特性研究  

Research on the Temperature Rise Characteristics of Induction Motors with Stator Inter-Turn Fault

作　　者：陈鹏 谢颖[1] 李道璐 Chen Peng;Xie Ying;Li Daolu(School of Electrical&Electronic Engineering Harbin University of Science and Technology,Harbin 150080 China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,哈尔滨150080

出　　处：《电工技术学报》2023年第18期4875-4888,共14页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(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);黑龙江省自然科学基金重点项目(ZD2022E006)资助。

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。The induction motor is the most common AC motor type 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 motor noise.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 areas for improvement in many research methods.Therefore,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 differenc

关 键 词：感应电机 匝间短路故障 多工况 温度场 温升特性 

分 类 号：TM343[电气工程—电机]