永磁同步电机匝间短路故障匝数诊断方法  

Diagnosis Method of Turns of Permanent Magnet Synchronous Motor for Inter-Turn Short-Circuit Fault

作　　者：付彦伟 余建生 易建波 FU Yanwei;YU Jiansheng;YI Jianbo(Guodian Dadu River Zhentouba Hydropower Development Co.,Ltd.,Leshan 614700,China;School of Mechanical and Electrical,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]国能大渡河枕头坝发电有限公司,四川乐山614700 [2]电子科技大学机械与电气工程学院,四川成都611731

出　　处：《电机与控制应用》2023年第9期42-48,共7页Electric machines & control application

基　　金：四川省科技厅重点研发计划项目(2022YFG0120)。

摘　　要：针对永磁同步电机(PMSM)发生匝间短路故障时故障匝数难以诊断的问题,提出了在离线状态下对电机发生故障的匝数进行精确诊断的方法。首先分析了绕组发生匝间短路故障前后的电机模型,通过在离线的故障电机电路中接入激励源的方式,提取出了故障相电流的幅值和相位,结合激励源参数、电路参数,建立了故障匝数指示器。仿真结果表明,该方法可以准确地计算出从无故障状态到全绕组故障状态范围内发生短路的绕组匝数。该方法可以直接在电机上实施,不需要在目标电机上加装复杂的设备或添加额外传感器,在永磁同步电机的检修等方面具有良好的使用价值。For the problem that the number of faulty turns is difficult to diagnose when an inter-turn short-circuit fault occurs in a permanent magnet synchronous motor(PMSM),an accurate diagnosis method for the number of faulty turns of a faulty motor offline in an offline state was proposed.Firstly,the conditions that the motor model under the inter-turn short-circuit fault of the winding and under the normal state were analyzed,the excitation source was connected to the simulation circuit,the amplitude and phase of the faulted phase current were extracted,and the fault diagnosis indicator was established by combining the excitation source value、circuit parameters and current.The simulation results illustrate that the method could accurately calculate the number of winding turns in the range from the fault-free state to the full-winding fault state.The method can be directly implemented,without installing complex equipment and additional sensors on the target motor,and has utility value in the maintenance of permanent magnet synchronous motors.

关 键 词：永磁同步电机 匝间短路 短路匝数测定 故障诊断 

分 类 号：TM351[电气工程—电机]