【摘要】 分析了变频器供电时所产生的谐波对电动机转子断条故障电流信号的影响,基于Matlab/Simulink建立了直接转矩控制变频器供电下异步电动机转子故障系统仿真模型,在变频器不同供电频率下针对电动机转子正常和故障情况进行仿真分析,理论上验证了变频器谐波影响下电动机转子故障特征频率的正确性,利用连续细化傅立叶变换和自适应滤波方法实现了变频器不同频率供电下异步电动机转子故障的在线检测。更多还原

【Abstract】 In order to detect rotor faults of inverter-fed asynchronous machine at earlier stage,the simulation of DTC inverter-fed drive system with rotor asymmetries is established.The complexity and specialty of measuring the stator current for the DTC inverter-fed motor with rotor fault are investigated.Furthermore,the on-line fault detection for the inverter-fed asynchronous machine with rotor faults are realized,by using continuous subdivision Fourier transform and self-adaptive filter techniques.更多还原