中文摘要：

推导了永磁风力发电机转子偏心故障频率产生基理,利用基于磁路的方法,建立了永磁风力发电机模型,将其所建模型导入到有限元分析模块中进行仿真。提取永磁风力发电机定子电流,运用小波包变换对其进行分析,仿真分析结果表明：永磁风力发电机转子偏心故障将会在基频两侧产生故障特征频率信号,且两个特征频率信号随偏心度的增加变化规律有较大区别,而整数次谐波幅值没有较为明显的变化。

英文摘要：

The basic principle of permanent magnet wind generator rotor eccentricity fault frequency was deduced.Based on the method of magnetic circuit the permanent magnet wind generator model was built,and then the built model was imported into the finite element analysis module and was simulated. The stator current of permanent magnet wind generator was extracted and analyzed using wavelet packet transform. The simulation results show that permanent magnet wind generator rotor eccentricity fault characteristic frequency generates on both sides of the fundamental frequency signal,and the characteristics of two frequency signals with the increase of eccentricity change rule have bigger difference,and integer harmonic amplitude have no obvious change.