中文摘要：

针对变频调速异步电动机运行模式的多样性导致在检测和故障诊断前需要进行运行模式识别的问题,在Hilbert-Huang变换的基础上提出了一种异步电动机运行模式识别的方法。该方法通过经验模式分解自适应得到本征模函数分量,结合Hilbert谱分析提取信号的瞬时频率,获取频率随时间的变化规律,确定运行模式,为变频调速异步电动机的故障诊断提供了基础。在Matlab环境下,对变频调速异步电动机的定子电压信号进行仿真,仿真结果表明了该方法的有效性和快速性。

英文摘要：

Because of its variety,the operation mode identification is necessary during the detection and fault diagnosis of variable-frequency induction motor.An operation mode identification method is proposed based on HHT（Hilbert-Huang Transform）,which obtains adaptively the components of IMF（Intrinsic Mode Function） by EMD（Empirical Mode Decomposition） and extracts the instantaneous frequency of signal by Hilbert spectral analysis to achieve the frequency variation law in time domain and determine the operation mode.Simulation of the stator voltage based on Matlab shows the validity and rapidity of the proposed method.