| 谐波干扰下的异步电机故障诊断研究 |
| |
| 引用本文： | 李靖,刘微,王书青.谐波干扰下的异步电机故障诊断研究[J].石家庄铁路工程职业技术学院学报,2011(3):47-50. |
| |
| 作者姓名： | 李靖 刘微 王书青 |
| |
| 作者单位： | [1]石家庄铁路职业技术学院,河北石家庄050041 [2]河北化工医药职业技术学院,河北石家庄050031 |
| |
| 基金项目： | 河北省教育厅自然科学资助项目：Z2009460; 河北省高等学校科学技术研究项目：Z2010165 |
| |
| 摘 要： | 推导出在高次谐波干扰下,PARK矢量模平方函数的数学表达式,消除直接进行定子电流分析时基波频率对特征频率的影响。但是新增的频率成分很容易被直流分量、2f分量和4f分量淹没,对PARK矢量模平方函数进行傅立叶变换效果很差。采用多分辨率小波分析,对其各层系数进行分解与重构,其中第7层高频系数和第8层高频系数重构后的波形在发生故障时幅值明显大于无故障时的波形,对电机故障有很高的辨识度,是一种有效的方法。
|
| 关 键 词： | 电机故障 PARK矢量 小波分析 高次谐波 |
Fault Diagnosis Research of Asynchronous Motor with Harmonic Interference |
| |
| Authors: | LI Jing LIU Wei WANG Shuqing |
| |
| Institution: | )(Shijiazhuang Institute of Railway Technology1) Shijiazhuang Hebei 050041 Hebei Vocational College of Chemical and Pharmaceutical Technology2) Shijiazhuang Hebei 050031 China) |
| |
| Abstract: | Square function of the park’s vector modulus under high-order harmonic is given,and it can eliminate the impact of fundamental frequency on characteristic frequency of directly analyzing stator current.But the new frequency components can be cubmerged easily by DC component,2f component and 4f component,and the efficiency of Fourier transform of the the park’s vector modulus square function is low.With multiresolution wavelet analysis,the wavelet coefficients are decomposed and reconstructed.The waveform reconstructed by the high frequency coefficients of layer seven and the high frequency coefficients of layer eight has larger amplitude when the motor is fault,the fault motor is easy to recognise.It is an effective method. |
| |
| Keywords: | motor fault PARK’s vector wavelet analysis high-order harmonics |
| 本文献已被 维普 等数据库收录！ |
