电器中交流电磁机构的故障诊断  

Fault diagnosis of alternating electromagnetic machine in apparatus

作　　者：沈申生[1] 杨奕[1] 

机构地区：[1]南通大学电气工程学院,江苏南通226007

出　　处：《电力自动化设备》2005年第9期53-56,共4页Electric Power Automation Equipment

基　　金：南通市工业科技创新计划基金资助(A4032)~~

摘　　要：基于LabVIEW的小波包分析和能量检测应用于电器中交流电磁机构故障诊断。在时域范围内,故障振动信号幅值虽有变化,但难以确定电器中交流电磁机构故障类型和程度。建立“能量比值-故障”的电磁机构故障辨识系统,即构造能量比值和电磁机构故障的映射关系,用小波包对振动信号分解与重构,获得振动信号的突变信息及与电磁机构故障相关的特征信息,试验结果可以看出该方法能有效地判断交流电磁机构故障类型和程度。LabVIEW-based wavelet packet analysis and energy measuring is used to diagnose faults of alternating electromagnetic machines in apparatus. Although the amplitude of the defective vibration signal changes in time domain,the fault type and degree of the alternating electromagnetic machine cannot be determined. A fault identification system based on energy ratio and fault type for the electromagnetic machine is brought forward,which constructs the mapping relationship between energy ratio and fault type. By using the wavelet packet,the vibration signal is decomposed and reconstructed to achieve its abrupt change information and the associated fault character information. The experimental results show that the proposed method is effective to diagnose the fault type and degree of alternating electromagnetic machine. This project is sponsored by Industrial Science and Technology Creative Plan Fund of Jiangsu Nantong（A4032）.

关 键 词：交流电磁机构 LABVIEW 小波包 能量 

分 类 号：TP206.3[自动化与计算机技术—检测技术与自动化装置]