【摘要】 变频机组是地空导弹武器电源系统中不可缺少的重要设备之一。为及时发现机组早期故障以保证正常战备,设计研制了基于小波分析的早期故障检测系统。证明了变频机组发生定子匝间短路时,定子电流中的3次和5次谐波会明显增大的现象,同时利用改进谐波小波提取了这两种谐波分量,并将其作为变频机组发生定子匝间短路时的故障特征分量,分别从软硬件两个方面阐述了系统的总体设计方案。某导弹旅对系统进行的实地试验结果表明,系统能够成功检测到故障特征分量,从而验证了系统的可行性。更多还原

【Abstract】 Variable frequency drive unit is one of the important equipment in power supply for ground-to-air missile weapon system,in order to detect the forepart faults and guarantee normal combat readiness,the forepart fault detection system based on wavelet analysis is researched and designed.It is proved that the 3rd and 5th harmonics are obviously increasing when short circuit between circular windings of the stator in VFD unit occurs;and these two harmonic components can be extracted by adopting improved harmonic wavelet,and used as the fault characteristic component.Then,the overall design strategy of the system is implemented from software and hardware aspects.The system has been tested at certain missile brigade,the test result indicates that the system can detect fault characteristic component successfully.Thus,the feasibility of the system is validated.更多还原