With modern science and technology progress and the development of production system,motor in production is playing a more and more important role.Motor fault will not only damage the motor,and will affect the whole itself the normal work of the system,even endanger personal safety,cause huge economic losses.Through to the common fault diagnosis and analysis,early detection and prevention of fault fault further deterioration,reduce accident caused by the loss of production,and to create the conditions for the realization of the state overhaul.
According to the work principle of asynchronous motor,this paper expounds asynchronous motor fault diagnosis system the research present situation and the direction of development,and the vibration signal of motor based on fault diagnosis research paper analyzes the motor common main types of abnormal vibration.
This paper mainly studied wavelet transformation theory and wavelet packet analysis theory,from the analysis on the principle of wavelet choice.This paper,by using wavelet packet transform fault diagnosis of asynchronous motor.This paper based on wavelet packet vibration diagnosis of rolling bearing fault diagnosis.Known for existence of motor bearing fault in fault state collected to the vibration signal,the use of kurtosis value are calculated and wavelet packet analysis method of combining the db3 and db10,choose as a wavelet and wavelet packet analysis,to include fault feature frequency information signal reconstruction,get bearing fault characteristic frequency,according to the fault feature of the frequency of numerical and energy,confirmed the bearing fault type.