Objective In order to solve the problems of incomplete detection,poor timeliness and difficult interpre-tation of diagnosis results in motor detection by traditional fault diagnosis methods such as vibration method and current method.Methods The motor fault diagnosis system based on harmonic diagnosis technology was proposed,combined with the harmonic diagnosis technology,internet of things technology and intelligent diagnosis algo-rithm,to realize online monitoring of motor running health status.A motor experiment platform was built to com-pare and analyze the accuracy and comprehensiveness of the vibration method,current method and harmonic method.The different degrees of aging and damage were carried out on motor bearings,coils,couplings and other parts to verify the accuracy,timeliness and comprehensiveness of diagnosis results.Results The deterioration val-ues of eight parts of the motor bearing,coil,coupling,etc.changed in line with the actual situation,when different degrees of aging and damage occured in various parts of the motor for the monitoring system based on the harmon-ic diagnosis technology.To ger the diagnosis result took about 1 s only,with the fault causes and maintenance sug-gestions provided.Conclusion The on-line motor fault monitoring system based on the harmonic diagnosis technol-ogy has fast response speed,comprehensive detection,detailed and simple diagnosis report,which provides a new reference direction for the development of motor fault diagnosis technology.
motor fault diagnosisharmonic diagnosis technologyInternet of things technologyOn-line monitoring
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