Determining the Quality of Electric Motors by Vibro-Diagnostic Characteristics

Abstract

Experimental studies of vibrations of asynchronous electric motors (EMs) of the electric bus traction electric drive arecarried out in the paper. The presented studies are based on generalization of the diagnostic features of vibrationcharacteristics and statistics concerning the limiting values of vibration parameters of EMs and their dependence on thetechnical condition. The analysis of the obtained results allowed us to determine the permissible vibration levels of EMs inthe frequency range from 5 Hz to 10 kHz. The method of diagnosing EMs traction electric drive according to theindicators of vibration levels is developed, which allows to evaluate their technical condition. The values of thepermissible vibrational accelerations of the electric bus EMs are determined, which enable to estimate their technical level.This method allowed to develop classes of evaluation of the EMs technical condition by the level of their vibration, whichmakes possible to predict their resource.