Vibration diagnostics is one of the effective tools for solving a wide range of problems of detecting defects in electrical machines, preventing failure of parts, extending the service life and increasing the overhaul periods of their operation. Simultaneously occurring electromagnetic and mechanical processes during operation significantly complicate the collection and analysis of vibration parameters due to the presence of a large number of harmonic and random components in the experimental data signal. Preservation of electrical safety, reliability and durability of the operation of electromechanical equipment of electric drives based on asynchronous motors in transport remains an urgent task of electrical systems. The determining factor in the effective functioning of diagnostic systems is the establishment of a one-to-one correspondence between the parameters of diagnostic features, determined from the results of current measurements of the machine characteristics, and the type of defects that have arisen. These can be design errors, violations of the technological process of production, maintenance and repair of electrical machines, as well as intensive non-repair operation, all this leads to various kinds of defects.