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The paper presents the results of a study aimed at solving the problem of diagnosing the technical condition of electric alternating current machines directly in operational modes of operation without disconnecting them from the network. For this purpose, it is proposed to use the electric parameters of the stator winding, namely, its active and inductive resistances. It is shown that the use of these parameters as a source of diagnostic information will allow ensuring the reliability of diagnostic assessments, as well as digital processing and analysis of measurement results. A new diagnostic method is proposed, which provides high accuracy of measurements and does not require the use of additional equipment.


AC electric machine, active and inductive resistance of stator winding, passive two-terminal network, vector diagram, measuring shunt, selective transformation of signals with periodic weight function, synchronous detector.

Ivan V. Bryakin

D.Sc. (Eng.), Senior Researcher, Institute of Automation and Information Technology, National Academy of Sciences of the Kyrgyz Republic, Bishkek, Kyrgyz Republic. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Igor V. Bochkarev

D.Sc. (Eng.), Professor, Department of Electrical Engineering, Kyrgyz State Technical University named after I. Razzakov, Bishkek, Kyrgyz Republic. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

Kasymbek K. Kelebaev

Director, Bishkek Technical College, Bishkek, Kyrgyz Republic. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..

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