Kliuiev O.
Candidate of Technical Sciences, Associate Professor of the Department of Electrical Engineering and Electromechanics,
Dniprovsk State Technical University, Kamianske,
Dnipropetrovsk region, Ukraine
ORCID: 0000-0003-4542-3317

Abstract
The paper solves an actual scientific problem, which consists in the application of the modal control method for the synthesis of a modal observer the state of the active power channel of an asynchronous machine (AM) in the system of its vector control by the stator. The main task of the observer is to identify the moment of static load on the shaft AM in order to use this information in the extreme control circuit of the asynchronous electric drive. The asymptotic stability and sufficient accuracy of the observer of the moment of static load on the shaft AM to determine the coordinates of the minimum of the quality functions of the extreme control the asynchronous machine, which improves its energy indicators, has been proven by the method of mathematical modeling.

 Keywords: Asynchronous machine, vector control, modal load moment observer, asymptotic stability, distribution of polynomial roots.