The thesis research solves an actual scientific problem of synthesis of optimal relay control systems in double fed induction motor, which provide a wide range of speed control, slight dynamic and static decrease in speed in case of low sensitivity to parametric and coordinate perturbations in sliding mode. The analysis of various approaches to development of control system in double fed induction motor was carried out. Mathematical models of asynchronous machine, used for synthesis of control sys-tem, were analyzed, and the choice of support vector of flux linkage, depending on the installation site of controlled converter, was founded. Relay control algorithms are synthesized in response to problem solving of analytical design of regulators on the basis of modified concept of symmetry, which is focused on the concepts of inverse dynamic problems and perturbed and unperturbed motions. The use of wound-rotor induction motor with double-fed induction motor (DFIM) scheme, provides a wide range of adjustment, slight dynamic and static decrease in speed in case of low sensitivity to parametric and coordinate perturbations in sliding mode. The controllers design of relay and vector control system is performed if using different support vectors of flux linkage and when switching converters either stator circuit or rotor circuit or in both circuits simultaneously. Under-signature functions of flux linkage controllers, reactive and active current in motor circuits, rotor speed, if using different control configurations, were obtained. Structural realization of relay and vector control systems in double-fed machine was implemented in different phase spaces. Experimental studies, performed at the laboratory bench, confirmed the effectiveness of electric drive, according to DFIM scheme with relay control algorithms. Validity and reliability of the above thesis provisions and recommendations are verified by consistency of theoretical results with experimental data. Agreement of results of experimental studies and simulation data with absolute error of not more than 0.3816 1/s with a standard deviation of 0.0654 1/s for the speed of rotation and the absolute error of not more than 4.6 A at a standard deviation of 3.7434 A for the stator current confirms the basic theoretical principles and scientific results of thesis research and the possibility of their technical implementation. The results of the thesis were introduced in the municipal enterprise "Dneprodz-erzhinskvodokanal" at the station of water supply, section №3, and in the research and manufacturing association "Dneprofmash" in the electric drive of pulling carriage of tube-drawing bench. The use of electric drive, according to DFIM scheme with converter in the rotor circuit and control system, oriented to the vector of flux linkage in rotor, with follow-up direct feedback at the station of water supply, allowed to extend the period of accident-free equipment operation and raise energy indicators, due to reactive power control, and reduce watt-hour energy use compared to the base case by a mean of 30%. The application of electric drive, according to DFIM scheme with converters in rotor and stator circuits in Dneprofmash, NPO, allowed enhancing the product quality by supporting stabilized drawing speed for a broad product mix, decrease the product quantity by 7%, which does not meet technical requirements, increase rolling rate by 12…16% due to speed doubling of backward motion in pulling carriage, reduce energy loss in the rotor circuit of the machine at least 5 times in contrast with relay and contac-tor combination.
