Liubarskyi B. The theoretical basis for the selection and evaluation of advanced systems of electromechanical energy conversion of electric rolling stock

The object of study: the process of electromechanical energy conversion in electric rolling stock of railways. Objective: to develop the scientific basis for the selection of different types of advanced systems of electromechanical energy conversion, determining their optimum modes and delineating the management of each of them for electric rolling. Methods: generalized theory of electromechanical energy converters based on solving the Lagrange equations for electromechanical systems; finite element method and the combined chain-field method; methods of approximation of functions; simulation; cyclic method of descent; Runge-Kutta method. Theoretical and practical results: mathematical and simulation models, as well as software and algorithmic complex can be used to calculate the parameters and characteristics of the electromechanical energy conversion systems; developed universal methodology for determining the efficiency of the traction drive with traction motors AC depending on the parameters of the vector control and operating modes for different types of electric rolling stock, which can be used in the design of traction electric equipment; A technique for choosing the type of electromechanical energy converter for modern electric rolling; developed software and algorithmic complex by definition rational type of traction motor. Novelty: further developed the theoretical basis of the selection and evaluation of electromechanical energy converters by developing a generalized mathematical model of such converters based on the use of Lagrange's equations and taking into account the nonlinearity of the magnetic system of the converter, and further use of the proposed model in modeling the processes of conversion of electrical energy into mechanical energy and determination of the parameters of actuators ; first proposed performance criteria of electric rolling stock, defined as the ratio of the energy converted from electrical to mechanical energy to the maximum possible energy that can be obtained under the terms of the clutch wheel and rail at the maximum possible speed on the track section. Degree of implementation: The results of the thesis put into practice the design of electric rolling stock SE "Factory Electrotyazhmash" (Kharkov), State Enterprise "State Research Center of Railway Transport of Ukraine" (Kiev), and in the educational process of the department of electrical transport locomotive and NTU "KPI"(Kharkov). Scope of use: electric transport.