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This article reviews the technical characteristics of the UZELR series semiconductor traction converters for electric locomotives, manufactured in China and widely used by Uzbekistan Railways JSC “Uzbekiston temir yullari”, develops a model describing the working principle of the PWMI, and presents the conclusions of the analysis.

The results of the substantiation of the average kinematic parameters of the movement of freight trains and the energy efficiency indicators of the transportation work of locomotives of electric traction without stops and with stops on a virtual hilly section of the railway are presented. The stated goal of the research was realized through the theory of locomotive traction through a graphical method of integrating the differential equation of train motion, based on the finite increment method, with subsequent calculation of the numerical values of the specified parameters and indicators. Research results obtained in the form of tabular data, graphical dependencies and equations regression to determine the efficiency indicators of locomotives of electric traction on virtual and real hilly sections of railway, which are recommended on the practice work of specialists in the operation workshop of locomotive depots of the Uzbek railways.

The article provides a rationale for the kinematic parameters of the movement of freight trains with masses different and the energy efficiency parameters of 3VL80S electric locomotives on a virtual hilly section of the railway. In order to implement this justification, a method of graphically integrating the differential equation of train motion is used, which is the basis of the algorithm for performing traction calculations for the movement of the freight trains under study without stoppings at an intermediate station. Kinematic parameters of the movement of freight trains and energy efficiency indicators of 3VL80S electric locomotives are obtained in the form of tabular data and regression equations according to their definition on railway sections with the second type of track profile, which can be used in predicting and normalizing the consumption of electrical energy for traction of trains. The research results are recommended for implementation into work by specialists of the locomotive depots operation workshop of «Uzbekistan Temir Yollari» JSC.