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23  Articles
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Pantograph arc is one of the most common and yet unavoidable difficulties in electrified railways. During winter the intensity of arcing increases due to ice layer on the overhead catenary wire. In AC traction system, the sinusoidal waveforms of the suppl... see more

In this paper, we present efficient direct solver for solving the generalized pantographequations with variable coefficients. The approach is based on the second kind Chebyshev polynomialstogether with operational method. The main characteristic behind th... see more

In the model developed it is suggested in a generalized form the method of study of operation of the electric locomotive pantograph mechanism as mechanical system with pneumatic drive. The method has practically important features and can be realized on a... see more

In this paper, a numerical procedure called multistage optimal homotopy asymptotic method (MOHAM) is introduced to solve multi-pantograph equations with time delay. It was shown that the MOHAM algorithm rapidly provides accurate convergent approximate sol... see more

The traction transformer of the traction drive system of a high-speed train is one of the main equipments for energy conversion. The transformer loss will be increased by load harmonics and pantograph arcs at high speed. It is very important to predict lo... see more

In this paper the 3 kV power supply system of Polish high-speed lines is described. Basic OCL parameters and test results of current collection quality is presented. One of the basic parameters limiting the maximum service speed on a given line is the pan... see more

In this paper, we discuss the existence, uniqueness and stability of nonlinear neutral pantograph equation with ?-Hilfer fractional derivative. The arguments are based upon Schauder fixed point theorem and Banach contraction principle. Moreover&... see more

The statistical analysis and probability characteristics of voltage random variation on the pantograph of DC electric locomotive in the recuperation mode are presented in the article.

A mathematical model of DC electric locomotive series DE 1 has been developed for study of the influence of jolt-like voltage changes on the pantograph on transitional electromagnetic processes. The authors have made numeric calculation of the magnetic fl... see more

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