Results 81 to 90 of about 98,921 (148)

Reduced operating costs by train traffic optimization

Nauka ta progres transportu, 2012
The paper conducted research to reduce the cost of electricity for traction power in the wholesale electricity market. Our calculations show that the previously known criteria for evaluating energy consumption in the market conditions are irrelevant.
O.M. Polyah, D.O. Bosiy, N.A. Logvinova
doaj  

Life analysis of multiroller planetary traction drive [PDF]

A contact fatigue life analysis was performed for a constant ratio, Nasvytis Multiroller Traction Drive. The analysis was based on the Lundberg-Palmgren method for rolling element bearing life prediction. Life adjustment factors for materials, processing,
Coy, J. J., Loewenthal, S. H., Rohn, D. A.   +2 more
core   +1 more source

Modeling the Operating Conditions of Electric Power Systems Feeding DC and AC Traction Substations

Energies
This paper presents the findings of the research aimed at developing computer models to determine the operating conditions in electric power systems (EPSs) feeding DC and AC railway substations.
Iliya K. Iliev, Andrey V. Kryukov, Konstantin V. Suslov, Aleksandr V. Cherepanov, Nguyen Quoc Hieu, Ivan H. Beloev, Yuliya S. Valeeva   +6 more
doaj   +1 more source

Analysis methods of stochastic transient electro–magnetic processes in electric traction system

Nauka ta progres transportu, 2013
Purpose. The essence and basic characteristics of calculation methods of transient electromagnetic processes in the elements and devices of non–linear dynamic electric traction systems taking into account the stochastic changes of voltages and currents ...
T. M. Mishchenko
doaj  

MODES OF OPERATION OF THE SYSTEM OF TRACTION POWER AC USING REACTIVE POWER COMPENSATION DEVICES

Electrical engineering & Electromechanics, 2015
The paper presents a systematic analysis of existing methods of reactive power compensation. The study of operating modes of the systems external and traction power supply is carried out.
I.V. Domanskyi
doaj  

Calculation of locomotive traction force in transient rolling contact

Applied and Computational Mechanics, 2017
To represent thewheel-rail contact in numerical simulations of rail vehicles, simplified models (Fastsim, Pola´ch etc.) are usually employed. These models are designed for steady rolling only, which is perfectly suitable in many cases. However, it is shown to be limiting for simulations at very low vehicle speeds, and therefore it does not actually ...
openaire   +5 more sources

Optimization of ATO Re-benchmarking Method Based on Light Braking Command

Chengshi guidao jiaotong yanjiu
Objective When the initial parking of an FAO (fully automatic operation) train in station exceeds the permitted range for door opening, the ATO (automatic train operation) system needs to re-benchmark accurately.
HUA Zhichen, QIAO Zhiyuan, JIN Jie
doaj   +1 more source

Surface roughness effects in elastohydrodynamic contacts [PDF]

Surface roughness effects in full-film EHL contacts were studied. A flow factor modification to the Reynolds equation was applied to piezoviscous-elastic line contacts. Results for ensemble-averaged film shape, pressure distribution, and other mechanical
Hamrock, B. J., Tripp, J. H.
core   +1 more source

Theoretical aspects and methods of parameters identification of the electric traction system devices. method of cyclic current-voltage characteristics

Nauka ta progres transportu, 2013
Purpose. To define the characteristics of numerical calculations of mathematical model with one or more cyclic current voltage characteristics (CVC). This is an urgent problem, since any electric traction system device and electrified track in general ...
T.M.Mishchenko
doaj  

MATHEMATIC SIMULATION OF TRANSIENT PROCESS IN A. C – SYSTEM “ELECTRIC – TRACTION – NETWORK – LOCOMOTIVE” 2. SWITCH ON THE MAIN LOCOMOTIVE’S POWER CONVERTER IN “FREE PAY” MODE; DEFINITION AND ANALYSIS CURRENT SURGE OF MAGNETIZATION

Nauka ta progres transportu, 2010
The article is a continuation of analysis of mathematical models for AC systems, in which the elements of electric-traction network and switch-on of power transformer in an idling mode are gradually connected.
T. M. Mischenko
doaj