Browsing by Author "Samaš, Vladimír"

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Porovnanie systémov prenosu výkonu koľajových vozidiel s nezávislou trakciou
(University of Žilina, 2025) Bučko, Martin; Samaš, Vladimír; Dižo, Ján; Blatnický, Miroslav
The article deals with independent traction rail vehicles, mainly the power transmission type. The advantages and disadvantages of different types of power transmission for independent traction vehicles are compared, including the use of a particular type in each category of rail vehicles and a schematic illustration.
Súčasný stav prevodoviek s nastaviteľným prevodovým pomerom pri elektrickom pohone
(University of Žilina, 2024) Blatnický, Miroslav; Samaš, Vladimír; Dižo, Ján
The scope of this article covers potential technologies for transmission mechanisms with variable gear ratios that can be applied to electric traction. A transmission with an adjustable gear ratio allows for the adaptation of the gear ratio according to usage conditions. By adjusting the gear ratio and consequently the traction forces, we can enhance driving parameters, e.g. improved both efficiency and range. The paper theoretically examines various transmissions with variable gear ratios and compares their parameters in the context of electric drives.
Systèmes de traction électrique modernes: avantages des moteurs PMSM dans le transport ferroviaire
(University of Žilina, 2025) Samaš, Vladimír; Bučko, Martin; Gerlici, Juraj; Dižo, Ján; Blatnický, Miroslav
Currently, there is a growing global emphasis on environmentally friendly transportation, with railway transport being one of the most efficient and sustainable modes of travel. This form of transport is distinguished by low rolling resistance, which leads to reduced energy consumption for both passenger and freight transport. Electric traction, widely used in railway vehicles, can be categorized as either dependent or independent. Dependent electric traction represents an environmentally friendly solution, as it eliminates the need for petroleum based fuels and instead utilizes electricity drawn from the grid. However, this approach is truly ecological only when the electricity is generated from renewable and sustainable sources. Modern electric traction systems rely on electric motors, and this article aims to provide a detailed analysis of the application of permanent magnet synchronous motors (PMSM) in railway transport, particularly in the context of electric traction. PMSM motors are characterized by high efficiency and excellent controllability, making them well-suited for extensive use in railway applications. Their significant potential in this field positions them as a promising solution for future sustainable and efficient transport systems.