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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Design posunovací lokomotivy / Design of yard locomotive

Miklica, Martin January 2011 (has links)
Plenty of designing works focused on railway technology were made through the time. But the majority of them are concerned with high-speed trains or at least express train locomotives, but works devoted to design freight or shunting locomotives can be barely found. This diploma thesis is looking into nearly unexplored territory and finding out, which possibilities in the design of shunting locomotives of independent traction do exist, and find better solutions then those currently used, where possible and appropriate. The result of this master thesis work is design of shunting locomotive, which respects the requirements of railway standards, ergonomics and safety, and still brings in modern design solutions.
2

Zvýšení pružnosti zážehového přeplňovaného motoru na CNG / Improving Performance of Turbocharged CNG Engine

Janoušek, Michal January 2012 (has links)
The aim of diploma thesis is the design of fuel system for the Caterpillar twelve cylinder spark ignited turbocharged engine. The fuel system is designed for sequential electronic controlled gas injection into intake manifold. Computational model of the engine was calculated in Lotus Engine simulation software. CFD analysis of mixing CNG with air was computed in Star CCM+ software.
3

Design elektrické lokomotivy / Design of Electric Locomotive

Chropovský, Jiří January 2016 (has links)
The topic of this master’s thesis is design of electric locomotive, more specifically universal independent machine made for pull of personal trains and industrial trains as well. The main aim of this design is to create compact design which follows current estetical trends and fulfill technical and ergonomic needs.
4

Podpůrné měniče v elektrické trakci / Auxiliary inverters for electric traction

Polášek, Petr January 2009 (has links)
This thesis concerns with specified problems of an electric traction. It deals with the concept of module controlling EC motor of the voltage 24V and the current 100A. There are described possibilities and principles of controlling EC motor in detail. For controlling, the single-purpose IO MC33035, which is directly specified for it, is used. The thesis describes implementation of both testing and final versions of converter for a circulating pump drive of a cooling circuit in locomotives. The convertor is partly universal and can be used in other applications. According to the implemented convertor, a laboratory test and a model protocol were made. In the second part, the concept is described as well as the implementation of DC/DC conventor of output voltage of 24V and which is supplied by 12V battery. The specified output current is 4A. It is used for supplying of the controlling traction vehicle unit and is installed as a boost convertor which contains a resonance conventor. The presentation of measured parameters of the complete convertor is either a part of this thesis.
5

Návrh pohonu elektrické lokomotivy / Design of the electric locomotive drive

Dočekal, Martin January 2014 (has links)
The focus of the work is the calculation and design of battery-powered drive of locomotive, operating in the sub-siding mode, ie when the locomotive is moving on the track section without the overhead line. The proposed battery groups to ensure the drive train will be installed directly into the locomotive engine room. In the theoretical part of the work there has been done the analysis of the electrical locomotives and electrical unit, which nowadays are used in the Czech Republic in driving of voltage controller with the integrated circuit. Then, in the chapter there is a brief description modern locomotives frequency convertor’s and rectifier’s function. The practical part of the work contains the necessary force and energy calculation for train moving on the determined rails. On the base of the received data, the design of battery groups has been done. These battery groups will work as an independent traction which insures the moving of the train on the determined rails. In the work the design, which consists of STEP-UP and STEP-DOWN convertors, has also been done. The power model and model management were created in Matlab Simulink programme. Data and graphs exported from the Matlab Simulink programm are determined for verifying convertor’s function, which can be found in a separate chapter. In addition to the proposal of the battery drive is at work also has been calculated loss of traction rectifier during normal operation of the locomotive, ie outside siding mode. For this calculation, in the conclusion is listed the theory of calculation of the losses incipient in the transistor and freewheeling diode of rectifier. According to the theory own calculation is performed. Subsequently the liquid cooler calculation of the rectifier is calculated.
6

Didaktické zpracování vyprávění o Jimu Knoflíkovi od Michaela Endeho se zaměřením na literární a jazykovou výchovu / Didactic work about the stories of Jim Knopf from Michael Ende with focus on literary and language eduation

Králová, Marie January 2019 (has links)
Thesis Didactic work about the stories of Jim Button from Michael Ende with focus on literary and language education investigates the feasible utilization of a literary work within teaching a foreign language. Thesis is composed of both theoretical and practical part. In the theoretical part, attention is given to the importance of texts, especially literary texts, as means for teaching foreign language. In respect to the utilization of the literature within foreign language teaching, the thesis highlights the development of target competencies, improvement of language skills and the overall growth of student's personality. Literature is shown as a sphere competent to enrich the common language teaching with a literary experience and an intercultural aspect. Further, the thesis introduces Jim Button novels written by Michael Ende and their specifics from the point of view of their usage by teaching foreign languages. Last but not least, suggestions for work with the novel about Jim Button and Luke the Engine Driver are provided as an alternative teaching material for tuition of German language as a foreign language
7

Analýza provozu trakční napájecí stanice / Hybrid AC/DC,AC/AC substation operation analysis

Lakomý, Marek January 2014 (has links)
The work analyzes the operation of hybrid substations. The first chapter provides an analysis of domestic traction systems and describes in detail specific station. The next chapter follows the first in a way in which obtained parameters are converted to parameters suitable for the simulation program and presents its results. The third chapter discusses the serial communication used in one switchgear and about voltage regulator that controls one high voltage field. The last chapter verifies the simulation results obtained from the second chapter with real measurement and direct comparison is also included.

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