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Race Cars Electric Drive
Nosek, Václav ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
This bachelor thesis deals with the categories of motorsport vehicles powered by electric drive. In the theoretical part, a brief history of electric drive and the classification of the different types of electric vehicles are first mentioned. The main part then discusses the main categories of electric motorsport and several models, focusing on their technical specifications. The practical part of the thesis focuses on the comparison of concepts in the T1 racing category. The main emphasis here is on verifying the currently achievable capabilities of electric drive compared to other methods used in the racing environment of the category.
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Concepts of electric vehicles drivetrain
Bede, Filip ; Píštěk, Václav (referee) ; Kučera, Ondřej (advisor)
This bachelor thesis focuses on a review, analysis and comparison of current electric vehicle drive concepts that form the basis for modern electric vehicles. For a better understanding of the composition and application of the concepts, the individual elements of the powertrain have also been discussed in detail in the thesis. The thesis starts with a brief overview of important milestones in the field of electric mobility. It then continues with a detailed discussion of the electric motors, batteries and gearboxes used. These are followed by drive concepts analysed in terms of their impact on the drivability and efficiency of electric vehicles. Examples of modern electric vehicles are then given to demonstrate the concepts in practice. Finally, current internal combustion engine drive concepts are also presented and compared with EV concepts, thus providing a comprehensive view of current trends in automotive technology.
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Gear trains in automotive electric drives
Vlaha, Ondřej ; Poulíček, Matěj (referee) ; Neuman, Ondřej (advisor)
This bachelor thesis deals with the research in field of gearbox applications in electric vehicles. It describes the classification of electric vehicles depending on the type of their powertrain. It also discusses the distribution of electric motor designs and analyses the parameters that affects the efficiency of the drive train. A numerical model of Tesla Model 3 was created in Matlab Simulink to illustrate the effect on powertrain efficiency when using single or dual speed transmission under different driving cycles.
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Energy analysis of motor pump units
Čenč, Samuel ; Štigler, Jaroslav (referee) ; Klas, Roman (advisor)
The bachelor thesis includes description and classification of hydraulic pump units. Individual types of hydraulic pumps, their area of use, advantages and disadvantages, and the method of regulating the output hydraulic parameters are described here. The thesis also includes a brief description of electric drives, whcich are used as a source of mechanical energy to drive hydraulic pumps. The purpose of the first part is to point out that there are two main ways of regulating the output hydraulic parameters. This is the regulation by changing the geometric volume of the hydraulic pump and the regulation by changing the speed of the electric motor. In the main part of the bachelor thesis attention is paid to individual conceptual solutions of hydraulic pump units. The essence of the regulation of hydraulic variables, the principle of operation of regulation in selected representatives regarding their dynamics is explained here. This is followed by experimental verification on real representatives of hydraulic pump units, which enables a deeper insight into the issue of hydraulic power units regulation and the course of electrical and hydraulic variables during the transient state.
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E-bikes
Rynda, Vít ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This bachelor thesis deals with the topic of electromobility, specifically the drive tract of electric bicycles or recumbent bicycles. The thesis focuses on the most essential parts of the traction system, which are the battery and the electric motor. It includes an analysis of the different concepts of the mutual arrangement of the power source and the electric motor of currently used electric bicycles. It also includes descriptions and characteristics of batteries, from past to present representatives. It also includes a brief description of the types of electric motors in use. The practical part involves working with software designed for modifying and configuring the control units of electric vehicles with a central electric motor. Several control unit settings are made, where each of them offers customized motor power limits, assistance levels and driving behaviour. The individual settings are tested under the same specific conditions and compared with each other. Finally, a possible ideal solution is proposed in the form of control unit value settings for the examined criteria.
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Wood log splitter
Trčka, Viktor ; Novák, Tomáš (referee) ; Škopán, Miroslav (advisor)
The scope of the bachelor's thesis is to design a wood log splitter for domestic use up to a maximum diameter of the split log of 400 mm and a maximum length of 1100 mm, so that the splitting power achieves at least 120 kN. Furthermore, to create a critical research for similar splitters, to design a concept according to the specified parameters and to do the functional calculation of the splitter´s equipment and to design particular components of the splitter. Evaluation of Strength and other calculations of the main components. Equipment assembly drawing documentation and welding subassembly of the frame.
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Long-distance belt transport
Baričiak, Petr ; Kašpárek, Jaroslav (referee) ; Zeizinger, Lukáš (advisor)
The bachelor thesis deals with the calculation and design of a conveyor belt with a transported quantity of 3 500 t/h with a length of 300 m and an elevation of 22 m. The introductory part is devoted to detailed research of individual components of belt conveyor. In the following chapters, a functional calculation according to ISO 5048, strength check of the shaft, bearings of the driving pulley and conveyor belt is performed. The last part of the thesis describes the choice of parts, which was based on strength and calculation chapters. The result of the entire thesis is the drawing documentation containing the drawing of the assembly.
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Stroke mechanism of bridge crane
Drábík, Michal ; Sedláček, Martin (referee) ; Škopán, Miroslav (advisor)
This bachelor thesis is focused on the design stroke mechanism of bridge crane with load capacity of 10 000kg. The thesis contains a critical research of today-manufactured crane trolleys and a selection of a suitable conception. Part of the design are calculations of the lifting mechanism base parts, for example: rope diameter, pulleys diameters, complete dimensions of the rope drum, selection and the design of the electric motor, gearbox, brake, frequency inverter, gear and drum coupling. Last chapter is focused on the strength calculation of the rope drum, durability of the bearing, weld strength examination and radial load. Part of the thesis is the lifting mechanism assembly drawing documentations and the rope drum welding assembly.
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Wood-splitting machine
Bořil, Antonín ; Hloska, Jiří (referee) ; Malášek, Jiří (advisor)
The aim of this work is of known structure splitting machines to design their own structure splitting machines, including stress analysis and design of hydraulic circuit. For the design, it is necessary to select the maximum dimensions of wooden logs, which are length 1100 mm and diameter 450 mm. The machine structure is designed as a vertical.
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Stroke mechanism of bridge crane
Jirásek, Jiří ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
This bachelor thesis deals with the design of the lifting mechanism of the crane cat, for a bridge storage crane with a load capacity of 8,000 kg. The thesis contains a critical research of similar existing solutions and the selection of the appropriate concept. The design includes calculations of the basic parameters of the stroke, and based on them selects appropriate rope, pulleys, and design of the rope drum. Furthermore, there are calculated and selected suitable components of the stroke mechanism such as electric motor, clutch, brake and gearbox. The last part deals with the design of the bearing, the drum pin and the calculation of the shaft key. The output of the work is the technical drawing of the whole assembly of the mechanism and the welding subassembly of the rope drum.
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