National Repository of Grey Literature 10 records found  Search took 0.01 seconds. 
Microprocessor-controlled autonomous source of constant current and voltage
Kováč, Marek ; Lattenberg, Ivo (referee) ; Pavelka, Ondřej (advisor)
The task of bachelor thesis is proposal of switching source for the construction of leadacid battery charger 6/12V controlled by microprocessor. It is based on buck converter of voltage. The first part presents the activity of converter and properties of lead-acid batteries, followed by a proposal of converter for a given application. The second part describes a criteria for selection of individual components and dimensioning them. The result of this thesis is simulation of converter in PC program Micro-Cap 9, along with the necessary calculations, a proposal of circuit with the calculation of inductor and methods of measurement of output quantities. Finally, is realized circuit board with a couple measurements and control program for the microcontroller. The entire proposal is focused to achieving the greatest simplicity of facility and efficiency and quality of charging accumulators together at low cost to the product.
Manufacture of heavy steel castings
Valenta, Pavel ; Kováč, Marek (referee) ; Záděra, Antonín (advisor)
The aim of this work is background research on a topic of manufacture of heavy steel castings . The work contains a summary of the manufacturing process of heavy casting and its specifications. This is associated with the large size, high weight and a long period of solidification.
Developments in numerical simulation of foundry processes
Haluza, Jakub ; Kováč, Marek (referee) ; Krutiš, Vladimír (advisor)
With the development of the computer equipment the numerical simulation has become a strong tool for the design and optimization of foundry processes. The goal of the modelling is the tuning of the casting technology in pre-manufacturing stage. Numercial simulation allows studying metal flow, solidification and casting cooling. The work will be aimed to new trends and developments in the field of numerical simulation of foundry processes.
Numerical simulation of the ceramic core manufacturing in the investment casting process
Kinc, Marek ; Kováč, Marek (referee) ; Tomek, Ladislav (advisor)
The aim of this diploma thesis is validation of numerical simulation of the ceramic core manufacturing in the investment casting proces. The first part submit the theoretical description of the manufacturing of the ceramic cores and a description of the basic principles of numerical simulations. The second part compares the video recording of filling the wax-ceramic mixture to the die-casting mold and simulation of the same process created in a simulation software Cadmould 3D-F.
Digital AM / FM transmitter
Kováč, Marek ; Strašil, Ivo (referee) ; Pavelka, Ondřej (advisor)
This master thesis is focused on the theoretical description and practical implementation of software defined transmitter. The main aim of this thesis was made the prototype of software defined transmitter in FM band. Theoretical part is determined to description of basic parts of equipment and working principles to understand the basic principle of digital transmitters and define the appropriate component base for construction. Discussed are used types of A/D and D/A converters, blocks of digital signal processing and the roles, which these components performs. The second part is focused practical. Specified are suitable types of components and block diagram is proposed for following electrical connection and printed circuit board in Eagle program as a plug-in modul for developmental platform Arduino. The main point is program, which sets and controls the transmitter. Next important part is impedance match and antenna tuning, which is explain in practical part of thesis. The result is prototype of software defined transmitter compatible with Arduino Uno platform.
Microprocessor-controlled autonomous source of constant current and voltage
Kováč, Marek ; Lattenberg, Ivo (referee) ; Pavelka, Ondřej (advisor)
The task of bachelor thesis is proposal of switching source for the construction of leadacid battery charger 6/12V controlled by microprocessor. It is based on buck converter of voltage. The first part presents the activity of converter and properties of lead-acid batteries, followed by a proposal of converter for a given application. The second part describes a criteria for selection of individual components and dimensioning them. The result of this thesis is simulation of converter in PC program Micro-Cap 9, along with the necessary calculations, a proposal of circuit with the calculation of inductor and methods of measurement of output quantities. Finally, is realized circuit board with a couple measurements and control program for the microcontroller. The entire proposal is focused to achieving the greatest simplicity of facility and efficiency and quality of charging accumulators together at low cost to the product.
Numerical simulation of the ceramic core manufacturing in the investment casting process
Kinc, Marek ; Kováč, Marek (referee) ; Tomek, Ladislav (advisor)
The aim of this diploma thesis is validation of numerical simulation of the ceramic core manufacturing in the investment casting proces. The first part submit the theoretical description of the manufacturing of the ceramic cores and a description of the basic principles of numerical simulations. The second part compares the video recording of filling the wax-ceramic mixture to the die-casting mold and simulation of the same process created in a simulation software Cadmould 3D-F.
Digital AM / FM transmitter
Kováč, Marek ; Strašil, Ivo (referee) ; Pavelka, Ondřej (advisor)
This master thesis is focused on the theoretical description and practical implementation of software defined transmitter. The main aim of this thesis was made the prototype of software defined transmitter in FM band. Theoretical part is determined to description of basic parts of equipment and working principles to understand the basic principle of digital transmitters and define the appropriate component base for construction. Discussed are used types of A/D and D/A converters, blocks of digital signal processing and the roles, which these components performs. The second part is focused practical. Specified are suitable types of components and block diagram is proposed for following electrical connection and printed circuit board in Eagle program as a plug-in modul for developmental platform Arduino. The main point is program, which sets and controls the transmitter. Next important part is impedance match and antenna tuning, which is explain in practical part of thesis. The result is prototype of software defined transmitter compatible with Arduino Uno platform.
Manufacture of heavy steel castings
Valenta, Pavel ; Kováč, Marek (referee) ; Záděra, Antonín (advisor)
The aim of this work is background research on a topic of manufacture of heavy steel castings . The work contains a summary of the manufacturing process of heavy casting and its specifications. This is associated with the large size, high weight and a long period of solidification.
Developments in numerical simulation of foundry processes
Haluza, Jakub ; Kováč, Marek (referee) ; Krutiš, Vladimír (advisor)
With the development of the computer equipment the numerical simulation has become a strong tool for the design and optimization of foundry processes. The goal of the modelling is the tuning of the casting technology in pre-manufacturing stage. Numercial simulation allows studying metal flow, solidification and casting cooling. The work will be aimed to new trends and developments in the field of numerical simulation of foundry processes.

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1 Kováč, Maroš
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1 Kováč, Matúš
22 Kováč, Michal
2 Kováč, Milan
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