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Design of switchgear system
Róža, Štefan ; Slavata, Petr (referee) ; Kadlec, Radim (advisor)
The thesis depicts the substation of low voltage switchgear design (nn) based on the back scheme of its connection. In the first part of the switchgear design nn the thesis deals with the adjustment of the back connection scheme and its analysis necessary for continuation of its switchgear designing. The main part of the thesis describes the scheme creation in a computer program, the implementation of certain computations requisite for safe and failure-free operation of the station. Here, the thesis points out the solutions of conditions, where the back scheme does not agree with the calculated results. The circuit was tested for voltage drop and load decomposition, symmetrical 3-phase short circuit and 1-phase short circuit. Further, the thesis dwells on the switchgear designing of low voltage switchgear. Finally was created in 3D visualization and treated bid for the material needed for the production of switchgear system, production of switchgear system and UPS.
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Design of Measurement Net
Krajčír, Róbert ; Drexler, Petr (referee) ; Kadlec, Radim (advisor)
This thesis deals with transfer of measured data from sensors placed on pulse power generator for long distances in areas with strong outer interference. Main goal is to design fast and reliable network. Therefore some basic transfer methods, which are available for usage, are analyzed. Regarding to the characteristics of these methods, the most suitable option was chosen, which is analog fiber optic link. In the next phase, the concept of the network itself is dealt with, including analysis and choice from variety of modulation techniques, transmitters and recievers and their characteristics. Variety of drive and amplifier circuits are also mentioned, with emphasis on their influence on transfer and noise attributes and available bandwidth. Based on theoretical analysis and component pros discovered, exact parts are chosen and complete concept of the network is established, including auxiliary circuits. According to this concept printed circuit boards for both transmitter and reciever are made and tested.
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A Low Voltage Wiring System for an Office Block
Nestrojil, Martin ; Slavata, Petr (referee) ; Kadlec, Radim (advisor)
This paper describes the design of a low voltage network in an office building. In the beginning work is given for the theoretical part of the topics that we need to create a network design in a given building. In this part of the guiding principles are conductor sizing, fuse wires and a selection of protective devices. Everything was sought in scientific publications and Articles. The theoretical part will be followed by a practical part with the first adjusted underlying schema, and then will address a practical design using programs supplied by the company Eaton. The goal of this work is to get acquainted theoretically with the main principles of network design, and then practically with your programs and create a complete network design of the building.
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Home Smart Wiring with Independent Sources
Doktor, Viktor ; Uher, Václav (referee) ; Kadlec, Radim (advisor)
The output of our work is complete proposal of the building wiring, the photovoltaic power plant proposal and technical report. In the first part we find the theoretical information concerning the proposal of the house wiring, explanations of basic terms and principles of technical documentation. We can find also an overview of known intelligent systems and a brief description. In the second part we describe itself proposal of concrete building, step by step. We can find a description of a created program to control building. The third part is focused on theoretical information about photovoltaics. Here we explain the basic principle, the limits of technology, materials and the panel structure. In the fourth part we proceeded to the actual plant proposal. Here we find the principle and a block diagram of system and description of the components of the plant, evaluation of production and energy consumption. Drawings of the technical documentation wiring as a photovoltaic power plant, distributor scheme and its layout can be found in the technical report, in Attachment.
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A Practical Panel for Smart Home Wiring
Pospíšil, Josef ; Steinbauer, Miloslav (referee) ; Kadlec, Radim (advisor)
This bachelor thesis deals with intelligent installations in buildings using centralised system inels. Individual components of this system, such as the central unit, power supply and separators, are described. Used busbars and their connection possibilities are mentioned in the next part together with different ways of access to the central unit. The thesis also includes the visualisation of the demonstration panel, which will be used as a model in laboratories. Next part consists of the basic functions simulation and verification of their functionality. Finally the formation of the panel together with its connection and programming is described. The panel documentation is enclosed at the end of the thesis.
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A Brief Design of Optical Resonators
Hubík, Daniel ; Nešpor, Dušan (referee) ; Kadlec, Radim (advisor)
This bachelor thesis is focused on analysis of split-ring resonators in THz region. Simulations were made by finite elements method and by finite-difference time-domain method. At first we created a resonating structure that works in GHz region. Then we were observing a dependence of movement of resonant frequency on the size of resonator. In the final chapter we assigned frequency dependent values of permitivity to such structure. As the result we simulated working resonator at frequency 500THz. All simulations have been made in program HFSS ANSYS and Lumerical FDTD Solutions.
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Analysis of an Electromagnetic Wave on the Boundary between Electromagnetic Materials
Kadlec, Radim ; Lazar, Josef (referee) ; Macháč, Jan (referee) ; Kroutilová, Eva (advisor)
The proposed dissertation thesis contains an analysis of conditions on the boundary between layers having varied electromagnetic properties. The research is performed using consistent theoretical derivation of analytical formulas, and the underlying problem is considered also in view of multiple boundaries including the effect of the propagation of electromagnetic waves having different instantaneous speed. The author presents a survey and formulation of the basic characteristics of methods used for electromagnetic wave propagation analysis; in this respect, special emphasis is placed on radial models. The processing of the topic involved the designing and verification (using a set of different, layered planar materials) of algorithms to analyze the electromagnetic field components. The algorithm was assembled to enable simple evaluation of all components of the electromagnetic field in relation to the speed of the wave propagation in a heterogeneous environment. The proposed algorithms are compared by means of different numerical methods for the modelling of electromagnetic waves on the boundary between materials; moreover, electromagnetic field components in common points of the model were also subject to comparison. When in conjunction with tools facilitating the analysis of material response to the source of a continuous signal, the algorithms constitute a supplementary instrument for the design of a layered material. Such design enables the realization of, for example, recoilless plane, recoilless transition between different types of environment, and filters for both optical and radio frequencies.
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Relaxation times in the polymer gel electrolytes by magnetic resonance methods
Jehličková, Lenka ; Kadlec, Radim (referee) ; Kubásek, Radek (advisor)
The purpose of this Bachelor’s thesis is measuring of gelly structure relaxation using magnetic resonance imaging. The first part closely describes the theory needed for upcoming measuring. There is explained basic physical principle of NMR and terms such as precession, Larmor frequency and RF pulses are established. The measuring instrument is also schematically introduced, as are its main parts and division in aspect of magnetic fields. The most important part is explanation and understanding of relaxation processes that happen during NMR. Individual sequences used for measuring of relaxation processes are demonstrated by the spin echo method, which is the basic building block of all successive methods. The second part is processing of results. Measuring of fall and spectre of given gelly samples is expressed as a function of time T2 on the sample solidification time.
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Numerical Modelling of the Light Source
Pavelka, Adam ; Koňas,, Petr (referee) ; Kadlec, Radim (advisor)
The master’s thesis deals with photometry units used in light engineering. There are defined the methods of modelling the illumination systems, their advantages, disadvantages and possibilities of using. Furthermore, the thesis deals with modelling of two illumination systems by ray-tracing in programming environment of MATLAB. The master’s thesis describes the analysis of the problem and the program designing process. Acquired model results are then compared with the real measurements of both illumination systems which allow the discussion of the results and the deviations of the models.
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