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Measurements of electromagnetic interference in anechoic and semi-anechoic chambers
Deneš, Roman ; Růžek, Václav (referee) ; Dřínovský, Jiří (advisor)
This thesis is focused on a detailed analysis of the mechanisms of electromagnetic wave propagation in anechoic chambers. The analysis takes into account the influence of the measurement distance, setup of anechoic chamber and other parameters. Furthermore, the work deals with a validation of both types of anechoic chambers and examines the impact of selected parameters on the measurement results. Based on the theoretical analysis and practical measurement, the comparation between semi and fully anechoic chamber, or a three and ten meter measuring distance was made. This thesis also contains a detailed analysis of sources of the uncertainty.
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Electromagnetic compatibility of tram equipment
Gavshin, Ruslan ; Jarolín, Zdeněk (referee) ; Drápela, Jiří (advisor)
This diploma thesis deals with the issue of EMC of tram vehicles and traction system. The first chapter defines the issues that are then dealt with in the thesis. The next chapter lists the objectives of the work. Subsequent chapters analyze the issues described in chapter 2. In the last chapter, a flow chart is proposed, which should serve as a tool to estimate the hazards of the traction drive due to induced bearing currents.
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Virtual Measurement System for the Anechoic Chambers
Váško, Ondřej ; Soldán, Josef (referee) ; Dřínovský, Jiří (advisor)
Master thesis examines a selected part of electromagnetic compatibility. In this work, there is theoretically discussed how electromagnetic interference appears and how is spread through free space environment. To eliminate ambient interference signals, the measurements have been performed in anechoic chamber where the undesirable interference signals were suppressed. In the thesis, there are also described parameters of EMI receivers and limits of electromagnetic interference. The description of calculations of the antenna height for finding maximum intensity of electric field strength for standard measurement distance has been made. For proposed transformed measurement distance, calculations of intensity electric field with addition of parameters measuring antenna and object under test were performed. Correction curves for conversion intensity electric field have been obtained as the result.
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Monitoring interference in the mains supply
Jirčík, Zdeněk ; Kubánek, David (referee) ; Zeman, Václav (advisor)
This semester thesis describes design of electronic device adapted to monitoring of mains supply. Theoretical parts describes mains supply analysis, communication and management of files to memory. Next part is design electronics blocks and their cooperation. There are description of mains analyzer prototype and it’s parts and functions. Prototype was submitted to test measurement.
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Antenna preamplifier for EMI measurements
Sedlák, Milan ; Urbanec, Tomáš (referee) ; Dřínovský, Jiří (advisor)
The master thesis deals with the design of a low noise preamplifier operating in the frequency range from 30 MHz to 1 GHz, usable for measuring and testing of electromagnetic interference in the electromagnetic compatibility test rooms. The introductory, theoretical, part is focused on the analysis and description of the necessary properties of the low noise preamplifier required for the subsequent design. The practical part deals with the selection of suitable components, simulation, design and subsequent realization of low noise preamplifier. At the end of the thesis the design and the final verification measurements are described and discussed.
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EMS Testing
Dušek, Michal ; Hoder, Karel (referee) ; Havlíková, Marie (advisor)
The bachelor thesis deals with electromagnetic compatibility. Beginning of this thesis is devoted to general problems of EMC. Next part refers of the various tests for robustness. The next chapter deals with device Seaward Mace and a more detailed description of the resistance tests. The last part describes the test apparatus and implementation tests in the laboratory measurement of the Institute of Electrical Control and Instrumentation FEEC
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Testing and measurement EMC
Bartoň, Jiří ; Hoder, Karel (referee) ; Havlíková, Marie (advisor)
This bachelor thesis is focused on a problem field of electronic compability as a whole - both the technical and biological side. Each legislative requirements and regulations of EMC are analyzed in this thesis Part of thesis is to design a test procedure for verification of EMC information technology equipment (ITE). Practical work is devoted to an overview and implementation of EMS according to the applicable test standards in the laboratory measurement of the Institute of Electrical Control and Instrumentation FEEC and services in the Research Institute in Brno.
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SAE J2716 SENT protocol signal driver
Mutina, Petr ; Levek, Vladimír (referee) ; Prokop, Roman (advisor)
This diploma thesis deals with design of SENT protocol output driver for automotive applications. Output driver is designed with respect to variability of output capacitance (in rage from 0 to 10 nF). Important feature of output driver is output signal shaping to limit electromagnetic interference. First chapter deals with theoretical analysis, current solution is discussed too. Second chapter of this thesis is focused on design of concept. In third chapter design of output driver is discussed, in last chapter simulation results of the design are presented.
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Numerical analysis of the lightning on small aircraft
Krutílek, David ; Ochodnický, Ján (referee) ; Dražan, Libor (referee) ; Raida, Zbyněk (advisor)
This dissertation deals with the numerical analysis of effects of a lightning strike on an aircraft and with the design of the optimal composition of the composite structure in terms of lightning strike protection. When optimizing the composition, a simplified model of the composite nose section of an EV-55 aircraft is used. The optimization of the composite structure is based on results of experimental measurements and testing. On the simplified model of the nose part, the material composition of the composite is verified and the direct and indirect effects of the lightning discharge are numerically estimated
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Electromagnetic compatibility of tram equipment
Gavshin, Ruslan ; Jarolín, Zdeněk (referee) ; Drápela, Jiří (advisor)
This diploma thesis deals with the issue of EMC of tram vehicles and traction system. The first chapter defines the issues that are then dealt with in the thesis. The next chapter lists the objectives of the work. Subsequent chapters analyze the issues described in chapter 2. In the last chapter, a flow chart is proposed, which should serve as a tool to estimate the hazards of the traction drive due to induced bearing currents.
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