|
| |
|
|
Development of laboratory samples for wireless transmission of electric power based on the magnetic induction
Kopečný, David ; Štěpánek, Jaroslav (referee) ; Krbal, Michal (advisor)
The aim of the thesis is to collect the information about wireless transmission by using magnetic induction and about the current solutions of wireless applications in practice. The thesis includes theoretical basis and information about the current state of wireless power applications. This thesis is also focused on physical principle and draft of possible technical solution. On top of that, it also contains the information from some legislative and hygienic regulations. The second aim is draft of laboratory equipment on the base of gained information and its implementation for purpose of teaching and measuring. For this part was chosen topology of circuit and the specifications of resonance circuits. It resulted in producing a preparation, which consists of the exciter, primary circuit, secondary circuit and a module for measuring. The third aim is to take a measurement on this product and evaluation of characteristic from point of view of efficiency. Measured data were integrated into characteristics. The efficiency of transfer was measured depending on distance and used load. At the same time was also observed work frequency of product. Furthemore, another laboratory product was measured, in which was reached the efficiency more than 51%. The thesis is divided into four main chapters, which can be thematically named as follows: the information, the theory, the draft and the measurement. The first two chapters deal with the theory and characterization of technologies of already applied systems mainly from transport. The following two chapters contain the description of proposal of the product and the very measuring of the efficiency.
|
|
|
Winding diagnostics using surge test
Vojtěch, Pavel ; Šlezingr, Jan (referee) ; Drápela, Jiří (advisor)
Master‘s Thesis deal with analysis given to diagnostic method plus her applicability to failure detection electrical machine plus apparatus in different phases their live. A further realization physical model with subtransient generátor PSG204A 4kV, for teach – in disorder on single – layer air coil plus stator winding induction motor inclusive evaluation results test.
|
|
|
Electric induction furnaces in foundries
Bruštík, Josef ; Kaňa, Václav (referee) ; Šenberger, Jaroslav (advisor)
The main aim of this Bachelor thesis is to create a technical summary on the topic of “The electric induction furnaces in foundries” and be more closely familiar with this issue. A division of furnaces and ways of melting by particular types of furnaces are briefly described. On the basis of gained knowledge, an evaluation of economic and technical advantages of these melting devices was performed and subsequently it is recommended for further usage in the foundries.
|
|
|
Electronic RLC meter
Dvořák, Radim ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
This work deals with measurement methods of passive components R, L ,C used almost in every electrical circuit. Work describes progress of choosing the right methods for measurement and also the process of designing the autonomous RLC meter with use of ATMEL microprocessor chips. The RLC meter will be powered from rechargable battery and will be able to measure primary attributes of RLC components.
|
|
|
Metal detector for industrial use
Stehno, Rostislav ; Friedl, Martin (referee) ; Szabó, Zoltán (advisor)
The goal of this project is explore and study the ways of metal detecting and create a metal detector for industrial use. During a project development, the device size and user easy interface were the basic requirement. As a visual device was chosen LCD touch display, which is very important as a user-friendly interface. For math calculations and right function of device will be implemented microcontroller from Atmel corporation. As a data storage will be used a flash memory with 16MB of size. When the device were inventing, a lot of methods were studied and the impulse detect method were chosen which is the most perspective way of metal detecting. Device will communicate with PC trough a USB port. The device will have a battery which allows device to run for a few hours. The prototype of PCB were developed. Few mistakes has been discovered, while the device were constructed, but they were solved successfully.
|
|
|
Field strength measurement
Novák, Tomáš ; Dřínovský, Jiří (referee) ; Nováček, Zdeněk (advisor)
This thesis is focused on problems of measurement of field intensity especially in short-wave zone of received frequencies. To measure the intensity of electric field, it is necessary to use a suitable antenna whose properties and characteristics/parametres meet best the requirements of this measurement. These requirements are analysed/discussed in the introductory part of this thesis. From these requirements resulted one specific solution which is applicable to this problems. This solution is frame antenna which meets /matches best the requirements of this measurement. Furthermore, a complete suggestion for the frame antenna as well as its calculations were discussed. From individually calculated results graphical functionalities were set together that provided the bases for selection of suitable parameters for frame antenna. Then these bases were verified with similar antenna that was available. In second part of this thesis we modified standard antenna modul RFT FMA11 so that there would be a possibility to use it with any selective microvoltmeter.
|
|
|
Velocity pickup
Konečný, Jan ; Pikula, Stanislav (referee) ; Beneš, Petr (advisor)
This bachelor thesis deals with a proposal of a sensor for measuring relative oscillation of two interacting surfaces. The thesis describes two possible solutions with their advantages and disadvantages, and a patent research. The main part of this bachelor thesis concentrates on inductive position sensor – its attributes and practical proposal.
|
|
|
Inductive position sensor
Volf, Lukáš ; Vorel, Pavel (referee) ; Huták, Petr (advisor)
In the beginning is given an overview of sensors and their separation and properties. This work also deals deeper with inductive sensors. The work is designed for evaluation of the oscillator circuit (binary inductive sensor), its practical implementation, measuring the sensing range of different metals and measurement evaluation. For those interested, here is a list of literature.
|
|
|
Planar Circuits Elements on Low Temperature Cofired Ceramics
Kosina, Petr ; Dřímal, Jiří (referee) ; Kolařík, Vladimír (referee) ; Šandera, Josef (advisor)
The present work deals with the design and manufacturing of 3D structures in LTCC (Low Temperatue Cofired Ceramics) technology. To use this technology LTCC workplaces have been designed and technological processes for high quality reproducible production were suggested. Technological possibilities of low temperature co-fired ceramics were demonstrated in the design and manufacturing of pressure sensors, electrode systems for ozone generators, planar circuit elements (coils and transformers) and in the design a special package for middle-power terahertz modulator. Design of selected parts of respective devices was proved by simulations in COMSOL Multiphysics. The work provides new insights into the structure of power integrated circuits sleeves and structure of electrode systems for different types of electrical discharges. Results of this work can contribute significantly in the application of planar circuit elements, in the development of different types of sensors, in the design of atypical types of packaging or in the design of electrode systems for capacitive coupled electrical discharges.
|
guest ::
