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Insulation system of synchronous and induction motors for 18kV
Šporcr, Viktor ; Vetiška, Vojtěch (referee) ; Ondrůšek, Čestmír (advisor)
Bachelor’s thesis is divided into two separate sections. First part is concentrated on insulation system of high voltage machines impregnated by vacuum pressure impregnation. This part of semester thesis concisely describes the composition of individual components used for construction insulation systems of air and water cooled rotation machines. Second practical part contains evaluation of dielectric resistance of coil set with insulation system designed for voltage level 18 kV. This part contains a short description of used insulations. Further includes a report of dielectric tests of used coil set. This set of coils was tested on following tests. Heating measurement semi conductive tape with infrared camera at impulse voltage. The coils was exposed to impulse voltage for one 100 hours and sinus voltage for one 1000 hours. Before and between, aging was measured value of charge partial discharges and dissipation factor.
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Two-quadrant switching current source for inductive loads
Húsek, Jan ; Chmelař, Milan (referee) ; Hanák, Pavel (advisor)
This master`s thesis deals with design and realization of two-quadrant switching current source for inductive loads. Output current adjustable range is 0 – 1A. Selected topology enables change of current direction. Current supply is made with TDA8920 integrated circuit. Thesis also contains basic information about switching supplies and coils.
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Measurement and recording of the initial magnetization curve and hysteresis curve of ferromagnetic materials
Tran, Quoc Bao ; Vaněk, Jiří (referee) ; Klvač, Ondřej (advisor)
This thesis deals with the measurement of primary magnetization curves and hysteresis loop. The thesis is divided into two parts, the theoretical part and the practical part. The theoretical part describes the creation of magnetic field in materials, excitation of magnetic field by electric current or excitation of electric current by changing magnetic field. The practical part is focused on designing, construction and testing of amplifier and the measurement and displaying of hysteresis loop. In the end of the thesis is summarized what results were achieved.
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Planar Structures for High Frequency Band
Pulec, Jiří ; Pietriková, Alena (referee) ; Maschke, Jan (referee) ; Szendiuch, Ivan (advisor)
The present paper deals with the problematics of the design and technology of planar microelectronic structures for the hign frequency band. These structures were realised on the Department of Microelectronics and their properties were measured on the Department of Radioelectronics. The part of this work is also simulation of some microelectronic structures, where for these simulations the design and simulation tool Ansoft Designer and the FEM tool ANSYS was used. The attention is paid to the discrete devices (coils and capacitors) as well as to the more complex structures (frequency filters). The paper yields the new findings in the field of the design and technology of the discrete components as well as of the more complex systems, these findings can be used as the basis for another research of practical applications.
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Description Methods for Electrical Systems and Their Solving
Křižka, Jakub ; Němec, Zdeněk (referee) ; Šeda, Miloš (advisor)
The objective of bachelor thesis is a searching description of methods, which are usually used for calculation of circuit variable values in electric circuits. At the beginning is thesis concerning with description of individual components (power supplies, electronic components) used in electric circuits, then also with analysis of rules, which are the fundamental for a calculation of values in electronic circuit – Ohm’s rule and Kirchhoff’s rules. Indivisible part of thesis is also summary of special methods, such as method of loop currents (mesh analysis), method of nodal voltage (nodal analysis) etc. and their demonstration on examples of electric circuits. The structure of thesis is coursebook and gives successive summary of information in area calculations of electric circuits.
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System of controlled generators of rectangular pulses
Holeksa, David ; Mišurec, Jiří (referee) ; Hanák, Pavel (advisor)
This bachelor thesis deals with the design system of controlled generators of rectangular pulses, which are burdened with toroidal coils. The objective is realization of the equipment to be controlled by a microcontroller, which will bring rectangular pulses to each coil according to pre-specified parameters. The resultant generator is capable of generating current pulses having an amplitude of 0.1 to 1 A and a pulse time of 1-10 ms.
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Trailer frame VARIANT for transport cabel spools
Buchta, Vladislav ; Kašpárek, Jaroslav (referee) ; Kašpárek, Jaroslav (advisor)
Thesis deals with the truck frame VARIANT 252. The main task is to analyze weighting states, setting the values for weigting states. Strength control of the frame by using the Finite Element Method (FEM). And each subsequent frame adjustments based on the results of FEM. Part of this thesis is also the drawing documentation provided a modified frame assembly and each modified components.
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Design of a prototype table winder for linear coils
Ryza, Vojtěch ; Hrabčík, Miroslav (referee) ; Řehák, Kamil (advisor)
The diploma thesis deals with the design of a prototype table winder for linear coils. The first part of this work describes the basic properties of the coil and its winding methods. In the following section, a critical search was made of the reels available on the market based on which the reel concept itself was created. The work describes in detail the procedure of the winder design together with the design variants of the individual parts of the winders. At the end of the diploma thesis is presented the needed prototype of the coil winder. This problem was solved by using the 3D program SolidWorks and FEM in the program ANSYS Student. The project describes the individual steps of the design of the concept of a prototype linear winder and the component's design.
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Small Coil Winding Machine
Ihnát, Kryštof ; Friedl, Martin (referee) ; Szabó, Zoltán (advisor)
This work is about designing a small coil winding machine for the school workshop. The first part consists of market research, a comparison of winders, and an explanation as to how they work. It is followed by short chapter about the inspiration for the design and construction. It also includes the parts that were used as well as peripheries. These include the most important component; stepper motors. In the next part, the prototype and subsequent revisions are described, as well as the most important parts of the code and construction of the coil winder itself and it's parts. In the end, there is chapter about it's operation.
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Magnetic fields for biomedical experiments
Otýpka, Jan ; Cipín, Radoslav (referee) ; Patočka, Miroslav (advisor)
In this work deals with magnetic fields for use in biomedicine. This solution involves the choice of the correct geometric arrangement of coils for generating magnetic field with a homogeneous distribution of magnetic induction of the widest possible area. The paper compares thre traditional types of coils, solenoid, toroid and Helmholtz coil. For Helmholtz and solenoid coil and is then carried out an analysis of the magnetic flux density in the inner space. Next part is devoted to electrical resonance in the LC circuit. This is then utilized for the development of pulsed magnetic field in the Helmholtz coil. It summarizes the theoretical and practical knowledge to design and construction of resonant converters. The end is devoted to the measurement of circuit parameters and verification of theoretical knowledge.
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