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Coilgun
Martiška, Filip ; Dvorský, Adam (referee) ; Tomíček, Pavel (advisor)
Táto práca sa zameriava na gausovu pušku, tiež známu ako reluktančná coilguna, čo je elektromagnetický urýchľovač, ktorý využíva elektromagnetickú indukciu a reluktanciu na pohon projektilu. Počiatočná časť tejto štúdie vysvetľuje základné fyzikálne princípy fungovania coilguny, vrátane elektromagnetickej indukcie a reluktancie. Následne práca skúma rôzne konštrukčné faktory, ktoré ovplyvňujú výkon coilguny. Nakoniec boli vykonané merania, postavený prototyp a uskutočnená optimalizácia.
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Design and setup of an experiment to verify the interaction of a magnetic field with a flowing liquid
Sikora, Petr ; Himr, Daniel (referee) ; Fialová, Simona (advisor)
This thesis deals with the design of a magnetic circuit in order to experimentally verify the effect of an electromagnetic field on a cavitating liquid. In comparison to previous research, this paper presents a comprehensive analysis of this interaction using non-equilibrium thermodynamics. In addition, the theoretical part also focuses on selected topics from electromagnetic field theory with respect to the problem at hand. Based on this research and using FEM software for 2D (FEMM) and subsequently 3D problems (Ansys Maxwell), two models of the magnetic circuit were designed, optimized and built. The final assembly was then used in an experiment. The presence of chemical compounds with disinfectant effects was determined from samples of the affected liquid. Finally, the electrical voltage induced on the electrodes attached to the measuring circuit was also measured.
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Evaluation of physical fields in a landscape locality
Jílek, Michael ; Králík, Martin (referee) ; Smital, Lukáš (advisor)
The thesis is focused on gathering of theoretical backgrounds for geomagnetic measurements, measurement of electromagnetic and radiometric quantities in a natural locality, and subsequent evaluation of the obtained results from the point of view of their interrelations and in the context of hygienic regulations. All the theoretical backgrounds of each field are assigned to the measurement methodology and appropriate measuring technique, selected according to information from available sources. Appropriate instruments, landscape location, measurements were made, the results were evaluated and interpreted. The result is graphical output in the QGIS geographic information system.
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Evaluation of physical fields in scenic area
Jílek, Michael ; Smital, Lukáš (referee) ; Rozman, Jiří (advisor)
The thesis is focused on gathering of theoretical backgrounds for geomagnetic measurements, measurement of electromagnetic and radiometric quantities in a natural locality, and subsequent evaluation of the obtained results from the point of view of their interrelations and in the context of hygienic regulations. All the theoretical backgrounds of each field are assigned to the measurement methodology and appropriate measuring technique, selected according to information from available sources. Appropriate instruments, landscape location, measurements were made, the results were evaluated and interpreted. The result is graphical output in the QGIS geographic information system.
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Hybrid magnetic bearing design
Šindelář, Petr ; Bárta, Jan (referee) ; Rúra, Dávid (advisor)
The thesis deals with the design of a hybrid magnetic bearing. This is an extension of the issue of common bearings in high-speed motors. The work is divided into three parts. A general theory of magnetic bearings is described in the first part. The second part deals with the mathematical description of the bearing. A proposal of specific hybrid magnetic bearing is described in the third part. The bearing for the motor was already designed. It is a 45000rpm motor with a power output of 12 kW. This thesis aims to create a design of hybrid magnetic bearing with magnets to create a permanent magnetic field and coils to regulate forces to stabilize the rotor and limit vibrations. The practical design includes mathematical calculation in Matlab and computer simulation based on the finite element method in ANSYS Maxwell.
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SNOM probes with special properties
Slabý, Vít ; Kalousek, Radek (referee) ; Spousta, Jiří (advisor)
This bachelor thesis deals with scanning near-field optical microscopy. With SNOM we examined experimentally the near field of the interference of surface plasmon polaritons (PPP) on plasmonic structures consisting of slits in a metal layer a we discuss the effect of probe characteristics on the measurement results.Effect of few characteristics is simulated numerically. Findings obtained in the previous experiments are used for the construction designing of an experimental device called NanoGIS, which should serve for the nanostructure manufacturing.
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Design of magnetic bearing for pump
Pruša, Radomír ; Ondrůšek, Čestmír (referee) ; Huzlík, Rostislav (advisor)
The aim of this thesis is to design a magnetic bearing system for a pump. The use of magnetic bearings is based on the necessity of preventing the contact of the pumped fluid with a lubricant. The designed passive bearing consists of three axially polarized annular magnet using repulsive magnetic forces. The designed eight-pole radial bearing is formed by a laminated stator with salient poles and two-layer concentric winding. The rotor of the bearing is hollow because it also serves as a liquid supply of the impeller to centrifugal pump. The design of both bearings is based on the finite element method from the software ANSYS Maxwell. The results from simulating the axial bearing forces have been compared with the values obtained from experimental laboratory measurements. The component stress has been verified by implementing the function of stress analysis in Autodesk Inventor. The work includes research on the topic of constructing active and passive magnetic bearings.
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Drive for seal-less pump
Pruša, Radomír ; Kurfurst,, Ing Jiří (referee) ; Ondrůšek, Čestmír (advisor)
The aim of this thesis is to design a drive for seal-less centrifugal pump. Designed motor with axial magnetic flux is a double-sided structure with an internal coreless stator. The construction of the seal-less pump is based on a patent no. 17818, which was created at the Victor Kaplan Department of Fluid Engineering BUT. Potential use of this assembly is mainly in the food industry, possibly in the field of chemically aggressive liquids. The whole design is based on coordination between analytical equations and finite element method of the software ANSYS Maxwell. The temperature ratios inside the motor were investigated when cooling with air by the iterative solution of thermal circuit. The work includes research on the topic of constructing the axial machines and their applications in pumps. A comprehensive specification of the entire seal-less centrifugal pump is given in Chapter 4.
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