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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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Electromagnetic levitation
Kondys, David ; Červinka, Dalibor (referee) ; Martiš, Jan (advisor)
The thesis deals with the issue of magnetic levitation. It is divided into two main chapters. The first chapter is focused on a general introduction to magnetic levitation. It describes the types of magnetic levitation, their use and the principle of execution. The end of the chapter is focused on a more detailed description of magnetically levitated MAGLEV trains. It describes the history of these trains, their use and construction. The second chapter is focused on the design of a device for demonstrating magnetic levitation. First, it deals with the simulation of an electromagnetic problem in the FEMM program. In addition, for the selected position configuration of the electromagnet and levitating magnet, it describes the design of the construction of the device in SOLIDWORKS and its manufacture. The result of the work is an attempt to make such a device that can stably keep the levitating magnet in the air.
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Passive axial magnetic bearing
Dostál, Patrik ; Štěpánek, Vojtěch (referee) ; Pruša, Radomír (advisor)
The goal of the bachelor thesis is to measure the characteristics of a passive magnetic bearing. The practical part of the thesis consists of two segments – experimental measurement of properties of a passive axial magnetic bearing and a simulation of this bearing using the finite element method in the FEMM application. The simulation also dealt with the effects of temperature on the bearing. It was discovered that high temperatures considerably lower the axial stiffness of the magnetic bearing. Other effects on the stiffness of the bearing were taken into consideration, especially the dimensions of used magnets and the distance between them. The values that were determined by the experimental measurement and the FEMM simulation were mutually compared. The analysed bearing was built for use in a seal-less centrifugal pump. The values determined by the simulation and the measurement were applied to practical use in pumps. A part of the thesis was concerned with a research on passive magnetic bearings. The research dealt with the principle of the bearings, their structure and their application.
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Special bearing types and its application
Polášek, Lukáš ; Vrbka, Martin (referee) ; Koutný, Daniel (advisor)
The goal of this bachelor’s thesis is to provide a search analysis of special bearing types. This work is focused especially to magnetic and air bearings, which are the most available and used special bearings. Both of these types are contactless, from which follows a big part their benefits. In this thesis there are introduced and explained the principles and design solutions of the most frequently used types of magnetic and air bearings. At the conclusion there are written up advantages and possible uses of these bearings.
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Control of Magnetic Levitation Educational Model
Bednařík, Josef ; Brablc, Martin (referee) ; Matějásko, Michal (advisor)
The bachelor thesis deals with the modelling and control of the magnetic levitation CE 152 laboratory plant, which is specific in its nonlinearity and unstability. Firstly, all parts of the system are described by mathematical equations, which are the basis of the modelling of simulation model created in MATLAB/Simulink. Estimation of parameters is tackled by using the various of experiments and simulation’s model is validated with the real magnetic levitation system. Main body of the paper is focused on description and aplication of control on simulation’s and real model. It is realized by PID regulator, state regulator and feedforward regulator. In the last part of the thesis, the results are evaluated and compared among the all methods of control.
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Hyperloop – mirage or useful technology of the future? - A literature/information search study
Gerža, Martin ; Langerová, Petra (referee) ; Sedláček, Pavel (advisor)
Tato bakalářská práce je zaměřena na revoluční technologii zvanou hyperloop. Cílem této práce je shromáždění relevantních informací o konceptu hyperloopu. Práce se zabývá stručnou historií hyperloopu počínaje prvním konceptem hyperloopu, vysvětlením základní infrastruktury a výčtem technologií použitých v tomto konceptu. Dále jsou uvedené vybrané společnosti pracující na technologii hyperloopu spolu s jejich úspěchy a návrhy. Práci uzavírá výčet problémů a výzev, se kterými se vývoj hyperloopu potýká, projekty, které prochází vývojem a stručný pohled do budoucnosti.
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Apparatus for electromagnetic levitation
Kondys, David ; Vorel, Pavel (referee) ; Martiš, Jan (advisor)
This paper deals with magnetic levitation. It is divided into two main chapters. At the beginning of the first chapter, it discusses the types of magnetic levitation and describes their use in practice. It then focuses on the MAGLEV high-speed trains that use magnetic levitation. The second chapter is about the practical fabrication of equipment to demonstrate magnetic levitation. In the beginning, it discusses possible designs of magnetic levitation and evaluates this. Next, it simulates the chosen design and produces a graph from the simulations describing the force required to pick up a preselected object. It also discusses possible distance sensors that may be useful for this design. Finally, it describes the practical fabrication of the device design, i.e., the fabrication of the solenoid coil and the solenoid holder. Finally, it evaluates the measured values when the device is started.
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Electromagnetic levitation
Kondys, David ; Červinka, Dalibor (referee) ; Martiš, Jan (advisor)
The thesis deals with the issue of magnetic levitation. It is divided into two main chapters. The first chapter is focused on a general introduction to magnetic levitation. It describes the types of magnetic levitation, their use and the principle of execution. The end of the chapter is focused on a more detailed description of magnetically levitated MAGLEV trains. It describes the history of these trains, their use and construction. The second chapter is focused on the design of a device for demonstrating magnetic levitation. First, it deals with the simulation of an electromagnetic problem in the FEMM program. In addition, for the selected position configuration of the electromagnet and levitating magnet, it describes the design of the construction of the device in SOLIDWORKS and its manufacture. The result of the work is an attempt to make such a device that can stably keep the levitating magnet in the air.
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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.
|
|
|
Passive axial magnetic bearing
Dostál, Patrik ; Štěpánek, Vojtěch (referee) ; Pruša, Radomír (advisor)
The goal of the bachelor thesis is to measure the characteristics of a passive magnetic bearing. The practical part of the thesis consists of two segments – experimental measurement of properties of a passive axial magnetic bearing and a simulation of this bearing using the finite element method in the FEMM application. The simulation also dealt with the effects of temperature on the bearing. It was discovered that high temperatures considerably lower the axial stiffness of the magnetic bearing. Other effects on the stiffness of the bearing were taken into consideration, especially the dimensions of used magnets and the distance between them. The values that were determined by the experimental measurement and the FEMM simulation were mutually compared. The analysed bearing was built for use in a seal-less centrifugal pump. The values determined by the simulation and the measurement were applied to practical use in pumps. A part of the thesis was concerned with a research on passive magnetic bearings. The research dealt with the principle of the bearings, their structure and their application.
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