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Design of synchronous linear motor
Jindra, Michal ; Mach, Martin (referee) ; Knebl, Ladislav (advisor)
Proposed thesis is focused on synchronous linear motor with an iron core, the design of an equivalent magnetic circuit and its calculation. The work describes the principle of a synchronous linear motor with permanent magnets, U-channel linear motor and a tubular linear motor. For these types of linear motors, the design solution is described and general advantages and disadvantages are mentioned. The losses generated in the motors are also described. The work introduces various methods of engine calculations that can be used for subsequent application to a particular type of motor. Subsequently, one of the methods is selected and used to calculate the motor. The last part is the evaluation and comparison of results.
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Single phase induction motor start optimization
Glogar, Jaroslav ; Hájek, Vítězslav (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with the influence of capacitors on a start of a single phase induction machine and start optimization. The first two chapters refer to a theoretical part of the issue, describing construction, the function principle, the torque characteristic. Also used types are named there, a special emphasis is given to a split phase induction motor with the capacitor and auxiliary winding. It also describes the influence of the capacitor to a breakaway torque. The next part studies the analysis of the concrete machine by the laboratory measuring. Results of measured windings resistance, rated operation, load characteristic, mechanical losses and locked-rotor test are stated here. The main part of the thesis is dedicated to an optimization of wiring auxiliary winding, especially for breakaway torque. It is based on creating models in program ANSYS Maxwell, where an analytical calculation in module RMxprt and a calculation per finite element method (FEM) is realised. Three models are demonstrated here. The first one is identical with the measured machine, so with the permanent split capacitor. That model is created to be compared with the measuring. Another model has a capacitor start, and the last one has two capacitors – for start and run. For the last model the rotor cage with a reduced resistance of winding is used.
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Thermal analysis of a small induction machine
Holcman, Marek ; Toman, Marek (referee) ; Mach, Martin (advisor)
This thesis deals with the thermal analysis of a small asynchronous motor with a power of 600 W. The motor losses were determined first by the program RMxprt, and then by laboratory measurement. Temperatures in engine are calculated using the thermal resistance method. For analytical calculation of motor temperatures, a simple program was created using the Matlab computation program. Using the created program and determined losses, engine temperatures were calculated, which were then verified by measurement.
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Fuel Injection Analysis
Schnabl, Jan ; Mach, Martin (referee) ; Hájek, Vítězslav (advisor)
The ignition and injection system in any form are an integral part of each car. The development of these systems goes hand in hand with the development of the automobile and his growing industry. Since the nineteenth century to the present occurred in this sector signifcant progress. This thesis is focused primarily on the description of the two systems and their partiton. The development has been recorded from the oldest systems to the newest systems.
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Thermal model of high-speed induction motor
Světlík, Martin ; Mach, Martin (referee) ; Toman, Marek (advisor)
This thesis deals with thermal calculation of high-speed machines. Distribution of electrical rotating machine losses and calculation of mechanical losses in the air gap and on the ends of rotor is described in first part. Based on relationships taking into account rotor friction of the against the surroinding fluid are these calculations make. Literary search on theme of thermal calculation and principle of calculation thermal network method is descript here in the next part. Thermal network designed for specific machine and tabular of resulting temperatures are located in the last part.
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Skin effect in high-speed electrical machines.
Klíma, Petr ; Bárta, Jan (referee) ; Mach, Martin (advisor)
This master thesis deals with the suppression of the skin and proximity effects in high-speed machines. The first part summarizes the general knowledge of high-speed machines. The second part is devoted to the principle and possible suppression of consequences caused by skin and proximity effects. The third part shows the simulation results of models of a synchronous machine with permanent magnets. The results of these simulations reveal the consequences of skin and proximity effects. In addition, design measures are proposed to limit these and other undesirable phenomena to achieve the highest possible efficiency.
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Nonlinear models of DC machines
Král, Michal ; Mišinger, Lukáš (referee) ; Mach, Martin (advisor)
This bachelor thesis deals with modeling and simulation of DC motors. Four models of DC motors were created, according to four types of excitation ( derivative, serial, compound and separated). These models were designed in simulation program MATLAB & Simulink. Models were adjusted in order to respect magnetic non-linearity. Parameters for simulations were measured on real DC machine and the simulations were executed. This theses focuses on examination of temporary effects and comparing with real measured developments.
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Automatic design of synchronous machines
Fiala, Michal ; Mach, Martin (referee) ; Cipín, Radoslav (advisor)
This bachelor thesis deals with problematic of design of synchronous machines. First part is dedicated to descript function and structure of a synchronous machine. The next part describes an algorithm of design of wound rotor and permanent magnets synchronous machines. Based on the described method, the program for automated design of these types of synchronous machines was created in the programming environment Matlab. At the end of the thesis, there are described the results that were achieved within the work.
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Impact of rotor on a small induction machine efficiency
Stuchlý, Karel ; Janda, Marcel (referee) ; Mach, Martin (advisor)
The aim of this master thesis is optimization of the rotor in the terms of efficiency. An analysis of the effects of rotor parameters is performed by RMXPRT. A genetic algorithm is created to find the optimal solution. Solutions are evaluated and adjusted according to the results. Measurements on the actual machine are performed and evaluated to verify the functionality of the simulation models.
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