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Design and electromagnetic calculation of small power wound field synchronous machine
Laštovička, Josef ; Vítek, Ondřej (referee) ; Bárta, Jan (advisor)
The topic of this bachelor thesis is the issue of synchronous machines with a wound rotor and their design. The first part of the work summarizes the theory of synchronous machines with a wound rotor. A more detailed focus is given to salient pole machines. The second part summarizes specific steps in designing a machine with a wound rotor. The third part is to create a program for calculating a salient pole synchronous machine. The program is based on knowledge gained in the first and second parts using the Python programming language. The fourth part focuses on electromagnetic design, its optimalization, simulations and interpretation of their results. The last part contains technical production documentation and machine model.
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Ventilation calculations in synchronous machine
Judas, Jan ; Deeb, Ramia (referee) ; Janda, Marcel (advisor)
The aim of the project was to get familiar with the environment of ANSYS CFX, create several models of fans and synchronous machine model in Autodesk inventor, create model of cooling medium flow through the machine with these fans and evaluation of results. Firstly the thesis describes the synchronous machine itself, losses of the machine, the flow of power of synchronous machine and methods of its cooling. Next the thesis describes each kind of heat transfer, laminar and turbulent flow. The thesis also refers of kind of the fans and the program used to calculate the flow Ansys CFX, including the method that Ansys used to calculate. The work describes the individual modification of fans and setting of calculation in ANSYS. Then displays the results of the analysis these fans for different numbers of fan blades and for modification of the fan. Then the thesis analyzes selected modifications due to changing speed. In the last chapter shows the analysis of flow in the machine with three different fans. In particular, there is shown the mass flow rate, pressure and its distribution on areas for evaluation.
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DSP56800 microprocessor line usage for asynchronous motor control
Kukuczka, Adam ; Huták, Petr (referee) ; Klíma, Bohumil (advisor)
Tato diplomová práce pojednává o možnostech simulace a modelování elektrických pohonů na základě Bondových grafů. Je zde uvedena základní teorie k problematice. V práci jsou představeny modely stejnosměrného a synchronního stroje sestavené touto technikou. Dále je zde seznámení s Freeware knihovnou Bondových grafů BG V2.1 k programu MATLABSimulink. Za pomocí této knihovny byly sestaveny oba modely strojů. V poslední kapitole je uvedeno srovnání modelování na základě teorie Bondových grafů s modelováním v blokových diagramech.
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Effect of Manufacturing Variations of Permanent Magnets in Surface-Mounted Permanent Magnet Motors
Vícha, Adam ; Mach, Martin (referee) ; Bárta, Jan (advisor)
Master’s thesis summs up issues of mounting pemanent magnets on rotor surface of permanent magnet synchronous machine. Literature reseach is divided in two parts. First one shows studies and experiments researching the impact of manufacturing tolerances of permanent magnets and wrong mounting on the rotor on cogging torque . The second part focus on analytical aproach of defining influence of permanent magnets on magnetic flux density in the air gap and phase induced voltage. Practical part focus on design of a prototype machine, wich will be used to research the impact of tolerances and imperfections. Parametric model of the prototype machine is created in Maxwell and is subjected to analysis via finite element method. Three different analysis were run, offset of permanent magnet, decrease and wrong dicertion of magnetization. At last the result of cogging torque and induced voltage are compared.
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Analysis of the stator and rotor pack termination effect on the synchronous machine by FEM
Michailidis, Petr ; Valenta, Jiří (referee) ; Skalka, Miroslav (advisor)
This thesis deals with simulation’s possibilities of the electromagnetic fields in electrical machines. A finite element method is the final element technique. The content of this thesis is a model and mesh creation and electromagnetic simulation of synchronous machine. The stator and rotor pack termination effect on the synchronous machine.is analyzed by finite element method in ANSYS program. The type of the stator termination pack is described by four segments. The magnetic field distribution is deformed due to the material properties of used segments. In the next part a methodics of mesh creation is shown. The mesh quality (in term of elements number and elements shape) is important due to the solution accuracy and speed.
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Calculation of 50kW permanent magnet synchronous motor
Šatava, Patrik ; Cipín, Radoslav (referee) ; Vítek, Ondřej (advisor)
This master’s thesis deals with a permanent magnet synchronous machine calculation. In the first part of the thesis, the synchronous machine in general is described. Knowledge of these machines is essential for the remaining parts of the thesis. In the next part, an analytical calculation process of a given permanent magnet synchronous machine is presented. The given machine had already been manufactured before the thesis assignment. The calculation is to be adapted to the given machine. This way the parameters of the calculated machine should match the reference machine. The accuracy of the calculation can then be evaluated. Furthermore, calculations of the machine using Ansys RMxprt and Ansys Maxwell 2D are presented. The calculations are then compared with data obtained by measurements performed on the given machine. In the last part of the thesis, a modification in the analytical calculation is made to reduce the inaccuracy of the calculation. The thesis is concluded by evaluating the results.
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Design and electromagnetic calculation of small power wound field synchronous machine
Laštovička, Josef ; Vítek, Ondřej (referee) ; Bárta, Jan (advisor)
The topic of this bachelor thesis is the issue of synchronous machines with a wound rotor and their design. The first part of the work summarizes the theory of synchronous machines with a wound rotor. A more detailed focus is given to salient pole machines. The second part summarizes specific steps in designing a machine with a wound rotor. The third part is to create a program for calculating a salient pole synchronous machine. The program is based on knowledge gained in the first and second parts using the Python programming language. The fourth part focuses on electromagnetic design, its optimalization, simulations and interpretation of their results. The last part contains technical production documentation and machine model.
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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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Design of 3 MW high-speed permanent magnet synchronous motor
Bořil, Michal ; Bárta, Jan (referee) ; Vítek, Ondřej (advisor)
The thesis theme is the design of 3 MW high-speed permanent magnet synchronous motor. The work is divided into several parts, and contains the information given on the topic. The first part lists trends and new technologies of high-speed electric machines, and the issues and construction of high-speed synchronous machines are also listed here. In the second part, the machine is analytically designed from the specified values, which is then modelled in the RMxprt program. In the penultimate part, the engine is simulated by programs that are included in the ANSYS Electronics Desktop package, they are RMxprt and Maxwell. The modified engine model in RMxprt is simulated using defined formulas and then converted to Maxwell 2D, where the engine is simulated using the finite element method. In the last part, the results from the analytical calculation are compared with other high-speed machines. In addition, the results of simulations from RMxprt and Maxwell were compared in the last part.
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