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Rotor design of a Line-Start Synchronous Reluctance Machine for Industrial Applications
Žíla, Jakub ; Knebl, Ladislav (referee) ; Bárta, Jan (advisor)
This diploma thesis deals with design of rotor of synchronous reluctance machines. There is a theoretical description of rotor geometry of synchronous reluctance machine that respects natural flow of magnetic flux inside complete rotor. The parametric model of rotor is made with usage of ANSYS Maxwell and Matlab software. Furthermore, the parameters of the machines are confirmed using the same program. Finally, changes of motor parameters are observed in connection with different rotor geometries.
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Design of linear motor with permanent magnets
Čech, Jan ; Bulín, Tomáš (referee) ; Knebl, Ladislav (advisor)
The first part of this thesis deals with the study of linear motors. The introduction of the thesis deals with the brief description of the linear motor, including its accessories. This part explains principle of linear motors, their general advantages and disadvantages. The next section contains an overview and division of the currently used linear motors. Each type of currently used linear motors is briefly introduced and also its principle and characteristics are described, including its specific application. The second part of the thesis deals with the design of an equivalent magnetic circuit model of a linear iron-core linear motor. Hereafter, the proposed design will be used to simulate the distribution of magnetic flux in the linear motor. The evaluated flux-density distribution in the air gap is later compared with the results obtained with finite element method. The thrust is then calculated from the flux-density and the estimated value is compared with the value listed in datasheet.
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Creation of GUI for optimization of electrical machines
Bártková, Tereza ; Klíma, Petr (referee) ; Knebl, Ladislav (advisor)
This work follows the development process of graphical user interface (GUI) spanning from choosing the right tools for implementation to the implementation itself. The purpose of the work was making the optimization program user-friendly by creating a communication layer between the optimization algorithm and the user and demonstrating its functions. First of all, the study of various programming languages and their toolkits regarding GUI programming was undertaken. Python was chosen because the original program is written in it, also software development in Python is probably the quickest one. Furthermore there are analyzed characteristics of this language and PyQt, which is a tool meant for GUI creation. The third chapter introduces very thoroughly the issues of electrical machines and their optimization. Introduction of these issues is followed by brief description of two optimization methods being used in electrical machines optimization. Following chapter introduces the actual machine under the optimization study, on which the final program was tested. Afterwards follows detailed description of application layout created in Qt Designer. New program structure enriched with graphical user interface is described and its functions are shown. Finally there is a guideline on how to use this program and the optimization is executed accordingly. Also, the results of the optimization are analyzed.
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Optimization of a small induction machine.
Jedlička, Lukáš ; Knebl, Ladislav (referee) ; Mach, Martin (advisor)
The goal of this thesis is to improve efficiency of an induction motor. In the first part, the working principle is described. The next part deals with the origin of losses and possible solutions to decreasing losses without impacting the production possibles. The third part of the thesis is focused on the calculation of parameters of a small serial production motor. In the fourth part, these parameters are verified using the analytical tool RMxprt which is included in Ansys Maxwell. The fifth chapter deals with the optimization using Matlab genetic algorithm. In the final chapter, the design modifications are verified using the method of finite element Ansys Maxwell 2D.
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Design of synchronous linear motor thermal network
Čech, Jan ; Toman, Marek (referee) ; Knebl, Ladislav (advisor)
The first part of this thesis deals with the study of linear motors. The introduction of the thesis deals with the brief description of the linear motor, including its accessories. This part explains principle of linear motors, their general advantages and disadvantages. The next section contains an overview and division of the currently used linear motors. The second part deals with the theoretical description of forms of heat transfer. The third part of the thesis deals with the design of an equivalent thermal circuit model of a linear iron-core linear motor with permanent magnet. Hereafter, the proposed design will be used to calculate the temperatures of the individual motor units. The temperatures are later compared with the results obtained with finite element method.
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Electromagnetic calculation of an electrical machine for Aerospace applications
Halašta, Vítězslav ; Knebl, Ladislav (referee) ; Bárta, Jan (advisor)
This bachelor thesis deals with the electromagnetic calculation of an electrical machine for aerospace applications. Description of the state of art trends that are currently being used in the aircraft industry and requirements for such machines were formulated. Further, electromagnetic model of the machine designed for aerospace applications is created and the electromagnetic calculation using the finite element method is performed. A design process and a comparison of machines designed for this application is also included. The modeled machine was simulated at no load, rated load and faulty condition. Reasons behind the choice of permanent magnet synchronous motor alongside particular steps in design required for machine application in aerospace are presented in the conclusion. There is also discussed, whether the modeled machine is correctly designed for aerospace application.
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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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Design of high speed permanent magnet synchronous machine
Přibyl, Daniel ; Knebl, Ladislav (referee) ; Ondrůšek, Čestmír (advisor)
Bachelor's thesis is focused on problematic of synchronous machines with permanent magnets. In this thesis is described the principle of function and design solution of the machine. Furthermore it deals with stator winding, possibility of placing magnets on the rotor and used types of permanent magnets. In the part of solution of the assignment of work is made design of synchronous machine with permanent magnets with output 1,5 MW and rated speed 15000 rpm. The machine is designed with inner rotor and magnets placed on surface. The solution includes design of dimensions of stator including design of slot, design of winding and design of permanent magnet. The whole analytical design was finally compared with the results of the analysis in the RMxprt program. For machine was calculated 2D magnetic field by finite element method in Ansys Maxwell. Finally was calculated critical speed.
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Design of high speed induction motor
Čech, Jiří ; Knebl, Ladislav (referee) ; Ondrůšek, Čestmír (advisor)
The first part of this paper presents general information about electromagnetic designing of an induction motor. Focus is on explanation of individual designing aspects and their effects on final motor parametres. Design principles for magnetic cores, slot dimensioning, stator winding and rotor squirrel cage are presented. Second chapter presents complete analytical computation of a given induction motor. Firstly several parametres need to be selected. Then sizing of stator and rotor is conducted. Secondly steady state equivalent parametres and related operating characteristics are computed. Following chapter consinsts of three final designs. In the last chapter results of mechanical analysis are presented.
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High-speed outer rotor synchronous machine
Král, Radek ; Knebl, Ladislav (referee) ; Klíma, Petr (advisor)
The master thesis deals with the construction and design of a high-speed synchronous machine with an outer rotor. The thesis is organised into three main chapters. The first chapter deals with machine design theory as well as mechanical limits, which are significant for high speed machines. This chapter also provides examples of applications of these electrical machines. In the second chapter, the initial design of the machine is calculated analytically. This machine design is optimised and the third chapter of this work shows the results of simulations using the finite elements method, including the evaluation of these results.
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