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Design of DC motor for teaching
Hajdú, Zsolt ; Huzlík, Rostislav (referee) ; Vlach, Radek (advisor)
The topic of this bachelor thesis is Design of DC motor for teaching. The main goal of this bachelor thesis was to create an electric motor that uses direct current, commutator brushes, and permanent magnets to generate torque. Another goal of this bachelor thesis was to achieve 50W of power at 100rad/s. We also set a secondary goal to achieve 50% efficiency across the entire speed range. To create the theoretical model, we used Fleming's right-hand rule. Using this principle and based on calculations, we constructed the motor. The main power source was a car battery. After constructing the motor, we measured its parameters and compared the obtained values with the theoretical ones.
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Motorcycle wheel force transducer
Krišpín, Jakub ; Drápal, Lubomír (referee) ; Tobiáš, Martin (advisor)
This thesis deals with the design of a driven motorcycle measuring wheel. The wheel is designed for a KTM RC 390 motorcycle but can be used on another motorcycle if the centre section is replaced. The wheel is designed to measure torque and longitudinal and vertical force, which is very useful for analysing the dynamics of the motorcycle. The measurement systems designed to measure the forces and moments on the wheels of the vehicles are introduced in the beginning of this thesis. Furthermore, the wheel design for the selected motorcycle is presented including the optimization of the wheel spoke shape. The optimized shape creates a region of homogeneous stress where strain gauges are installed to measure torque. Subsequently, structural analysis is performed in Ansys software using FEM. It verifies the structure in terms of strength. Then suitable strain gauges are selected and their wiring is designed. The proposed measuring wheel should serve as an alternative to commercially available measuring systems which are very expensive. The material cost of the presented wheel is approximately 78 thousand CZK.
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The design of table belt sander
Šimčík, Jaroslav ; Pavlík, Jan (referee) ; Bradáč, František (advisor)
Jaroslav Simcik The design of table belt sander BP, Institute of production machines, systems and robotíce, 2008, p. 41, fig.19, appendices 15 This bachelor´s thesis belongs in the domain of wood-working engineering with a direction on a construction of a belt sander. The surface speed of a abrasive belt has to be 11 metre per second.
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Analysis of specific systems of bodies with neutral bonds
Grúz, Jan ; Hájek, Petr (referee) ; Majer, Zdeněk (advisor)
This thesis deals with analytical and graphical solution of three specific systems of bodies that are in static equilibrium. These systems of bodies contain neutral bonds. The opening part dedicates to theory and principles of solution of contact forces in bonds, which are further used for calculations and graphical solutions. The first system of bodies is a demonstrative tappet mechanism which was created for demonstration of some methods of graphical solution. The second system is inspired by lifting mechanisms in production lines. The aim is to find out the magnitude of contact forces for different positions of the lifted weight and a minimal torque of the propulsion. For solving the third system of bodies, principles of statics and hydrostatics are used. The aim is to find out the minimal magnitude of force for activating the mechanism. All systems of equations are solved in Matlab.
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Analysis of dynamic load from induction machine current signature
Pavláček, Jan ; Ondrůšek, Čestmír (referee) ; Huzlík, Rostislav (advisor)
This thesis focuses on the analysis of the dynamic behavior of the load from the measurement of stator currents of induction motor. Work is sorted from basic engine failures equations, mathematical models, types of signal processing, simulation and measurement. The practical part deals with the design of the motor model in Matlab Simulink, the simulated and the measurement of the pump BETA 12 YC On the Department of Fluid Engineering Victor Kaplan. Use appropriate types of signal processing evaluate the results. The aim of this work is to analyze the dynamic changes of the load.
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Dynamic simulation of DC motor using FEM
Gottwald, Michal ; Huzlík, Rostislav (referee) ; Vítek, Ondřej (advisor)
My diploma thesis deals with a specific dynamic model of DC motor with the parameters obtained from the calculation and from the program using the finite element method. It shows how much accurate results can be achieved in the model, if you use only the values which can be measured, recorded and calculated on the engine. This thesis contens three parts. First part describes the structure and function of DC motor and the basic principle and the use of FEM. Next is calculation analytical and numerical parameters. The search parameters include torque, resistance and inductance of armature winding, resistance and inductance of excitation windings. The last part is dedicated to creating a dynamic model. Results from the dynamic model and measured values are compared in the conclusion of my thesis.
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Efficiency Improvement of Small Induction Motors
Vilím, Martin ; Veselka, František (referee) ; Hájek, Vítězslav (advisor)
In this bachelor´s thesis I discuss about asynchronous engines in general, describe their construction and principle of operation, using. It also includes measurements of a specific motor and design engine. The first part deals with theprinciple of the engine options including the fundamental control over speed and torque. The second part deals with the measurement of the size of the searchengine and losses. The last part provides a proposal for a new induction motor.
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Intake system for internal combustion engines
Hadrava, Martin ; Zháňal, Lubor (referee) ; Vančura, Jan (advisor)
The bachelor’s thesis is focused on the internal combustion engine intake systems. Emphasis is placed mainly on the construction and the various parts of the intake systems. The part of the work is also devoted to the different types of supercharging. At the end, the individual parts of the intake system are described further.
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Optimization of the existing construction of magnetorheological clutch
Bedřich, Miroslav ; Růžička, Bronislav (referee) ; Roupec, Jakub (advisor)
This work deals with the reconstruction of magnetorheological (MR) clutch. The extensive research on the use of magnetorheological technology in practice was developed in the first part. The function of MR dampers, MR brakes and MR clutches were described. Some parameters of MR clutches were listed and compared. The second part concentrates on construction modifications to improve some parameters of MR clutch. The experiments verifying improvement of operating parameters of MR clutch were carried out in the third part.
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