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Analysis of steel grade influence on small induction machine efficiency
Plíšek, Oldřich ; Klíma, Jiří (referee) ; Mach, Martin (advisor)
The theoretical part of the bechelors thesis examining the impact of the material of the magnetic circuit on the efficiency of induction motors is devoted to analysis of the induction motor and its losses. It also describes the measuring, including calculations of individual losses. Another theoretical part examines the impact of specific losses on the magnetization characteristics of assessed laminations. The practical part includes laboratory measurements of single phase and three phase motors ATAS Electromotory Náchod brand with multiple types of laminations. Measured values are used to calculate individual losses, which are later mutually compared. Models of measured motors with multiple types of laminations are simulated with the aid of ANSYS Maxwell RMxprt program. Analysis of engines with specific types of laminations are performed with the aid of analytical calculations. Results of calculations are compared with simulated and measured values.
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Application of the multi-axis milling of a shaped part
Klíma, Jiří ; Sedlák, Josef (referee) ; Píška, Miroslav (advisor)
This diploma thesis focuses on the design and production technology of making pattern and core box by milling. The theoretical part summarizes the issue of production models, CAD / CAM technology and milling technology. The practical part is elaborates engineering design of machined parts focused on the specific requirements for application in the foundry. For designing of milling technology was used CAM system. This milling technology was programmed and optimized. Parts are finally produced on 3-axis milling machine. In the end there is technical-economic evaluation of production and discussion of results.
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Possibilities of improving efficiency of high-speed electrical machine
Nevrzal, Filip ; Mach, Martin (referee) ; Klíma, Jiří (advisor)
First part of this bachelor´s thesis briefly presents basic construction and principle of induction machine, distribution and description of individual losses. In the next part, there is a close look at the measurement of given machine. Next, there is a description of making a model in RMxprt and subsequent comparison of simulated data and characteristics to measured data. Last part describes and compares proposed changes of this motor simulated in RMxprt.
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Measurement and analysis of high speed squirrel cage induction motor
Kaczmarczyk, Ruben ; Mach, Martin (referee) ; Klíma, Jiří (advisor)
The thesis is focused on familiarization with classical asynchronous and high-speed motors, their construction and principle. There are also described constructional peculiarities of the high-speed motor and comparison of losses between both motors. Then, on the basis of production documantation a simplified calculation of the particular asynchronous motor is made. Analytical calculation is also made in RMxprt program after setting of all given parameters of the motor. Experimental measurment upon the laboratory sample for the verification of given qualities is also embodied in the bachelor thesis.
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Simulation of electric machines
Klíma, Jiří ; Mišinger, Lukáš (referee) ; Mach, Martin (advisor)
This thesis deals with modeling and simulations of DC and AC machines. They were created by four mathematical models. Three models of DC motors with different type of excitation (compound, serial, derivative) and one model for asynchronous motor. All models were implemented in MATLAB & Simulink. After measuring and setting the basic parameters of the machines, simulations were running. Simulation results are then compared with measured waveforms.
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Optimizing design of electric machines
Šporcr, Viktor ; Klíma, Jiří (referee) ; Janda, Marcel (advisor)
Semester theses focus on optimisation methods useful for construction electric machines. Contain elementary sorting optimization methods and brief description of their algorithms. In these theses is foreshadow how shape of asynchronous stator core should be optimized for better effectivity. Next chaps are discuss about application optimization methods to concrete induction motor.
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The Study of Inventory Management in Connection with Manufacturing Process
Tieber, Michael ; Klíma, Jan (referee) ; Jurová, Marie (advisor)
This master’s thesis deals with problems of inventory management in the International Repair Centre for Symbol Technologies Czech Republic s.r.o.. Actual inventory management is described with a focus on materials planning, storage and evidence of inventory movements using information database systems. A part of the thesis is also an analysis of inventory categories from several different aspects. The purpose of the master’s thesis is to submit suitable suggestions of how to improve existing inventory management processes.
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Analysis of the Lifestyle of University Students
Klíma, Josef ; Muchová, Marta (referee) ; Lepková, Hana (advisor)
The bachelor’s thesis focuses on the analysis of the lifestyle of university students. Considers their habits of the lifestyle, exercising physical activities and the habits of alimentation. Includes some suggestions for improvement. Specifies the theoretical findings of the healthy life-style and compares them with the results of the research among the university students.
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Wireless communication modules for microcontrollers
Klíma, Jan ; Matěj, Zdeněk (referee) ; Fedra, Zbyněk (advisor)
The aim of this master’s thesis is analysis of wireless communication between mikroprocesors. The first part of the work are analysed the problems the wireless free ISM band. Mainly RFM12B and ZigBee module, which i these band work and ZigBee standart. The second part are described relazation board for both module. Further how programming ZigBee module. And at last programs for tested module.
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