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Walking as alternative source of electrical energy
Smilek, Jan ; Hejč, Tomáš (referee) ; Hadaš, Zdeněk (advisor)
This thesis deals with problematics of using the Energy Harvesting principles for generating power from the human walking. Own acceleration measurement during walking was made on various locations of human body to provide data for self-developed MATLAB/Simulink energy balance script. The script clearly sets the possibilities and limits of vibration generator used in this application. Conclusions of the energy balance were used to specify requirements for development of vibration generator and few possible conceptions, working on frequencies close to 2 Hz and acceleration amplitudes 0,3 g, were presented, or simulated.
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Optimization of the permanent magnet machine based on the artificial inteligence
Kurfűrst, Jiří ; Duroň,, Jiří (referee) ; Singule, Vladislav (referee) ; Ondrůšek, Čestmír (advisor)
The dissertation thesis deal with the design and the optimization of the permanent magnet synchronous machine (SMPM) based on the artificial intelligence. The main target is to apply potential optimization methods on the design procedure of the machine and evaluate the effectiveness of optimization and the optimization usefulness. In general, the optimization of the material properties (NdFeB or SmCo), the efficiency maximization with given nominal input parameters, the cogging torque elimination are proposed. Moreover, the magnet shape optimization, shape of the air gap and the shape of slots were also performed. The well known Genetic algorithm and Self-Organizing migrating algorithm produced in Czech were presented and applied on the particular optimization issues. The basic principles (iterations) and definitions (penalty function and cost function) of proposed algorithms are demonstrated on the examples. The results of the vibration generator optimization (VG) with given power 7mW (0.1g acceleration) and the results of the SMPM 1,1kW (6 krpm) optimization are practically evaluated in the collaboration with industry. Proposed methods are useful for the optimization of PM machines and they are further theoretically applied on the low speed machine (10 krpm) optimization and high speed machine (120 krpm) optimization.
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Energy Harvesting for Automotive Applications
Novotný, Jan ; Kovář, Jiří (referee) ; Hadaš, Zdeněk (advisor)
This thesis goal is to get information about Energy Harvesting and subsequent confrontation of it. The Energy Harvesting technology deals with process of absorption so-called free energy and conversion it into electric energy. The reason for doing that is mostly feeding wireless sensors. When the search in this area is accomplished on bases of existing constructional principles the concrete device (generator) is designed. This system might be unlimited power source for selected automotive application.
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Design of an experimental system with excitation by imbalance
Demura, Dominik ; Kšica, Filip (referee) ; Rubeš, Ondřej (advisor)
The topic of this diploma thesis is the design and construction of an experimental system driven by imbalance. The main part of the work was to design the structure to meet certain requirements. The most important part of the structure is the beam. The mounting method and beam dimensions were calculated numerically and verified analytically using FEM. The rest of the structure was adapted to the dimensions of the beam. The next part of the work consists of the correct choice of vibration motor and its control. At the end of the work, the whole experimental system was manufactured and tested. We measure the vibrations using an accelerometer and then process the data into graphs.
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Complex simulation model of vibration power generator
Harapát, Jan ; Ondrůšek, Čestmír (referee) ; Hadaš, Zdeněk (advisor)
This work is focusing on analysis of current development in energy harvesting projects in aerospace industry field, and on analysis of current development in vibration generator field. It is also concentrating on establishment of a complex simulation model of vibration generator. It deals with modeling of magnetic field of generator and its cross connection with a mechanic and an electronic model.
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Analysis of Vibration Energy Harvester with Free Moving Mass
Moravčík, Patrik ; Rubeš, Ondřej (referee) ; Hadaš, Zdeněk (advisor)
This thesis is focused on analysis of piezoelectric harvester, with unattached mass, finding out best combinations of masses, which would be the best for desing this type of generator. Adding different masses on this beam, we can see different responses to the sinusoidal harmonical signal excitation as well as the pulsating signal. The resulting most suitable combinations will also be subjected to simulations with the piezoelectric layer, the results of the output voltage and power evaluated.
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Modelling and Verification of Piezoelectric Generator
Lán, Radek ; Singule, Vladislav (referee) ; Hadaš, Zdeněk (advisor)
This master's thesis deals with the development and verification of the model of the piezoelectric generator, incl. determination of its parameters. This mathematical model should be used as a tool for development of new devices, especially for analysis of applicability of available energy source (vibration) and for design of device itself. At first the review of energy harvesting is described deeply. Subsequently piezoelectric generators and the ways how we can model them, are depicted in details. The methodology of parameters estimation and model development is presented in state space or in MATLAB/Simulink environment and applied on the commercial generator Midé V21BL. A device has been made within the scope of the thesis, which can be used as an universal tool in experiments with generator. Finally the model is applied on the analysis of energy yield from man's walk and there is also brief introduction to model modifications.
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