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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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Induction heating for small applications
Hrbáč, Lukáš ; Foral, Štěpán (referee) ; Krbal, Michal (advisor)
This bachelor’s thesis covers the topic of induction heat and possible solutions for small applications. There is theoretical knowledge needed for design of an induction device and also principles of induction heat. In the thesis, there is described resonant circuit, which is the main part of induction heating device. Furthermore, usual interpretations of driver and power circuits are analyzed. This work describes different ways how to adjust operating frequency to achieve better results. This thesis also includes verification of functionality of such a device, measurement of operating parameters and efficiency. Instructions for laboratory exercise dealing with induction device are attached in the appendix.
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Design of Resonance Mechanism for Rolling Mass Energy Harvester
Kvaššay, Miroslav ; Věchet, Stanislav (referee) ; Hadaš, Zdeněk (advisor)
A significantly important part in sea monitoring is to find the right choice of electric generator to power sensors in ocean buoys. This Bachelor’s thesis introduces a design of resonance mechanism for rolling mass energy harvester running on very low excitation frequencies, which are present in a marine environment. Firstly, there is research about energy harvesters based on planar motion, from which a prototype of resonance mechanism has been designed, based on a proof of mass, rolling in an internal gear. Second, after a proper analysis of proposed mechanism, a final resonance mechanism design for a rolling mass energy harvester has been made, with a natural frequency of 0,84 Hz. This mechanism can be adjusted by changing the gear or steel tube parameters to fit different objectives. Third, a physical prototype realization of the proposed mechanism was generated and successfully tested on a robot arm. To generate an electricity the energy harvester utilizes electromagnetic induction, which was tested on two pairs of coils. The prototype produced on average 1,81 mW of power undergoing harmonic excitations with an amplitude of ±20° around the Z axis at resonance frequency in serial wired coils with 332 resistance. The conclusion of the experimental measurements suggests that a proposed energy harvester is suitable for self-powered ocean buoys and can generate more electricity when a coil is fully optimized.
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Dynamic analysis and prototyping of coilgun
Militký, Ondřej ; Musil, Filip (referee) ; Rubeš, Ondřej (advisor)
This thesis deals with the description of the Gaussian rifle principle. It describes the physical principle, on which the device works, the design of the structure and its advantages and limitations. Furthermore, a computational model is created in the Matlab Simulink environment, which simulates the behavior of a projectile during a shot. Based on this model, a prototype Gaussian rifle is designed and constructed. The prototype is then tested and compared with a computational model to determine the overall effectiveness of the created rifle.
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Wireless li-ion charger with high efficiency
Bottyán, Marian ; Leixner, Martin (referee) ; Pál, Tamás (advisor)
The aim of semester's work is the design and development of high efficiency wireless charger for li-ion batteries. According to the criteria for high efficiency and safety of the device on surroundings were components chosen in design. In conclusion, this work has estimated losses on components of the device. On their basis was determined the charging time and effeciency.
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Proposal and Design of Electromagnetic Shock Absorber
Sirota, Tomáš ; Vetiška, Jan (referee) ; Hadaš, Zdeněk (advisor)
This paper deals with the problem of electromagnetic dampers and their design. Compares several different technical solutions. It prepared the basic structure of the shock and the initial draft of the parameters based on the need for usability in real off-road model and simulation of mechatronic systems in the program MATLAB / Simulink and subsequent modification and tuning of parameters specific technical solution chosen. Furthermore, the work deals with management options electromagnetic damper settings manually, or using a controller.
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Nonlinear Energy Harvesting Devices
Rubeš, Ondřej ; Singule, Vladislav (referee) ; Maga, Dušan (referee) ; Hadaš, Zdeněk (advisor)
This thesis is focused on vibration energy harvester, which is a device converting kinetic energy of vibrations into electrical energy. The approximate dimensions of the device are ten centimeters, and the output power is in milliwatts. A device that generates such amount of power can function as a power source for communication modules and can be used for wireless sensors, which can be utilized for example in the Internet of Things. Existing devices are based on a simple linear oscillator, but they have a narrow operating frequency bandwidth, where they can operate effectively. The bandwidth extension of vibration energy harvesters using nonlinear characteristics is the main aim of this thesis. It leads to a design of a nonlinear device with wide operating frequency bandwidth that provides higher implementation in industry.
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Design of vibration energy harvester with blade joint
Beňo, Martin ; Hadaš, Zdeněk (referee) ; Rubeš, Ondřej (advisor)
This bachelor thesis deals with the design of vibration generator with blade joint. Firstly, its main aim is to design a working vibration generator, and secondly is to entice the reader to continue on with reading. Such a vibration generator is a handy, inexpensive to manufacture, and especially very simple. The basic design element of the vibration generator is oscillating frame connected to the blade joint and is the carrier of the magnets. The electrical part of the generator consists of a magnetic circuit and coil on the static bracket. Oscillating frame with magnet creates a changing magnetic field and induces voltage in the coil. For the design of the construction was used the program Inventor. For the calculation of the magnetic circuit has been selected, the program FEMM controlled by MATLAB. For the calculation of the static and the dynamic analysis was chosen the program ANSYS.
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Simulation and modeling of free body dynamic inside sea drifter
Moravec, Jakub ; Věchet, Stanislav (referee) ; Hadaš, Zdeněk (advisor)
This thesis deals with the development of a simulation model of an energy harvester based on the electromagnetic resonator principle. The introduction focuses on a search of the devices created so far for the conversion of kinetic energy of the sea into electrical energy. Furthermore, a model of the resonator design tuned to a frequency of 1.6 Hz is created in the body dynamics program MSC Adams. Simulations are performed in this program to analyze the resonator properties. Finally, the model is tested by real sea excitation. From these simulations, the electrical power obtained by this device is then predicted. Under regular sea excitation, the harvester power reached instantaneous peak values of 5 W and in case of irregular sea excitation the peak power values reached up to 16 mW.
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