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Wireless Energy Transfer
Lašo, Matej ; Paar, Martin (referee) ; Krbal, Michal (advisor)
The aim of this Bachelor's thesis is to give complex information about wireless energy transfer and its historical evolution. The thesis then continues with describing the devices that are using wireless energy transfer and the effects this method is having on human health and the ways protecting against its effects. The second part, concerning practical measurements, aims at measuring on special pads using the wireless transfer on which I have made all my calibrations and measuring of magnetic flux and efficiency of this transfer.
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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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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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Mechatronic system for presentation of damped oscillation
Sirota, Tomáš ; Březina, Lukáš (referee) ; Hadaš, Zdeněk (advisor)
This work is aimed to creating a system for presentation of oscilations. The main part consist of electromagnetic damper, which properties are suitable for use in this system. In the first part are some conditions for design of damper body . In he second part are selected next parameters for electromagnetic damper and of the whole system by MATLAB / Simulink with iterative method. In last part is whole system analyzed and the results indicate next changes in the structure of the system.
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Design of shaped springs for mechanical resonators
Ševčík, Jakub ; Kšica, Filip (referee) ; Hadaš, Zdeněk (advisor)
This bachelor's thesis deals with the design of a structural flexible member for mechanical resonators. Such designed member could find application as part of a vibration generator system. Vibration generators are used to power sensors where it is not easy to supply electrical energy, especially in railway transportation, specifically in monitoring the condition of tracks. This thesis provides an overview of current constructions of vibration generators, drawing inspiration for the subsequent design of the flexible component of the mechanical resonator. Subsequently, a suitable construction is created to ensure proper functioning of the resonator at frequencies ranging from 15 to 50 Hz. The design takes into account the manufacturing process using laser cutting and 3D printing. Two versions are created, where the first is suitable for laser cutting, and the second is suitable for 3D printing. The designed flexible components are then kinematically excited, and their maximum deflection at the resonant frequency is determined using the Ansys and Simulink software. Lastly, a spring suitable for 3D printing is manufactured. Its maximum deflection and the maximum generated power are determined. At an acceleration of 1 m/s2, the system achieves a deflection of 0.5 mm, and the generated power in this case is 0.035 mW. With increasing acceleration, the pover values can reach up to 0.8 mW.
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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.
|
|
|
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.
|
|
|
Wireless Energy Transfer
Lašo, Matej ; Paar, Martin (referee) ; Krbal, Michal (advisor)
The aim of this Bachelor's thesis is to give complex information about wireless energy transfer and its historical evolution. The thesis then continues with describing the devices that are using wireless energy transfer and the effects this method is having on human health and the ways protecting against its effects. The second part, concerning practical measurements, aims at measuring on special pads using the wireless transfer on which I have made all my calibrations and measuring of magnetic flux and efficiency of this transfer.
|
|
|
Mechatronic system for presentation of damped oscillation
Sirota, Tomáš ; Březina, Lukáš (referee) ; Hadaš, Zdeněk (advisor)
This work is aimed to creating a system for presentation of oscilations. The main part consist of electromagnetic damper, which properties are suitable for use in this system. In the first part are some conditions for design of damper body . In he second part are selected next parameters for electromagnetic damper and of the whole system by MATLAB / Simulink with iterative method. In last part is whole system analyzed and the results indicate next changes in the structure of the system.
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