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Unit for wireless transmission of electrical energy
Jelínek, Aleš ; Kopečný, Lukáš (referee) ; Žalud, Luděk (advisor)
The aim of this work is to prove the practical applicability of the concept of contactless energy transfer using induction coils. The first part deals with the mathematical model and theoretical proof of the concept being able to work in practice and describes the process of detecting resonance of receiver circuit on transmitter side. Next chapter describes hardware solution of the experimental prototype. The last part contains measurement results of a coupling coefficient of coils and discusses performance and notable features of the prototype.
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Position Inductive sensor
Kořistka, Petr ; Procházka, Petr (referee) ; Huták, Petr (advisor)
Bachelor thesis deals with desing and construction of the inductive sensor. It shortly describes the history, advantages and disadvantages. Next there is developed principle of basic sensors working on the basis changes of inductivity and qualities of scanned materials. Major part of work was desing of individual parts of sensor essential to its correct function. It includes oscillator, rectifier, PI regulator, supply of tension and evaluation circuits. In the practical part was suggested PCB for individual parts of sensor. Measurement and processing of results were done.
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Device for stringing cable on a drum
Polách, Martin ; Pokorný, Jan (referee) ; Kašpárek, Jaroslav (advisor)
The thesis deals with the design of a cable spooling device on a spool drum under different modes of operation of winding. The focus is on the calculation and design part, where the calculations include the functional dimensions of the individual components and the force effects emanating from the load generated during winding. The design part includes the design of the individual components. Finally, an analysis of the selected structural nodes under different winding modes was performed. This work includes drawings containing the overall equipment assembly, subassembly of the weldment frame and shop drawings.
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Design of a prototype table winder for linear coils
Ryza, Vojtěch ; Hrabčík, Miroslav (referee) ; Řehák, Kamil (advisor)
The diploma thesis deals with the design of a prototype table winder for linear coils. The first part of this work describes the basic properties of the coil and its winding methods. In the following section, a critical search was made of the reels available on the market based on which the reel concept itself was created. The work describes in detail the procedure of the winder design together with the design variants of the individual parts of the winders. At the end of the diploma thesis is presented the needed prototype of the coil winder. This problem was solved by using the 3D program SolidWorks and FEM in the program ANSYS Student. The project describes the individual steps of the design of the concept of a prototype linear winder and the component's design.
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Measurement and recording of the initial magnetization curve and hysteresis curve of ferromagnetic materials
Tran, Quoc Bao ; Vaněk, Jiří (referee) ; Klvač, Ondřej (advisor)
This thesis deals with the measurement of primary magnetization curves and hysteresis loop. The thesis is divided into two parts, the theoretical part and the practical part. The theoretical part describes the creation of magnetic field in materials, excitation of magnetic field by electric current or excitation of electric current by changing magnetic field. The practical part is focused on designing, construction and testing of amplifier and the measurement and displaying of hysteresis loop. In the end of the thesis is summarized what results were achieved.
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Control of Low Voltage Contactor by calculation and measurement
Veselý, Matěj ; Šimek, David (referee) ; Bušov, Bohuslav (advisor)
The bachelor project deals with controlling mean parametres of low voltage contactor by calculation and measurement. Deals more specifically with calculation of the applied electrodynamic forces on the contactor's movable contact, the determination of the minimum compressive force on the contactor's movable contact and the design of the contactor trip system. It also deals with calculation of heating of the current-carrying path on contactor and its following check by measuring.
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Electronic RLC meter
Dvořák, Radim ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
This work deals with measurement methods of passive components R, L ,C used almost in every electrical circuit. Work describes progress of choosing the right methods for measurement and also the process of designing the autonomous RLC meter with use of ATMEL microprocessor chips. The RLC meter will be powered from rechargable battery and will be able to measure primary attributes of RLC components.
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Construction of the stand for the filaments on spools
Bezděk, Petr ; Dočkal, Kryštof (referee) ; Škaroupka, David (advisor)
The aim of this bachelor thesis is to develop a stand for filament spools with minimal unwinding resistance, which eliminates stitching of filament and calculates the amount of unwound material. The stand is designed for a spool filament in the weight range of 250 g to 2.5 kg. Furthermore, the goal is to make the stand universal and usable for various 3D printers. The problem is solved by selecting the most appropriate concept for the problem based on the applicable concept analysis. The work contains an overview of the essential facts concerning stands, unwinding and 3D printing. Subsequently, the key issues are analysed on the basis of balancing the benefits of the possible variants of the concept. The chosen concept is solved in structural parts, which ultimately form a functional unit and a completed product. The result is a complete stand design in the form of written work, production documentation and manufactured product. The stand function has been verified by testing. The work is beneficial in terms of expanding awareness of rack issues, identifying 3D printing problems associated with the spool stand, designing and finished products for use in printing. The design is entirely designed to produce only one piece.
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Development of laboratory samples for wireless transmission of electric power based on the magnetic induction
Kopečný, David ; Štěpánek, Jaroslav (referee) ; Krbal, Michal (advisor)
The aim of the thesis is to collect the information about wireless transmission by using magnetic induction and about the current solutions of wireless applications in practice. The thesis includes theoretical basis and information about the current state of wireless power applications. This thesis is also focused on physical principle and draft of possible technical solution. On top of that, it also contains the information from some legislative and hygienic regulations. The second aim is draft of laboratory equipment on the base of gained information and its implementation for purpose of teaching and measuring. For this part was chosen topology of circuit and the specifications of resonance circuits. It resulted in producing a preparation, which consists of the exciter, primary circuit, secondary circuit and a module for measuring. The third aim is to take a measurement on this product and evaluation of characteristic from point of view of efficiency. Measured data were integrated into characteristics. The efficiency of transfer was measured depending on distance and used load. At the same time was also observed work frequency of product. Furthemore, another laboratory product was measured, in which was reached the efficiency more than 51%. The thesis is divided into four main chapters, which can be thematically named as follows: the information, the theory, the draft and the measurement. The first two chapters deal with the theory and characterization of technologies of already applied systems mainly from transport. The following two chapters contain the description of proposal of the product and the very measuring of the efficiency.
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Small Coil Winding Machine
Ihnát, Kryštof ; Friedl, Martin (referee) ; Szabó, Zoltán (advisor)
This work is about designing a small coil winding machine for the school workshop. The first part consists of market research, a comparison of winders, and an explanation as to how they work. It is followed by short chapter about the inspiration for the design and construction. It also includes the parts that were used as well as peripheries. These include the most important component; stepper motors. In the next part, the prototype and subsequent revisions are described, as well as the most important parts of the code and construction of the coil winder itself and it's parts. In the end, there is chapter about it's operation.
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