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Reducing transformer inrush
Zoufalý, Marek ; Bušov, Bohuslav (referee) ; Šimek, David (advisor)
In this thesis is described the function and design of the transformer designed on ferromagnetic core, composed of transformer sheets. It is explained a transient inrush current of the transformer. In this work is inserted voltage and current waveforms, designed printed circuit board, serving to reduce the inrush current.
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Mechanical Properties of solder joint
Meliš, Josef ; Starý, Jiří (referee) ; Stejskal, Petr (advisor)
This thesis deals with the differences between the mechanical properties of surface conditionings of the printed circuit boards and various types of soldering pastes. The practical part of the thesis describes all the steps necessary to conduct the experiment. The experiment will evaluate the measured mechanical strength of the solder joint for each surface conditioning, the types of solders, the increase in thickness of the intermetalic layer during long-term aging and the change in the structure of the solder joint.
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High Voltage Switchgear Thermal Distribution Analysis
Bílek, Tomáš ; Rudolf, Pavel (referee) ; Hrabovský, Jozef (advisor)
Cílem této práce je analýza teplotního pole vysokonapěťového rozvaděče. Tato analýza je založena na kombinaci experimentálního měření a CFD simulace proudění vzduchu v prostoru rozvaděče. Na základě výsledků pro referenční geometrii jsou předloženy návrhy na úpravu topologie rozvaděče, které mají za cíl snížení teploty kritických komponent rozvaděče během jeho provozu. Druhá část práce je spojena s problematikou oteplení plošných spojů, jakožto hlavních zdrojů tepla v prostoru rozvaděče. Pro popis závislosti oteplení plošného spoje na jeho charakteru byla použita statistická metoda design experimentu. Výsledky z experimentálního měření jsou podpořeny konečně prvkovým modelem kontaktu spoje.
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3-D Coils and Transformers
Florián, Petr ; Háze, Jiří (referee) ; Šandera, Josef (advisor)
Construed work deal with present situation in resolving 3D coils and planar transformers with windings realized on printed circuit. Main objective is to find a correct technological process of manufacturing printed circuits and methods of their 3D joining. The output of work is calculation and proposal winding of planar transformer and selection right method for realization. Point of the work is trying to create a suggested transformer.
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Reducing transformer inrush
Zoufalý, Marek ; Bušov, Bohuslav (referee) ; Dohnal, Petr (advisor)
In this thesis is described the function and design of the transformer designed on ferromagnetic core, composed of transformer sheets. It is explained a transient inrush current of the transformer. In this work is inserted voltage and current waveforms, designed printed circuit board, serving to reduce the inrush current.
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3-D Coils and Transformers
Florián, Petr ; Háze, Jiří (referee) ; Šandera, Josef (advisor)
Construed work deal with present situation in resolving 3D coils and planar transformers with windings realized on printed circuit. Main objective is to find a correct technological process of manufacturing printed circuits and methods of their 3D joining. The output of work is calculation and proposal winding of planar transformer and selection right method for realization. Point of the work is trying to create a suggested transformer.
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Digital secondary clock
Hortvík, Martin ; Mašek, Petr (referee) ; Marada, Tomáš (advisor)
The aim of this thesis is to design and implement control electronics for digital secondary clocks. The first part is focused on familiarization with the issue of the use of secondary clocks. Subsequently, the work deals with the design of electronics for generating minute pulses. The first part of the proposal is to ensure the correct voltage size and polarity of pulse. The exact timing pulses are provided by a pair of control circuits, Atmega8 microcontroller and RTC. The last part describes the procedure of realization of electronics by making schema, design and manufacture PCB, circuit revive and the implementation of the module into case.
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Design of printed circuit boring machine
Vondrák, Pavel ; Synek, Miloš (referee) ; Blecha, Radim (advisor)
The aim of this bachelor thesis is to show possible constructional solution of CNC boring machine. The design describes construction of frame, linear motion system and feedworks. Then are chosen suitable motors, their operating and machine spindle. In conslusion is made costing of final price of described boring machine. The part of the thesis is also a design documentation.
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