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Traction Li-ion accumulator 28V/40Ah with internal protecting and control circuits
Kovář, Robert ; Pazdera, Ivo (referee) ; Vorel, Pavel (advisor)
This work is a design and construction solution for an inteligent charger of Li-Ion battery system.The system consists of an accumulator, built out of individual cells (serial-parallel sequence), protective and monitoring circuits and charger with control circuits. These control circuits of this charger collaborate with monitoring circuits. The base of this charger is a switching source (singlemode buck converter with transformer).The charger allows to supply relatively high power while sustaining small dimensions.(20A with 28V that´s 560W) Use of DC/DC converter is a base of charger and also delivers other benefits, such as high efficiency and easy control of output current.
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Converter for DC Welding
Siuda, Petr ; Vorel, Pavel (referee) ; Patočka, Miroslav (advisor)
This master´s thesis with the peripheral and structural design of power converter that will be used for DC welding. The drive itself is based on the principle of two single-acting permeable converters operating in counter strokes to a mutual load. The inverter operates at a frequency of 60kHz, and its output current can be controlled from 0 - 100A. Welder is equipped with a variable constant current or power adjustment. The device is powered from a single-phase 230V.
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High-Voltage Sources for AC Cell Electroporation
Folprecht, Martin ; Drábek,, Pavel (referee) ; Damec,, Vladislav (referee) ; Červinka, Dalibor (advisor)
This doctoral thesis deals with an application of power converters in experimental medicine. Contemporary knowledge about a relatively new electroporation method and present solutions of power converters used for this method are analyzed at this work. The main part of the thesis is focused on a design and development of a new high-voltage generator proposed to AC electroporation. The last part documents an experimental verification of its function.
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Switch Mode Power Supplies
Folprecht, Martin
This article refers about my master thesis. The topic of my master thesis is the design and the construction of the switch mode power supply, which will be used as a laboratory tool. The design is shortly described and summarized in this article.
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Switching benchtop power supply 0-30 V, 0-5 A
Galia, Jan ; Pazdera, Ivo (referee) ; Martiš, Jan (advisor)
This thesis deals with the design and construction of switching mode power supply for lab application. Convertor is based on the forward topology with adjustable output voltage regulation from 0 to 30V and with maximal output current 5A. Antoher features of this power supply is adjustable current limiting function which can be set from 0 to 5A. For closed loop control was chose analogue cascade regulation.The contol part consists of operation amplifire TL072 and SG3525 contorl circuit.
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Switching charger for car batteries 14.4V/6A
Gábel, Marián ; Huták, Petr (referee) ; Martiš, Jan (advisor)
This bachelor's thesis deals with issue of design of a switching charger for car batteries using a fly-back converter. The fly-back converter and its functions are theoretically described in the first chapter, which also explains use of a modification of a circuit. The modification is used because of its increased efficiency compared to the ordinary loss solutions of a relieving circuit. Subsequently, in next chapter the thesis focuses on design of a power section of the circuit, which involves calculations of the circuit’s elements. Subsequently, the MOSFET transistor control design is performed using the UC3844 integrated circuit. The charger was constructed according to design and its proper functionality was verified by measurements.
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