National Repository of Grey Literature 99 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
The electromobile charging standards overview
Novák, Michal ; Toman, Marek (referee) ; Červinka, Dalibor (advisor)
In this bachelor´s thesis is performed literary research on the topic of charging standards in the area of electric vehicle charging. The work presents the historical standards appearing at the beginning of the development of electric vehicles and their subsequent development. The main part of bachelor´s thesis is the division of charging standards into categories according to the IEC 62196 standard, the division according to the method of charging and the specialized standardized connectors and sockets used. The principle of communication and required hardware during AC charging and DC charging is also described.
Electronic ballast for power LEDs
Vágner, Richard ; Martiš, Jan (referee) ; Červinka, Dalibor (advisor)
This diploma thesis deals with design of power LED driver. This driver contains electronic ballast circuits, converters, filters and control circuits. Overviews of circuits used in practice are listed along with analysis of power LED and considering options for selecting an appropriate design solution. Thesis describe principle of electroluminescense, creating of the device, its structure and problematics of current source supply. Including detailed overview of converters, ballasts and topologies used in lighting systems with the selection of a suitable solution for the final device with an output power of 50 W. The thesis contains cooling dimensioning for selected power LEDs, input circuit with EMI filter, bridge rectifier, boost converter and flyback converter with pulse transformer.
AC Cell Electroporation Based on Asymmetrical Waveform
Folprecht, Martin ; Cervinka, Dalibor ; Novotna, Veronika
This paper discusses an application of different waveforms during a cell electroporation process. Latest scientific papers emphasize advantages of asymmetrical waveform applied to tissue. Higher effect of the electroporation process is reached and muscle contractions are less significant. Most high­voltage generators are based on a controlled discharge of storage capacitors. We present a different solution of the generator, where a power part contains a pulse transformer.
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.
Programmable logic controllers and their use in teaching process
Sonbol, Danny ; Knobloch, Jan (referee) ; Červinka, Dalibor (advisor)
This thesis deals with a programmable logic controller (PLC) that is used in automation, machine control or production lines in factories. The studied PLC type is Modicon M241. Its principle, construction, and programming languages are further described. In addition, a control program was developed in Machine Expert programming software and laboratory manual.
Cyclic acceleration method for electrical machines measurement
Ředina, Ondřej ; Ctibor, Jiří (referee) ; Červinka, Dalibor (advisor)
The bachelor thesis deals with the cyclic acceleration method of measuring and loading electrical machines. The thesis contains a description of the measuring method and processing of measured data. The application of the method was realized in the company AVL Moravia s. r. o. The processing of the measured data in the form of a sine wave was performed in the MATLAB program. At the end of the thesis are summarized the inaccuracies of measurements and following optimization of this method.
Electromagnetic levitation
Kondys, David ; Červinka, Dalibor (referee) ; Martiš, Jan (advisor)
The thesis deals with the issue of magnetic levitation. It is divided into two main chapters. The first chapter is focused on a general introduction to magnetic levitation. It describes the types of magnetic levitation, their use and the principle of execution. The end of the chapter is focused on a more detailed description of magnetically levitated MAGLEV trains. It describes the history of these trains, their use and construction. The second chapter is focused on the design of a device for demonstrating magnetic levitation. First, it deals with the simulation of an electromagnetic problem in the FEMM program. In addition, for the selected position configuration of the electromagnet and levitating magnet, it describes the design of the construction of the device in SOLIDWORKS and its manufacture. The result of the work is an attempt to make such a device that can stably keep the levitating magnet in the air.
Electronic ballast for power LEDs
Vágner, Richard ; Martiš, Jan (referee) ; Červinka, Dalibor (advisor)
This diploma thesis deals with design of power LED driver. This driver contains electronic ballast circuits, converters, filters and control circuits. Overviews of circuits used in practice are listed along with analysis of power LED and considering options for selecting an appropriate design solution. Principles of creating the device, structure and problems of current source are described in thesis. Including detailed overview of converters, ballasts and topologies used in lighting systems with the selection of a suitable solution for the final device with an output power of 50 W. The thesis includes cooling dimensioning for selected power LEDs, input circuit with EMI filter, bridge rectifier, boost converter and flyback converter with pulse transformer.
Microprocessor controlled inverter for motors
Fiala, Michal ; Červinka, Dalibor (referee) ; Knobloch, Jan (advisor)
This diploma thesis deals with design of universal converter used for motor control by microcontroller. The first part contains concept, functional overview of the device and its parts. The next part deals with mechanical design and construction of the converter and dimensioning of power, control and measurement circuits. The following part describes control algoritm used for three-phase motor and its testing using simulation. The final chapter of the thesis describes PCB mounting and testing of the device and control algoritm on real motor.
Bánki-Michell turbine set and its maximum power point control
Marčok, Samuel ; Baculák,, Tibor (referee) ; Červinka, Dalibor (advisor)
This master’s thesis focuses on maximalization of power point of Bánki-Michell turbine and asynchronous generator set in small hydroelectric powerplant with the use of frequency converter. The first chapter addresses the history, division, and construction of hydroelectric powerplants. The following two chapters describe mechanical and electrotechnical equipment that is necessary for correct design of the control. The fourth chapter describes control possibilities of asynchronous generator and Bánki-Michell turbine set. As a verification of correctness, master´s thesis involves simulation in Matlab-Simulink. Results of this simulation are addressed in the fifth chapter, where systemic behaviour in selected control approach with the maximum power point of the set is considered. The most extensive chapter is the sixth one, because it depicts detailed description of measurement in speed or torque control. Last chapter summarizes and compares measured dependences with expected systemic behaviour derived from simulation. The conclusion of this thesis raises another possibilities for improvement of water potencial usage and describes the contribution of frequency converter.

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