National Repository of Grey Literature 68 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
DC/DC converter for car-audio amplifier
Šmarda, Vladislav ; Vorel, Pavel (referee) ; Červinka, Dalibor (advisor)
This Bachelor thesis deals with the design and construction of a resonant switching power supply for car audio-amplifier. The main subject of the theoretical part is the mathematical description of the applied ZVCS Push-Push topology. Also a general guide, for designing this type of topology is mentioned. There is described the optimalization procedure of the main switch mode power transformer with respect to the high efficiency of the proposed power supply. Then the designed power supply is made and tested.
Model of Electric Direct Current Locomotive
Januška, Adam ; Červinka, Dalibor (referee) ; Pazdera, Ivo (advisor)
In this bachelors thesis you can find two ways of controlling direct-current traction motors in locomotives. The main power circuits of two locomotives, which have different motor speed control, are described in this work. The first type of control is the resistors switching control, which is simulated on the E 499.2 locomotiv series (150 series). This controling is compared to thyristor circuit control used in E 499.3 (163) locomotiv series. The simulation is made in the Simulink environment, which is the extension of the Matlab program.
Power inverter with active rectifier
Dvořáček, Daniel ; Červinka, Dalibor (referee) ; Rubeš, Ondřej (advisor)
This thesis deals with the principle of functions, constructions and possibilities of the control of inductions machines. There is also briefly described the issue of the power transducers from which the frequency converters are coming out, as well as is described here the process of designing of the power part of the converter.
Experimental electromagnetic acceleration device with more stages
Kovařík, Martin ; Červinka, Dalibor (referee) ; Martiš, Jan (advisor)
This master thesis deals with design and realization of multistage electromagnetic accelerating device (gun) and possibilities to increase its effectivity. This work contains a simulation of a magnetic circuit and designs of each components, inclusive of control circuits. Reached effectivity will be measured by appropriate methods.
Battery monitoring and protection system
Hladík, Jan ; Červinka, Dalibor (referee) ; Knobloch, Jan (advisor)
This work deals with design of battery management system. Requirements for battery management system and its conception is discussed in the first part of the work. System is able to disconnect load or charger from battery using MOS-FET transistors. It measures battery cell's voltages and is capable of passive balancing. Microcontroller is used for data processing and system control. Schematics, printed circuit board layout and control algorithm was designed. Prototype of the battery management system was then manufactured and tested.
Utilization of the Laboratory stand with inverters and motors in the teaching process.
Holub, Miroslav ; Ondrejček, Vladimír (referee) ; Červinka, Dalibor (advisor)
This bachelor thesis is about laboratory stand for electrical drives lessons. This facility is developed by UVEE department and functional protype is allready finished. Main subject of this thesis was revising of gate driver circuit board and physical realization of further workplaces. At overall 8 identical workplaces are constructed. Last part of thesis was testing of actual prototype performance especially its load capability.
Electrical installation in family house
Dalecký, Jan ; Červinka, Dalibor (referee) ; Ondrejček, Vladimír (advisor)
In this bachelor's thesis is analyzed electrical installation of family house. It's goal is to summarize information important for designing electrical installation and subsequently create project documentation of electrical installation of three-floor family house. First part of the bachelor's thesis is dedicated to directives and demands for realization of electrical installation, which you need to lead by when creating project documentation and then assembling it in an object. The second part is focused on creating blueprints including lightning protection, low and high current installation, designing and dimensioning switchboards and technical report.
Power Converter for DC Welding
Vranák, Daniel ; Červinka, Dalibor (referee) ; Patočka, Miroslav (advisor)
The masters thesis was focused on design and realization power converter which should worked as welding machine. It was necessary choose suitable type converter. Next, it was needs design of pulsed transformer, output filter choke and design of semiconductors which were in power part welding machine. It was also designed control and driver circuits. This parts which were used on construct the converter were made and tested too.
Device for magnetic mixing of solution containing magnetizable particles
Zítka, Jan ; Martiš, Jan (referee) ; Červinka, Dalibor (advisor)
The aim of this works was the design and construction of a device that will be used for magnetizable beads mixing without application of mechanical force. In theoretical part of this work, properties of ferromagnetic nano- and microbeads and methods used for mixing of these beads were described. Two coils were reeled in for the device, each consisting of 200 turns and with 0.8 . The device construction was designed in program CAD. Different parts of the instrument were 3D printed. The control program, which enables changes in coil switching, was created and then the testing of device functionality was performed.
MIG/MAG welder with switching power supply
Klejma, Michael ; Červinka, Dalibor (referee) ; Martiš, Jan (advisor)
This diploma thesis deals with design of welding power supply for MIG / MAG and MMA technique with continuous output current 120 A. The first, theoretical part is devoted to welding process technology, physical characteristics of electric arc and description of individual welding methods. The thesis also deals with the concept of power converter. The design of the switched-mode power supply is based on a full bridge topology. In order to implement advanced controls of welding power supply, the ARM Cortex M4 microprocessor was selected. Due to the large power consumption of the stepper motor for drive the welding wire, an auxiliary switched-mode power supply was also implemented. The documentation describing the realization of the welding power supply and the results of the measurements are in the last part of the thesis. The welding power supply was successfully revived and reached nominal parameters. Inert gas welding has not been tested yet, due to lack of time caused by extensive work in order to complete mechanical realization.

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