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Power supply module for servo-drive
Kudláček, Pavel ; Procházka, Petr (referee) ; Červinka, Dalibor (advisor)
The aim of the diploma thesis is to theoretically design and to put the mains power supply module for two-axis servo amplifier TZG 560 with the total power 28kW for the company TG Drives into practice. The analytical design of the power part with the braking circuit, the calculation of power components’ heat balance, EMI filter design and realization of measuring, controlling and indication circuits are described in the thesis. In addition, the mechanical device construction, structure of the controlling program and the results obtained in the verification process of the module functionality are presented.
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Device for magnetic stirring of suspension with ferromagnetic particles
Zítka, Jan ; Knobloch, Jan (referee) ; Červinka, Dalibor (advisor)
The aim of this work deals with the design and manufacture of a device for mixing of magnetic beads in solution by magnetic field. It is based on my previous bachelor thesis, where the device was created for one microtube (one sample). In this following work, the three improved variants for mixing and separation of 96 samples at one time were designed. The first variant of device, derived from functional prototype from bachelor thesis, was manufactured. First, the magnetic circuit and power converter were designed. Subsequently, the device was manufactured just for one microtube due to functionality testing. The third variant was realized only experimentally, the construction was designed in CAD program, and individual parts were created using 3D printer. As an alternative solution, which should be the compromise among electromagnetic and mechanical stirring, additional prototype was manufactured using 3D printer and CNC instrument. This prototype utilizes neodymium magnets and a stepper motor. The capability of magnetic beads mixing in solution was verified.
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DC-DC converter for onboard charging of electric vehicles
Holub, Miroslav ; Červinka, Dalibor (referee) ; Folprecht, Martin (advisor)
This master thesis deals with design of DC-DC converter for onboard charging of electric vehicle. Developed converter will mainly be used for charging stationary traction battery in laboratory. Output voltage of this charger will be adjustable by user in between 200 V and 450 V depending on the current charged battery configuration. Output current limit is set at 8 A. Since the converter will be supplied from standard household socket, the problem of power factor correction must be solved during the design. That is because a large part of this thesis is focused on describing the problematics of power factor correction. After that, active PFC module is designed, completed and performance of this module is verified. To achieve low overall losses and thus be able to keep small volume of the system, modern switching components based on Silicon Carbide were preferred. Beside laboratory use, completed system will be used to emphasize volumetric difference between onboard chargers based on old versus modern switching components.
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Universal controller for car or motorcycle dynamo
Picmaus, Jan ; Knobloch, Jan (referee) ; Červinka, Dalibor (advisor)
The thesis deals with the issue of design of an electronic controller of charging for historical cars using a dynamo. It contains theoretical analysis of the machine itself (dynamo) and analysis of a shunt wound dynamo and a seperately excited dynamo. It~is also focused on possible usage of a dynamo in various vehicles. The work compares industrially produced controllers with amateur manufacture as well as confronts their positives and negatives. All requests for the implemented controller are deduced from the analysis of the industrial and amateur controllers. The thesis consists of process plan of controller connection including the final working version and also the project and realization of a PCB as well as following description of putting the controller into practice and installation in the car. The thesis includes the project of current and voltage controllers, following adjustment and operation tests with use of the real device.
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PLC systems in education process
Král, Radek ; Ctibor, Jiří (referee) ; Červinka, Dalibor (advisor)
The bachelor thesis deals with programmable logic controllers for teaching. The thesis is divided into six chapters. The first chapter describes the basic programming languages as well as their resolution with graphical preview. The second chapter deals with programming environment GX Works2 from Mitsubishi Electric. Chapters three and four describe the SoMachine programming environment from Schneider Electric and Automation Studio from B&R. The fifth chapter of this bachelor thesis compares individual programming environments from the perspective of a common user. Nine laboratory tasks are proposed in the final part. For each lab task, a lab tutorial is created, and for most, an example of a logical program and visualizations.
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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.
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