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Design of low-cost control unit for DC/BLDC motors
Pospíchal, Tomáš ; Najman, Jan (referee) ; Rajchl, Matej (advisor)
This thesis deals with design and construction of motor driver, firmware for STM32H7 a software UI in Python. Motor driver has four total half bridges, from two H-bridge Smart Gate Drivers. Motor driver is designed for 100W DC/BLDC motors. Communication over USB 2.0 HS, using CANOpen protocol with IEC 61800-7 device profile. Motor driver could be used for lectures and demonstrates USB 2.0 HS capabilities of STM microcontroller.
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DC/DC converter 12V/300V
Žurek, Jan ; Hanák, Pavel (referee) ; Kubánek, David (advisor)
This Bachelor´s Thesis is about switch power supplies theory. It contains comparation with power supplies made of linear components and briefly describes principals of each type. Bigger attention is devoted to fly-back engagement, on which´s basic is then in practice designed particular switch power supply. All key components are counted, including initiation of important species interaction, especially of transformator, MOSFET semiconductor triode, output diode, and there are chosen important components, which are subsequently implemented into the particular switch power supply engagement. This blocking engagement turned out to be functionless. That was why I decided to use engagement called half-bridge, which was viable.
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Cooling of Data Center
Ostrezi, Jakub ; Katolický, Jaroslav (referee) ; Štětina, Josef (advisor)
The aim of this work is to design data center placed into an ISO container used for transportation. Maximization of the space efficiency and minimization of the running costs are primary. This work also contains a measurement of data center electronic parts power consumption, a computational fluid dynamics model, a simulation of external thermal gains and a 3D model with basic technical drawings.
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Design and fabrication of the module used for the low voltage electric motors
Ludva, Stanislav ; Chalupa, Jan (referee) ; Šulc, Dalibor (advisor)
The aim of this diploma thesis is to design and implement a universal driver unit designed to control electric motors of small voltages – electronically commutated, DC and stepper. This involves creating topology and selecting appropriate components based on the required parameters. It also includes the manufacture of printed circuit board (PCB), soldering of the components and programming of the necessary functions. Thesis contains the analysis of three selected types of motors – the principle of operation, wiring and control. Testing of the control unit was performed at the end of the work.
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Voltage convertors for microprocessor devices
Kus, Václav ; Kolouch, Jaromír (referee) ; Michálek, Václav (advisor)
The task of this semester work is carried out summary converters DC / DC power supply suitable for small microprocessor devices with LCD display. As the input source voltage is 9V battery or two batteries (3V). The market has recently appeared a lot of manufacturers of these drives but more detailed information often not available. This work I wanted to help in selecting the correct convertor for your microprocessor equipment. The aim is not to describe all DC / DC converters. Another point of this work is the proposal of two DC / DC converters powered from 9V battery, and two converters fed from two batteries 1.5V. These converters are measured throughout the operating range of output values. This work also contains the documentation for the construction and use.
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DC/DC step-up converter with synchronous rectifier
Pospíšilík, Vojtěch ; Feiler, Zdeněk (referee) ; Červinka, Dalibor (advisor)
In the bachelor’s thesis we will deal with the design, optimization and subsequent build of the increasing DC converter with synchronous rectifier. Experimentally we find parameters for which we will make the design. Then we choose a suitable control circuit and calculate the parameters of the converter output elements, which assign specific components. After that we will design the printed circuit board, complete and we will renew the converter.
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Design of low-cost control unit for DC/BLDC motors
Pospíchal, Tomáš ; Najman, Jan (referee) ; Rajchl, Matej (advisor)
This thesis deals with design and construction of motor driver, firmware for STM32H7 a software UI in Python. Motor driver has four total half bridges, from two H-bridge Smart Gate Drivers. Motor driver is designed for 100W DC/BLDC motors. Communication over USB 2.0 HS, using CANOpen protocol with IEC 61800-7 device profile. Motor driver could be used for lectures and demonstrates USB 2.0 HS capabilities of STM microcontroller.
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A Comparison of the Representation of Gay Characters in Superhero Comics Published by Marvel and DC in the 1990s
Dolejš, Jakub ; Sehnálková, Jana (advisor) ; Kýrová, Lucie (referee)
The thesis analyses the representation of gay male characters in comics published by Marvel and DC in the 1990s. Through a comparative analysis based on the data collected, the publishers' approaches to three aspects of the representation of homosexuality - that is, coming out, the subsequent representation of sexuality, and the topic of HIV/AIDS - will be compared. Five characters were selected for comparison from the two publishers based on certain criteria such as the number of appearances in the comics or the year of coming out about sexuality. For these selected characters, the author of this thesis follows the mentioned themes and then compares their subsequent representation.
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Assessment centre - validity, possibility and risks in the usage the company's procedure method
Doubková, Dagmar ; Bahbouh, Radvan (referee) ; Kirovová, Iva (referee)
My rigorous thesis is focused on the issue of Assessment Centre method (AC), its validity, contribution and objectivity, ethical rules and difficulties. The selection of competences studied by this method is discussed here as well. Strong and weak sides of the method are described by the SWOT analysis and possible opportunities and threats are pointed out in the work. The structure and the implementation of the AC method as well as its opportunities and real use in practice are described in the theoretical part of the work. This part of the work is also focused on the particular methods used within the AC methods. The differences between the Assessment Centres and Development Centres are brought up here. The AC method is compared with the other procedures which are used for the selection and development of employees. Opportunities and limitations of the validity of the measurement are discussed in this part of the work. The practical part of the work is devoted to the comparison of the AC method with other methods of selection and evaluation concerning the contribution and objectivity. The data analyzed in this comparison have been collected from the interviews with 27 HR managers and specialists. Four files describing the AC method from the point of view of the weak and strong sides are based on...
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Assessment centre - validity, possibility and risks in the usage the company's procedure method
Doubková, Dagmar ; Bahbouh, Radvan (referee) ; Kirovová, Iva (referee)
My rigorous thesis is focused on the issue of Assessment Centre method (AC), its validity, contribution and objectivity, ethical rules and difficulties. The selection of competences studied by this method is discussed here as well. Strong and weak sides of the method are described by the SWOT analysis and possible opportunities and threats are pointed out in the work. The structure and the implementation of the AC method as well as its opportunities and real use in practice are described in the theoretical part of the work. This part of the work is also focused on the particular methods used within the AC methods. The differences between the Assessment Centres and Development Centres are brought up here. The AC method is compared with the other procedures which are used for the selection and development of employees. Opportunities and limitations of the validity of the measurement are discussed in this part of the work. The practical part of the work is devoted to the comparison of the AC method with other methods of selection and evaluation concerning the contribution and objectivity. The data analyzed in this comparison have been collected from the interviews with 27 HR managers and specialists. Four files describing the AC method from the point of view of the weak and strong sides are based on...
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