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Design of current sense comparators for automotive front lighting
Schilhab, Jan ; Prokop, Roman (referee) ; Kledrowetz, Vilém (advisor)
The diploma thesis deals with the problem of current sensing on integrated DC-DC converter switches using a comparator with reference current. Various current sensing methods are discussed in the thesis and a method of sensing current on a MOS switch using a smaller channel width reference transistor is thoroughly described. The paper also describes the basic properties of comparators and a suitable methodology for designing a fast comparator operating continuously in time. A major part of the thesis is devoted to the design of comparator blocks for current sensing at the top and bottom switches on the transistor level and presentation of the results obtained by simulations in Cadence Virtuoso environment. At the end, simulations are presented to verify the function of the designed blocks in a simplified buck DC-DC converter system.
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Design of control unit for two-wheeled self-balancing vehicle
Bastl, Michal ; Klimeš, David (referee) ; Chalupa, Jan (advisor)
This diploma thesis is a part of a project of two students. The aim of the project is to design safer electronics for the unstable balancing vehicle HUMMER and implementation of advanced diagnostics and fault detection. In the first part of the project we analysed the original vehicle using the FMEA analyse and created a new concept of the vehicle. The second part of the project describes a new hardware. I designed and tested the power electronics, control unit and supplies. The outputs of the work are prototypes which allow testing a new concept.
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Design of a current data logger for LPWA sensors
Mikulášek, Michal ; Možný, Radek (referee) ; Štůsek, Martin (advisor)
This Master thesis deals with the design and construction of a measuring device for measuring and the current consumption logging of sensors using LPWAN (Low Power Wide Area Network) technology. The theoretical part of the thesis firstly summarizes selected LPWAN technologies. Selected technologies, namely: LoRaWAN, Sigfox and Narrowband IoT (NB-IoT), are described more in detail. Further, the current measurement techniques are briefly discussed. The main focus is given to the current shunt measuring methods. The second half of thesis describes procedures conducted during the design and construction of a measuring device. The current measuring is based on the current shunt circuit complemented by the voltage amplification circuit, whose output is subsquently converted into digital form using an AD converter. The thesis describes in great detail the procedures for selecting individual components and important processes used in design of printed circuit boards. An integral part of the measuring device implementation is the design and implementation of control software, which is described in detail and supplemented by workflow charts underlining the entire description. The implementation of the entire measuring device is completed by the design and implementation of the cover box using 3D printing technology. Finally, the specifications of designed device are briefly discussed based on the limits of the used components.
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Microprocessor controlled voltage supply
Michalčík, Bohumil ; Valach, Soběslav (referee) ; Macho, Tomáš (advisor)
The first part of my work includes in general Microprocessor controlled voltage supplies. The second part is the main design of Microprocessor controlled voltage supply, based on the manufacturer datasheets and recommended involvement connections. The electric scheme and printed circuit board was developed with eagle layout editor version 5.4.0. The power supply was designed for maximum output voltage 30V and maximal flowing electric current 5A.
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Design of a current data logger for LPWA sensors
Mikulášek, Michal ; Možný, Radek (referee) ; Štůsek, Martin (advisor)
This Master thesis deals with the design and construction of a measuring device for measuring and the current consumption logging of sensors using LPWAN (Low Power Wide Area Network) technology. The theoretical part of the thesis firstly summarizes selected LPWAN technologies. Selected technologies, namely: LoRaWAN, Sigfox and Narrowband IoT (NB-IoT), are described more in detail. Further, the current measurement techniques are briefly discussed. The main focus is given to the current shunt measuring methods. The second half of thesis describes procedures conducted during the design and construction of a measuring device. The current measuring is based on the current shunt circuit complemented by the voltage amplification circuit, whose output is subsquently converted into digital form using an AD converter. The thesis describes in great detail the procedures for selecting individual components and important processes used in design of printed circuit boards. An integral part of the measuring device implementation is the design and implementation of control software, which is described in detail and supplemented by workflow charts underlining the entire description. The implementation of the entire measuring device is completed by the design and implementation of the cover box using 3D printing technology. Finally, the specifications of designed device are briefly discussed based on the limits of the used components.
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Microprocessor controlled voltage supply
Michalčík, Bohumil ; Valach, Soběslav (referee) ; Macho, Tomáš (advisor)
The first part of my work includes in general Microprocessor controlled voltage supplies. The second part is the main design of Microprocessor controlled voltage supply, based on the manufacturer datasheets and recommended involvement connections. The electric scheme and printed circuit board was developed with eagle layout editor version 5.4.0. The power supply was designed for maximum output voltage 30V and maximal flowing electric current 5A.
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Design of control unit for two-wheeled self-balancing vehicle
Bastl, Michal ; Klimeš, David (referee) ; Chalupa, Jan (advisor)
This diploma thesis is a part of a project of two students. The aim of the project is to design safer electronics for the unstable balancing vehicle HUMMER and implementation of advanced diagnostics and fault detection. In the first part of the project we analysed the original vehicle using the FMEA analyse and created a new concept of the vehicle. The second part of the project describes a new hardware. I designed and tested the power electronics, control unit and supplies. The outputs of the work are prototypes which allow testing a new concept.
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