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Resistance saw
Kalčík, Petr ; Minárik, Vladimír (referee) ; Procházka, Petr (advisor)
This work is focused on the design and construction of component parts of resistance saw. Mechanical parts consist of a movable bracket and a taut cutting wire of Constantan. Electrical parts are designed to supply and control temperature of the cutting wire. The current intensity in the cutting wire is compared with the required current intensity. The difference of these two measurements is fed into a PI - controller. The next part is a PWM generator which generates the square wave signal. The pulse ratio of this signal is proportional to the required temperature of the cutting wire. This signal switches a switching converter that consists of a power transistor P-MOSFET IRF5210 and a diode MBR20100CT. Choking coil with a ferrite E core and with the cutting wire is connected to the output of the converter.
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Automation of the farming system
Šimek, Martin ; Jirgl, Miroslav (referee) ; Arm, Jakub (advisor)
This thesis deals with the issue of the Internet of Things and its use in the automation of gardening areas. The processes that are necessary to maintain the operation of gardening facilities are both physically demanding and time consuming. The aim of this thesis will be to design a system that will reduce the need for human intervention in performing these processes. The main prerequisites of the proposed system include the modularity of the whole concept. The automation of the gardening areas focuses mainly on the irrigation system, which will be controlled by the designed wireless modules. These are STEM-01 modules which have the task of measuring soil volumetric water content, soil electrical conductivity, soil temperature and ambient temperature and relative humidity in the area, BVM-01 modules which provide irrigation in the required area and last but not least FDM-01 modules with which it will be possible to enrich the water located in the drip pipe and used to irrigate the mentioned areas with mineral fertilizers.
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Adaptive Control of a DC Drive
Krkoška, Roman ; Huták, Petr (referee) ; Skalický, Jiří (advisor)
The master’s thesis deals with method of adaptive control of electrical drives. It aims at control of DC motor with using self tunning controller (STC) and gain-schedulink in simulative enviroment of MATLAB. The first part of the thesis deals with of basic methods adaptive control of electrical drives and with of basic identification methods, computation of controller parameters and control laws of controllers. The second part of the thesis is aimed at applying adaptive controllers to mathematical model of controlled system. Include monitoring parameters of identification The thesis contains originate programs include source files.
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Frequency method for motor parameters identification
Zimmert, Martin ; Buchta, Luděk (referee) ; Pohl, Lukáš (advisor)
This bachelor´s thesis deals with improved frequency method for motor parameters Identification. The goal of this thesis is to get an overview about identification method and simulate it on motor model in the Simulink and then to verify functionality of the method on the real motor. Firstly there are informations about a motor with permanent magnets and its control. Then there is an application of identification method for complete motor model. In the next part is measurement of the real motor. In the end is design of controller and discrete filter of identification signal.
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Scooter with a BLDC drive
Doležal, Lukáš ; Kozovský, Matúš (referee) ; Veselý, Libor (advisor)
The bachelor thesis is focused on a design of a propulsion system for folding portable scooter. The BLDC motor is used as a propulsion. The thesis deals with the design of electronics for sensor control. Motor is controlled by six-step commutation method. In the practical part of thesis the controller of current is set and functionality is checked.
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Automation of the farming system
Šimek, Martin ; Jirgl, Miroslav (referee) ; Arm, Jakub (advisor)
This thesis deals with the issue of the Internet of Things and its use in the automation of gardening areas. The processes that are necessary to maintain the operation of gardening facilities are both physically demanding and time consuming. The aim of this thesis will be to design a system that will reduce the need for human intervention in performing these processes. The main prerequisites of the proposed system include the modularity of the whole concept. The automation of the gardening areas focuses mainly on the irrigation system, which will be controlled by the designed wireless modules. These are STEM-01 modules which have the task of measuring soil volumetric water content, soil electrical conductivity, soil temperature and ambient temperature and relative humidity in the area, BVM-01 modules which provide irrigation in the required area and last but not least FDM-01 modules with which it will be possible to enrich the water located in the drip pipe and used to irrigate the mentioned areas with mineral fertilizers.
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Frequency method for motor parameters identification
Zimmert, Martin ; Buchta, Luděk (referee) ; Pohl, Lukáš (advisor)
This bachelor´s thesis deals with improved frequency method for motor parameters Identification. The goal of this thesis is to get an overview about identification method and simulate it on motor model in the Simulink and then to verify functionality of the method on the real motor. Firstly there are informations about a motor with permanent magnets and its control. Then there is an application of identification method for complete motor model. In the next part is measurement of the real motor. In the end is design of controller and discrete filter of identification signal.
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Scooter with a BLDC drive
Doležal, Lukáš ; Kozovský, Matúš (referee) ; Veselý, Libor (advisor)
The bachelor thesis is focused on a design of a propulsion system for folding portable scooter. The BLDC motor is used as a propulsion. The thesis deals with the design of electronics for sensor control. Motor is controlled by six-step commutation method. In the practical part of thesis the controller of current is set and functionality is checked.
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Power supply
Matějů, Jan ; Uher, Miroslav (referee) ; Beneš, Petr (advisor)
This work is focused on development of a laboratory power source with low output ripple, its construction and measuring its basic parameters. Basic point of interestion is systems design of a digital controled power source. Document describes problems which has occured and its solutions. Describes designing of a circuit board, its construction and measuring its parameters. Below describes system design, construction and examination of a display and keyboard for operating the device. As a result of this work is realized and measured system design, which achieved relativem low levels of output ripple, short reaction time on change of load, but slower reaction of a current limit. Some parameters has not been entirely fine-tuned, especialy speed of reaction of current limit, amplitude of output distortion volage and stability diring short circuit on output clamps.
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Resistance saw
Kalčík, Petr ; Minárik, Vladimír (referee) ; Procházka, Petr (advisor)
This work is focused on the design and construction of component parts of resistance saw. Mechanical parts consist of a movable bracket and a taut cutting wire of Constantan. Electrical parts are designed to supply and control temperature of the cutting wire. The current intensity in the cutting wire is compared with the required current intensity. The difference of these two measurements is fed into a PI - controller. The next part is a PWM generator which generates the square wave signal. The pulse ratio of this signal is proportional to the required temperature of the cutting wire. This signal switches a switching converter that consists of a power transistor P-MOSFET IRF5210 and a diode MBR20100CT. Choking coil with a ferrite E core and with the cutting wire is connected to the output of the converter.
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