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Inovation of measurement equipment used for analyzing of photovoltaick cells
Otépka, Jakub ; Bača, Petr (referee) ; Vaněk, Jiří (advisor)
This bachelor thesis deals with the design of a tachometer which is used to measure and display of mechanical aperture speed of a measuring equipment for the defect analysis of solar cells using the photoluminescence method. This work is divided into three parts. The first section describes the principle of solar cells, the principle of luminescence radiation and its types. Next the defects of solar cells are analyzed. The second part discusses the theory of tachometers, the principles and methods of loading pulses. The third part is then analyzed the design and construction of the selected type tachometer.
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Measuring of parameters dimmable LED sources
Kubeša, Radek ; Štěpánek, Jaroslav (referee) ; Baxant, Petr (advisor)
The bachelor thesis deals with the dimmable LED light sources. The theoretical part at the beginning is devoted to the light and the basic photometric quantities, analyzes the light sources and their parametres. It also describes the operating principle of LEDs, construction, power, and control the brightness of LED light sources. The practical part is focused on the measurement and evaluation of operating parameters selected samples of LED light sources.
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Modeling HF diode in Comsol Multiphysics
Truhlář, Michal ; Pokorný, Michal (referee) ; Raida, Zbyněk (advisor)
This work brings understanding effects in semiconductor diode by rise P-N junction. Attention devote to suggested high frequency semiconductor diode in program Comsol Multiphysics 3.3.Atention is concentrated to optimization model of diode so as volt-ampere characteristic resembles to real characteristics of diodes. Is tried to find a solution to entourage P-N devolution, where this program sensitive on changes geometry’s barriers of these is different types P-N. In work is summary of treatment and advancing by divining and by optimization of high frequency diode. First part describes semiconductor diode like component used in the electrotechnics, which explains rise, descriptions, using and types of used diodes. Second part includes progress of scaling concrete semiconductor high frequency silicon diode. In this work is braining to optimization model of diode to real and research parameters, which influence her descriptions. In last part of my bachelor’s work was created a simple program in Matlab for global optimization. This program by connected with model of diode and check up possibilities of optimizations their parameters
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Anyalyze of photovoltaic cell by noise diagnostic
Husák, Marek ; Sládek, Petr (referee) ; Vaněk, Jiří (advisor)
The master’s thesis deals with the noise diagnostic in the solar cells. Describes the main kinds of noises. The samples were quality and reliability screened using noise reliability indicators. The samples were surveyed by measuring the I-V characteristics, the noise spectral density as a function of forward voltage and frequency. It was calculated the noise spectral density as a function of forward current.
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Inovation of measurement equipment used for analyzing of photovoltaick cells
Otépka, Jakub ; Bača, Petr (referee) ; Vaněk, Jiří (advisor)
This bachelor thesis deals with the design of a tachometer which is used to measure and display of mechanical aperture speed of a measuring equipment for the defect analysis of solar cells using the photoluminescence method. This work is divided into three parts. The first section describes the principle of solar cells, the principle of luminescence radiation and its types. Next the defects of solar cells are analyzed. The second part discusses the theory of tachometers, the principles and methods of loading pulses. The third part is then analyzed the design and construction of the selected type tachometer.
|
|
|
Measuring of parameters dimmable LED sources
Kubeša, Radek ; Štěpánek, Jaroslav (referee) ; Baxant, Petr (advisor)
The bachelor thesis deals with the dimmable LED light sources. The theoretical part at the beginning is devoted to the light and the basic photometric quantities, analyzes the light sources and their parametres. It also describes the operating principle of LEDs, construction, power, and control the brightness of LED light sources. The practical part is focused on the measurement and evaluation of operating parameters selected samples of LED light sources.
|
|
|
Modeling HF diode in Comsol Multiphysics
Truhlář, Michal ; Pokorný, Michal (referee) ; Raida, Zbyněk (advisor)
This work brings understanding effects in semiconductor diode by rise P-N junction. Attention devote to suggested high frequency semiconductor diode in program Comsol Multiphysics 3.3.Atention is concentrated to optimization model of diode so as volt-ampere characteristic resembles to real characteristics of diodes. Is tried to find a solution to entourage P-N devolution, where this program sensitive on changes geometry’s barriers of these is different types P-N. In work is summary of treatment and advancing by divining and by optimization of high frequency diode. First part describes semiconductor diode like component used in the electrotechnics, which explains rise, descriptions, using and types of used diodes. Second part includes progress of scaling concrete semiconductor high frequency silicon diode. In this work is braining to optimization model of diode to real and research parameters, which influence her descriptions. In last part of my bachelor’s work was created a simple program in Matlab for global optimization. This program by connected with model of diode and check up possibilities of optimizations their parameters
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|
|
Anyalyze of photovoltaic cell by noise diagnostic
Husák, Marek ; Sládek, Petr (referee) ; Vaněk, Jiří (advisor)
The master’s thesis deals with the noise diagnostic in the solar cells. Describes the main kinds of noises. The samples were quality and reliability screened using noise reliability indicators. The samples were surveyed by measuring the I-V characteristics, the noise spectral density as a function of forward voltage and frequency. It was calculated the noise spectral density as a function of forward current.
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