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National Repository of Grey Literature

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Classification and modelling of LED light sources in terms of sensitivity to supply voltage fluctuations Hudáč, Tomáš ; Kukačka, Leoš (referee) ; Drápela, Jiří (advisor) Cieľom tejto práce je preskúmať a charakterizovať celkovú odolnosť voči flickru v LED svetelných zdrojoch dostupných na súčasnom trhu, a vytvoriť modelu LED svetelného zdroja. Na nájdenie reprezentatívnych vzoriek LED svetelných zdrojov, bola prevedená analýza online trhu, ktorá ukazuje najpredávanejšie typy. Na základe výsledkov z analýzy sa získalo 31 vzoriek. S rôznymi LED technológiami a rôznymi možnosťami regulácie výkonu, napríklad bezdrôtovo alebo triakom. Vykonaním meraní za ideálnych podmienok napájania a rozobraním niektorých vzoriek boli celkovo identifikované 4 hlavné triedy s rôznymi topológiami napájacích obvodov. Ďalej sa vykonali testy ich citlivosti na blikanie a imunitou voči blikaniu. Na základe získaných výsledkov testov bola každá topológia ovládača ohodnotená podľa jej celkovej odolnosti voči blikaniu. V závere práce bol navrhnutý model v Simulinku, ktorý úspešne simuloval IH GF krivky v porovnaní s nameranými hodnotami Detailed record

Light - Body - Space Votavová, Lenka ; Jezbera, Ladislav (referee) ; Ambrůz, Jan (advisor) Light - body - space - Bulb Instalation includes sixty incandescent bulbs (25 W), which flashing in certain interval. Bulbs covered all floor and their intensity of light create and change space around. Spectator has an opportunity to enter to the quickly changing field of instalation, which can confused him. Detailed record

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