Sökning: "rectification"

Visar resultat 26 - 30 av 43 uppsatser innehållade ordet rectification.

  1. 26. Active rectification and control of magnetization currents in synchronous generators with rotating exciters : Implementation of the SVPWM algorithm using MOSFET technology

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Tomas Johansson; [2015]
    Nyckelord :rectification; SVPWM; space vector pulse width modulation; current control; active rectification; three phase;

    Sammanfattning : This thesis aims to design and build a power electronics system for the rectification and control of magnetization currents in synchronous generators with rotating exciters.The rotating exciter provides three-phase AC while the generator rotor needs DC with a high degree of control. LÄS MER

  3. 27. Generation of Short Intense Terahertz pulses Through Optical Rectification

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

    Författare :Carl Ekström; [2015]
    Nyckelord :Terahertz; THz; Optical Rectification; OR; Photonics; Optics; LiNbO3; Physics and Astronomy; Technology and Engineering;

    Sammanfattning : The lack of sources that generates intense THz pulses have in many years limited the field of THz science. Until recently intense THz pulses have been hard to generate using nonlinear crystals such as Lithium Niobate (LiNbO3) with high efficiency. LÄS MER

  4. 28. DESIGN AND PROTOTYPING OF A LOW-SIDE ACTIVE CLAMPFORWARD CONVERTER POWER SUPPLY : Comparison with an existing Fixed Frequency Resonant Power Supply

    M1-uppsats, Högskolan i Gävle/Avdelningen för elektronik, matematik och naturvetenskap

    Författare :Christina Eklöv; [2014]
    Nyckelord :Electronics; electronic engineering; power supply; forward converter; active clamp;

    Sammanfattning : This thesis details the design, build and commissioning of an active clamp forward converter with synchronous rectification and comparison to an existing fixed frequency resonant switching converter power supply. The points of comparison are: noise and ripple, power efficiency, number of components, size of components and cost. LÄS MER

  5. 29. Improving information perception from digital images for users with dichromatic color vision

    Master-uppsats, Institutionen för teknik och naturvetenskap; Tekniska högskolan

    Författare :Omid Shayeghpour; [2013]
    Nyckelord :Color; Color vision; Colorblindness; Color vision deficiencies; Color discrimination; Color transformation method; Recoloring; Color imaging; Color correction; Improving information perception; Color models; HSV color model; Color vision simulation; Color;

    Sammanfattning : Color vision deficiency (CVD) is the inability or limited ability to recognize colors and discriminate between them. A person with this condition perceives a narrower range of colors compared to a person with a normal color vision. A growing number of researchers are striving to improve the quality of life for CVD patients. LÄS MER

  7. 30. Printed Schottky Diodes based upon Zinc Oxide Materials

    Master-uppsats, Fysik och elektroteknik; Tekniska högskolan

    Författare :Emma Persson; [2013]
    Nyckelord :Schottky diode; semiconductor; rectifier; diode bridge; printed electronics; Teknisk fysik; Teknisk fysik;

    Sammanfattning : The aim of this master thesis was to develop a process for fabricating Schottky diodes, using techniques that are suitable for cheap large volume mass production e.g. printing, with tetrapod structured ZnO as the semiconductor. LÄS MER