Sökning: "active rectification"

Hittade 5 uppsatser innehållade orden active rectification.

  1. 1. Analysis Of A Wave Power System With Passive And Active Rectification

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Ferdus Wahid; [2020]
    Nyckelord :WEC; Optimal damping coefficient; Power smoothing; Passive rectifier; Active rectifier; Buck converter; Bi-directional DC-DC converter; Flywheel; Battery; Bi-directional voltage source converter; Voltage source inverter;

    Sammanfattning : Wave energy converter (WEC) harnesses energy from the ocean to produce electrical power. The electrical power produced by the WEC is fluctuating and is not maximized as well, due to the varying ocean conditions. As a consequence, without any intermediate power conversion stage, the output power from the WEC can not be fed into the grid. LÄS MER

  3. 2. Fabrication and characterisation of RGB LEDs based on nanowire technology

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Patrik Olausson; [2019]
    Nyckelord :RGB LEDs; InGaN; GaN; nitrides; platelets; nanotechnology; Technology and Engineering;

    Sammanfattning : The white light LEDs of today are usually based on a blue LED and a phosphor, converting the blue light to longer wavelengths. While these phosphor-converted LEDs are extremely efficient compared to incandescent light or fluorescent light, there is still plenty of room for improvement. LÄS MER

  4. 3. Comparison between active and passive rectification for different types of permanent magnet synchronous machines

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Johannes Örnkloo; [2018]
    Nyckelord :PMSG; PMSM; rectification; saliency; converter; wind power;

    Sammanfattning : When using an intermittent source of energy such as wind power together with a synchronous machine a frequency converter system is needed to decouple the generator from the grid, due to the fluctuations in wind speed resulting in fluctuating electrical frequency. The aim of this master's thesis is to investigate how different types of rectification methods affect permanent magnet synchronous machines of different saliency ratios. LÄS MER

  5. 4. 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

  7. 5. 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