Sökning: "Passive rectifier"

Hittade 5 uppsatser innehållade orden Passive rectifier.

  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. Isolated Single-Stage Interleave Resonant PFC Rectifier with Active and Novel Passive Output Ripple Cancellation Circuit

    Master-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Abidemi Oluremilekun Eleyele; [2020]
    Nyckelord :single-stage AC DC converter; bridgeless power factor correction PFC rectifier; active passive ripple cancellation; zero current switching ZCS ; zero voltage switching ZVS ; Electric vehicle EV charger; LLC;

    Sammanfattning : With the increasing demand for fast, cheaper, and efficient power converters come the need for a single-stage power factor correction (PFC) converter. Various single-stage PFC converter proposed in the literature has the drawback of high DC bus voltage at the input side and together with the shift to wide bandgap switches like GaN drives the converter cost higher. LÄS MER

  4. 3. Evaluation of power quality and common design concept for AC-DC converters in aircraft

    Uppsats för yrkesexamina på avancerad nivå,

    Författare :Andreas Brolund; [2017]
    Nyckelord :AC-DC; converter; aircraft; power electronics; MOSFET; MEA; More electric aircraft; Delta-switch; ATRU; Auto-transformer rectifier unit; Auto-transformer; Vienna rectifier; passive rectifier; active rectifier; power factor correction; APFC; PFC; MATLAB; Simulink; THD; total harmonic distortion;

    Sammanfattning : This master thesis has been carried out in collaboration with Saab, Avionics Systems in Jönköping, Sweden, during the spring of 2017. The thesis investigates unidirectional rectifier topologies in aircraft and the focus has been on evaluating the power quality requirements according to the aircraft standards, in the course of the More Electric Aircraft concept. LÄS MER

  5. 4. An Ambient Energy Harvesting System for Passive RFID Applications

    Kandidat-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Xiaoyu Wang; [2015]
    Nyckelord :;

    Sammanfattning : Radio-frequency identification(RFID)is the wireless use of electromagnetic fields to transfer data, for the purpose of automatically identifying and tracking tags attached to objects. It is one of hot topics recently. The power supply is one of key factors restricting the lifetime and performance of RFID. LÄS MER

  7. 5. LQG-control of a Vertical Axis Wind Turbine with Focus on Torsional Vibrations

    Uppsats för yrkesexamina på avancerad nivå, Avdelningen för systemteknik

    Författare :Adam Alverbäck; [2012]
    Nyckelord :LQG-control; Vertical axis wind turbine; torsional oscillations;

    Sammanfattning : In this thesis it has been investigated if LQG control could be used to mitigate torsional oscillations in a variable speed, fixed pitch wind turbine. The wind turbine is a vertical axis wind turbine with a 40 m tall axis that is connected to a generator. LÄS MER