Sökning: "Capacitive currents"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden Capacitive currents.

  1. 1. Tribological characterization of a ball bearing subjected to an electric field : Electric drivetrain tribology

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Muhammad Umar Farooq; [2023]
    Nyckelord :Ball bearing; electric drivetrain; tribology; electric field; characterization; bearing currents; discharge;

    Sammanfattning : Electric machines are widely used in for instance the automotive industry in electric vehicles and in wind turbines. The electrical machines have mechanical bearings as an integral part used to transmit power and load. In addition, the main function includes reducing friction between interacting surfaces. LÄS MER

  3. 2. Model verification and common mode current analysis of grid connected three phase two level converters

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

    Författare :Simon Lindvall; Richard Haraldsson; [2021]
    Nyckelord :active filter; EMC; EMI; converter; common mode; differential mode; shunt active filter; parasitic elements; Technology and Engineering;

    Sammanfattning : In this Master’s thesis an in-depth model of a shunt active filter for high frequency analysis is constructed. The purpose is to enable analysis of higher frequency behavior reaching 1MHz. Using the high frequency model, common mode currents can be simulated. LÄS MER

  4. 3. Hardware-In-the-Loop simulation of a small scale prototype of a Wave Energy Converter

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Författare :Anton Magnusson; [2020]
    Nyckelord :Hydrodynamics; Hardware-In-the-Loop; WEC-Sim; Wave Energy Converter; NEMOH; Hydrodynamik; Hardware-In-the-Loop; WEC-Sim; vågenergikonverterare; NEMOH;

    Sammanfattning : Renewable energy sources are a hot topic, both when it comes to climate change and the constant increase in demand of electricity due to population growth and a more electrified society. One such energy source is wave energy - an energy source with great potential but still relatively new with the need for further development. LÄS MER

  5. 4. IT-kopplade AC-nät : Enpoliga jordfel i befintlig elanläggning under jord

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :Linus Lycksell; [2020]
    Nyckelord :IT-system IT system IT-koppling IT koppling enpoliga jordfel lågspänning lågspänningsnät isolationsövervakning jordfelsövervakning konstgjord neutralpunkt kapacitiv koppling;

    Sammanfattning : In some electrical facilities for underground mining, IT-system grounding is used for processes of high priority. This report explains why such systems are used in these kinds of environments, what happens when single-line-ground faults occur and how does the fault protection and monitoring devices handle those faults in accordance to current regulations and standards. LÄS MER

  7. 5. Projektering av allmänt lokalnät i landsbygdsmiljö med analys av kapacitivaströmmar

    M1-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Amanda Solberg; Christoffer Ohrzén; [2019]
    Nyckelord :kapacitiva strömmar; projektering; kabelförläggning; luftledning; lokalnät; nollpunktsreaktor;

    Sammanfattning : A general local powerline has implemented to mimic a lifelike powerline build around 1960s in thecountryside. Since reconstruction is needed a new projection is made of the area to improve the powerquality. The projection includes the old transmission lines will be replaced with underground powercables to make it weatherproof. LÄS MER