Sökning: "instability"

Visar resultat 21 - 25 av 677 uppsatser innehållade ordet instability.

  1. 21. Sensorless Control of Synchronous Reluctance Machines and Permanent Magnet Synchronous Machines for Pump Applications

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Erik Lindberg; [2023]
    Nyckelord :Variable speed drives; Sensorless control; Luenberger observer; Synchronous reluctance machine; Permanent magnet synchronous machines; Vector control; Model reference adaptive system; Variabel hastighetsreglering; Sensorlös reglering; Luenberger observatör; Synkron reluktansmaskin; Permanentmagnetmaskin; Vektorreglering; Adaptiv modelreferensreglering;

    Sammanfattning : Energy efficiency in electric machines is both environmentally and economically important. Water pumps with an integrated Variable Frequency Drive (VFD) and a Permanent Magnet Synchronous Machine (PMSM) have challenged the status quo of the Induction Machine (IM) for water pumps. LÄS MER

  3. 22. Framtidens användning av reservelverk inom eldistribution : En fallstudie på E.ON Energidistribution

    Master-uppsats, Linköpings universitet/Energisystem

    Författare :Gino Lauschke; Isabelle Olsson; [2023]
    Nyckelord :Reservelverk; Reservkraft; Dieselgeneratorer; Batterier; Bränsleceller; HVO; Eldistribution;

    Sammanfattning : Sweden has ambitious climate targets to achieve net zero emissions by 2045. One of the possiblesolutions to achieve this goal is electrification, and electricity use is expected to increase from today's 140 TWh to 170-282 TWh, according to the Swedish Energy Agency's different scenarios. LÄS MER

  4. 23. The indirect effects of Covid-19 : Small-scale farmers and food security in Babati District, Tanzania

    Kandidat-uppsats, Södertörns högskola/Miljövetenskap

    Författare :Annie Rendahl; Malin Åkerman; [2023]
    Nyckelord :;

    Sammanfattning : Covid-19 and the worldwide pandemic have had direct- and indirect effects on people globally. Not least for people in the global south who are mainly affected by the indirect effects that have come from the restrictions of the governments. LÄS MER

  5. 24. Adaptability and Tourism : Changes In Tourism Consumption From Swedish Multi-Person Households

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för marknadsföring och turismvetenskap (MTS)

    Författare :Kevin Aoun; [2023]
    Nyckelord :Inflation; Tourism; Sweden; Family Tourism; Adaptability; Psychology; Global Crises; European Energy Crisis;

    Sammanfattning : This research project investigates the adaptability of travel consumption in Sweden to global crises, with a focus on families. Tourism is a major contributor to the global economy, but it is also highly sensitive to global crises such as natural disasters, political instability, economic recessions, and health pandemics. LÄS MER

  7. 25. Potential till flexibilitet och energilagring : modellering av det framtida bostadsområdet Tarv Västra

    Kandidat-uppsats, SLU/Dept. of Energy and Technology

    Författare :Carl Edling; Markus Fransson; Lina Gudmundsson; Agnes Lindberg; Frida Nordlund; Tova Ohm; [2023]
    Nyckelord :energilagring; energisystem; energilösningar; flexibilitet; batterier; vätgas; termiskt borrhålslager; vätgaslager; vehicle-to-grid; batterilager; efterfrågeflexibilitet;

    Sammanfattning : Knivsta municipality is expanding with new residential areas. Meanwhile, the housing sector already accounts for 40 % of Sweden’s total energy use. LÄS MER