Sökning: "variable resistance"

Visar resultat 1 - 5 av 56 uppsatser innehållade orden variable resistance.

  1. 1. 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. 2. Neural Networks for Modeling of Electrical Parameters and Losses in Electric Vehicle

    Magister-uppsats, Högskolan i Skövde/Institutionen för ingenjörsvetenskap

    Författare :Yo Fujimoto; [2023]
    Nyckelord :Artificial neural network; machine learning; random forest; deep learning; electric vehicle; decision tree; k-nearest neighbors; permanent magnet synchronous machine;

    Sammanfattning : Permanent magnet synchronous machines have various advantages and have showed the most superiorperformance for Electric Vehicles. However, modeling them is difficult because of their nonlinearity. LÄS MER

  4. 3. Barriers Preventing Chinese Male Consumers from Purchasing Green Beauty Products

    Magister-uppsats, Lunds universitet/Företagsekonomiska institutionen

    Författare :Bingxin Li; Zikang Chen; [2023]
    Nyckelord :Keywords: Beauty industry; China; Male market; Eco-friendly products; Green beauty products; Usage barrier; Value barrier; Risk barrier; Traditional barrier; Image barrier; Ethical concerns; Purchase intention; Innovation resistance theory; Business and Economics;

    Sammanfattning : Thesis purpose: The purpose of this research is to investigate the barriers to purchasing green beauty products in the Chinese male beauty market, and analyze how ethical concerns moderate the influence of these barriers on purchase intention. Methodology: This study utilized a cross-sectional research design and a quantitative methodology to investigate the association between barriers and Chinese males' purchase intention of eco-friendly beauty products. LÄS MER

  5. 4. Evaluation of Fraction Effective Force during closed chain arm coordination tasks in able-bodied persons and athletes with cerebral palsy : An experimental cross-sectional study

    Master-uppsats, Gymnastik- och idrottshögskolan, GIH/Institutionen för fysiologi, nutrition och biomekanik

    Författare :Kajsa Samuelson; [2022]
    Nyckelord :;

    Sammanfattning : Syfte och frågeställning Syftet med denna masteruppsats är att undersöka effekten av FEF vid genomförande av ettkoordinationstest i övre extremitet i sluten kedja i ett nyutvecklat instrument för att mäta krafti tre riktningar. Syftet är även att se om det finns någon signifikant skillnad mellan enreferensgrupp (AB) och en grupp paraidrottare med cerebral pares (CP). LÄS MER

  7. 5. Dietary fiber content and composition in heritage wheat

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Lisa Andersson; [2022]
    Nyckelord :Heritage cereals; wheat; dietary fiber; fructan; Dacke; Dala Lantvete; Källunda; Ölandsvete;

    Sammanfattning : Wheat is the main food source in the world. A secured production has however been threatened by environmental changes in combination with the need of producing more food for a growing population. As a result, there has been an increasing interest in finding new crop varieties susceptible to abiotic stress. LÄS MER