Sökning: "övertoner"
Visar resultat 11 - 15 av 95 uppsatser innehållade ordet övertoner.
11. Harmonic Emissions in Microgrids
Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automationSammanfattning : “Affordable and clean energy” is EUs 7th Sustainable Development Goal and includes an increase of renewable energy generation in the global energy mix. A lot of the responsibility falls on the energy sector to transform and obtain solutions for a more sustainable future. LÄS MER
12. FMCW mmWave Radar for Detection of Pulse, Breathing and Fall within Home Care
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Countless of elderly people fall and get hurt within their homes, worldwide, every year, and as they can not always reach out for help themselves, they end up helplessly waiting for someone to notice what has occurred. Throughout this work, it is investigated if remote sensing of the mmWave FMCW radar IWR6843AOPEVM can be adopted to detect the incident of falls, and also detect the vital signs of the human subject. LÄS MER
13. Load Control Aerodynamics in Offshore Wind Turbines
Master-uppsats, KTH/Kraft- och värmeteknologiSammanfattning : Due to the increase of rotor size in horizontal axis wind turbine (HAWT) during the past 25 years in order to achieve higher power output, all wind turbine components and blades in particular, have to withstand higher structural loads. This upscalingproblem could be solved by applying technologies capable of reducing aerodynamic loads the rotor has to withstand, either with passive or active control solutions. LÄS MER
14. Analysis of Different Switching Patterns to Minimize Losses in a Six- Phase Drive for Marine Application
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Multiphase machines have gained a lot of popularity during the recent years, as they offer certain benefits over their three- phase counterparts. This work investigates the losses of a six- phase drive system for a marine application when supplied by four different switching patterns (also referred to as modulators). LÄS MER
15. Elkvalitet i industrinät : Snabba spänningsvariationerns påverkan på elektrisk utrustning
M1-uppsats, Umeå universitet/Institutionen för tillämpad fysik och elektronikSammanfattning : Elkvalitet beror på flera olika faktorer, exempelvis kortvarig spänningshöjning, kortvarig spänningssänkning, snabba spänningsvariationer (flimmer), spänningssprång, transienter, övertoner eller spänningsosymmetri. Den vanligaste åtgärden för att förbättra elkvaliteten i ett industrinät med ljusbågsugn och höga nivåer av snabba spänningsvariationer är att använda sig av reaktiv effektkompensering. LÄS MER