Sökning: "voltage drops"
Visar resultat 6 - 10 av 37 uppsatser innehållade orden voltage drops.
6. The effectivity of vacuum impregnation with glycerol and secondary metabolites on electroporated arugula leaves to improve freezing stability.
Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)Sammanfattning : Freeze damage is a common issue in many food items. The cellular dehydration caused by freezing can be prevented through addition of a cryoprotectant. Research has shown that it is possible to improve the freezing tolerance of plant materials by addition of cryoprotectants, which forms hydrogen bonds with water molecules. LÄS MER
7. Elimination of Harmonic Disturbances in Softstarters
Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknikSammanfattning : Power system infrastructure has been facing many challenges when it comes to harmonics distortion, and power electronic devices are no exception considering their wide usage in the system. In this thesis the focus is on the impact of these system harmonics on the electrical motors which are vastly used in industry for different applications. LÄS MER
8. Elbilsladdnings påverkan på elnätet : Simuleringar av Gävles lokala elnät med olika laddningsmönster
Kandidat-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknikSammanfattning : Transportsektorn står inför en omställning från förbränningsfordon till eldrivna fordon. Detta är en åtgärd för att minska koldioxidutsläppet inom transportsektorn och därmed reducera klimatpåverkan. LÄS MER
9. Metod för analys av kapacitet i befintligt distributionsnät med avseende på mikroproduktion med solceller samt privat elbilsladdning.
Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronikSammanfattning : Two strong trends in society which may have a major impact on the electricity grid load in the near future are the expansion of micro production with solar cells, and the increasingly prominent role of electric cars in the automotive market. In this work, an attempt is made to develop standardized and not too time-consuming methods to study how different future scenarios with large-scale expansion of private micro production with solar cells, as well as a very proportion of cars are electric and being charged at home, affect the various parts of the network with regarding voltage levels and load rating. LÄS MER
10. Investigation of ECG electrodes for burn wounds
Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Institutionen för elektroteknikSammanfattning : This project aims to investigate a variety of electrodes for ECG (electrocardiogram) measurements and find suitable ones for burn wounded skin in association with the Burn center in Uppsala University Hospital. To this purpose, the electrical properties (in particular, electrical impedance and equivalent circuit) of electrodes and the influence of the skin on the electrical properties are looked into, and various common artefacts in ECG measurements are investigated, such as wandering baseline (caused by perspiration, respiration, patient movement and poor electrode contact), muscle tremor artefact, 50-60 Hz power line interference and measurement noise. LÄS MER
