Sökning: "converter efficiency"

Visar resultat 1 - 5 av 105 uppsatser innehållade orden converter efficiency.

  1. 1. Application of Fourier Transforms to time-resolved ambient pressure spectroscopy operando studies of CO oxidation over Pt(111)

    Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

    Författare :Grigore-Leon Ratiu; [2024]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : The study of heterogeneous catalysis has important implications in increasing the efficiency of industrial processes and in reducing the emissions of greenhouse gases from sources such as automobiles. A reaction with high industrial relevance is the oxidation of CO on noble metal catalysts. LÄS MER

  3. 2. Extending Wireless Power Transfer Range for Self-Powered Micro Devices with mm-size Antenna

    Master-uppsats, Linköpings universitet/Elektroniska Kretsar och System

    Författare :Natachai Terawatsakul; [2023]
    Nyckelord :;

    Sammanfattning : The primary challenge in expanding the wireless power transfer range for miniaturized self-powered micro devices is the limited RF energy harvesting due to the small effective area and low gain of the mm-sized antennas used in these devices. This thesis introduces a method for extending the distance between an external energy source antenna (TX) and a micro-device antenna (RX) to more than 10 cm. LÄS MER

  4. 3. Frekvensomriktarens påverkan i dagens industri

    Kandidat-uppsats, Högskolan i Gävle/Avdelningen för elektroteknik, matematik och naturvetenskap

    Författare :Andreas Tränstad; [2023]
    Nyckelord :Variable frequency drive; frequency converter industry; frequency converter energy; frequency converter sustainability;

    Sammanfattning : The purpose of the study was to cover the impact of variable frequency drives in to-day's industry. A partial aim was also to study perspectives regarding the advantages and disadvantages of the variable frequency drive, its function based on sustainability, production efficiency and demand. LÄS MER

  5. 4. LCC-analys av en elmotordrift

    Kandidat-uppsats, Högskolan i Gävle/Elektronik

    Författare :Tobias Östlund; [2023]
    Nyckelord :LCC analysis IM-motor SynRM IE IE-class VFD Frequency converter ABB DTC PWM Energy efficiency Pump Fan IEC dimensioning; LCC analys asynkronmotor SynRM IE IE-klass FRO Frekvensomriktare ABB DTC Energi Energieffektivisering PWM Pump Fläkt Energiklass IEC Ekodesigndirektivet Dimensionering Nuvärde Elområden;

    Sammanfattning : AFRY är ett ingenjörsföretag som har efterfrågat en studie som går ut på att ur ett elkonstruktionsperspektiv hitta enklare åtgärder för att bespara industrier pengar ge-nom att utföra energieffektiva investeringar i kontinuerliga elmotordrifter. Detta är extra relevant idag då energikostnaderna ökat anmärkningsvärt de senaste åren. LÄS MER

  7. 5. Analysis of high-voltage low-current DC/DC converters for electrohydrodynamic pumps

    Kandidat-uppsats, Uppsala universitet/Institutionen för elektroteknik

    Författare :Sigge Axelsson; Jonas Gartner; Axel Stafström; [2023]
    Nyckelord :high-voltage; low-current; low-power; DC DC; DC-DC; high-gain; converter; electrohydrodynamic pump; EHD; transformerless converter; Royer-based converter; resonant Royer oscillator; Cockroft-Walton voltage multiplier; CWVM; voltage multiplier; series-connected positive-negative voltage multiplier; SPNVM; planar air-core transformer; planar transformer; high-freqency Royer-based converter; overcurrent protection; LT8331; gallium nitride; GaN; planar PCB-integrated transformers;

    Sammanfattning : Moving parts cause vibrations and tend to wear out. In applications where maintenance is complicated, solutions without moving parts are therefore advantageous. Electrohydrodynamic pumps are such a solution. Instead of mechanical propulsion, they use strong electric fields to induce movement in a dielectric cooling liquid. LÄS MER