Sökning: "halvbrygga"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet halvbrygga.

  1. 1. Design and Control of Bidirectional Converters for DC Microgrids

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

    Författare :Gustav Eckerbom; Villiam Petermann; [2023]
    Nyckelord :;

    Sammanfattning : This study aims to summarize the design of two common types of bidirectional DC-DC convertersfound in microgrids, as well as use two distinct control methods for each converter and validate theirperformance. Microgrids are decentralized, small-scale power systems that can operateindependently of the main power grid and are an important solution in order to integrate moreintermittent energy sources, such as solar and wind power, into the energy mix. LÄS MER

  3. 2. Comparative Analysis of Several Designs of Modular Multilevel Converters with Interleaved Half-Bridge Submodules

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

    Författare :Lingyu Chen; [2022]
    Nyckelord :Modular multilevel converters MMC ; interleaved half-bridge submodule; interleaved converters; power loss calculation; converter efficiency; converter dimensions; Modulära multilevel-omvandlaren; interfolierad halvbrygga submodul; interfolierade omvandlare; effektförlustberäkning; omvandlareffektivitet; omvandlardimensioner;

    Sammanfattning : The Modular Multilevel Converter (MMC) is one of the most commonly used active converters in the high-/medium-voltage sector due to its many advantages such as high scalability, high efficiency, modularity and low harmonic contents. However, in low-voltage and high-current applications, classical MMC designs are not very economical. LÄS MER

  4. 3. Design of Resonant Filters for AC Current Magnification : Heating of Li-ion Batteries by Using AC Currents

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

    Författare :Nikolina Djekanovic; [2018]
    Nyckelord :Current control; injection of alternating current; internal heat dissipation; LCL filter; Lithium-ion batteries; power efficiency; resonance phenomenon;

    Sammanfattning : Using alternating current in order to heat batteries at sub-zero temperatures is a method,which is investigated in-depth by an increasing number of study groups. The thesis considersthe resonance phenomenon with the intention to use alternating current amplificationand battery’s impedance in order to induce power dissipation inside the battery, and in thisway increase its temperature. LÄS MER

  5. 4. Simulation and Construction of a Half-Bridge Class D Audio Amplifier

    Kandidat-uppsats, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Johan Engstrand; Niklas Kavathatzopoulos; Jonathan Nordenholm; [2018]
    Nyckelord :amplifier; class D; half-bridge; simulation; LTspice; KiCad; förstärkare; klass D; halvbrygga;

    Sammanfattning : Usage of class D audio amplifiers has become increasingly widespread in recent years, mainly due to their high efficiency, which can reach almost 100 %. Class D amplifiers can also be compact, making them suitable for mobile applications. In contrast, the most efficient conventional amplifiers such as class B can reach a maximum efficiency of 78. LÄS MER

  7. 5. Theoretical Design of a Single Phase 2kW Power Supply with 1.5kV DC Output

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Institutionen för teknikvetenskaper

    Författare :Per Mossadeghi Björklund; [2014]
    Nyckelord :;

    Sammanfattning : This 15hp degree project in electrical engineering is carried out at ScandiNova Systems AB in Uppsala, Sweden. The company constructs pulse generators used in areas such as sterilization or radiation therapy. LÄS MER