Essays about: "Single-phase"

Showing result 1 - 5 of 50 essays containing the word Single-phase.

  1. 1. Design and construction of a bidirectional DC/DC converter

    University essay from Uppsala universitet/Elektricitetslära

    Author : Alexander Wallberg; [2019]
    Keywords : Converter; DCDC; Energy storage; Single-phase; Omvandlare; DCDC; Energilager; Single-phase;

    Abstract : A four quadrant general single-phase bi-directional DC/DC converter was designed and constructed for high effect systems. The target application for the DC/DC converter was to be used to transfer energy between different energy storages, a miniature DC power grid and the high voltage AC power city grid. READ MORE

  2. 2. Methods to identify broken neutral fault in LV distribution grids by using existing smart meters infrastructure

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Christoforos Menos-Aikateriniadis; [2019]
    Keywords : ;

    Abstract : The vast majority of Swedish utility network customers for nearly a decade has been supported by Advanced Metering Management (AMM) systems, including smart meters. Vattenfall´s modern smart meters enable a new level of monitoring for LV networks and improved MV network supervision. READ MORE

  3. 3. Design and Development of Light Weight High Entropy Alloys

    University essay from Högskolan i Jönköping/JTH, Material och tillverkning

    Author : Akash Avinash Gondhalekar; [2019]
    Keywords : High Entropy Alloys; CCAs; Solid Solutions; Intermetallic Compounds; Thermodynamic; Multicomponent; Microstructure; Mechanical Properties;

    Abstract : The main aim of this thesis was to design and develop new Aluminium based compositionally complex alloys (CCAs) using the high entropy alloy (HEA) concept, and to understand their evolution of microstructures during casting and also after the secondary process which is heat-treatment, and finally to evaluate their subsequent mechanical properties. Prior to the development of alloys, a computational technique ThermoCalc was used which helped in understanding the phase formation in various results. READ MORE

  4. 4. High-Frequency Voltage Distribution Modelling of a Slotless PMSM from a Machine Design Perspective

    University essay from KTH/Elkraftteknik

    Author : Patrik Brauer; [2018]
    Keywords : Windings; drives; transients; surges; steep-fronted; slotless; litz-wire; effective relative permeability; Lindningar; elektriska drivlinor; transienter; spänningspulser; litz-tråd; effektiv relativ permeabilitet;

    Abstract : The introduction of inverters utilizing wide band-gap semiconductors allow for higher switching frequency and improved machine drive energy efficiency. However, inverter switching results in fast voltage surges which cause overvoltage at the stator terminals and uneven voltage distribution in the stator winding. READ MORE

  5. 5. Characterization of combinatorial Cu2ZnSnS4 thin films

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Joakim Adolfsson; [2018]
    Keywords : Photovoltaics; Kesterite; Material science; Raman; Photoluminescence;

    Abstract : The kesterite Cu2ZnSnS4 (CZTS) is considered as a possible absorber layer in future photovoltaic (PV) applications. The abundance of its constituent elements along with the material being non-toxic and having a direct band gap of around 1.5 eV make it an attractive material for solar cell applications. So far, cells with an efficiency of 12. READ MORE