Sökning: "Silicon diode"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Silicon diode.

  1. 1. Investigation of switching power losses of SiC MOSFET : used in a DC/DC Buck converter

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

    Författare :André Xavier Svensson; [2022]
    Nyckelord :Switching power losses; Metal Oxide Semiconductor Field Effect Transistor; Silicon carbide; Synchronous Buck converter; Wide Band Gap; Double Pulse Test; Efficiency; Temperature; Växlande effektförluster; Fälteffekttransistor; Kiselkarbid; Synchronous Buck omvandlare; Wide Band Gap; Double Pulse Test; Verkningsgrad; Temperatur;

    Sammanfattning : All DC/DC converter products include power electronic circuits for power conversion.It is important to find an efficient way for power conversion to reduce power losses and reduce the need for cooling and achieve environmentally friendly solutions.The use of semiconductor switches of wide band gap type is a solution to the problem. LÄS MER

  3. 2. Analysis and Performance Evaluation of a Three-phase Three-level Sparse Neutral Point Clamped Converter for Industrial Variable Speed Drives

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

    Författare :Pengpeng Sun; [2022]
    Nyckelord :Sparse Neutral Point Clamped Converter; Industrial Variable Speed Drives; Silicon IGBT; Calorimetric Measurement; Reverse Recovery Energy; Sparse Neutral Point Clamped Converter; Industriella Varvtalsstyrda Motordrifter; Silicon IGBT; Kalorimetrisk Mätning; Energi för Återhämtningsprocess;

    Sammanfattning : This thesis project focuses on the simulation, design, hardware realization, and performance evaluation of a Three-phase Three-level (3-L) Sparse Neutral Point Clamped Converter (SNPCC) for Industrial Variable Speed Drives (VSDs). The basic operating principle of the SNPCC is briefly described based on switching functions. LÄS MER

  4. 3. Study of defects in PV modules : UV fluorescence and Thermographic photography for Photovoltaics (PV) Field Application

    Uppsats för yrkesexamina på avancerad nivå, Mälardalens högskola/Akademin för ekonomi, samhälle och teknik

    Författare :Sophie Nylund; Zahra Barbari; [2019]
    Nyckelord :UV fluorescence; IR thermography; defects in PV modules; delamination; discoloration; hotspots; snail trails; cracks; fault in bypass diode; non-functioning cell in PV;

    Sammanfattning : For a PV plant it is of fundamental importance that the operation of the PV modules is free from faults or at least that the faults can be detected early, to ensure efficient electricity production. Some defects such as cracks can be seen in visible light while microcracks and damage to the silicon material can only be seen through special lighting. LÄS MER

  5. 4. Processing Technology for Si Based Tandem Solar Cells

    Master-uppsats, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Nedim Aydinci; [2014]
    Nyckelord :;

    Sammanfattning : This project focuses on the investigation of Silicon based Tandem solar cell fabricated by using the Hydride Vapor Phase Epitaxy (HVPE). In the state-of-the-art multi-junction solar cell manufacturing epitaxial technologies are used for sub-cell formation, such as MOVPE (Metal Organic Vapour Phase Epitaxy) [1] or MBE (Molecular Beam Epitaxy) [2]. LÄS MER

  7. 5. Diode Response Correction in Large Photon Fields

    Uppsats för yrkesexamina på avancerad nivå, Medicinsk strålningsfysik (tills m KI)

    Författare :Robert Vorbau; [2010]
    Nyckelord :silicon diode; energy dependence; diode response; dosimetry; relative dosimetry; dosimeter; radiotherapy; radiation detector;

    Sammanfattning : The energy dependent response of silicon diodes in photon beams is a known problem. A new approach to solve this problem is by correcting the response, a response model was suggested by Yin et al. (2002, 2004), and later refined by Eklund and Ahnesjö (2009). LÄS MER