Sökning: "bipolar switching"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden bipolar switching.

  1. 1. AC Gate Bias Stress of 4H-SiC MOSFETs : An investigation into threshold voltage instability of SiC Power MOSFETs under the influence of bipolar gate stress

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

    Författare :Agnimitra Saha; [2023]
    Nyckelord :Silicon Carbide; Gate Bias Stress; Threshold Voltage; On-state Resistance; Temperature; kiselkarbid; gate spännings-stress; tröskelspänning; on-resistansen; temperatur;

    Sammanfattning : Silicon Carbide, a wide band gap (WBG) semiconductor, has pushed electrical limits beyond Silicon (Si) when it comes to power electronics. It has offered the electrification of society showing promise for a greener future. LÄS MER

  3. 2. A Novel Two-Level Inverter Design for Efficient Energy Conversion in a Maglev Train Rail

    Kandidat-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Oskar Zetterström; Stefan West Westholm; [2023]
    Nyckelord :IGBT; Inverter; Gate-driver; Prototype; Pulse width modulation; Sine wave; Maglev train; IGBT; Växelriktare; Grinddrivenhet; Prototyp; Pulsbreddsmodulering; Sinusvåg; Maglevtåg;

    Sammanfattning : This report covers the construction of a prototype inverter system designed to power the rail of a maglev train, from component selection through simulations and power demands to mounting and wiring the components into a cabinet. The inverter is made with insulated gate bipolar transistors controlled with pulse-width modulated signals provided by a custom microcontroller. LÄS MER

  4. 3. Implementation of Nodes in HVDC Grids

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

    Författare :Johanna Olsson; [2020]
    Nyckelord :HVDC transmission; inverter; pulse width mod-ulation inverters; pulse width modulation; power quality; har-monics; bipolar switching; unipolar switching; total harmonicdistortion;

    Sammanfattning : This project is made for a deeper understanding ofhow frequency and amplitude of the waves that create the controlwave in a Pulse Width Modulated 2-level inverter affect the powerquality and power losses. The results were that a high frequencyreduces the Total Harmonic Distortion but increases the powerloss. LÄS MER

  5. 4. Maximum Inverter AC Current Prediction Based on Junction Temperature Calculation

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

    Författare :Shuyu Ou; [2019]
    Nyckelord :IGBT; Inverter; Junction temperature; Current Limiter; IGBT; Växelriktare; Övergångstemperatur; Strömbegränsare;

    Sammanfattning : Semiconductor devices are widely used in the automotive industry, and they are key components of the inverter and the converter in an electric vehicle. Thus, the concern of protecting the inverter and the converter from damaging operation has been raised. The junction temperature is one of the main considerations. LÄS MER

  7. 5. Kiselkarbidtransistorer i växelriktare för solceller

    Uppsats för yrkesexamina på grundnivå, KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Författare :Adam Shafai; Wei Zhao; [2014]
    Nyckelord :Silicon carbide; Bipolar junction transistor; PV Inverter; Solar cells.; Kiselkarbid; Bipolär transistor; Växelriktare; Solceller.;

    Sammanfattning : Since the first commercial silicon carbide (SiC) transistor was released, the interest in SiC has grown exponentially [1]. The wide energy band gap, high critical electric field and thermal conductivity of silicon carbide allow it to withstand higher voltage/current gains than conventional semiconductor materials [2]. LÄS MER