Sökning: "Snubber"

Visar resultat 1 - 5 av 8 uppsatser innehållade ordet Snubber.

1. 1. Design and Evaluation of Heavy Electric Vehicle DC Charging Overcurrent Protection

   Master-uppsats, Högskolan Väst/Institutionen för ingenjörsvetenskap

   Författare :Daniel Buvarp; [2022]
   Nyckelord :DC charging; overcurrent protection; circuit breaker; simulation; semiconductor;

   Sammanfattning : The vehicle industry must reduce emissions to lessen their environmental impact. Using electric motors for propulsion and batteries for energy storage decreases the pollution and greenhouse gases emitted by heavy commercial vehicles such as trucks and buses. LÄS MER

3. 2. Elimination of Harmonic Disturbances in Softstarters

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Raheleh Mahdivand Avilagh; [2021]
   Nyckelord :Technology and Engineering;

   Sammanfattning : Power system infrastructure has been facing many challenges when it comes to harmonics distortion, and power electronic devices are no exception considering their wide usage in the system. In this thesis the focus is on the impact of these system harmonics on the electrical motors which are vastly used in industry for different applications. LÄS MER

4. 3. Stepdown-omvandlare med låg tomgångsförlust

   Kandidat-uppsats, Linköpings universitet/Elektroniska Kretsar och System

   Författare :David Smedberg; [2020]
   Nyckelord :;

   Sammanfattning : A power supply unit with very low standby losses has been constructed. A reference design from Texas Instrument was used as a comparison and starting point. A choice between optimizing the existing reference design or creating a new power supply was made. The losses in the reference design was located to be due to high switching frequency. LÄS MER

5. 4. Investigation of Trench Gate IGBTs in MMC based VSC for HVDC

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

   Författare :Kruphalan Tamil Selva; [2018]
   Nyckelord :Trench-IGBT; VSC; HVDC; IGBT Driving Methods; Trench-IGBT; VSC; HVDC; IGBT drivningsmekanismer;

   Sammanfattning : The following is a thesis project involving investigation of applicability of trench type IGBTs in present and future VSC based HVDC convertors. The work involves three major sections – theoretical loss evaluation of adoption of Trench technology (both IGBT and BIGT) for HVDC Light® applications, testing the Trench IGBT prototype with existing gate units and finalizing with a hypothesis and a practical solution for unexplained turn-on phenomenon observed during testing. LÄS MER

7. 5. Design of Resonant Converters using Silicon Carbide Power

   Master-uppsats, KTH/Skolan för elektro- och systemteknik (EES)

   Författare :Rahul Moozhikkal; [2016]
   Nyckelord :Silicon carbide; SiC; resonant converters; discrete power transistors; snubber stray inductances; switch stray inductances; PCB design;

   Sammanfattning : The design of series-loaded resonant converters using the state of the art SiC power transistorsis investigated in the thesis. SiC devices are chosen as they offer lower switching losses comparedto conventional Si based devices A very detailed study about the working and differentmodes of operation of the resonant converter is carried out. LÄS MER