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Browsing NTNU Open by Author "Nilsen, Roy"

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    • A 1 kW PFC converter with GaN-transistors and planar magnetics 

      Engetrøen, Ådne Finnes (Master thesis, 2019)
      Auka krafttettleik, kostnadsreduksjon, auka effektivitet og auka driftssikkerheit er fire av dei viktigaste målsetjingane i halvleiarindustrien i dag. Ved bruk av GaN-halvleiarar er fleire av desse målsetjingane innan ...
    • Active Compensation of Unbalanced Load Currents in Grid Connected Voltage Source Converters 

      Tiwari, Raghbendra; Nilsen, Roy (Chapter, 2019)
      For a 2-level 3-phase voltage source converter connected to the grid, it should be capable of supporting the grid with maximum possible active and reactive power during balanced and unbalanced load condition. This paper ...
    • Active Front End Converter Used in Adjustable Speed Hydro 

      Romero Amaya, Jose Armando (Master thesis, 2019)
      A consistent part of the research in the hydropower field in Norway is being done at NTNU. The Faculty of Information Technology and Electrical Engineering is an active player in this research through the Department of ...
    • Active Front End Converter with Virtual Damping and Inertia 

      Roni,Kazi Shoffiuddin; Oladeji, Samuel (Master thesis, 2022)
      Nylig har kraftnettverk utviklet seg fra synkrone maskinbaserte systemer til omformer-kontrollsystemer, med en høy spredning av fornybare energikilder (RES) som vind- og solcellekilder. Dagens RESs-enheter utgjør en betydelig ...
    • Active Front End Converter with Virtual Damping and Inertia 

      Oladeji, Samuel; Roni, Kazi Shoffiuddin (Master thesis, 2022)
      Nylig har kraftnettverk utviklet seg fra synkrone maskinbaserte systemer til omformer-kontrollsystemer, med en høy spredning av fornybare energikilder (RES) som vind- og solcellekilder. Dagens RESs-enheter utgjør en betydelig ...
    • Active NPC Converter for Variable Speed Operation of Pumped Storage Hydropower Plant 

      Tiwari, Raghbendra; Nilsen, Roy; Nysveen, Arne (Chapter, 2020)
      This paper discusses the full size Active Neutral Point Clamped (ANPC) Converter for large scale (100 MW, 13-15 kV) synchronous machine in a pumped storage hydropower application to enable the variable speed operation. ...
    • An investigation on modeling principles and ageing behaviour of the lithium ion battery 

      Pettersen, Fredrik (Master thesis, 2020)
      Denne masteroppgaven omhandler batteriteknologi med fokus på litium-ionbatteriet. Litium-ionbatteriet er den dominerende batteriteknologien på markedet i dag og benyttes i et bredt spekter av applikasjoner, alt fra små ...
    • Analysis of magnetic forces and vibration in a converter-fed synchronous hydrogenerator 

      Valavi, Mostafa; Nysveen, Arne; Nilsen, Roy; Le Besnerais, Jean; Devillers, Emile (Chapter, 2017)
      This paper investigates the influence of converter-fed operation on magnetic forces and radial vibration in a hydrogenerator. Flux density distribution is computed using time-stepping finite element (FE) analysis and used ...
    • Analytical Loss Equations for Three Level Active Neutral Point Clamped Converters 

      Tiwari, Raghbendra; Nilsen, Roy (Chapter, 2020)
      This paper presents the analytical expressions that can be used to calculate conduction and switching losses in each devices of an Active Neutral Point Clamped Converter. These expressions can be used to determine the ...
    • Automotive Drive for a Formula Student Racecar 

      Skeie, Håkon K. (Master thesis, 2019)
      Den knappe mengden tilgjengelige drivsystemer for Formula Student-racerbiler gir mulighet til å øke bilens ytelse med innføring av spesialbyggede, egenutviklede systemer. For 2019-sesongen ønsket Revolve NTNU å implementere ...
    • Co-Simulation of an IPMSM Drive Using Comsol and Simulink 

      Andersson, Kristoffer Stabell (Master thesis, 2021)
      Endelig elementmetoder (FEM) er standardtilnærmingen for å vurdere ytelse og design til elektriske maskiner. Permanent-magnet-synkron-motorer med innfelte magneter (IPMSM) øker i popularitet innen trekkapplikasjoner, romfart ...
    • Comparison between Si MOSFETs and GaN HEMTs with special emphasis on low load problems occuring in the LLC resonant converter 

      Blingsmo, Lyder Rumohr (Master thesis, 2019)
      Det stilles store krav til likerettere brukt til å forsyne datasentere med kraft. Et av kravene er høy virkningsgrad. En av de vanligste topologiene brukt til dette formålet består av en PFC-likeretter, for å få sinusformet ...
    • Control of Linear Induction Motor Drive for Hyperloop Applications 

      Dybvik, Vemund Waterloo (Master thesis, 2021)
      The main objective of this master thesis was to implement a control system that could be used for control of the Linear Induction Motor used by Shift Hyperloop. Rotor flux oriented control was implemented very similarly ...
    • Control of Medium Voltage Multi-phase machines: Implementation of Minimum loss Synchronous Optimal Modulation with Neutral Point Balancing 

      Neupane, Krishna (Master thesis, 2014)
      The total loss of an inverter can be reduced by reducing switching losses and harmonics losses. However, the harmonics increases with the reduction of switching frequency and special technique is required to get the overall ...
    • Control of Six-Phase Machines 

      Hoem, Øivind Michael Molnes (Master thesis, 2010)
      The purpose of the work presented in this report was to continue the study of a six phase dual winding IPMSM with split dc-link conducted in [1]. The setup has been proposed as a means to improve the power ratings of ...
    • Control Strategies for Variable Speed Operation of Pumped Storage Plants with Full-size Converter Fed Synchronous Machines 

      Tiwari, Raghbendra; Nilsen, Roy; Mo, Olve (Chapter, 2021)
      The full-size converter fed synchronous machine (CFSM) for variable speed operation of a pumped storage power plant exhibits multiple advantages over the state-of-the-art Doubly Fed Induction Machine (DFIM) technology. The ...
    • Design and Analysis of Stationary Reference Frame Controllers for Active Front End Converter 

      Holter, Arne Sigurd (Master thesis, 2016)
      An active front end converter along with its associated control system has been the scope of this thesis. Relavant literature has been considered for identifying the operation and possible system implementations of this ...
    • A Design Method of an Embedded Real-Time Simulator for Electric Drives using Low-Cost System-on-Chip Platform 

      Perera, Aravinda; Nilsen, Roy; Haugan, Thomas Sagvold; Ljøkelsøy, Kjell (Chapter, 2021)
      This paper presents a modular and easily reusable Zynq System-on-Chip (SoC) based Embedded Real-Time Simulator (ERTS) aimed for rapid prototyping of electric drives. The power hardware components of the drive including the ...
    • Enhanced Sensorless Control of Electric Drivetrains for Deep-Sea Mining Vehicles: Equipped with Three-Phase and Six-Phase IPMSM 

      Perera, Aravinda (Doctoral theses at NTNU;2023:193, Doctoral thesis, 2023)
      The thesis deals with sensorless control methods for three-phase and six-phase Interior PermanentMagnet SynchronousMachine (IPMSM) drives, targeted for deep-sea mining vehicles (DMVs). Rapid growth in the demand for earth ...
    • Evaluation and Comparison between Multilevel Converters for Variable Speed Operation of Pumped Storage Power Plants with Full-size Converters 

      Tiwari, Raghbendra; Nilsen, Roy; Nysveen, Arne (Chapter, 2021)
      This paper compares the full-size converter topologies for the converter fed synchronous machines which can enable the fixed speed pumped storage power plant to variable speed operation. Three converter topologies: Neutral ...

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