Blar i NTNU Open på forfatter "Papastergiou, Konstantinos"

Viser treff 1-6 av 6

    • A Condition Monitoring Method for Solder Layer Degradation of Liquid-Cooled Power Semiconductors 

      Baumann, Timm Felix; Papastergiou, Konstantinos; Murillo Garcia, Raul; Peftitsis, Dimosthenis (Chapter, 2023)
      This paper presents a new method for condition monitoring of solder layer degradation of liquid-cooled power semiconductors. Solder layer degradation is detected by an increased thermal impedance, which has the effect that ...

    • High precision scalable power converter for accelerator magnets 

      Haugen, Krister Leonart; Papastergiou, Konstantinos; Asimakopoulos, Panagiotis; Peftitsis, Dimosthenis (Peer reviewed; Journal article, 2022)
      The lower conduction power losses and the positive temperature coefficient that favours parallel connections, make Silicon Carbide (SiC) metal oxide semiconductor field-effect transistors (MOSFETs) to be an excellent ...

    • Power Flow Control in a Modular Converter With Energy Storage 

      Haugen, Krister Leonart; Papastergiou, Konstantinos; Peftitsis, Dimosthenis (Peer reviewed; Journal article, 2023)
      Using modularized power converters with scalable energy storage in particle accelerators can be further enhanced with controls that can be adapted to optimise different design targets, such as to minimise the front-end ...

    • A quasi-offline condition monitoring method of DC-link capacitor banks in accelerator power converters 

      Baumann, Timm Felix; Papastergiou, Konstantinos; Raul Murillo, Murillo Garcia; Peftitsis, Dimosthenis (Chapter, 2022)
      This paper proposes a condition monitoring scheme for DC-link electrolytic capacitors used innregenerative medium power converters. The monitoring scheme is based on capacitor bank voltage measurements in quasi-offline ...

    • A Scalable DC/DC Converter Topology with Modularized Energy Storage for High Energy Physics Applications 

      Haugen, Krister Leonart; Papastergiou, Konstantinos; Peftitsis, Dimosthenis (Journal article; Peer reviewed, 2023)
      This article presents the design and control of a high-power modular dc–dc converter for electromagnets used in high energy physics applications. The fundamental building modules, herein called bricks, can either be connected ...

    • Scalable Regenerative Power Converters for Accelerator Magnets 

      Haugen, Krister Leonart (Doctoral theses at NTNU;2023:413, Doctoral thesis, 2023)
      Electromagnets are used at The European Centre for Nuclear Research (CERN) in high-energy physics experiments to direct the charged particle beams. They store significant amounts of energy in the magnetic fields and are ...