Selaus avainsanan mukaan kokoelmassa "losses"Väitöskirjat

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    • Ferrite Permanent Magnet Hysteresis Loss in Rotating Electrical Machinery 

      Egorov, Dmitry
      Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 15.11.2019)
      Electrical machines with permanent magnets (PMs) find numerous applications in present energy-efficient technologies. A reasonable compromise in terms of costs and efficiency makes electrical machines with ferrite PMs a ...

    • Induction Motor Drive Energy Efficiency - Simulation and Analysis 

      Aarniovuori, Lassi
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 27.08.2010)
      A coupled system simulator, based on analytical circuit equations and a finite element method (FEM) model of the motor has been developed and it is used to analyse a frequency-converterfed industrial squirrel-cage induction ...

    • Losses in low-Reynolds-number centrifugal compressors 

      Tiainen, Jonna
      Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 2018)
      Micro-scale centrifugal compressors and compressors operating at a high altitude suffer from performance deterioration due to low Reynolds numbers. An improvement in the efficiency of a low-Reynolds-number centrifugal ...