Blar i NTNU Open på forfatter "Chen, Anyuan"
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Analytical and FEM Calculation of Electrical Parameters of Carbon Steel Pipe in DEH Systems
Chen, Anyuan; Nysveen, Arne; Høyer-Hansen, Martin; Lervik, Jens Kristian (Chapter, 2018)In Direct Electrical Heating (DEH) systems, the pipeline of subsea oil productions conducts a large AC current to generate heat. To further improve the effectiveness of the DEH, higher operating frequency is preferable. ... -
Investigation of Permanent Magnet Machines for Downhole Applications: _ Design, Prototype and Testing of a Flux-Switching Permanent Magnet Machine
Chen, Anyuan (Doctoral Theses at NTNU, 1503-8181; 2011:23, Doctoral thesis, 2011)The current standard electrical downhole machine is the induction machine which is relatively inefficient. Permanent magnet (PM) machines, having higher efficiencies, higher torque densities and smaller volumes, have widely ... -
Prediction of Heating Power in Magnetic Pipe Conducting Large AC Current With High Frequencies Up to 200Hz
Chen, Anyuan; Nysveen, Arne; Lervik, Jens Kristian; Høyer-Hansen, Martin (Chapter, 2018)In direct electrical heating system (DEHs), which is developed for subsea process to safeguard well stream through pipelines to topside process platform or shore, the production pipeline is also acts as an active conductor ... -
Simulation and Experimental Validation of Losses in Permanent-Magnet Synchronous Machines
Nordeide, Ivar Beseth (Master thesis, 2024)Permanent-magnet synkronmaskinen (PMSM) har vokst i popularitet, grunnet dens høye effekttetthet, virkningsgrad, effektfaktor og dens lave behov for kontroll og vedlikehold. Siden de første PMSM-ene kom, har det blitt gjort ... -
Study of frequency dependent loss in magnetic steel by the Jiles-Atherton method
Tangen, Magnus Erlend (Master thesis, 2018)This thesis is a continuation of a specialization project which investigated the possibility of simulating the hysteresis and eddy current losses in carbon steel. The work comprises an investigation of how to efficiently ...