Title :
Strand-level finite element model of stator AC copper losses in the high speed machines
Author :
Chen, Wenliang ; Liu, Yujing ; Islam, Jahirul ; Svechkarenko, Dmitry
Author_Institution :
Corp. Res. Center, ABB, Sweden
Abstract :
In high speed machines, the skin and proximity effects cause significant increase of the total copper losses in stator windings at the high frequency. The cause and behavior of the eddy currents are studied at two extreme time moments. The AC copper losses are divided into 3 components with different sources. The dimensions of the conductors must be carefully selected to minimize the stator AC copper losses. The optimal strand thicknesses at 4 different frequencies are investigated. The ratio between AC and DC resistances calculated in finite element (FE) model is compared with the results from the analytical method.
Keywords :
AC machines; conductors (electric); electric resistance; finite element analysis; losses; skin effect; stators; AC copper losses; AC resistances; DC resistances; FE model; eddy currents; high frequency stator windings; high speed machines; optimal strand thicknesses; proximity effects; skin effects; stator AC copper losses; strand-level finite element model; Conductors; Copper; Current density; Eddy currents; Stator windings; Windings; AC copper losses; eddy current; finite element method; form-wound windings; high speed machines; proximity effect;
Conference_Titel :
Electrical Machines (ICEM), 2012 XXth International Conference on
Conference_Location :
Marseille
Print_ISBN :
978-1-4673-0143-5
Electronic_ISBN :
978-1-4673-0141-1
DOI :
10.1109/ICElMach.2012.6349912
