TY - JOUR
N2 - Accurate prediction of power loss distribution within an electrical device is highly desirable as it allows thermal behavior to be evaluated at the early design stage. Three-dimensional (3-D) and two-dimensional (2-D) finite element analysis (FEA) is applied to calculate dc and ac copper losses in the armature winding at high-frequency sinusoidal currents. The main goal of this paper is showing the end-winding effect on copper losses. Copper losses at high frequency are dominated by the skin and proximity effects. A time-varying current has a tendency to concentrate near the surfaces of conductors, and if the frequency is very high, the current is restricted to a very thin layer near the conductor surface. This phenomenon of nonuniform distribution of time-varying currents in conductors is known as the skin effect. The term proximity effect refers to the influence of alternating current in one conductor on the current distribution in another, nearby conductor. To evaluate the ac copper loss within the analyzed machine a simplified approach is adopted using one segment of stator core. To demonstrate an enhanced copper loss due to ac operation, the dc and ac resistances are calculated. The resistances ratio ac to dc is strongly dependent on frequency, temperature, shape of slot and size of slot opening.
L1 - http://www.czasopisma.pan.pl/Content/84937/PDF/07_paper.pdf
L2 - http://www.czasopisma.pan.pl/Content/84937
PY - 2014
IS - No 2 June
EP - 211-225
KW - end winding
KW - copper loss
KW - iron loss
KW - ac loss
KW - skin effect
KW - proximity effect
A1 - Młot, Adrian
A1 - Korkosz, Mariusz
A1 - Grodzki, Piotr
A1 - Łukaniszyn, Marian
PB - Polish Academy of Sciences
VL - vol. 63
T1 - Analysis of the proximity and skin effects on copper loss in a stator core
DA - 2014
SP - 211-225
UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/84937
DOI - 10.2478/aee-2014-0017
ER -