TY - JOUR
N2 - Author presents an analytical method of calculation of unit power losses in magnetic laminations used in electrical machines and transformers. The idea of this method, based on the solution of Maxwell's equations in the lamination material, was described by the author in the previous work [3], taking into account approximation of constitutive static hysteresis loop by elliptic form of the function B = f(H) depending on magnetic saturation. In the previous formula for new isotropic and anisotropic materials it is needed to introduce so called "anomaly coefficient" deduced from the comparison of measured and calculated value of power losses in arbitrary excitation frequency for assumed induction. The method was tested by comparison with the results of experiments presented in commercial catalogues [1, 2]. Assuming superposition of harmonic power losses it is possible to enlarge this method for the estimation of overloss coefficient in dynamo sheet during axial magnetization with nonsinusoidal flux generated e.g. by PWM voltage supply.
L1 - http://www.czasopisma.pan.pl/Content/84455/PDF/05_paper.pdf
L2 - http://www.czasopisma.pan.pl/Content/84455
PY - 2010
IS - No 3 - 4 December
EP - 176
DO - 10.2478/s10171-010-0013-0
KW - magnetic laminations
KW - power losses
KW - PWM voltage
A1 - Zakrzewski, Kazimierz
PB - Polish Academy of Sciences
VL - vol. 59
DA - 2010
T1 - Overloss coefficient in magnetic laminations during PWM supply voltage
SP - 169
UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/84455
T2 - Archives of Electrical Engineering
ER -