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.
JO - Archives of Electrical Engineering
L1 - http://rhis.czasopisma.pan.pl/Content/84455/PDF/05_paper.pdf
L2 - http://rhis.czasopisma.pan.pl/Content/84455
IS - No 3 - 4 December
EP - 176
KW - magnetic laminations
KW - power losses
KW - PWM voltage
ER -
A1 - Zakrzewski, Kazimierz
PB - Polish Academy of Sciences
VL - vol. 59
JF - Archives of Electrical Engineering
SP - 169
T1 - Overloss coefficient in magnetic laminations during PWM supply voltage
UR - http://rhis.czasopisma.pan.pl/dlibra/docmetadata?id=84455
DOI - 10.2478/s10171-010-0013-0