TY - JOUR
T1 - Approximation and Prediction of AC Magnetization Curves for Power Transformer Core Analysis
AU - Tang, Q.
AU - Wang, Z.D.
AU - Anderson, P.I.
AU - Jarman, P.
AU - Moses, A.J.
PY - 2014/11/20
Y1 - 2014/11/20
N2 - Based on the latest experimental results of two different modern graded grain-oriented electrical steels measured up to 2 T under ac, the existing 10 popular analytical approximation functions for ac magnetization curves are critically evaluated. None of them are capable of making a satisfactory approximation over the full useful range (0-2 T). Therefore, a new simple explicit empirical function is proposed that is simple to use (six parameters) and sufficiently accurate (adjusted R2 ≥ 0.9992) to represent the ac magnetization curve. The empirical function is also shown to be suitable (adjusted R2 ≥ 0.9913) for extrapolating the ac magnetization curve into the high-flux-density region (1.80-2 T) when only using the available experimental data in the region 0-1.80 T from steel manufacturers.
AB - Based on the latest experimental results of two different modern graded grain-oriented electrical steels measured up to 2 T under ac, the existing 10 popular analytical approximation functions for ac magnetization curves are critically evaluated. None of them are capable of making a satisfactory approximation over the full useful range (0-2 T). Therefore, a new simple explicit empirical function is proposed that is simple to use (six parameters) and sufficiently accurate (adjusted R2 ≥ 0.9992) to represent the ac magnetization curve. The empirical function is also shown to be suitable (adjusted R2 ≥ 0.9913) for extrapolating the ac magnetization curve into the high-flux-density region (1.80-2 T) when only using the available experimental data in the region 0-1.80 T from steel manufacturers.
U2 - 10.1109/TMAG.2014.2372672
DO - 10.1109/TMAG.2014.2372672
M3 - Article
SN - 0018-9464
VL - 51
JO - I E E E Transactions on Magnetics
JF - I E E E Transactions on Magnetics
IS - 5
M1 - 8400708
ER -