Approximation and prediction of AC magnetization curves for power transformer core analysis

Tang, Qi, Wang, Zhongdong, Anderson, Philip Ian ORCID: https://orcid.org/0000-0001-6500-6583, Jarman, Paul and Moses, Anthony John 2015. Approximation and prediction of AC magnetization curves for power transformer core analysis. IEEE Transactions on Magnetics 51 (5) 10.1109/TMAG.2014.2372672

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Abstract

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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	0018-9464
Last Modified:	28 Oct 2022 09:21
URI:	https://orca.cardiff.ac.uk/id/eprint/74250

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