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

Tang, Qi, Wang, Zhongdong, Anderson, Philip Ian, 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: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Publisher: Institute of Electrical and Electronics Engineers
ISSN: 0018-9464
Last Modified: 11 Mar 2019 11:54
URI: http://orca.cf.ac.uk/id/eprint/74250

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