Magnetizing currents of transformers operating with submagnetizing of DC

Issue title: Special Issue on the 18th International Symposium on Electromagnetic Fields in Mechatronics, Electrical and Electronic Engineering

Guest editors: Sławomir Wiak, Paolo Di Barba and Krzysztof Komeza

Article type: Research Article

Authors: Majer, Krzysztof

Affiliations: Institute of Mechatronics and Information Systems, Lodz University of Technology, Stefanowskiego 18/22, 90-924 Lodz, Poland | Tel.: +48 42 631 25 71, 631 25 81; E-mail: krzysztof.majer@p.lodz.pl

Abstract: This paper presents a method for specifying the magnetizing current of the transformers operating with different submagnetizing of DC flux and for different values of supply voltage (flux density in the core). The theoretical method of calculating of magnetizing currents has been developed. The computation and corresponding measurements were performed for single phase and three phase, three and five legs transformer cores. The influence of magnetization characteristics on the shape of instantaneous current value was investigated. The results obtained were used to determine the peak values of flux density in certain parts of the magnetic circuit. This has a significant impact on precisely determine vibroacoustic parameters and losses in particular sections of the magnetic circuit of transformers.

Keywords: Transformers, magnetizing current, flux density, submagnetizing

DOI: 10.3233/JAE-182313

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 57, no. S1, pp. 191-200, 2018