Modeling of core loss for non-oriented electrical steel
ISSN: 0332-1649
Article publication date: 15 November 2018
Issue publication date: 15 November 2019
Abstract
Purpose
The purpose of this paper is to present the application of the loss approximation method for non-oriented electrical steel developed by the authors. A new model of a toroidal sample with dimensions ensuring high uniformity of the field was presented.
Design/methodology/approach
A critical analysis of the methods used was carried out. Based on these considerations, the authors proposed their own loss approximation method, which allows obtaining high accuracy in a wide range of induction and frequency. The proposed method is based on the assumption that for a certain frequency range losses can be describe by two terms formula. For a fixed value of the peak flux density Bm, the graph of specific loss divided by the frequency should have the form of a straight line. Then, the obtained coefficients for different Bm are the basis for approximation with the power function.
Findings
The comparison of measurement and approximation results shows that the method allows to obtain very good accuracy in a wide range of induction and frequency.
Research limitations/implications
More detailed studies on the impact of cutting on a larger number of samples with different geometrical dimensions are needed.
Practical implications
Application of the new method provides a better approximation of the curve of the loss and thus a more accurate calculation of the core loss in the electrical machines.
Originality/value
The paper presents the application of the loss approximation method for non-oriented electrical steel developed by the authors. A new model of a toroidal sample with dimensions ensuring high uniformity of the field was presented. It is shown that the approximation introduced allows for high accuracy in a wide range of frequency and magnetic flux density.
Keywords
Acknowledgements
The work is carried out within the framework of the research project POIR.04.01.04-00-0002/16. Developing a new optimized from the point of view of power loss design high speed three phase induction motors used in industrial drives, financed by NCBiR within the Operational Program Intelligent Development 2014-2020.
Citation
Dems, M., Komeza, K., Szulakowski, J. and Kubiak, W. (2019), "Modeling of core loss for non-oriented electrical steel", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 38 No. 6, pp. 1874-1884. https://doi.org/10.1108/COMPEL-09-2018-0339
Publisher
:Emerald Publishing Limited
Copyright © 2018, Emerald Publishing Limited