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Modeling of core loss for non-oriented electrical steel.

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Title: Modeling of core loss for non-oriented electrical steel.
Authors: Dems, Maria1 (AUTHOR) mdems@p.lodz.pl, Komeza, Krzysztof1 (AUTHOR) krzysztof.komeza@p.lodz.pl, Szulakowski, Jacek1 (AUTHOR) szulakowski.jacek@p.lodz.pl, Kubiak, Witold1 (AUTHOR) witold.kubiak@p.lodz.pl
Source: COMPEL. 2019, Vol. 38 Issue 6, p1874-1884. 11p.
Subjects: Electrical steel, Magnetic flux density, Actinic flux
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. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
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. [ABSTRACT FROM AUTHOR]
ISSN:03321649
DOI:10.1108/COMPEL-09-2018-0339