A Specific Magnetic Losses Calculation in Non Oriented Electrical Steel Laminations

(*) Corresponding author

Authors' affiliations

DOI's assignment:
the author of the article can submit here a request for assignment of a DOI number to this resource!
Cost of the service: euros 10,00 (for a DOI)


The paper intends to study the magnetic losses of non-oriented electrical steel laminations under sinusoidal voltage supply. The measurement of magnetic losses of electrical steel laminations in Epstein Frame is implemented step by step at frequency range from 50 Hz. The calculation of the magnetic losses is made by using two methods based on the statistical loss model.  Our contribution consists on the first model which corresponds to the curve fitting method which needs many experimental data but allows a better exactitude. The second method is defined in a time domain, in order to account of the presence of harmonics in the flux density wave form. The coefficients of the second method are determined from the curve fitting. A good agreement between practice and theory was established with these two methods
Copyright © 2013 Praise Worthy Prize - All rights reserved.


Non-Oriented Steel Laminations SiFe; Epstein Frame; Losses Modeling; Losses Components

Full Text:



P. Rovolis, Antonios Kladas, J. Tegopoulos, Laminated iron core losses evaluation and measurements, Journal of Materials Processing Technology 181, 2000, pp. 181-185.

T. L. Mthombeni, P. Pillay, and R. M. W. Strnat, New epstein frame for lamination core loss measurements under high frequencies and high flux densities, IEEE Transactions on energy conversion, vol.. 22, n. 3, September 2007, pp. 614-620.

L. T. Mthombeni, P. Pillay, Core losses in motor laminations exposed to high-frequency or non sinusoidal excitation, IEEE Transactions on Industry Applications, vol. 40, n. 5, September/October 2004, pp. 1325-1332.

M. Ibrahim, P. Pillay, Advanced testing and modeling of magnetic materials including a new method of core loss separation for electrical machines, IEEE Transactions on Industry Applications, vol. 48, n. 5, September/October 2012, pp. 1507-1515.

Y. Chen, and P. Pillay, An improved formula for lamination core loss calculations in machines operating with high frequency and high flux density excitation, Conference Record of the Industry Applications, 37th IAS Annual Meeting,13-18 october 2002, Pittsburgh, PA, USA, vol. 2, 2002, pp. 759-766.

G. Bertotti, F. Fiorillo and G. P. Soardo, The prediction of power losses in soft magnetic materials, Journal de physique, Colloque C8, Supplément au n° 12, Tome 49, décembre 1988, pp. 1915-1919.

G. Bertotti, General properties of power losses in soft ferromagnetic materials, IEEE Transactions on Magnetics, vol. 24, n. 1, January 1988, pp. 621-630.

R. Liu, C. C. Mi, and D. W. Gao, Modeling of eddy-current loss of electrical machines and transformers operated by pulsewidth-modulated inverters, IEEE Transactions on Magnetics, vol. 44, n. 8, , August 2008, pp. 2021-2028

A. Boglietti, A. Cavagnino, Iron loss prediction with PWM supply: an Overview of proposed methods from an engineering application point of view, Industry Applications Conference Forty-Second IAS Annual Meeting, 23-27 September 2007, New Orleans, Louiziana, USA, 2007, pp. 81-88.

M-D. Calin, C. Lungoci, E. Helerea, A Procedure for specific magnetic losses calculation in FeSi electrical sheets, Annals of the university of Craiova, Electrical engineering series, n. 34, ISSN 1842-4805, 2010.

D. Vulkadinovic, M. Smajo, Analysis of magnetic saturation in induction motor drives, (2008) International Review of Electrical Engineering (IREE), 3 (2), pp. 326-336.

N. Fabadi, T. Abbasian, Salmasi, F. Rajaei, A Flux Observer with Online Estimation of Core Loss and Rotor Resistances for Induction Motors, (2009) International Review of Electrical Engineering (IREE), 4 (5), pp. 816-824.

E. E. El-kholy, A. Alwadie, Hossam Youssef, A. A. Abouelfadl, Efficiency Optimized Indirect Field Oriented Control of Induction Motor Impacting Iron Loss, (2012) International Review of Electrical Engineering (IREE), 7 (3), pp. 4419-4427.


  • There are currently no refbacks.

Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2023 Praise Worthy Prize