TESTING STRATEGIES TO EVALUATE NON-ORIENTED ELECTRICAL STEELS LOSSES
Keywords:Non-oriented electrical steel, iron losses, iron losses measurement, Epstein frame test, ring core test, dynamometer test
This paper presents an experimental comparative study of iron losses obtained by means of the Epstein frame, Ring Core and dynamometer tests with non-oriented electrical steel samples. The comparisons are qualitative and they are intended to show the importance of carrying out other tests to evaluate electrical steels in addition to the standard Epstein frame method. In industry, complex or costly tests are avoided, whenever it is possible. This study shows that the ring core test can be a low cost solution since it is effective. For the manufacturer point of view, comparing different commercial steels at purchase time with a simple process is an advantage.
Iron Losses Evaluations by Different Testing Procedures. In: Electrical Machines (ICEM), 2010 XIX International
Conference on, pp.1-4, 6-8 Sept. 2010.
 Magnetic Materials – Methods of Measurement of the Magnetic Properties of Electrical Steel Sheet and Strip by Means
of an Epstein Frame, IEC Standard 404-2, 1996-03.
 P. Beckley, Electrical Steels for Rotating Machines – (IEE Power and Energy Series, No. 37). Glasgow, Bell & Bain
 E. J. Meurer, J. S. D. Garcia, N. J. Batistela; R. Carlson, N. Sadowski, P. Kuo-Peng, J. P. A. Bastos, Análise e
Comparação de Aparelhos para Medidas de Perdas Magnéticas em Lâminas de Aço ao Silício. In: MOMAG 2004,
2004, São Paulo - S.P. Anais de Congresso - CD Room, 2004. v. 1. p. 1-5, (in Portuguese).
 Torres, A. G., Lyra, R., Cardoso Filho, B. J., Cunha, M.A., Paolinelli, S.C. Determination of the Magnetic Losses in
Induction Motors based on the Generalized Epstein Test. In: 39th IAS Annual Meeting, 2004, Seattle. Conference
record of the 2004 IEEE Industry Application Conference.
 Brockhaus Messtechnik, Electrical Steel Tester MPG [Online]. Available: http://www.brockhaus.net/e-index.html
 Test Methods for Magnetic Steel Sheet and Strip, JIS Standard C2550:2000, 2000-11.
 S.E. Zirka, Y.I. Moroz, P. Marketos, A.J. Moses, D.C. Jiles, T. Matsuo, Generalization of the Classical Method for
Calculating Dynamic Hysteresis Loops in Grain-Oriented Electrical Steels, IEEE Trans. Magnetics, pp. 2113 – 2126,
 P. Marketos, S. Zurek, A. J. Moses, A Method for Defining the Mean Path Length of the Epstein Frame, IEEE Trans.
Magnetics, vol. 43, pp.2755-2757, June 2007.
 R. Carlson, E. J. Meurer, N. J. Batistela, N. Sadowski, L. Von Dokonal, A. A. Espíndola. Interlaminar Losses
Evaluation in Electrical Machines Stators. Presented at XVII International Conference on Electrical Machines – ICEM,
Crete Island, Greece, 2006.
 M. F. de Campos, Fernando J. G. Landgraf, Anisotropy of Steel Sheets and Consequence for Epstein Test: II
Experiment”. XVIII Imeko World Congress, Rio de Janeiro, Brazil, September, 2006.
 S. C. Paolinelli, M. A. da Cunha, A. B. Cota, Effect of hot band grain size on the texture evolution of 2% Si nonoriented still during final annealing, Presented at Soft Magnetic Material 19 – SMM 19, Turin, Italy, Sept. 2009.