| The Steinmetz law: Theoretical considerations Marcos De Campos1; 1UFF - FEDERAL FLUMINENSE UNIVERSITY, Volta Redonda, Brazil; PAPER: 432/Nanomaterials/Regular (Oral) SCHEDULED: 14:00/Sat. 26 Oct. 2019/Coralino ABSTRACT: According to the Steinmetz hysteresis law, the power losses P vary as function of the induction B with an exponent n, where n typically is 1.6. This results in the formula P= k B^n, where k is a constant. However, the exponent n can be different according to the evaluated material. From theoretical considerations, it is expected an exponent n=2, because the Power losses are given approximately by 4 B H, for the case of square hysteresis. Here, H is the applied field. As B is the product of the permeability times the applied field H, then theoretically is expected P = K B^2. Reasons for n be lower than 2 are discussed. It is presented a model able to explain exponent n lower than 2. A better understanding of the Steinmetz law is useful for improvements of models able to predict the heating of steel laminations used in electric motors. |
