Specific Total Loss Components Under Axial Magnetization in Electrical Steel Sheets With Different Degree of Goss Texture

Electrical steel sheets (ESS) play an important role in the magnetic circuit core design of electrical machines. One of the most obvious parameters of these machines is their efficiency which depends mainly on total core loss. Hence, it depends on the ESS quality which is graded according to specific total loss (P_S). Several years ago P_S was measured at peak magnetic flux density equal to 1.0 T, later at 1.5 T, and presently the value of 1.7 T is used for classification. This increase from 1.0 to 1.7 T results from both material and instrumentation improvements. According to present knowledge, the P_S of ESS consists of three components: a hysteresis loss component and both classical and additional eddy current loss components. It was found that all three components are dependent on anisotropy, i.e. the degree of Goss texture. These dependencies, however, show different trends as the magnetic flux density increases. The aim of this paper is to make a contribution to a better understanding of specific total loss in ESS with different degrees of Goss texture.