Macroscopic anisotropy characterization of SiFe using a rotational single sheet tester

Abstract

Macroscopic magnetic anisotropy of two electrical steel samples of GO and NO SiFe materials are characterized thanks to a rotational single sheet tester. This nonstandard set up allows us to perform magnetic measurements under both a rotating excitation field and an alternating one applied along any direction of the sheet plane. The anisotropy of the magnetic losses and of the exciting field of each material quality is discussed. As expected, the GOSS texture of the GO SiFe is well pointed out with its very easy magnetization rolling direction. The hard magnetization axis at 55/spl deg/ emerges as the induction increases and replaces the transverse direction. The NO SiFe shows closely similar magnetic characteristics but remains anisotropic. The vectorial aspect of B(H) law is also highlighted. Such characteristics will be useful in many fields, e.g. material elaboration, magnetic law behaviour modelling and construction of electrical machines.