Iron loss components dependent on mechanical compressive and tensile stress in non-oriented electrical steel

Article type: Research Article

Authors: Karthaus, Jan^a; | Elfgen, Silas^a | Leuning, Nora^a | Hameyer, Kay^a

Affiliations: [a] Institute of Electrical Machines (IEM), RWTH Aachen University, Aachen, Germany

Correspondence: [*] Corresponding author: Jan Karthaus, Institute of Electrical Machines, RWTH Aachen University, Schinkelstr. 4, 52062 Aachen, Germany. E-mail: jan.karthaus@iem.rwth-aachen.de

Abstract: Mechanical stress of diverse origin alters the magnetic properties of the core material of electrical machines during operation and, as a result, the magnetic flux path and particularly iron loss. In this paper, based on mechanical stress-dependent magnetic characterisation of non-oriented electrical steel sheet, the behaviour of the specific iron loss and its components are determined and modelled for compressive and tensile stress using stress-dependent iron loss seperation. An approach is presented to model the hysteresis loss component without dc measurements. Here, the focus is set on high frequencies and magnetic flux densities. As a result, a high sensitivity of the components particularly to mechanical compressive stress can be observed and modelled.

Keywords: Iron loss in electrical machines, parameter seperation, magnetomechanical effect

DOI: 10.3233/JAE-171020

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 59, no. 1, pp. 255-261, 2019