Determination of Specific Losses in the Limbs of an Epstein Frame Using a Three Epstein Frame Methodology Applied to Grain Oriented Electrical Steels.
An experimental method to characterize the magnetic properties of Grain Oriented Electrical Steel in the rolling direction is proposed in this paper. It relies on the use of three 25 cm Epstein frames combined to generate three test-frames of different lengths. This enables the identification of the effective specific losses of the electrical steel when magnetization is applied along the rolling direction. As a consequence, it evidences the deviation of the loss figures obtained using the standardised Epstein test. The difference in losses is explained by the fact that the described method gives "only" the losses attached to the straight parts. The concept of the magnetic path length as defined by the standard is discussed.
Laboratoire Syst&#232;mes Electrotechniques et Environnement (LSEE), University of Artois, EA 4025, F-62400 B&#233;thune, France. guillaume.parent@univ-artois.fr.
Guillaume
G
Parent
Laboratoire Syst&#232;mes Electrotechniques et Environnement (LSEE), University of Artois, EA 4025, F-62400 B&#233;thune, France. remi.penin@gmail.com.|Thyssenkrupp Electrical Steel, F-62330 Isbergues, France. remi.penin@gmail.com.
Rémi
R
Penin
Laboratoire Syst&#232;mes Electrotechniques et Environnement (LSEE), University of Artois, EA 4025, F-62400 B&#233;thune, France. jphilippe.lecointe@univ-artois.fr.
Jean-Philippe
JP
Lecointe
Laboratoire Syst&#232;mes Electrotechniques et Environnement (LSEE), University of Artois, EA 4025, F-62400 B&#233;thune, France. jfrancois.brudny@univ-artois.fr.
Jean-François
JF
Brudny
Thyssenkrupp Electrical Steel, F-62330 Isbergues, France. thierry.belgrand@thyssenkrupp.com.
Thierry
T
Belgrand
Epstein frame; electrical steel; grain oriented; specific losses