Experimental Method for Characterizing Electrical Steel Sheets in the Normal Direction

• Main Authors: Thierry Belgrand, Stephane Duchesne, Ewa Napieralska, Nabil Hihat, Jean Philippe Lecointe
• Format: Article
• Language: English
• Published: MDPI AG 2010-10-01
• Series: Sensors
• Subjects: magnetic measurement; permeability; electrical steel sheet; magnetic anisotropy
• Online Access: http://www.mdpi.com/1424-8220/10/10/9053/

This paper proposes an experimental method to characterise magnetic laminations in the direction normal to the sheet plane. The principle, which is based on a static excitation to avoid planar eddy currents, is explained and specific test benches are proposed. Measurements of the flux density are made with a sensor moving in and out of an air-gap. A simple analytical model is derived in order to determine the permeability in the normal direction. The experimental results for grain oriented steel sheets are presented and a comparison is provided with values obtained from literature.