Grain-Oriented Steel Rings for an Experimental Comparison of Relative Magnetostriction and Maxwell's Forces Effects

Remi Penin (1) , Jean-Philippe Lecointe (1) , Guillaume Parent (1) , Jean-Francois Brudny (1) , Thierry Belgrand

1 LSEE - Laboratoire Systèmes Electrotechniques et Environnement

The magnetic material quality of transformer cores influences their emitted acoustic noise. The latter is generated by vibrations resulting from the effects of Maxwell's forces, located in the corners, and the magnetostriction inside the magnetic steel. In this paper, two annular structures allow differentiating these two phenomena and analyzing the vibration origins. Then, two different materials are compared, leading to conclusions about the influence of the material anisotropy on vibrations. At last, the measured vibration components are fully justified with the local saturation effects.

Keywords: Displacement measurement; Magnetic anisotropy; magnetic flux density; magnetic forces; magnetostriction; soft magnetic materials; transformer cores; vibrations

Domains: Engineering Sciences [physics]; Electromagnetism

Remi Penin, Jean-Philippe Lecointe, Guillaume Parent, Jean-Francois Brudny, Thierry Belgrand. Grain-Oriented Steel Rings for an Experimental Comparison of Relative Magnetostriction and Maxwell's Forces Effects. IEEE Transactions on Industrial Electronics, 2014, 61 (8), pp.4374-4382. ⟨10.1109/TIE.2013.2276772⟩. ⟨hal-03350810⟩