Title :
Influence of Bending Stress on Magnetic Properties of 3-Phase 3-Leg Transformers With Amorphous Cores
Author :
Yeong-Hwa Chang ; Chang-Hung Hsu ; Huei-Lung Chu ; Ching-Pei Tseng
Author_Institution :
Dept. of Electr. Eng., Chang Gung Univ., Taoyuan, Taiwan
Abstract :
This paper mainly explores the influence of bending stresses on the magnetic characteristics of three-phase amorphous transformers. Different types of core structures, including C-shaped and toroidal cores, are considered for a comparison of magnetic properties using VSM, XRD, and SEM. Among all specimens, those taken from the limb plane and the rectangular corner of a C-core have the lowest and highest coercivities, respectively. In addition, the crystalline property of Fe and α -Fe of rectangular cores is stronger than that of toroidal cores. Subsequently, the properties of magnetic loss and magnetic anisotropy are investigated. The experimental results of three-phase amorphous core transformers with a capacity of 100 kVA demonstrate that the toroidal core transformer has better magnetic characteristics in terms of lower core loss and exciting power than conventional C-core transformers.
Keywords :
X-ray diffraction; amorphous state; bending; coercive force; iron; magnetic anisotropy; magnetic leakage; scanning electron microscopy; transformer cores; 3-phase 3-leg transformers; C-shaped cores; Fe; SEM; VSM; XRD; amorphous cores; bending stress; coercivities; core structures; crystalline property; limb plane; magnetic anisotropy; magnetic loss; magnetic properties; toroidal cores; Amorphous magnetic materials; Magnetic hysteresis; Magnetostriction; Toroidal magnetic fields; Transformer cores; Amorphous transformer; bending stress; core structure; magnetic properties;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2156772
