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

Volume

47

Issue

10

fYear

2011

Firstpage

2776

Lastpage

2779

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2156772

Filename

6027660