The magnetic properties of the ferromagnetic materials used for HTS transformers at 77 K

Author

Chen, Min ; Yu, Yunjia J. ; Xiao, Liye Y. ; Wang, Qiuliang L. ; Chung, Wooho ; Kim, Keeman ; Baang, Sungkeun

Author_Institution

Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing, China

Volume

13

Issue

2

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

2313

Lastpage

2316

Abstract

The properties of the magnetic materials, such as the amorphous alloys and the grain-oriented silicon steels, are essential to the design of high-temperature superconducting transformers. In this paper the magnetic properties and the loss characteristics of different ferromagnetic materials are measured at liquid nitrogen temperature. It is shown from experimental results that at 77 K the saturation flux density of the amorphous metal is about 0.3 T lower than that of the silicon steel, and the loss of amorphous metal is 4 times less than that of the silicon steel. Since the losses of materials at 77 K are higher than those of at room temperature, it is not economical to immerse the transformer core in liquid nitrogen.

Keywords

ferromagnetic materials; magnetic flux; superconducting transformers; transformer cores; 77 K; HTS transformers; amorphous alloys; ferromagnetic materials; grain-oriented silicon steels; liquid nitrogen temperature; loss characteristics; saturation flux density; transformer core; Amorphous materials; High temperature superconductors; Iron alloys; Magnetic materials; Magnetic properties; Nitrogen; Silicon alloys; Steel; Superconducting materials; Transformers;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2003.813109

Filename

1212084