Effect of clamping stress on power loss in POWERCORE strip and Si-Fe transformer cores

Author

Basak, A. ; Moses, A.J. ; Al-Bir, R.

Author_Institution

Sch. of Electr., Electron. & Syst. Eng., Univ. of Wales Coll. of Cardiff, UK

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1999

Lastpage

2001

Abstract

A three-limb, three-phase transformer core having a power rating of 14 kVA was assembled from a 101-mm-wide and 0.14-mm-thick amorphous POWERCORE strip using butt and lap T and corner joints. The effect of stresses due to clamping and bending of the laminations on the losses and magnetizing power of this core was investigated. It was found that the stresses were far more harmful in the core assembled from amorphous material than in a similar core assembled from high-permeability grain-oriented 3% silicon iron

Keywords

bending; eddy current losses; iron alloys; laminations; magnetic leakage; power transformers; silicon alloys; transformer cores; 0.14 mm; 101 mm; 15 kVA; Si-Fe transformer core; amorphous POWERCORE strip; amorphous material; clamping stress effects; grain oriented Si-Fe core; lamination bending; power loss; power rating; three-phase transformer core; Amorphous materials; Assembly; Clamps; Lamination; Magnetic cores; Magnetic losses; Phase transformers; Stress; Strips; Transformer cores;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104597

Filename

104597