Finite element modeling of saturation and eddy current effects in commercial variable transformers

Author

Khan, S.H. ; Grattan, K.T.V.

Author_Institution

Dept. of Electr. Electron. & Inf. Eng., City Univ., London

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2783

Lastpage

2786

Abstract

This paper presents the methodologies and some of the results of performance modeling of variable transformers. This is done by finite element (FE) modeling and computation of 3D magnetic field distribution in commercial variable transformers used as voltage stabilizers. The results are presented in terms of the effects of core saturation and eddy currents in the top plate on magnetic field distribution in and around the transformer core. It is shown that the magnitude and distribution of this field is affected by operational regimes characterized by brush and tap positions which determine the current distribution in the winding

Keywords

eddy currents; finite element analysis; magnetic fields; power transformers; transformer cores; voltage regulators; 3D magnetic field distribution; computational magnetics; core saturation; current distribution; eddy current; finite element model; top plate; variable transformer; voltage stabilizer; winding; Brushes; Contacts; Eddy currents; Finite element methods; Silicon; Steel; Toroidal magnetic fields; Transformer cores; Voltage control; Wounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951306

Filename

951306