A Novel Octagonal Wound Core for Distribution Transformers Validated by Electromagnetic Field Analysis and Comparison With Conventional Wound Core

Author

Hernández, Iván ; Olivares-Galván, Juan C. ; Georgilakis, Pavlos S. ; Cañedo, José M.

Author_Institution

Dept. of Electr. & Comput. Eng., Power Electr. Syst. Polytech. Inst. of NYU, Brooklyn, NY, USA

Volume

46

Issue

5

fYear

2010

fDate

5/1/2010 12:00:00 AM

Firstpage

1251

Lastpage

1258

Abstract

This paper analyzes a novel configuration of transformer core, called octagonal wound core (OWC), and shows the minimization of the excitation current and the reduction of the eddy-current losses. The OWC is compared with the conventional wound core (CWC) configuration. The comparison is based on two-dimensional and three-dimensional finite-element method (FEM) simulations, taking into account the nonlinear properties of the magnetic material of the core. The results show that the OWC reduces the excitation current and the eddy-current losses when compared with CWC. Moreover, several combinations of grades of the grain-oriented silicon steel (GOSS) were investigated so as to further reduce the eddy-current losses and the excitation current.

Keywords

eddy current losses; finite element analysis; transformer cores; distribution transformers; eddy-current losses reduction; electromagnetic field analysis; excitation current minimization; grain-oriented silicon steel; magnetic material; octagonal wound core; three-dimensional finite-element method simulation; transformer core; two-dimensional finite-element method; Eddy currents; electromagnetic field; finite-element methods; laminations; octagonal wound cores; rolling direction; transformer core; wound core;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2040623

Filename

5427073