Title :
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
fDate :
5/1/2010 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2040623