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Numerical modelling of magnetic characteristics of ferrite core taking account of both eddy current and displacement current

Authors :
Mohendro Kumar Ghosh
Yanhui Gao
Hiroshi Dozono
Kazuhiro Muramatsu
Weimin Guan
Jiaxin Yuan
Cuihua Tian
Baichao Chen
Source :
Heliyon, Vol 5, Iss 8, Pp e02229- (2019)
Publication Year :
2019
Publisher :
Elsevier, 2019.

Abstract

In the magnetic field analysis of magnetic devices using a ferrite core, such as a pulse transformer, the frequency-domain analysis is often carried out using the measured complex permeability under different frequency range. However, the nonlinear magnetic characteristics cannot be considered in the frequency-domain analysis because of the harmonics caused by it cannot be represented. The nonlinear magnetic characteristics can be considered in the time-domain analysis, but suitable constant conductivity and permittivity taking account of the microstructure of ferrite core, which can represent the measured complex permeability under different frequencies, needs to be investigated for the time-domain analysis. In this paper, the effective permeability of a toroidal ferrite core is tried to be demonstrated by using the linear ac steady state magnetic field analysis taking account eddy currents and displacement currents. It is shown that the measured permeability can be realized roughly by using the modified constant conductivity and permittivity. The nonlinear time-domain magnetic field analysis can be carried out using the modified constant conductivity and permittivity obtained from this paper.

Details

Language :
English
ISSN :
24058440
Volume :
5
Issue :
8
Database :
Directory of Open Access Journals
Journal :
Heliyon
Publication Type :
Academic Journal
Accession number :
edsdoj.7e46fe6d16ac416d9e29960d2e90bd88
Document Type :
article
Full Text :
https://doi.org/10.1016/j.heliyon.2019.e02229