High-frequency modeling of a current transformer by finite-element simulation

This paper depicts a method to elaborate a high-frequency (100 kHz to 50 MHz) model of a current transformer. The method uses finite-element analysis to determine the values of the parameters of the circuit model; all electrostatic and magnetic couplings are taken into account and calculated. The pa...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-03, Vol.39 (2), p.998-1007
Main Authors: Poulichet, P., Costa, F., Laboure, E.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit simulation
Circuits
Computer simulation
Coupling circuits
Couplings
Current transformers
Electric power
Electrical engineering. Electrical power engineering
Electrostatic analysis
Engineering Sciences
Exact sciences and technology
Finite element method
Finite element methods
Flux
Magnetic analysis
Magnetic circuits
Magnetic flux leakage
Magnetic shielding
Magnetism
Mathematical analysis
Mathematical models
Parasitic capacitance
Transformers
Transformers and inductors
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Summary:This paper depicts a method to elaborate a high-frequency (100 kHz to 50 MHz) model of a current transformer. The method uses finite-element analysis to determine the values of the parameters of the circuit model; all electrostatic and magnetic couplings are taken into account and calculated. The paper shows how parasitic capacitance and flux leakage alter the transformer frequency response. These effects are deeply modified by the primary conductor position, by an air gap in the core, and by the presence of a shielding case around the transformer. The paper compares simulation results with experimental ones to show the accuracy of the models.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.808603