A multiwinding modeling method for high frequency transformers and inductors

This paper presents a method to obtain an electric model for transformers and inductors, including both frequency and geometry effects in the windings, which can be linked with existing core models. One-dimensional distributions for magnetic and electric fields are assumed, and from Maxwell's e...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2003-05, Vol.18 (3), p.896-906
Main Authors: Lopera, J.M., Prieto, M.J., Pernia, A.M., Nuno, F.
Format: Article
Language:English
Subjects:
Circuit simulation
Electric fields
Electric power generation
Electronics
Frequency
Geometry
Inductors
Magnetic cores
Magnetic domains
Mathematical models
Maxwell equations
Maxwell's equations
Methods
Simulators
Solid modeling
Transformer cores
Transformers
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Description
Summary:This paper presents a method to obtain an electric model for transformers and inductors, including both frequency and geometry effects in the windings, which can be linked with existing core models. One-dimensional distributions for magnetic and electric fields are assumed, and from Maxwell's equations an equivalent electric circuit is easily obtained. This equivalent circuit has been included in analog simulators (Spice, AnalogWorkBench, Saber ...), and comparisons between measured and simulated results are shown, both in time domain and in AC sweep, which verify the model accuracy. The model described in this paper allows designers to deal with key issues in the design of high-frequency magnetic components (copper losses, leakage inductance, skin and proximity effects) by using analog simulators, which are usually more familiar to them than finite-element analysis tools.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2003.810839