Analysis of effective resistance and eddy-current losses in multiturn winding of high-frequency magnetic components

This paper develops a numerical model for calculation of eddy-current losses in a multiturn winding of a high-frequency transformer. The model assumes periodic arrangement of conductors, and uses the repeat elementary cell concept. The paper proposes analytical expressions and graphic dependences to...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-01, Vol.39 (1), p.539-548
Main Authors: Podoltsev, A.D., Kucheryavaya, I.N., Lebedev, B.B.
Format: Article
Language:English
Subjects:
Analytical models
Applied sciences
Conducting materials
Conductors
Eddy current testing
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Exact solutions
Frequency
Graphics
Inductors and coils
wiring
Magnetic analysis
Magnetic permeability
Magnetism
Mathematical analysis
Mathematical models
Permeability
Proximity effect
Solids
Transformers
Winding
Wire
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Summary:This paper develops a numerical model for calculation of eddy-current losses in a multiturn winding of a high-frequency transformer. The model assumes periodic arrangement of conductors, and uses the repeat elementary cell concept. The paper proposes analytical expressions and graphic dependences to determine effective frequency-dependent resistance of the winding. It computes the leakage field in the transformer window, taking into consideration the effective magnetic permeability of the multiturn winding as a heterogeneous medium. Finally, it analyzes the values of the resistance at various frequencies for two types of winding (solid conductor winding and Litz wire winding) by numerical and experimental methods.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2002.806337