Analysis of Skin Effect in High Frequency Isolation Transformers
In this paper, a high frequency transformer with different conductors and winding arrangements, at presence of eddy currents and skin effect, is studied. By using different winding structures, and conductor types, such as circular, square shaped, and foil wires, the skin effect in the windings is studied and current density within the conductors at a high frequency of 20 MHz and a lower frequency of 20 kHz are investigated using finite element method (FEM) simulation. Moreover, magnetic field distribution in the transformers at 20 MHz is obtained and displayed. Also, magnetizing inductance, leakage inductance and AC winding resistance for all of the transformer types are found and compared, and frequency response for the transformers are obtained and shown. Lastly, based on the results, the skin effect increases the AC winding resistance and decreases the leakage inductance as the frequency increases. Furthermore, different winding arrangements, conductors, and transformer types show a wide range of parasitic and loss behavior, which enable the designers to compromise between various parameters in different applications, especially new fast switches such as SiC and GaN.
M. S. Nia et al., "Analysis of Skin Effect in High Frequency Isolation Transformers," Proceedings of the 51st North American Power Symposium (2019, Wichita, KS), Institute of Electrical and Electronics Engineers (IEEE), Oct 2019.
The definitive version is available at https://doi.org/10.1109/NAPS46351.2019.9000395
51st North American Power Symposium, NAPS 2019 (2019: Oct. 13-15, Wichita, KS)
Electrical and Computer Engineering
Center for Research in Energy and Environment (CREE)
Keywords and Phrases
Eddy Current and Skin Effect; High Frequency Transformer; Leakage Inductance; Magnetic Field; Winding AC Resistance
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 Oct 2019