Analysis of Various Transformer Structures for High Frequency Isolation Applications
High frequency transformers are an integral part of power electronics devices and their parasitic parameters influence the performance and efficiency of the overall system. In this paper, transformer leakage inductances and parasitic capacitances are analyzed using finite element method (FEM) for different structures and windings arrangements of high frequency transformers. Also, magnetic field, electric field, and voltage distribution within the transformer is simulated and analyzed. Six different high frequency transformers with toroidal, EE, and UU cores with different windings are investigated for a 400(V)/400(V), 8 kVA transformer operating at 10 kHz. Additionally, interleaved windings for EE core are simulated and results compared with previous outcomes. Analysis results will help categorize each structure, based on its balance between leakage inductances and series parasitic capacitance. This information can later be used for optimal selection of transformers as a function of their operating frequency and enable 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 Various Transformer Structures for High Frequency Isolation Applications," 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/NAPS46351.2019.9000392
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
High Frequency Transformers; Leakage Inductance; Magnetic and Electric Field Distribution; Parasitic Capacitance; Winding Arrangements
International Standard Book Number (ISBN)
Article - Conference proceedings
© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
01 Oct 2019