Geometry optimization and characterization of three-phase medium frequency transformer for 10kVA isolated DC-DC converter

Lee, Youngsil; Vakil, Gaurang; Watson, Alan J.; Wheeler, Patrick

Abstract

Three-phase Dual Active Bridge converter is advisable for the High-power DC-DC conversion system.

In the ac link, galvanically isolated transformer operated at a medium frequency range provides stepping up or down of the secondary bridge voltage. This paper provides a magnetic design optimization of the medium frequency transformer for maximizing its efficiency when excited by a non-sinusoidal waveform. In this paper, a mathematical design of a 10kVA non-sinusoidal transformer had been developed and validated using two-dimensional (2D) transient finite element analysis (FEA). The set of selected design variables is defined in order to enhance the power density and efficiency of the targeted transformer and an optimization is carried out. Finally, a 10kVA transformer is prototyped and the results of core losses for nonsinusoidal excitation is confirmed experimentally.

Citation

Lee, Y., Vakil, G., Watson, A. J., & Wheeler, P. (2017). Geometry optimization and characterization of three-phase medium frequency transformer for 10kVA isolated DC-DC converter. In 2017 IEEE Energy Conversion Congress and Exposition (ECCE) (511-518). https://doi.org/10.1109/ECCE.2017.8095826

• Conference Name: IEEE Energy Conversion Congress and Exposition (ECCE) 2017
• Conference Location: Cincinnati, OH, USA
• Start Date: Oct 1, 2017
• End Date: Oct 5, 2017
• Acceptance Date: May 1, 2017
• Online Publication Date: Nov 7, 2017
• Publication Date: 2017
• Deposit Date: Mar 22, 2018
• Publicly Available Date: Mar 22, 2018
• Peer Reviewed: Peer Reviewed
• Pages: 511-518
• Book Title: 2017 IEEE Energy Conversion Congress and Exposition (ECCE)
• ISBN: 978-1-5090-2999-0
• DOI: https://doi.org/10.1109/ECCE.2017.8095826
• Keywords: Transformer; Non-sinusoidal excitation; Optimization; Dual Active Bridge Converter; Transient finite element analysis
• Public URL: https://nottingham-repository.worktribe.com/output/886161
• Publisher URL: http://ieeexplore.ieee.org/document/8095826/
• Related Public URLs: http://www.ieee-ecce.org/2017/
• Additional Information: © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Published in ECCE 2017 : IEEE Energy Conversion Congress and expo. ISBN 9781509029983