Analysis and verification of leakage inductance calculation in DAB converters based on high-frequency toroidal transformers under different design scenarios

Haris Ataullah, Taosif Iqbal, Ihsan Ullah Khalil, Al-Sharef Mohammad, Nasim Ullah*, Mohamed Emad Farrag

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

High-frequency transformers are becoming an essential component in the integration of power resources that rely on power electronic converters; their efficiency and performance are influenced by parasitic characteristics in the interface. In this article, the design of a high-frequency toroidal transformer has been explained in detail using the ANSYS Maxwell platform. Various parameters,
such as leakage inductance, magnetic flux density, magnetic field strength and uniform magnetic flux line are analyzed using Finite element analysis. High-frequency transformers using a toroidal core with different winding configurations are examined and all parameters obtained through simulation are validated by an analytical approach. Analysis of each design is based on its leakage inductances, which will aid in the appropriate selection of transformers as a function of their operating frequency. This analysis is expected to guide designers to optimize the high-frequency transformer parameters based on practical applications. The optimized parameters are then applied for a dual active bridge (DAB) converter within MATLAB/Simulink to verify the design
process. A prototype has been built to validate the simulation and design procedure. The results obtained from both simulation and experiments are compared and show great correlation.
Original languageEnglish
Article number6176.
JournalEnergies
Volume15
DOIs
Publication statusPublished - 25 Aug 2022

Keywords

  • toroidal transformer
  • finite element method (FEM)
  • finite element analysis (FEA)
  • ANSYS Maxwell
  • magnetic flux
  • leakage inductance
  • high frequency

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