Optimal modulation for a fifth-order dual-active-bridge resonant immittance DC-DC converter

Muhammad Yaqoob, Ka Hong Loo, Yiu Pang Chan, Juri Jatskevich

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


This paper proposes a fifth-order resonant immittance network based dual-active-bridge (DAB) converter and an optimal modulation method that will ensure high-efficiency operation of the converter under wide-range variations in voltage ratio and output power level. The proposed modulation method is based on the concept of total power loss minimization, where a loss model is developed and an optimization algorithm is formulated to compute the optimal set of internal and external phase shift parameters that will lead to the maximum efficiency for a given set of operating parameters including voltage ratio and output power level. It is found that to maintain high-efficiency operation under wide-range variations in voltage ratio and output power level, the DAB converter is required to switch between different operation modes and neither soft-switching operation nor unity-power-factor operation is able to achieve wide-range high efficiency performance when used alone. The importance of reconfigurability of operation mode for achieving wide-range high efficiency performance is clearly illustrated in this paper.

Original languageEnglish
Article number8691472
Pages (from-to)70-82
Number of pages13
JournalIEEE Transactions on Power Electronics
Issue number1
Publication statusPublished - Jan 2020


  • Dual-active-bridge (DAB) converter
  • inductive power transfer (IPT)
  • resonant immittance network
  • soft-switching (SS) operation
  • unity power factor (UPF)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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