Design Of Dual Active Bridge Converters For Electric Vehicles — Evaluating Modulation Schemes And Operating Frequencies
by Silpashree Sahu, Abinash Dash, Dipankar De, Harikrishnan A, and Varri Chandra Sekhar Pavan Kumar, IIT Bhubaneswar, Jatni, India and Alberto Castellazzi, Kyoto University of Advanced Sciences, Kyoto, Japan, How2Power Today, Dec 15 2025
Focus:
The dual active bridge (DAB) converter enables bidirectional power conversion between different
voltage levels in hybrid electric vehicle (HEV) and electric vehicle (EV) systems. The control
of this topology can be implemented with different modulation methods—single-phase-shift,
triple-phase-shift and extended-phase-shift control. The choice of modulation method will
affect component selection, converter efficiency and reliability. In this article, the authors
present the results of a study comparing DAB converter losses for the three modulation methods
and at different switching frequencies, with an analysis and simulation of power switch and
magnetics losses. This discussion includes an explanation of how the different modulation
techniques control switching of the DAB’s two H-bridges, detailed design steps for the DAB, and
how to determine its losses. Converter operation and thermal performance are verified
experimentally.
What you’ll learn:
- How to understand operation of the DAB converter under single-phase-shift, triple-phase-shift and extended-phase-shift control
- How to calculate losses of the DAB converter under the three different control methods
- How to design DAB converters
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