Grimm, F;
Kolahian, P;
Bucknall, R;
Baghdadi, M;
(2025)
A System Model for the Effect of Self-Balancing in Multi-Active Bridge Converters.
IEEE Transactions on Power Electronics
10.1109/TPEL.2025.3597231.
(In press).
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Abstract
This paper analyses the effects of self-balancing in multi-active bridge converters. Therefore, it proposes a time-domain approach to model the dynamics of multi-winding transformer-based multilevel DC/DC converter including self-balancing. In previous research, multi-winding transformers have been modeled using average-based power transfer models. These models, while simple, have no direct intuitive interpretation. Furthermore, they only include power transfer resulting from external phase shift between models, not taking the internal balancing of the shared magnetic core into account. In this paper, a DC/DC converter model that includes the transformer as <FOR VERIFICATION>$M$- port network with magnetization and stray inductance and conduction losses is proposed. The model is verified using experiments showing both accurate predictions of both, circulating currents within each module and load currents affecting multiple modules. Furthermore, the effect of self-balancing is shown and how the model is capable to predict changes in the output voltage due to external loads. The model is also used to analyze the robustness of self-balancing to design parameter uncertainties.
| Type: | Article |
|---|---|
| Title: | A System Model for the Effect of Self-Balancing in Multi-Active Bridge Converters |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TPEL.2025.3597231 |
| Publisher version: | https://doi.org/10.1109/tpel.2025.3597231 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Bridge circuits, Mathematical models, Transformers, Integrated circuit modeling, Topology, Windings, Resistance, Load modeling, Switches, Analytical models |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10212837 |
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