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A System Model for the Effect of Self-Balancing in Multiactive Bridge Converters

Grimm, Ferdinand LU orcid ; Kolahian, Pouya ; Bucknall, Richard and Baghdadi, Mehdi (2025) In IEEE Transactions on Power Electronics 40(12). p.17988-17997
Abstract

This article analyzes the effects of self-balancing in multiactive bridge converters. Therefore, it proposes a time-domain approach to model the dynamics of multiwinding transformer-based multilevel dc/dc converter, including self-balancing. In previous research, multiwinding 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 article, a dc/dc converter model that includes the transformer as M-port network with magnetization and stray inductance and conduction losses... (More)

This article analyzes the effects of self-balancing in multiactive bridge converters. Therefore, it proposes a time-domain approach to model the dynamics of multiwinding transformer-based multilevel dc/dc converter, including self-balancing. In previous research, multiwinding 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 article, a dc/dc converter model that includes the transformer as 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.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cell balancing, charge balancing, circuit modeling, circuit simulation, multiport converters
in
IEEE Transactions on Power Electronics
volume
40
issue
12
pages
10 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:105013150565
ISSN
0885-8993
DOI
10.1109/TPEL.2025.3597231
language
English
LU publication?
yes
id
7aa511d3-1338-497b-8e1c-f3076917f846
date added to LUP
2026-01-09 08:54:46
date last changed
2026-01-09 08:55:27
@article{7aa511d3-1338-497b-8e1c-f3076917f846,
  abstract     = {{<p>This article analyzes the effects of self-balancing in multiactive bridge converters. Therefore, it proposes a time-domain approach to model the dynamics of multiwinding transformer-based multilevel dc/dc converter, including self-balancing. In previous research, multiwinding 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 article, a dc/dc converter model that includes the transformer as 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.</p>}},
  author       = {{Grimm, Ferdinand and Kolahian, Pouya and Bucknall, Richard and Baghdadi, Mehdi}},
  issn         = {{0885-8993}},
  keywords     = {{Cell balancing; charge balancing; circuit modeling; circuit simulation; multiport converters}},
  language     = {{eng}},
  number       = {{12}},
  pages        = {{17988--17997}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Power Electronics}},
  title        = {{A System Model for the Effect of Self-Balancing in Multiactive Bridge Converters}},
  url          = {{http://dx.doi.org/10.1109/TPEL.2025.3597231}},
  doi          = {{10.1109/TPEL.2025.3597231}},
  volume       = {{40}},
  year         = {{2025}},
}