FEA Based Transformer Loss Analysis for Dual Active Bridge DC-DC Converter Using Triple Phase Shift Modulation

High-frequency transformers are a key component of dual active bridge (DAB) dc-dc converters, providing isolation and voltage scaling. The losses in the transformer should be minimized to improve efficiency and extend lifetime. The existing research focuses on the optimization of design parameters,...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in power electronics 2022-08, Vol.10 (4), p.4347-4360
Main Authors: Akbar, Seema Mir, Hasan, Ammar, Watson, Alan J., Wheeler, Pat
Format: Article
Language:English
Subjects:
DC-DC power converters
Design optimization
Design parameters
Dual active bridge (DAB) dc–dc converter
Electric bridges
Electric converters
Finite element analysis
finite element analysis (FEA)
Finite element method
Harmonics
Modulation
Phase modulation
Phase shift
Power transformer insulation
Switches
Transformers
triple phase shift (TPS)
Voltage converters (DC to DC)
winding loss
Windings
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Summary:High-frequency transformers are a key component of dual active bridge (DAB) dc-dc converters, providing isolation and voltage scaling. The losses in the transformer should be minimized to improve efficiency and extend lifetime. The existing research focuses on the optimization of design parameters, such as core material, cross-sectional area and winding configuration to minimize losses. However, the transformer losses also depend on the harmonic content of the current as well as the design parameters and thus the efficiency can be further improved by selecting a modulation scheme which results in minimum current harmonics. This article evaluates the effect of modulation schemes on the transformer losses of a DAB converter operating under triple phase shift (TPS) modulation using finite element analysis. A comparison of losses under different modes of TPS modulation has been provided and it is proven that losses can be significantly reduced by selecting optimal modulation schemes. The experimental results performed on a 1-kW DAB converter laboratory prototype are provided to validate the proposed work. Moreover, a generalized framework has been proposed to analyze and optimize transformer losses for isolated converters.
ISSN:2168-6777
2168-6785
DOI:10.1109/JESTPE.2022.3148355