Medium Frequency Transformer Leakage Inductance Modeling and Experimental Verification
M. Mogorovic and D. Dujic
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Abstract—This paper provides detailed analytical modeling
and finite elements method (FEM) analysis of the medium
frequency transformer (MFT) leakage inductance, as one of
the key design factors governing the operation of galvanically
isolated power electronics converters. Precise leakage inductance
modeling in design stage is especially important for converter
topologies based on resonant conversion where MFT is a part
of a resonant circuit. A comprehensive analytical model that
takes into account both the geometric and frequency effects on
the given MFT leakage inductance is generated based on the
transformer physical structure, thus allowing for optimization
of the MFT design with targeted equivalent circuit leakage
inductance reference. The derived models are benchmarked to
the measurement results on the developed MFT prototype.
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