  DC-DC converters with galvanic isolation are a key element in the aircraft DC
distribution system and Dual and Triple Active Bridge converters are one of the
most interesting candidates in this application. The high-frequency transformer
leakage inductances play a key role in the AC Link of these converters. This
leakage inductances determine the power transfer capability of the converter
and shape the AC link currents. The leakage inductance value is related to the
distribution of the transformer windings and it changes with the RMS value of
the AC link current. In this paper, first a high frequency transformer is
designed for a Dual and Triple Active Bridge converter for the More Electric
Aircraft DC power system. Then, an Ansys/Maxwell Finite Element analysis is
performed on the leakage inductances of the transformer in three different
winding configurations and in different AC link RMS current values. Finally,
the transient performance of the design is validated by the Ansys/Maxwell
Transient.
