A High-Power Medium-Voltage Medium-Frequency Transformer Design Methodology

IEEE Annual Southern Power Electronics Conference, pp. 1–8

Abstract

The three-phase Medium-Frequency Transformer (MFT3) is the cornerstone element of the three-phase Dual-Active Bridge (DAB3) converter system, requiring meticulous design. This paper presents a comprehensive design methodology based on 10 free design parameters. The design procedure takes into account an asymmetric leakage inductance distribution and introduces a novel approach to calculate the concatenated magnetic flux, impacting both the core design and losses. As the parasitic elements of the transformer can lead to converter instabilities, the MFT3's frequency response is assessed to ensure a stable DAB3 operation incorporating the selected transformer design.

Authors 2

1. Fabian Herzig

   Siemens (Germany) · Siemens Energy

   Affiliation as printed

   Sustainable Energy Systems, Siemens Energy,Erlangen,Germany

2. Rik W. De Doncker Aachen E.ON Energy Research Center

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,E.ON Energy Research Center,Aachen,Germany