AA
Medium and high frequency, high power
transformers play an important role in footprint reduction along
with their functions of galvanic isolation, and voltage
transformation in all high power converters typically used in
traction power systems, offshore wind plant power converters,
and solid state transformer based distribution system grids.
This state of art report analysis the various materials and design
tradeoffs that govern the electromagnetic behavior and loss
mechanisms of the medium frequency transformer
applications. Typical winding and core geometries that have
been reported extensively in the literature are described, and
some design procedures and flow charts are analyzed including
specific optimization routines. Estimation of core loss at high
frequency using Steinmetz method and other modified methods
are shown in detail. Thermal modelling including static and
dynamic methods available in literature are put forward with
references to thermal management methods. FEM analysis for
electromagnetic behavior is described and couple of
commercially available tools and their limitations are analyzed.
Different challenges of relevance are included in different
sections and brief comparisons are drawn. Design tools which
are available is given a preview and limitations are drawn. A
comprehensive literature survey was done and included in the
paper in the reference section
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