  In conventional finite element simulations, foil windings with thin foils and
with a large number of turns require many mesh elements. This renders models
quickly computationally infeasible. This paper uses a homogenized foil winding
model and approximates the voltage distribution in the foil winding domain by
globally supported polynomials. This way, the small-scale structure in the foil
winding domain does not have to be resolved by the finite element mesh. The
method is validated successfully for a stand-alone foil winding example and for
a pot inductor example. Moreover, a transformer equipped with a foil winding at
its primary side is simulated using a field-circuit coupled model.
