6. Conclusion

The equivalent circuit design method presented in the file is based on solid, very general physical foundations for inductive and capacitive coupling. The resulting models will not be called into question quickly, even when representing devices with weak couplings. On the other hand, the way in which losses are introduced into these circuits has been justified by multiple arguments, adapted to each type of loss: a general approach has yet to be developed. Such an approach would make it possible to answer, for example, the question still open today: in the presence of very high induced-current losses, are coupling ratios still independent of frequency? However, we need to put this reservation in its proper place: a transformer is generally designed to offer high energy efficiency, its low losses do not call into question the representation of reactive couplings and, under...