[Black_Jack]

Не в тему FEMM, но имеет отношение к дизайну магнетик-компонент.
Если сочтете нужным - перенесите в другую тему.

M2Spice is a standalone open-sourced software that can convert the geometry of a planar magnetic device into SPICE simulation netlists. It can accurately capture skin and proximity effects in 1-D multiple winding, multiple layer planar magnetics at high frequencies

http://www.princeton.edu/~minjie/m2spice.html