Q3D issuse: why DC resistance is greater than AC resistance at 60Hz and 20kHz?
I'm working on extraction of parasitic parameters of power module by Q3D.
For default, AC resistance&inductance is extracted at 1GHz. The results from this setting looks good, and AC resistance is much greater than DC resistance due to skin effect and proximity effect.
However, the results are wired when I change the solution frequency to 60Hz or 20kHz, the DC resistance is 10 times larger than AC.
Does anybody have the same issue, or give me some suggestion about it?