Re: Incorrect Field values returned by FEMM

["vecerkaj" <vecerkaj@xxxxxxxxx>]

--- In femm@xxxx, "cgn38nuc" <cgn38nuc@xxxx> wrote:
> I am using FEMM 3.1 to analysis a lifting magnet. The results as 
> returned by the program indicate a maximum B value of 5.3 Tesla 4" 
> from the working surface of the magnet. But, the saturation of 
steel 
> only produces slighly more than 2 Tesla. I wasusing the B-H curve 
of 
> 1020 Steel in my formulation. What am I missing from my analysis.
> 
> Thank you,
> Paul Sheridan

Hi
It looks like you calculated it as a harmonic analysis. In that case 
the BH curve is ignored and linear mi(B/H) is used instead of BH 
curves.
Another reason for the problem could happen, when you define two 
block parameters for one region. In that case you are not sure which 
parameters were used. (I mean, if you don't close an iron region (by 
mistake), FEMM can "catch" parameters from surrounding air instead of 
supposed iron parameters).
Both mistakes you can find out in the postprocessor by checking of mi 
in the iron region.

Jiri Vecerka