H in magnets

[marco valcavi <mvalca@xxxxxxxxx>]

Hi!

I noted that there is a strange calculation of the H
field in the permanent magnets.


I inserted data about a ceramic ferrite, following the
instruction, so I shifted the demagnetization curve to
the right to meet the origin.
I include this magnet in an axisimmetric magnetic
circuit with steel and a gap. 

Inspecting with FEMM (3.0 and 3.1) the H field, I
found that the output of the H field (Hout) is
different from the correct value (Hcorrect):

Hcorrect=Hc - Hout

where Hc is the coercitivity field . 

This strange value affect all the calculation based on
the H field inside the magnet.

bye (ciao)

Marco 


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