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Re: permanent magnet in harmonic analysis
Hello,
You told me that I could superimpose the results from
the static and the harmonic analysis. Is it possible
to export the data to a database or elsewhere in order
to be able to add the results easily.
If I understand your answer well, it is not possible
to analyse the effect of an alternating current in my
coil in the field of a permanent magnet?
I added my file to this e-mail. Thanks
E-J Borkent
--- In femm@xxxx, David Meeker <dcm3c@xxxx> wrote:
> eborkent wrote:
I want to simulate a copper coil with an alternating
current through it in the field of a permanent magnet.
When I do this, I believe the field of the magnet is
oscillating too. Is that true and what can I do about
this?
E-J Borkent
In femm, you can only consider one frequency at a
time. The field from a permanent magnet is a dc
phenomenon. When you analyze a problem with a
permanent magnet at a frequency other than zero, the
magnet just looks like a block of plain material with
the same permeability and conductivity as the magnet.
You'd do this sort of analysis, for example, to look
at eddy currents that you might induce in the PM
material due to AC current in the coil.
Anyhow, I don't know exactly what aspects you are
after. It may be that you'd have to do a DC analysis
to get the field of the PM, and the AC analysis to get
the field of the coil + eddy currents, etc. You can
then superimpose the results (assuming linear
materials) to get the combined solution.
Dave.
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