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Dave,
Many thanks, daylight now dawns,
Stan.
----- Original Message -----
Sent: Thursday, September 13, 20015:54
AM
Subject: Re: [femm] Permanent Magnets
& Frequency.
In a message dated
9/11/01 5:07:12 PM Eastern Daylight Time,
stan@xxxxxxxxxxxxxxxxxxxxxxxx
writes:
Help:-
When defining a Problem Definition/Frequency of,say
100Hz, then
permanent magnets in the magnetic circuit are switched at
the same
frequency. Is there any work-around for this?
Regards Stan
Well, the magnetization in thePMs
shouldn't (doesn't, which I checked to
make sure) vary at the problem's
frequency for harmonic problems. For AC
problems, the solver treats
magnets as just plain blocks of material with the
same permeability and
conductivity as the permanent magnet, but no
magnetization. The
reason for this is that if linearity is a good assumption
(and it must be,
for the harmonic problems in the present formulation to be
valid), a
problem with things happening at different frequencies can be
broken down
into a number of single-frequency problems and the results from
all the
analyses simply superimposed to get the total solution.
Dave.
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