Dave..The way that you built the sliding air gap geometry didn't entirely make sense topologically. I've made some minor modifications and put the results in the attached zip. Now, the force that one would calculate isn't exactly zero (because finite elements are only an approximate solution), but it's much closer than before--on the same order as the vertical force, which also ought to be zero.
I try to calculate forces in a PM-iron structure (please see attached
.fem file). I'm using the boundary condition in order to modify the
position of the stator (central part of the structure). The problem is,
even thought I the stator is smooth (no slot) I'm getting different
force values for different position, which is unexpected. If I have
smooth surface, I don't have cogging force. However, the magnetic energy
is constant for any position. What could be the problem?
thanks
Juan
-- David Meeker dmeeker@xxxxxxxx http://femm.berlios.de/dmeeker
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zip00050.zip
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