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Err in Math

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pggood

New Zealand
1 Posts

Posted - May 29 2017 : 22:36:32

I am trying to model a basic planar inductor and I get Err in math
.units mm
N1 x=25.0 y=12.5 z=0
N2 x=-25.0 y=12.5 z=0
N3 x=-25.0 y=-12.5 z=0
N4 x=25.0 y=-12.5 z=0
N5 x=25.0 y=7.5 z=0
N6 x=-20.0 y=7.5 z=0
N7 x=-20.0 y=-7.5 z=0
N8 x=20.0 y=-7.5 z=0
N9 x=20.0 y=2.5 z=0
N10 x=-15.0 y=2.5 z=0
N11 x=-15.0 y=-2.5 z=0
N12 x=15.0 y=-2.5 z=0
N13 x=15.0 y=-2.5 z=0
E1 N1 N2 W=0.5 H=0.03406 nhinc=5 nwinc=7
E2 N2 N3 W=0.5 H=0.03406 nhinc=5 nwinc=7
E3 N3 N4 W=0.5 H=0.03406 nhinc=5 nwinc=7
E4 N4 N5 W=0.5 H=0.03406 nhinc=5 nwinc=7
E5 N5 N6 W=0.5 H=0.03406 nhinc=5 nwinc=7
E6 N6 N7 W=0.5 H=0.03406 nhinc=5 nwinc=7
E7 N7 N8 W=0.5 H=0.03406 nhinc=5 nwinc=7
E8 N8 N9 W=0.5 H=0.03406 nhinc=5 nwinc=7
E9 N9 N10 W=0.5 H=0.03406 nhinc=5 nwinc=7
E10 N10 N11 W=0.5 H=0.03406 nhinc=5 nwinc=7
E11 N11 N12 W=0.5 H=0.03406 nhinc=5 nwinc=7
E12 N12 N13 W=0.5 H=0.03406 nhinc=5 nwinc=7
.external N1 N13
.freq fmin=1e4 fmax=1e4 ndec=1
.end

Peter NZ

Enrico

530 Posts

Posted - May 30 2017 : 22:36:34

The best strategy for this kind of errors is to delete portions of the file until you single out the part that causes the issue.

In your case this was simple, nodes N11 and N12 are coincident:

N12 x=15.0 y=-2.5 z=0
N13 x=15.0 y=-2.5 z=0

This of course is not allowed, but unfortunately is not easy to catch (check if any node is coincident with any other would in principle require N^2 operations; with special algorithms you can lower the complexity, but this is not the goal of FastHenry, and in some cases you may even want coincident notes for your convenience, think about ground planes for instance).

Best Regards,
Enrico

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