Re: [FEMM] Circuit Prop not showing voltage/impedance?

[David Meeker <dmeeker@xxxxxxxx>]

Scott Diehl wrote:

> *Has anyone had trouble with the Circuit Prop feature not reporting 
> the voltage gradient or impedance?
> *

I've changed the things that the "Circuit Props" menu selection reports 
in the 4.0 development version. The program now sort of reports as much 
as it can, given the situation.  In every case, it will report:
Total current , Voltage Drop, Flux Linkage
If the current is nonzero, it will report Flux/Current (which can 
usually be interpreted as inductance), and Voltage/Current (which can 
usually be interpreted as impedance).
If the analysis frequency is 0 Hz, the program will report resistive 
power loss in watts.  If the analysis is AC, the program will report 
real, reactive, and total apparent power.

I've also changed the way that the mo_get_circuit_properties command 
works in the latest 4.0 development version as compared to previous 
versions.  However,  but it looks like I forgot to update the 
documentation for it--whoops.  I'll make sure to have the revised 
documentation in the next development update. The routine now returns 
six values:

 Real part of the current;
 Imaginary part of the current;
 Real part of the voltage drop;
 Imaginary part of the voltage drop;
 Real part of the flux linkage;
 Imaginary part of the flux linkage;

There were some bugs in the circuit property values reported in previous 
development versions of 4.0, mostly associated with the "series circuit 
properties" that have been relatively recently implemented.  Hopefully, 
they've all been caught in the 26Jan04 Development Version.

> * When I select this option, the only things I get are total current 
> and current density.  Incidentally, my Problem Info feature doesn't 
> display anything at all.*
> **

The "Problem Info" just re-displays the initial info in the floating 
"FEMM Output" window, e.g. information like:

 Title: design1.ans
 Length Units: Millimeters
 Axisymmetric Solution
 Frequency: 0 Hz

 16063 Nodes
 31659 Elements


Dave.