python CalcPort

[rlarv]

Hello,

I stumbled over this:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "myplace/StripLine2MSL.py", line 154, in <module>
    p.CalcPort( Sim_Path, f, ref_impedance = 50.0)
  File "$HOME/.local/lib/python3.9/site-packages/openEMS-0.0.33-py3.9-linux-x86_64.egg/openEMS/ports.py", line 130, in CalcPort
    self.ut_inc = 0.5 * ( self.ut_tot + self.it_tot * self.Z_ref )
AttributeError: 'MSLPort' object has no attribute 'ut_tot'

When invoking CalcPort as CalcPort( Sim_Path, f, ref_impedance = 50.0)

Using an integer 50 instead of the float 50.0 fixes the traceback.

The issue seems to be in ports.py somewhere here

        if type(self.Z_ref) == float:
            self.ut_inc = 0.5 * ( self.ut_tot + self.it_tot * self.Z_ref )
            self.it_inc = 0.5 * ( self.it_tot + self.ut_tot / self.Z_ref )
            self.ut_ref = self.ut_tot - self.ut_inc
            self.it_ref = self.it_inc - self.it_tot

[thliebig]

The correct repository for this issue would have been openEMS. Not openEMS-Project which is only a "Meta" Project to connect all the dependencies, create documentation and simplify the build process... But I can see how that is hard to figure out from the outside ;) I will have a look what is going on here...

[thliebig]

I don't know how to reproduce the problem. I'm not sure at all why this check for float is there in the first place. The calculation of the time-domain signals should always be possible? What tutorial or script did you run?

[rlarv]

Here is a piece, which I'm currently playing with.

StripLine2MSL.py.gz

That is certainly very rough in many aspects, but perhaps helps to reveal what the check for "float" was meant to do.

[rlarv]

I forgot, yes the actual simulation in time domain does work, the problem is in CalcPort() which is used for plotting.

[thliebig]

okay I have found and understood it (I think) The check for float was meant to not calculate incoming voltages and currents in time-domain (TD) in case the reference impedance was frequency dependent (aka an array) But the MSL port was never tested with a scalar ref impedance and that it never even calculated any TD voltages.

I have fixed both issues... please give it a try and close if it is fixed for you...

[rlarv]

Thank You very much, Your commit fixed the issue for me.