Inductors

[Pat Hanrahan]

pycircuit is very nice!

I tried the following simple program using inductors, and it doesn't
seem to work. Any idea what's going on?

from scipy import *
from pycircuit.circuit import *
from pylab import *
from pycircuit.post.functions import *

l = 125e-3
c = 100e-6

cir=SubCircuit()

cir['VS'] = VS(1, gnd, vac=1.0)
cir['C1'] = C(1, gnd, c)
cir['L1'] = L(1, 2, l)
cir['C2'] = C(2, gnd, c)

ac = AC(cir)
# from f=0 to 1000
res = ac.solve(freqs=logspace(0,6))

vnet1 = res.v(2)

print type(vnet1)
print vnet1, vnet1.ylabel
vnet1.semilogx()
grid(True)
show()

[Joacim Frisk]

Your example works in an older version. Seems like I've broken
something when I fixed AC based on DC steady-state.

I'll try to fix this, but you could try to check out a version from
before june meanwhile.

Regards,
Joacim

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[andreas dreyfert]

Joacim,

That change also broke linear symbolic parts of Pycircuit as no symbolic DC soultion is provided. One
could use the Symbolic DC solver Henrik wrote to implement the DC solution for the symbolic parts.

Best Regards,
Andreas

[Pat Hanrahan]

Thanks for your help.

I found the problem with that program. I wan't setting the inductance
properly. I needed to change

> > cir['L1'] = L(1, 2, l)

to L(1,2, L=l)

Pat

[Pat Hanrahan]

I ran the following program and it didn't converge. I set the maximum
number of iterations to 1000, and it worked.

Pat

from scipy import *
from pycircuit.circuit import *
from pylab import *
from pycircuit.post.functions import *

rr = 1000.

cir=SubCircuit()

cir['VS'] = VS(1, gnd, v=5.)
cir['R1'] = R(1, 2, r=rr)
cir['D1'] = Diode(2, gnd)

dc = DC(cir)
res = dc.solve()

print res.v(1), res.v(2)