def test_IR1(self):
"""Lcapy: check IR circuit
"""
a = Circuit()
a.add('I1 1 0 2')
a.add('R1 1 0 1')
self.assertEqual2(a.R1.V, V(2).Voc, "Incorrect voltage")
self.assertEqual2(a[1].V, V(2).Voc, "Incorrect node voltage")
def test_VRC1(self):
"""Lcapy: check VRC circuit
"""
a = Circuit()
a.add('V1 1 0 {V1 / s}')
a.add('R1 1 2')
a.add('C1 2 0')
# Note, V1 acts as a short-circuit for the impedance/admittance
self.assertEqual2(a.impedance(1, 2), (R('R1') | C('C1')).Z,
"Z incorrect across R1")
self.assertEqual2(a.impedance(2, 0), (R('R1') | C('C1')).Z,
"Z incorrect across C1")
self.assertEqual2(a.impedance(1, 0), R(0).Z, "Z incorrect across V1")
self.assertEqual2(a.admittance(1, 2), (R('R1') | C('C1')).Y,
"Y incorrect across R1")
self.assertEqual2(a.admittance(2, 0), (R('R1') | C('C1')).Y,
"Y incorrect across C1")
# This has a non-invertible A matrix.
# self.assertEqual2(a.admittance(1, 0), R(0).Y, "Y incorrect across V1")
self.assertEqual2(
a.Voc(1, 0).s,
V('V1 / s').Voc.s, "Voc incorrect across V1")
self.assertEqual(a.is_ivp, False, "Initial value problem incorrect")
self.assertEqual(a.is_dc, False, "DC incorrect")
self.assertEqual(a.is_ac, False, "AC incorrect")
def test_VCCS1(self):
"""Lcapy: check VCCS
"""
a = Circuit()
a.add('V1 1 0 2')
a.add('R1 1 0 1')
a.add('G1 2 0 1 0 3')
a.add('R2 2 0 1')
self.assertEqual2(a.R2.V, V(6).Voc, "Incorrect voltage")
def test_CCVS1(self):
"""Lcapy: check CCVS
"""
a = Circuit()
a.add('V1 1 0 10')
a.add('R1 1 2 2')
a.add('V2 2 0 0')
a.add('H1 3 0 V2 2')
a.add('R2 3 0 1')
self.assertEqual2(a.R2.V, V(10).Voc, "Incorrect voltage")
def test_VRL1(self):
"""Lcapy: check VRL circuit
"""
a = Circuit()
a.add('V1 1 0 {V1 / s}')
a.add('R1 1 2')
a.add('L1 2 0 L1 0')
# This currently fails due to two symbols of the same name
# having different assumptions.
# Note, V1 acts as a short-circuit for the impedance/admittance
self.assertEqual2(
a.thevenin(1, 2).Voc, a.Voc(1, 2), "incorrect thevenin voltage")
self.assertEqual2(
a.thevenin(1, 2).Z, a.impedance(1, 2),
"incorrect thevenin impedance")
self.assertEqual2(
a.norton(1, 2).Isc, a.Isc(1, 2), "incorrect norton current")
self.assertEqual2(
a.norton(1, 2).Y, a.admittance(1, 2),
"incorrect norton admittance")
self.assertEqual2(a.impedance(1, 2), (R('R1') | L('L1')).Z,
"Z incorrect across R1")
self.assertEqual2(a.impedance(2, 0), (R('R1') | L('L1')).Z,
"Z incorrect across L1")
self.assertEqual2(a.impedance(1, 0), R(0).Z, "Z incorrect across V1")
self.assertEqual2(a.admittance(1, 2), (R('R1') | L('L1')).Y,
"Y incorrect across R1")
self.assertEqual2(a.admittance(2, 0), (R('R1') | L('L1')).Y,
"Y incorrect across L1")
# This has a non-invertible A matrix.
# self.assertEqual2(a.admittance(1, 0), R(0).Y, "Y incorrect across V1")
self.assertEqual2(a.Voc(1, 0),
V('V1' / s).Voc, "Voc incorrect across V1")
self.assertEqual(a.is_ivp, True, "Initial value problem incorrect")
self.assertEqual(a.is_dc, False, "DC incorrect")
self.assertEqual(a.is_ac, False, "AC incorrect")
def test_VRL1_dc2(self):
"""Lcapy: check VRL circuit at dc but with initial conditions
"""
# TODO: This currently fails due to two symbols of the same name
# having different assumptions.
a = Circuit()
a.add('V1 1 0 {V1 + 1}')
a.add('R1 1 2')
a.add('L1 2 0 L1 {(V1 + 1) / R1}')
# This tests if symbols are converted to the defined ones.
self.assertEqual2(a.L1.v,
V(0).Voc.s.inverse_laplace(),
"Incorrect time domain voltage")
v = Vs('(V1+1)/s', dc=False).inverse_laplace()
self.assertEqual2(a.R1.v, v, "Incorrect time domain voltage")
self.assertEqual(a.is_ivp, True, "Initial value problem incorrect")
self.assertEqual(a.is_dc, False, "DC incorrect")
self.assertEqual(a.is_ac, False, "AC incorrect")
from lcapy import R, V
n = V(20) + R(2)
n.draw('VRseries.png')
from lcapy import Shunt, Series, R, V
tp = Shunt(R('R1')).chain(Series(R('R2') + V('V1')))
tp.draw(__file__.replace('.py', '.png'))