Twin Builder: RC circuit design anaysis

This example shows how you can use PyAEDT to create a Twin Builder design and run a Twin Builder time-domain simulation.

Perform required imports

Perform required imports.

import ansys.aedt.core

Set AEDT version

Set AEDT version.

aedt_version = "2024.2"

Select version and set launch options

Select the Twin Builder version and set the launch options. The following code launches Twin Builder 2023 R2 in graphical mode.

You can change the Boolean parameter non_graphical to True to launch Twin Builder in non-graphical mode. You can also change the Boolean parameter new_thread to False to launch Twin Builder in an existing AEDT session if one is running.

non_graphical = False
new_thread = True

Launch Twin Builder

Launch Twin Builder using an implicit declaration and add a new design with a default setup.

tb = ansys.aedt.core.TwinBuilder(project=ansys.aedt.core.generate_unique_project_name(),
                        version=aedt_version,
                        non_graphical=non_graphical,
                        new_desktop=new_thread
                        )
tb.modeler.schematic_units = "mil"

C:\actions-runner\_work\_tool\Python\3.10.9\x64\lib\subprocess.py:1072: ResourceWarning: subprocess 7496 is still running
  _warn("subprocess %s is still running" % self.pid,
C:\actions-runner\_work\pyaedt\pyaedt\.venv\lib\site-packages\ansys\aedt\core\generic\settings.py:231: ResourceWarning: unclosed file <_io.TextIOWrapper name='D:\\Temp\\pyaedt_ansys_81252a54-e251-4230-b99f-ef1acafc5894.log' mode='a' encoding='cp1252'>
  self.__logger = val

Create components for RC circuit

Create components for an RC circuit driven by a pulse voltage source. Create components, such as a voltage source, resistor, and capacitor.

source = tb.modeler.schematic.create_voltage_source("E1", "EPULSE", 10, 10, [0, 0])
resistor = tb.modeler.schematic.create_resistor("R1", 10000, [1000, 1000], 90)
capacitor = tb.modeler.schematic.create_capacitor("C1", 1e-6, [2000, 0])

Create ground

Create a ground, which is needed for an analog analysis.

gnd = tb.modeler.components.create_gnd([0, -1000])

Connect components

Connects components with pins.

source.pins[1].connect_to_component(resistor.pins[0])
resistor.pins[1].connect_to_component(capacitor.pins[0])
capacitor.pins[1].connect_to_component(source.pins[0])
source.pins[0].connect_to_component(gnd.pins[0])

(True, <ansys.aedt.core.modeler.circuits.object_3d_circuit.CircuitComponent object at 0x0000023B0385AAD0>, <ansys.aedt.core.modeler.circuits.object_3d_circuit.CircuitComponent object at 0x0000023B0385A080>)

Parametrize transient setup

Parametrize the default transient setup by setting the end time.

tb.set_end_time("300ms")

True

Solve transient setup

Solve the transient setup.

tb.analyze_setup("TR")

True

Get report data and plot using Matplotlib

Get report data and plot it using Matplotlib. The following code gets and plots the values for the voltage on the pulse voltage source and the values for the voltage on the capacitor in the RC circuit.

E_Value = "E1.V"
C_Value = "C1.V"

x = tb.post.get_solution_data([E_Value, C_Value], "TR", "Time")
x.plot([E_Value, C_Value], x_label="Time", y_label="Capacitor Voltage vs Input Pulse")

tb.save_project()

C:\actions-runner\_work\pyaedt\pyaedt\.venv\lib\site-packages\pandas\core\arraylike.py:399: RuntimeWarning: invalid value encountered in sqrt
  result = getattr(ufunc, method)(*inputs, **kwargs)

True

Close Twin Builder

After the simulation completes, you can close Twin Builder or release it. All methods provide for saving the project before closing.

tb.release_desktop()

True