Twin Builder: wiring a rectifier with a capacitor filter

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 math
import matplotlib.pyplot as plt
import pyaedt

Set AEDT version

Set AEDT version.

aedt_version = "2024.1"

Select version and set launch options

Select the Twin Builder version and set the launch options. The following code launches Twin Builder 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 = pyaedt.TwinBuilder(projectname=pyaedt.generate_unique_project_name(),
                        specified_version=aedt_version,
                        non_graphical=non_graphical,
                        new_desktop_session=new_thread
                        )

C:\actions-runner\_work\_tool\Python\3.10.9\x64\lib\subprocess.py:1072: ResourceWarning: subprocess 10224 is still running
  _warn("subprocess %s is still running" % self.pid,
C:\actions-runner\_work\pyaedt\pyaedt\testenv\lib\site-packages\pyaedt\generic\settings.py:383: ResourceWarning: unclosed file <_io.TextIOWrapper name='D:\\Temp\\pyaedt_ansys.log' mode='a' encoding='cp1252'>
  self._logger = val

Create components for bridge rectifier

Create components for a bridge rectifier with a capacitor filter.

# Define the grid distance for ease in calculations.

G = 0.00254

# Create an AC sinosoidal source component.

source = tb.modeler.schematic.create_voltage_source("V_AC", "ESINE", 100, 50, [-1 * G, 0])

# Create the four diodes of the bridge rectifier.

diode1 = tb.modeler.schematic.create_diode(compname="D1", location=[10 * G, 6 * G], angle=270)
diode2 = tb.modeler.schematic.create_diode(compname="D2", location=[20 * G, 6 * G], angle=270)
diode3 = tb.modeler.schematic.create_diode(compname="D3", location=[10 * G, -4 * G], angle=270)
diode4 = tb.modeler.schematic.create_diode(compname="D4", location=[20 * G, -4 * G], angle=270)

# Create a capacitor filter.

capacitor = tb.modeler.schematic.create_capacitor(compname="C_FILTER", value=1e-6, location=[29 * G, -10 * G])

# Create a load resistor.

resistor = tb.modeler.schematic.create_resistor(compname="RL", value=100000, location=[39 * G, -10 * G])

# Create a ground.

gnd = tb.modeler.components.create_gnd(location=[5 * G, -16 * G])

Connect components

Connect components with wires.

# Wire the diode bridge.

tb.modeler.schematic.create_wire(points_array=[diode1.pins[0].location, diode3.pins[0].location])
tb.modeler.schematic.create_wire(points_array=[diode2.pins[1].location, diode4.pins[1].location])
tb.modeler.schematic.create_wire(points_array=[diode1.pins[1].location, diode2.pins[0].location])
tb.modeler.schematic.create_wire(points_array=[diode3.pins[1].location, diode4.pins[0].location])

# Wire the AC source.

tb.modeler.schematic.create_wire(points_array=[source.pins[1].location, [0, 10 * G], [15 * G, 10 * G], [15 * G, 5 * G]])
tb.modeler.schematic.create_wire(points_array=[source.pins[0].location, [0, -10 * G], [15 * G, -10 * G], [15 * G, -5 * G]])

# Wire the filter capacitor and load resistor.

tb.modeler.schematic.create_wire(points_array=[resistor.pins[0].location, [40 * G, 0], [22 * G, 0]])
tb.modeler.schematic.create_wire(points_array=[capacitor.pins[0].location, [30 * G, 0]])

# Wire the ground.

tb.modeler.schematic.create_wire(points_array=[resistor.pins[1].location, [40 * G, -15 * G], gnd.pins[0].location])
tb.modeler.schematic.create_wire(points_array=[capacitor.pins[1].location, [30 * G, -15 * G]])
tb.modeler.schematic.create_wire(points_array=[gnd.pins[0].location, [5 * G, 0], [8 * G, 0]])

# Zoom to fit the schematic
tb.modeler.zoom_to_fit()

Parametrize transient setup

Parametrize the default transient setup by setting the end time.

tb.set_end_time("100ms")

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 = "V_AC.V"
x = tb.post.get_solution_data(E_Value, "TR", "Time")
plt.plot(x.intrinsics["Time"], x.data_real(E_Value))

R_Value = "RL.V"
x = tb.post.get_solution_data(R_Value, "TR", "Time")
plt.plot(x.intrinsics["Time"], x.data_real(R_Value))

plt.grid()
plt.xlabel("Time")
plt.ylabel("AC to DC Conversion using Rectifier")
plt.show()

Close Twin Builder

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

tb.release_desktop()

True