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Double Pulse Test#
Description: build the equivalent circuit of a DPT
In this example the steps to build up the circuit schematic are shown.
Insert Circuit Components
Create the Wiring
Insert simulation set up
View the results.
Keywords: Power Electronics, Double Pulse Testing
Perform imports and define constants#
Perform required imports.
[1]:
import os
import tempfile
import time
[2]:
import ansys.aedt.core
Define constants.
[3]:
AEDT_VERSION = "2025.1"
NUM_CORES = 4
NG_MODE = False # Open AEDT UI when it is launched.
Create temporary directory#
Create a temporary directory where downloaded data or dumped data can be stored. If you’d like to retrieve the project data for subsequent use, the temporary folder name is given by temp_folder.name.
[4]:
temp_folder = tempfile.TemporaryDirectory(suffix=".ansys")
Launch AEDT and Circuit#
[5]:
project_name = os.path.join(temp_folder.name, "my_project.aedt")
circuit = ansys.aedt.core.Circuit(
project=project_name,
version=AEDT_VERSION,
non_graphical=NG_MODE,
new_desktop=True,
)
circuit.modeler.schematic.schematic_units = "mil"
PyAEDT INFO: Python version 3.10.11 (tags/v3.10.11:7d4cc5a, Apr 5 2023, 00:38:17) [MSC v.1929 64 bit (AMD64)].
PyAEDT INFO: PyAEDT version 0.16.dev0.
PyAEDT INFO: Initializing new Desktop session.
PyAEDT INFO: Log on console is enabled.
PyAEDT INFO: Log on file C:\Users\ansys\AppData\Local\Temp\pyaedt_ansys_4fac4ece-a565-4c4d-8a6b-88afbba75180.log is enabled.
PyAEDT INFO: Log on AEDT is disabled.
PyAEDT INFO: Debug logger is disabled. PyAEDT methods will not be logged.
PyAEDT INFO: Launching PyAEDT with gRPC plugin.
PyAEDT INFO: New AEDT session is starting on gRPC port 61296.
PyAEDT INFO: Electronics Desktop started on gRPC port: 61296 after 6.864903688430786 seconds.
PyAEDT INFO: AEDT installation Path C:\Program Files\ANSYS Inc\v251\AnsysEM
PyAEDT INFO: Ansoft.ElectronicsDesktop.2025.1 version started with process ID 4264.
PyAEDT INFO: Project my_project has been created.
PyAEDT INFO: No design is present. Inserting a new design.
PyAEDT INFO: Added design 'Circuit Design_KNA' of type Circuit Design.
PyAEDT INFO: Aedt Objects correctly read
PyAEDT INFO: ModelerCircuit class has been initialized! Elapsed time: 0m 0sec
PyAEDT INFO: ModelerNexxim class has been initialized!
PyAEDT INFO: Modeler class has been initialized! Elapsed time: 0m 0sec
Variable initialization to create a parametric design#
Initialize dictionary that contain all the definitions for the design variables.
[6]:
design_properties = {
"VoltageDCbus": "400V",
"r_g1": "2.2",
"r_g2": "2.2",
"c_dc_link": "0.0005farad",
"l_load": "7.7e-5",
"Vgate_top": "-5V",
"r_load": "0.1",
"r_dc_link": "1e6",
"v_pwl_high": "18.0V",
"v_pwl_low": "-5.0V",
}
Define design variables from the created dictionaries.
[7]:
for k, v in design_properties.items():
circuit[k] = v
Insert Circuit Elements into the Schematic#
Define starting position for component placement.
[8]:
y_upper_pin = 5200
y_lower_pin = 2000
Define parametrically high and low voltage level for pwl voltage source.
[9]:
time_list_pwl = [
0.0,
5.0e-6,
5.001e-6,
9.825e-06,
9.826e-06,
1.1e-05,
1.1001e-05,
1.3e-05,
1.3001e-05,
]
volt_list_pwl = [
"v_pwl_low",
"v_pwl_low",
"v_pwl_high",
"v_pwl_high",
"v_pwl_low",
"v_pwl_low",
"v_pwl_high",
"v_pwl_high",
"v_pwl_low",
]
Add circuit components to the schematic.
[10]:
v_pwl = circuit.modeler.components.create_voltage_pwl(
name="v_pwl",
time_list=time_list_pwl,
voltage_list=volt_list_pwl,
location=[600, 2800],
)
v_gate_top = circuit.modeler.components.create_voltage_dc(
name="Vgate_top", value="Vgate_top", location=[600, 4500]
)
v_dc_bus = circuit.modeler.components.create_voltage_dc(
name="v_dc_bus", value="VoltageDCbus", location=[-1800, 3800]
)
c_dc_link = circuit.modeler.schematic.create_capacitor(
name="c_dc_link", value="c_dc_link", location=[-1300, 3800], angle=90
)
r_dc_link = circuit.modeler.schematic.create_resistor(
name="r_dc_link", value="r_dc_link", location=[-700, 3800], angle=90
)
l_load = circuit.modeler.schematic.create_inductor(
name="l_load", value="l_load", location=[3000, 4800], angle=-90
)
r_load = circuit.modeler.schematic.create_resistor(
name="r_load", value="r_load", location=[3000, 4300], angle=90
)
r_g1 = circuit.modeler.schematic.create_resistor(
name="r_g1", value="r_g1", location=[1400, 4700], angle=180
)
r_g2 = circuit.modeler.schematic.create_resistor(
name="r_g2", value="r_g2", location=[1400, 3100], angle=180
)
voltm_g = circuit.modeler.components.components_catalog["Probes:VPROBE_DIFF"].place(
assignment="voltage_g", location=[100, 2900], angle=270
)
voltm_g.parameters["Name"] = "voltage_g"
voltm_ds = circuit.modeler.components.components_catalog["Probes:VPROBE_DIFF"].place(
assignment="voltage_ds", location=[2500, 3300], angle=0
)
voltm_ds.parameters["Name"] = "voltage_ds"
amm_top = circuit.modeler.components.components_catalog["Probes:IPROBE"].place(
assignment="Itop", location=[1100, 5200], angle=0
)
amm_top.parameters["Name"] = "Itop"
amm_ind = circuit.modeler.components.components_catalog["Probes:IPROBE"].place(
assignment="Iinductor", location=[2500, 4000], angle=0
)
amm_ind.parameters["Name"] = "Iinductor"
amm_bot = circuit.modeler.components.components_catalog["Probes:IPROBE"].place(
assignment="Ibottom", location=[2000, 3600], angle=270
)
amm_bot.parameters["Name"] = "Ibottom"
Add nMOS components from Component Library.#
Please check that chosen component can access the method place() If you need to insert a component from a spice model, please use the method: circuit.modeler.components.create_component_from_spicemodel
[11]:
nmos_h = circuit.modeler.components.components_catalog[
"Power Electronics Tools\\Power Semiconductors\\MOSFET\\STMicroelectronics:SCT040H65G3AG_V2"
].place(assignment="NMOS_HS", location=[1500, 4700], angle=0)
nmos_l = circuit.modeler.components.components_catalog[
"Power Electronics Tools\\Power Semiconductors\\MOSFET\\STMicroelectronics:SCT040H65G3AG_V2"
].place("NMOS_LS", location=[1500, 3100], angle=0)
Create wiring to complete the schematic.#
[12]:
circuit.modeler.schematic.connect_components_in_series(
assignment=[l_load, r_load], use_wire=True
)
circuit.modeler.schematic.connect_components_in_series(
assignment=[v_gate_top, r_g1], use_wire=True
)
circuit.modeler.schematic.connect_components_in_series(
assignment=[v_pwl, r_g2], use_wire=True
)
circuit.modeler.schematic.create_wire(
[
[v_dc_bus.pins[1].location[0], v_dc_bus.pins[1].location[1]],
[v_dc_bus.pins[1].location[0], y_upper_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[c_dc_link.pins[1].location[0], c_dc_link.pins[1].location[1]],
[c_dc_link.pins[1].location[0], y_upper_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[r_dc_link.pins[0].location[0], r_dc_link.pins[0].location[1]],
[r_dc_link.pins[0].location[0], y_upper_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[l_load.pins[0].location[0], l_load.pins[0].location[1]],
[l_load.pins[0].location[0], y_upper_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[l_load.pins[0].location[0], y_upper_pin],
[nmos_h.pins[0].location[0], y_upper_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[v_dc_bus.pins[0].location[0], y_upper_pin],
[amm_top.pins[0].location[0], amm_top.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[amm_top.pins[1].location[0], amm_top.pins[1].location[1]],
[nmos_h.pins[0].location[0], y_upper_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[nmos_h.pins[0].location[0], y_upper_pin],
[nmos_h.pins[0].location[0], nmos_h.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[voltm_g.pins[1].location[0], voltm_g.pins[1].location[1]],
[voltm_g.pins[1].location[0], v_pwl.pins[0].location[1]],
[v_pwl.pins[0].location[0], v_pwl.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[v_pwl.pins[0].location[0], v_pwl.pins[0].location[1]],
[nmos_l.pins[3].location[0], v_pwl.pins[0].location[1]],
[nmos_l.pins[3].location[0], nmos_l.pins[3].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[v_gate_top.pins[0].location[0], v_gate_top.pins[0].location[1]],
[nmos_h.pins[3].location[0], v_gate_top.pins[0].location[1]],
[nmos_h.pins[3].location[0], nmos_h.pins[3].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[nmos_h.pins[0].location[0], y_upper_pin],
[nmos_h.pins[0].location[0], nmos_h.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[r_load.pins[1].location[0], r_load.pins[1].location[1]],
[r_load.pins[1].location[0], amm_ind.pins[1].location[1]],
[amm_ind.pins[1].location[0], amm_ind.pins[1].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[amm_ind.pins[0].location[0], amm_ind.pins[0].location[1]],
[amm_bot.pins[0].location[0], amm_ind.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[voltm_g.pins[0].location[0], voltm_g.pins[0].location[1]],
[v_pwl.pins[0].location[0], voltm_g.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[v_dc_bus.pins[0].location[0], v_dc_bus.pins[0].location[1]],
[v_dc_bus.pins[0].location[0], y_lower_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[c_dc_link.pins[0].location[0], c_dc_link.pins[0].location[1]],
[c_dc_link.pins[0].location[0], y_lower_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[r_dc_link.pins[1].location[0], r_dc_link.pins[1].location[1]],
[r_dc_link.pins[1].location[0], y_lower_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[nmos_l.pins[2].location[0], nmos_l.pins[2].location[1]],
[nmos_l.pins[2].location[0], y_lower_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[voltm_ds.pins[1].location[0], voltm_ds.pins[1].location[1]],
[voltm_ds.pins[1].location[0], y_lower_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[nmos_l.pins[2].location[0], nmos_l.pins[2].location[1]],
[nmos_l.pins[2].location[0], y_lower_pin],
]
)
circuit.modeler.schematic.create_wire(
[
[nmos_h.pins[2].location[0], nmos_h.pins[2].location[1]],
[amm_bot.pins[0].location[0], amm_bot.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[nmos_l.pins[0].location[0], nmos_l.pins[0].location[1]],
[amm_bot.pins[1].location[0], amm_bot.pins[1].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[nmos_l.pins[0].location[0], nmos_l.pins[0].location[1]],
[voltm_ds.pins[0].location[0], voltm_ds.pins[0].location[1]],
]
)
circuit.modeler.schematic.create_wire(
[
[v_dc_bus.pins[1].location[0], y_lower_pin],
[voltm_ds.pins[1].location[0], y_lower_pin],
]
)
gnd = circuit.modeler.components.create_gnd(
location=[voltm_ds.pins[1].location[0], y_lower_pin - 100]
)
r_g1.pins[1].connect_to_component(assignment=nmos_h.pins[1], use_wire=True)
r_g2.pins[1].connect_to_component(assignment=nmos_l.pins[1], use_wire=True)
[12]:
True
Create a transient setup#
[13]:
setup_name = "MyTransient"
setup1 = circuit.create_setup(
name=setup_name, setup_type=circuit.SETUPS.NexximTransient
)
setup1.props["TransientData"] = ["0.05ns", "15us"]
circuit.modeler.zoom_to_fit()
Solve transient setup
[14]:
circuit.analyze(setup_name, cores=NUM_CORES)
PyAEDT INFO: Key Desktop/ActiveDSOConfigurations/Circuit Design correctly changed.
PyAEDT INFO: Solving design setup MyTransient
PyAEDT INFO: Key Desktop/ActiveDSOConfigurations/Circuit Design correctly changed.
PyAEDT INFO: Design setup MyTransient solved correctly in 0.0h 0.0m 8.0s
[14]:
True
Plot Double Pulse Test results#
Create a report
[15]:
new_report = circuit.post.create_report(
expressions=[
"V(voltage_g)",
"V(voltage_ds)",
"Ipositive(Ibottom)",
"Ipositive(Iinductor)",
],
domain="Time",
plot_name="Plot V,I",
)
PyAEDT INFO: Post class has been initialized! Elapsed time: 0m 2sec
Release AEDT#
[16]:
circuit.save_project()
circuit.release_desktop()
# Wait 3 seconds to allow AEDT to shut down before cleaning the temporary directory.
time.sleep(3)
PyAEDT INFO: Project my_project Saved correctly
PyAEDT INFO: Desktop has been released and closed.
Clean up#
All project files are saved in the folder temp_folder.name. If you’ve run this example as a Jupyter notebook, you can retrieve those project files. The following cell removes all temporary files, including the project folder.
[17]:
temp_folder.cleanup()
Download this example
Download this example as a Jupyter Notebook or as a Python script.