Bug located in set_coreloss_at_frequency

[yliu44197]

Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

Description of the bug

Core loss model in Maxwell can be set up as Electrical Steel or Power Ferrite as known to all. A bug issue was noticed when setting up these types of core loss model with pyaedt by regression.

"coefficient_setup" is a parameter which was supposed to enable users to calculate the coefficients by entering the BP data in various core loss units. In the latest release of pyaedt, however, users can only obtain the desired result if they use "w_per_cubic_meter" as the unit.

Steps To Reproduce

By running the code below we added a new electrical steel material in AEDT.

from ansys.aedt.core import Maxwell3d

M3D = Maxwell3d(project="Project1", design="Maxwell3DDesign1", solution_type="EddyCurrent")
CoreMaterial = M3D.materials.add_material(name="Core_Grade_1")
CoreMaterial.mass_density = 7650
CoreMaterial.set_coreloss_at_frequency(points_at_frequency={60 : [[0,0], [0.5,0.06], [1,0.22], [1.5,0.51], [2,1.54]]},
                                       thickness="0.2mm", conductivity=2000000, coefficient_setup="w_per_kg",
                                       core_loss_model_type="Electrical Steel")

M3D.release_desktop(False, False)

However, we obtained the incorrect core loss model.

Fixing this bug is simple. The root cause is that there is no parameter for core loss unit when calculating the coefficients by executing "get_core_loss_coefficients" in the function. As a result, the coefficients can only be calculated with core loss unit by default in "w_per_cubic_meter".

coefficients = self.get_core_loss_coefficients(
            points_at_frequency, thickness=thickness, conductivity=conductivity
        )

By correlating the parameters, the bug can be fixed and we may now obtain the correct core loss model.

coefficients = self.get_core_loss_coefficients(
            points_at_frequency, thickness=thickness, conductivity=conductivity, coefficient_setup=coefficient_setup
        )

Which Operating System are you using?

Windows

Which Python version are you using?

3.12

Installed packages

annotated-types==0.7.0
ansys-pythonnet==3.1.0rc6
attrs==24.2.0
certifi==2025.1.31
cffi==1.17.1
charset-normalizer==3.4.1
clr_loader==0.2.7.post0
contourpy==1.3.1
cycler==0.12.1
defusedxml==0.7.1
et_xmlfile==2.0.0
fonttools==4.56.0
fpdf2==2.8.2
grpcio==1.70.0
idna==3.10
jsonschema==4.23.0
jsonschema-specifications==2024.10.1
kiwisolver==1.4.8
matplotlib==3.10.1
numpy==2.2.3
openpyxl==3.1.5
packaging==24.2
pandas==2.2.3
pillow==11.1.0
platformdirs==4.3.6
plumbum==1.9.0
pooch==1.8.2
psutil==7.0.0
pyaedt==0.15.0
pycparser==2.22
pydantic==2.10.6
pydantic_core==2.27.2
pyedb==0.38.0
pyparsing==3.2.1
python-dateutil==2.9.0.post0
pytz==2025.1
pyvista==0.44.1
pywin32==309
PyYAML==6.0.2
referencing==0.35.1
requests==2.32.3
rpds-py==0.23.1
rpyc==6.0.1
rtree==1.4.0
scikit-rf==1.6.2
scipy==1.15.2
scooby==0.10.0
six==1.17.0
toml==0.10.2
tomli_w==1.2.0
typing_extensions==4.12.2
tzdata==2025.1
urllib3==2.3.0
vtk==9.4.1
xlwings==0.33.11

[gmalinve]

Hi @yliu44197, thanks for your feedback. I just open a PR #5939 to fix this!