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Computation the inductance of bar conductor by Simulation in Flux3D

Hello Altair community ,

I hope this message finds you well. I am currently working on simulating an aluminum bar with following dimensions: radius=5.642mm and length=200mm (see attachment 1). The simulation is conducted in Flux 3d, using magneto harmonic application, with a low voltage 2v ,50Hz (see attachment 2).

However, l am facing an issue with the inductance calculation regardless the method used the (energy, or impedance..),the calculated the inductance value consistently remains at 0.12uh, which is lower than the expected exact value is 0.14uh, despite mes efforts, I have been unable to optimize the simulation further.

I am reaching out to the Altair community in the hope that someone with expertise in electromagnetic simulation can provide assistance or validation of for this model. I am in a times sensitive situation and any guidance or validation would be greatly appreciated.

Thank you very mush for your time and consideration.

Sincerely

Sam

circut.jpg

geometric.jpg

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Flux

v2020.0

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Letizia Ferrara

Hello Sam Adik,

Thanks for writing us, could you please open a support request and upload the model?

This will help us to check the model in detail and arrange a meeting in case.

Best regards,

Letizia

C_Favre

Hello Sam,

in your case as you have only a portion of bar in the FE domain without a closed loop of current, the FluxPEEC application will be more adapted to compute the inductance in this case.

To start this application select PEEC instead of 3D in the supervisor.

Find attached a text file containing command to build and solved the corresponding FluxPEEC project.

At the end you will obtained the impedance by clicking on the impedance probe in the data tree.

I hope this helps.

Best regards.

Cyril Favre

Bar.txt

Sam Adik

Hello Sam Adik,

Thanks for writing us, could you please open a support request and upload the model?

This will help us to check the model in detail and arrange a meeting in case.

Best regards,

Letizia

Hello Letizia,

I extend my heartfelt gratitude for your responses to my questions. I am now providing the program you requested from me, including all necessary files and command instructions.

I eagerly await your response and sincerely appreciate your assistance in advance.

Best regards,

Sam

barre.txt

round_ conductor.FLU.rar

Ovando_RBB

Hi there,

The difference between the value that you are looking for and the results obtained is relatively small; I can pretty much attribute that difference to how big is the volume of air that you are considering. Try to increase the volume of air and recompute the inductance; make a X-Y graph in excel where you track the value of the inductance (Y) against the size of the volume of air (X), if what i am saying is correct then you should be able to see how the value of the inductance stabilizes towards a constant fixed value as you increase the size of the volume of air. For an infinite volume of air your inductance should be 0.14uH if this proposed explanation is correct.