Material definition problem in ANSYS Maxwell

In summary, the conversation is about an error that occurred in Ansys Maxwell regarding the BH curve of a material. The error suggests that the slope of the end two points in the BH curve is too high, which may lead to a non-physical solution. The speaker is unsure of what caused the error, but suggests checking the measuring units to ensure they are correct. They also mention that the relative permeability of the end part of the BH curve should be close to 1-1.2, and provide a calculation for determining the correct value for miu. The speaker also provides a link for further information on solving this issue in Ansys Maxwell.
  • #1
Emy
1
0
HI Guys,
I am getting an error in Ansys Maxwell that says

Maxwell2d solver, process solver2d: Internal Solver Error: 'In the Material: M270-35A_12 , the SLOPE of the End Two Points in this BH curve is 56519.1, which is more than 2 times of Mu0; This may lead to a non-physical solution. Please check the BH curve!
Is there anyone that can offer an explanation/help with this Error?
Thank you in advance,
Emy
 
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  • #2
It is hard to say what is the problem. In my opinion you entered wrong measuring units.

B has to be Wb/m^2[Tesla] and H A/m. Check if they are not gauss and oersted.

However, even for a ferromagnetic material the relative permeability of the end part of BH curve has to be close to 1-1.2

If the SLOPE it is A/m/Wb/m^2 then miu [=Wb/m^2/A/m]=1/56519.1=1.7693E-5 H/m that means 14 times the vacuum permeability [miuo=1.25664E-06 H/m].

See also:

http://ansoft-maxwell.narod.ru/en/Maxwell_v16_L03_Static_Magnetic_Solvers.pdf
 

FAQ: Material definition problem in ANSYS Maxwell

What is the material definition problem in ANSYS Maxwell?

The material definition problem in ANSYS Maxwell refers to the difficulty in accurately defining the material properties of a material in the software. This is a common issue in simulation software, as the accuracy of the results heavily depends on the accuracy of the material properties input.

Why is the material definition important in ANSYS Maxwell simulations?

The material definition is crucial in ANSYS Maxwell simulations because it directly affects the accuracy of the results. Material properties such as conductivity, permeability, and dielectric constant have a significant impact on the behavior of electromagnetic fields, and any errors in their definition can lead to inaccurate results.

What are the common causes of material definition problems in ANSYS Maxwell?

The most common cause of material definition problems in ANSYS Maxwell is incorrect input of material properties. This can be due to using the wrong units, incomplete data, or using the wrong material model. Another cause can be the use of highly complex materials that are difficult to accurately define.

How can material definition problems in ANSYS Maxwell be resolved?

To resolve material definition problems in ANSYS Maxwell, it is essential to carefully review and double-check all material properties input. It is also helpful to use reliable material databases and to consult with experts in the field. Additionally, simplifying the material model or using approximation methods can also help in resolving material definition problems.

What are some best practices for avoiding material definition problems in ANSYS Maxwell?

To avoid material definition problems in ANSYS Maxwell, it is crucial to carefully review and verify all material properties before inputting them into the software. It is also recommended to use material databases or consult with experts for accurate and reliable material data. Additionally, using simpler material models and regularly checking and updating material properties can also help prevent material definition problems.

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