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sta98

AFPM running in .FeMT

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Hi.

I am trying to run an axial flux motor in the e-machine extension to achieve a torque curve and efficiency map.

I have created a motor and followed the required steps in Flux. All apart from meshing the infinity box as my motor section is parallel to the y-axis and the infinity box is parallel to the x-axis resulting in the motor passing outside the box, shown in the figure below.
I have tried to perform a transformation on the Motor to move it onto the x-axis, but cannot remove the original volumes as they overlap and have tried to perform a transformation on the infinity box too, but again can't remove the original lines. 

image.thumb.png.8e5d5ff58c675a25921155f587ea8f47.png

 

Is there a way to mesh the infinity box even with the rotor and stator passing through it?  and eventually successfully run it in FeMT.

I can send the file as well if that would help.

Apologies if this is a simple issue.

Many Thanks

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Hi,

I checked the model that you send me. The problem come from the coordinate system that you use when you import the device in Flux modeler. You need to create a new coordinate system with shift angle (-30degree) in the z axis (see the attached project).

Other problem that I meet in your project, when I do check geometry, Flux display an error message (the geometry is not correct). When I check, I found that there is a small air gap between some volumes (between the volumes 7,5 and 3, between the volumes 6.4 and 1).

Can you correct the geometry and import it again in the modeler.

Best regards.

altair_test.FLU.zip

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Hi.

Apologies for not fixing the geometry, I thought I saw geometry okay.

I have fixed all the issues as stated. But still struggling to get results in FeMT,

Attached is the fixed model
1-6th_v2.FLU.zip

Best Regards

 

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Many Thanks

This is a different design. In the previous thread i was simply trying to see if i could get a curve out of FeMT with any model, and thus used the example model.

This is the project I aim to get a torque curve for and hopefully understand how to reliably run models in FeMT to get torque curves.

Best Regards

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Hi,

I checked the project that you send me. I found there are some errors in:

  • The electrical circuit, you don’t need to use the inductance in the case you represent the end winding. Also, I delete the inductance that you put in parallel with a current source. I put a resistance instead with a hug value.

  • About the lamination in the stator and rotor. I change also the direction. I put “1” in z axis, this allows to select he lamination direction.

  • Same error in the magnet. You put solid conductor region and you need to put a resistivity in the material.

In the end when I do check physics, I get an error message:

The sliding surface of the mechanical set ROTOR

is not a revolution surface

Concerned face(s): 2 4 8 10 14 16 20 22

The error message means, that you need to separate the moving and fixed part with an air. Can you change the geometry (see the Flux 3D supervisor example, how to create the sliding surface).

Can you make this change on your geometry and solve again the project with FeMT. Before solving try do check physics to be sure that all things are correct.

Keep me informed of this solve the problem. Other thing before solving using FeMT, be sure that you have  enough memory on your computer.

 

Best regards.

Altair_project.FLU.zip

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Many Thanks for the guidance.
I have rectified the issues. but when i check the physics i still get this error.
 


RGCCHC_1 => No coordinate system for region material (1)

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I had to change the geometry and re import my model. so created a new project. taking note of the changes you made by adding a 1 to the 3rd coordinate of the laminated regions and adding resistivity to all the materials. also editing the circuit.

 

Many Thanks

 

image.thumb.png.cab17b2402745d599713e7cfbaebcaf1.png 

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Apologies for the above reply.

I have now been able to get the model into FeMT

But every time it is failing instantly. I have run the model in FeMT from multiple directories with 1GB + free.

The FeMT file is attached

AFPM_V3.2.FEMT.zip

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Thanks for the sharing. one comment about the magnet region, if you want to compute the losses inside you need to use a solid conductor region. the second point, in the case of FeMT you need a lot of memory.

 

I will check and keep you informed.

 

Best regards.

sta98 likes this

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Many Thanks for your reply.

Model attached above has a solid conducting region for the magnets.

I was running the models of the desktop and also a C: Drive of 100GB+ free.

Look forward to your reply.

Best regards

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Have you been able to understand why my FeMT wont run?

 

or does anyone have any advice on making a model run in FeMT.

Best Regards

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Many Thanks,

When i try run the model in Flux in a 10 second solving scenario i get this error.image.png.2a08a307a2d61b6935519fbb38f04ae0.png
 
I guess this could be another reason why the model won't run in FeMT.

What exactly is the error above?

Best Regards

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Hi, I'm just wondering if the simulation was successful and if results where able to achieved from FeMT? and if you could explain how i could get the results from FeMT.

 

Apologies for asking again.

Best Regards

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Sorry to have another post, but I would appreciate the working Flux Project, regardless of the FeMT project.

 

I think you said you had the model run in Flux with zero errors, thus i would appreciate this project sent to me asap.

Appreciate your help with this.

 

Best Regards

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