"The problem must not have circuit with MD3TWOM, MD3SCA formulations"

Will_20672

I'm trying to use non-meshed coils and I'm running into this error when I try to solve.

Under the electrical tab for the coil editor, I have associated an electrical component from the circuit for both coils. I don't have any coils that don't have an associated electrical component, or any electrical components without an associated coil.

Does anyone know how to solve this?

Lavanya Vadamodala_20519

Will_20672 said:

I tried that, and I now get the error:

The problem must not have circuit with MD3TWOM, MD3SCA formulations.
Use these formulations without circuit.

Does the circuit look right?

Hi Will,

I overlooked one thing. The issue is due to the no infinite box in the model.

Without an infinite box, you will not have any boundary conditions in the model.

Please use the original circuit as you initially had.

Create an infinite box and solve your model. You will not see any errors.

Thank you,

Lavanya

Lavanya Vadamodala_20519

Hi Will,

In the application formulation model, do you have "Automatic formulations"?

Can you send me a screenshot of the application definition and coil, circuit definitions?

Thank you,

Lavanya

Will_20672

Lavanya Vadamodala_20519 said:

Hi Will,

In the application formulation model, do you have "Automatic formulations"?

Can you send me a screenshot of the application definition and coil, circuit definitions?

Thank you,

Lavanya

Yes, it's set to automatic formulations.

Lavanya Vadamodala_20519

Will_20672 said:

Yes, it's set to automatic formulations.

Can you share the model?

Also, why do you have two ground terminals?

Will_20672

Lavanya Vadamodala_20519 said:

Can you share the model?

Also, why do you have two ground terminals?

Well I have two separate circuits, so each one needs a ground right?

I attached the flux file.

Lavanya Vadamodala_20519

Will_20672 said:

Well I have two separate circuits, so each one needs a ground right?

I attached the flux file.

The issue comes from the Insulation region, which is defined as the Solid conductor region.

You have it defined as a solid conductor region but there is no solid conductor in the circuit, and the direction of current flow is not assigned. Define it as an open circuit solid conductor by separately connecting it in series with high resistance.

Will_20672

Lavanya Vadamodala_20519 said:

The issue comes from the Insulation region, which is defined as the Solid conductor region.

You have it defined as a solid conductor region but there is no solid conductor in the circuit, and the direction of current flow is not assigned. Define it as an open circuit solid conductor by separately connecting it in series with high resistance.

I tried that, and I now get the error:

The problem must not have circuit with MD3TWOM, MD3SCA formulations.
Use these formulations without circuit.

Does the circuit look right?

Lavanya Vadamodala_20519

Will_20672 said:

I tried that, and I now get the error:

The problem must not have circuit with MD3TWOM, MD3SCA formulations.
Use these formulations without circuit.

Does the circuit look right?

Hi Will,

I overlooked one thing. The issue is due to the no infinite box in the model.

Without an infinite box, you will not have any boundary conditions in the model.

Please use the original circuit as you initially had.

Create an infinite box and solve your model. You will not see any errors.

Thank you,

Lavanya

Will_20672

Lavanya Vadamodala_20519 said:

Hi Will,

I overlooked one thing. The issue is due to the no infinite box in the model.

Without an infinite box, you will not have any boundary conditions in the model.

Please use the original circuit as you initially had.

Create an infinite box and solve your model. You will not see any errors.

Thank you,

Lavanya

Thanks for the help, I tried using an infinite box and now I get the error:

"Impossible to solve problem"

I might have set up the infinite box wrong as I'm not really sure how it's supposed to work, the documentation on it is not very clear to me.

I attached the current file.

 

Lavanya Vadamodala_20519

Will_20672 said:

Thanks for the help, I tried using an infinite box and now I get the error:

"Impossible to solve problem"

I might have set up the infinite box wrong as I'm not really sure how it's supposed to work, the documentation on it is not very clear to me.

I attached the current file.

 

I shared the model, which was solved from my side.

I changed the circuit, but you can change it to the initial circuit you have.

Will_20672

Lavanya Vadamodala_20519 said:

I shared the model, which was solved from my side.

I changed the circuit, but you can change it to the initial circuit you have.

Thank you, but it seems that you're using a newer version of Flux. I'm on 2020.1

Is there a way to convert the file to an older version?

EDIT: Never mind, the infinite box did fix the issue but somehow I created some volumes by accident that didn't have a region assigned which was preventing it from solving.