Eddy current in transformer on Flux2D

Flower_974
Flower_974 New Altair Community Member
edited October 2020 in Community Q&A

Hello,

I designed a 1-phase transformer on Flux2D and did an open circuirt test. However, I don't have exactly the expected results for the current (magnitude and phase) in the  stator winding, which I explain by the fact that there is no eddy current in the iron magnetic core. Yet, I indicated the conductivity and the complex relative permeability for the iron. I gave the frequency at the beginning.

I checked the example available on Flux3D with a 3-phase transformer, but there is no current in the magnetic core.

So, my question is how to get the eddy current in the magnetic core in the post-processing. I already tried to put a stranded concuctor coil in the stator core and in the rotor core with a precised current (obtained with the software FEMM),it improved a bit my results but i am not satisfied with it. I also tried to put a resistor in the core but it didn't improve my results.

Thank you in advance.

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Answers

  • asoualmi
    asoualmi
    Altair Employee
    edited June 2020

    Hi,

    If you want to see the eddy current in the magnetic circuit, you need to use a solid conductor region. To do it when you create the face region, select solid conductor region. Also, you need to put a resistivity in the material.

    Best regards.

  • Flower_974
    Flower_974 New Altair Community Member
    edited June 2020

    Hi,

    Thanks for answering me.

    I had already put the resistivity. I have coil conductor region for both windings and I have added solid conductor coils (short-circuit conductor) for the magnetic cores.

    However, the eddy current are higher than expected , especially in the rotor core (the magnitude is doubled) and the phase doesn't match with my results from the software FEMM.

    I think I have to change the mesh. So far, I have only used the automatic mesh. But how do we indicate to the software, that we want triangles whose size equals to δ /5 in order to mesh the face and the lines of the magnectic cores. [δ = skin depth]

    I have read that with FluxD, it's better to use rectangular meshes when there is skin effect and there is a mapped mesh already created but i don't know if it intervenes in the process.

    Best regards.

  • asoualmi
    asoualmi
    Altair Employee
    edited July 2020

    Hi,

    Can you share your Flux project.

     

    Best regards.

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