How can I determine the inductance value that matches the exact value for a bar conductor?

Sam Adik
Sam Adik Altair Community Member
edited October 2023 in Community Q&A

 Hello Altair community ,

I have simulated an aluminum conductor bar as shown in the attachment, powered by a low current source at a frequency of 60Hz similar to the circuit in the attachment. However, the inductance value is consistently lower than the  exact value. Can anyone please help me with this?

 

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Answers

  • C_Favre
    C_Favre
    Altair Employee
    edited October 2023

    Hello,

    In case of a solid bar in air, you can compute the inductance using the energy in the domain using the following formula:

    E=0.5*L *IRMS²

    The energy (E) in the domain can be computed using the menu Computation -> On physical entity -> Compute

    In the new windows click on Region, choose the spatial group as  1_Domain and select Energy.

    After that you can extract the inductance L from the previous formula.

    I hope this helps.

    Best regards.

    Cyril Favre

  • Neo Li
    Neo Li
    Altair Employee
    edited October 2023

    Add some comments,

    When it comes to inductance calculation, there might be two ways to value it.

    one from the energy side, E=0.5*L*Irms^2, so the enough space or study domain area should contain the emag enery to value the proper inductance.

    the other way is from the circuit formula, Z=R+j*omega*L, if the current source is with 0° phase, then the image part of the voltage cross the conducting part is all contributed by the indutance, image(U(soild_conduct))=omega*L*Irms.

    best regards,

    Chenxi

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