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Homework Help: Deriving the circuit approximation of a magnetic circuit

  1. Jun 1, 2016 #1


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    1. The problem statement, all variables and given/known data

    For the magnetic circuit:
    Derive the circuit approximation.
    Compute all magnetic fluxes if the total solenoid current is I.

    2. Relevant equations

    Rm = L / μS

    3. The attempt at a solution

    Mostly, right now, I'm just trying to determine the magnetic circuit equivalent. From there it seems like simple circuit analysis. (Note that in my recreation of the diagram, I failed to add in the small L5 annotated at the top right of the larger subcircuit).

    Is my intuition correct in treating the different media as a parallel of three resistances? This one is a bit strange, I can't find any solid worked examples of this type with differing media.

    edit: The two resistances Rg1 and Rg2 represent the air-gap.
  2. jcsd
  3. Jun 6, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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