Coupled inductor magnetizing current

Oscar_Mike619
Oscar_Mike619 Altair Community Member
in Community Q&A

Howdy PSIM users

I am using 3-winding coupled inductors in my model. There are current flags for the winding current which can be plotted, however there is no option to plot the magnetizing current.
I need to plot magnetizing current to look at the current ripple, and verify if my inductor design is correct.
Would appreciate any suggestions.

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Answers

  • VSiddhartha
    VSiddhartha
    Altair Employee

    Hi,

    Are you trying to separate magnetizing current and winding current?

    Thank you,

    Vishwanatha Siddhartha

  • Oscar_Mike619
    Oscar_Mike619 Altair Community Member

    Yes I am trying to separate them for plotting the current waveforms of winding and magnetizing currents.

  • NikosDimitrakopoulos
    NikosDimitrakopoulos
    Altair Employee
    edited March 13

    Dear User,

    If you consider the following equivalent circuit for the coupled inductors:

    image.png

    Did you try to sum the currents measured with the current flags to calculate the magnetizing current [KCL at Lm branch]? I2 and I3 must be multiplied by their corresponding turns ratios. Additionally, depending on how the inductors are connected, you should carefully consider the current directions to determine whether to use a positive or negative sign when adding them.

    Alternative:
    To separate the magnetizing current, you could create a controlled source that replicates the primary voltage. Then set the L2 and L3 part with zero load (I2=0 and I3=0). This open-secondary test ensures that I1 = Im.

    BR,

    Nikos

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