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Inductor DCR

Mamarts

How to determind the DCR value for my Inductor?

  • Dear Mamarts,

    Mamarts said:
    How to determind the DCR value for my Inductor?

    Pull your inductor out of this schematic and place it in a circuit between a current source and ground with the node between the current source and your inductor labeled VZ. Set the opposite node of the current source to ground. Set the current to 1 A AC with a DC value of 0 and perform a small signal AC analysis over the frequency range over which you want to examine the real part of the inductor. When the simulation completes, and assuming thre inductor is NOT and ideal inductor, create the expression real(v("/VZ")) and plot or ppint the result. This is an expression for the real impedance of your inductor since the AC current value is set to 1 and its phase is 0. Extrapolate the low frequency value to a DC value to estimate its DCR.

    I hope my explnantion makes some sense to you Mamarts!

    Shawn

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