Create Variable Inductance in SPICE

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Creating a variable inductance in SPICE, particularly in NI Multisim, involves using a polynomial voltage-controlled current source in parallel with a standard inductor (L0). The challenge lies in determining the appropriate coefficients for the current source to accurately model the desired inductance behavior. For those aiming to replicate a specific saturable inductor, measuring and curve fitting the inductor's characteristics is essential. Resources like the provided PDF can offer additional guidance on the implementation. Proper configuration can lead to successful modeling of variable inductance in simulation environments.
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I'm trying to create a variable inductance in SPICE, specifically in NI Multisim. What I'm trying to do is create a saturable inductor. I need an inductor that changes it's inductance with current. Multisim does have a "virtual" inductor that you can create a inductance function with but I can't really get it to work and I used NI but their help isn't that great either.


Has any created a variable inductor or a saturable inductor in some sort of a SPICE program (or Multisim)?

Any help is greatly appreicated. Thanks!
 
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It's pretty easy. You just put a polynomial voltage controlled current source in parallel with the L0.

The trick is, what do you set the coefficients to. If you're trying to match an actual particular inductor, you're probably going to have to measure and curve fit it.

See page 2 of this PDF.
http://www.intusoft.com/articles/inductor.pdf
 

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