Where is the iron core transformer in multisim 12.0

[Sammy1986]

I am instructed to use the  IRON_CORE_XFORMER , from line tranformers however i can't find that anywhere in multisim 12.0.

The instructor has designed his circuit using 11.0 and also can't find the 11.0 version of multisiim.

Please let me know if you can help

Thank you

[derekdb]

Hi,

That component was removed from the Multisim 12 database. However, you can replicate that model in Multisim 12 by creating your customized component following the steps shown in this tutorial: https://decibel.ni.com/content/groups/circuit/blog/2011/05/24/create-a-component-part-2-using-the-mo...

The SPICE model of the IRON_CORE_XFORMER was copied in the attachment.

Sorry for the inconvenience.

[OStep]

Hi Sammy,

We actually revamped the transformer components in the database for V12 of Multisim. Part of this revamping was the obsoletion and removal of certain components, including this one. 

If you go into the Basic/Transformers family, you may notice a whole slew of new components with different winding configurations. These components also contain an unituitive user interface to allow you to customize the essential characteristics of a transformer (including parasitics).

However, these transformers abstract away the actual details of how the model is created. If your (or your Instructor's) goal is to model transformers using concepts of magnetic circuits, we still have the building blocks for this. In the Basic/Basic_Virtual family you'll find two handy components:

-CORELESS_COIL_VIRTUAL (coil and MMF generator)

-MAGNETIC_CORE_VIRTUAL (magnetic core - essentially allows you to model a non-linear B-H curve)

CORELESS_COIL_VIRTUAL contains practically the same model as IRON_CORE_XFORMER. The only differences between the two components are that IRON_CORE_XFORMER contains a 1ohm series resistor and that the symbols are different (IRON_CORE_XFORMER is practically incomprehensible - you can't even tell which side is the coil (electrical) and which side is the MMF generator (magnetic)).    

I have attached a screen shot and the circuit to show the comparison between the models. The upper model of the 2-winding transformer is mathematically identical to the lower model.

Let me know if there are still issues.

Thanks

[OStep]

I'd like to make a correction to my reply just above.

Where I say "These components also contain an unituitive user interface", I mean to say "These components also contain an intuitive user interface"