How can I model a gapped magnetic core?

[raport_maker]

I am testing the trial version of Multisim Power Pro, and I have been trying to model a iron core with the air gap. Could I only enter, point by point, the hysteresis loop which already consider a gap, or there is a part which has such parameter as gap? I am also wondering if full version has such ability and what exactly defines parameter "Input smoothing domain" in Magnetic Core part property window? How can I model a gapped magnetic core?

[OStep]

Hi,

Unfortunately there's presently no gap parameter. But there are a couple of ways of modeling its equivalent effect, depending on what data you have and what your end needs are. I can help you with that.

Do you know the permeability of the core material? 

Do you care to simulate non-linear behavior?

[raport_maker]

Permeability is 8000H/m and I must consider in my simultaltion non-linear behaviour. So far, I've calculated new points of B-H characteristic, which considers a gap. But I'm still wondering, what defines "Input smoting domain" parameter?

[OStep · Accepted solution]

It is a measure of the smoothing that will be introduced around the data points that define your B-H curve. Its purpose is to smooth out the otherwise piece-wise-linear B-H curve. This potentially helps makes the defined curve more representative of the true curve and also helps the simulator converge.