Re: [femm] Inductances in electrical transformers

[Fabio <fmilanesi@xxxxxx>]

Keith Gregory wrote:
> 
> Fabio,
> 
> Just a suggestion but if you are setting the primary current to 10A
> (equivalent to 45.45 mA) and you have a turns ratio of 220/117 then try
> setting the secondary current to 10x220/117 =18.8A (equivalent to 160.7mA)
> and see what happens.
> 
> In addition, I am not clear as to why you would want an air-gap. In a
> voltage transformer it would just increase the losses.
> 
> Keith.

Keith,
thanks for your suggestion. 
I added a small gap just to be sure that the effect of core nonlinearity
was negligible.
I think that the problem is not in secondary current because i changed
it without difference in result.
And when i evaluate mutual inductance i set I1=10 and I2=0.
Probably i make an error evaluating M , Ls1 and Ls2 are ok.