Re: [femm] Inductances in electrical transformers

["Fabio" <fmilanesi@xxxxxx>]

----- Original Message ----- 
From: "David Meeker" <dmeeker@xxxxxxxx>
To: <femm@xxxxxxxxxxxxxxx>
Sent: Wednesday, November 27, 2002 5:53 AM
Subject: Re: [femm] Inductances in electrical transformers
> >
> You're using the wrong area for a2--this is probably ambiguous the way 
> that I've written it up in the manual. This area is meant to be the 
> cross-section of the coil such that the current density in bulk coil 2 
> is: J2 = n2*i2/a2. Looking at your geometry, the a2 area should be 9 
> mm * 61 mm, or 549 mm^2. You've used twice that area, so you calculated 
> exactly half the coupling factor that you should be getting.
> 
> Dave.
> 
>
Thanks Dave, 
now i get good results.
Best regards 
Fabio