Re: frequency vs core saturation

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 11:52 PM 4/5/2007, Tesla list wrote:
> Original poster: "Scott Bogard" <teslas-intern@xxxxxxxxxxx>
>
> Hey all,
>     Here is a question for all you mathy theoretical technical 
> guys.  I heard In physics class tonight, that if you use a higher 
> frequency you can use a smaller core for a transformer.

Yes, but.....

increasing the frequency will generally increase losses:
1) winding/copper losses because of skin effect (depending on size of 
the wire, etc.)
2) core losses (eddy currents in the core..) higher frequencies need 
thinner laminations

But this is why aircraft have historically used 400Hz AC supplies... 
much smaller transformers