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Re: frequency vs core saturation



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