How do I calculate eddy current losses in mains transformers?

[bootsnbraces]

Hi all i hope some one can help but i have a feeling there will be no easy calculations for this one
Im trying to calculate actual eddy current losses in 50hz mains transformers depending on lamination sizes and can't seem to find any info on the subject that's sub electrical degree level. I am not looking to produce figures accurate to a milliwatt just relative numbers for comparison purposes

Can anyone help?
Thanks in advance
Harry

 

[CWatters]

I've long since forgotten how to do this but google found...

http://www.edn.com/design/component...sformer-at-a-frequency-it-wasn-t-designed-for

See...