How do I calculate eddy current losses in mains transformers?

AI Thread Summary
Calculating eddy current losses in 50Hz mains transformers involves understanding the impact of lamination sizes on these losses. The original poster seeks relative figures for comparison rather than precise calculations. They express difficulty in finding accessible information beyond an electrical degree level. A suggested resource is a link discussing transformer use at non-design frequencies. The discussion highlights the challenge of obtaining straightforward calculations for eddy current losses.
bootsnbraces
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Hi all i hope some one can help but i have a feeling there will be no easy calculations for this one:confused:
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
 
Physics news on Phys.org
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...

using_a_power_transformer_at_a_frequency_it_wasn_t_designed_for_equation_2.jpg
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
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