Transformer Equivalent circuits

[ibriggsy]

Im doing a piece of coursework on equivalent circuits and have worked out the circuit but i have forgotten how to work out the core resistance and left my formula sheet at uni.
If anyone could help with the formula that would be great.
Cheers Ian

 

[rattus]

Re: Transformer Equivalent circuits

Ian, you ask some tough questions. I am fuzzy on this,but it relates to the integral of the BH curve or hysteresis loop. Not sure I ever had to do it though. As for eddy current losses, there may be some empirical formula for that, but to my knowledge, there is no formula based on the properties of the iron. Maybe I will look that up after my nap.