Liu, "Estimation of eddy-current loss
in permanent magnets of electric motors using network-field coupled multislice time-stepping finite-element method," IEEE Transactions on Magnetics, vol.
5), eddy-current loss
of unit mass is expressed as Eq.
The model in  can well modify the eddy-current loss
in the silicon substrate, while the T-model in  has been proposed to accurately simulate the broadband characteristics of spiral inductors.
Sullivan, "Simplified high-accuracy calculation of eddy-current loss
in round-wire windings," Power Electronics Specialists Conference, 873-879, Aachen, Germany, 2004.
Iron loss consists of the hysteresis loss and eddy-current loss.
The eddy-current loss density of the yoke is expressed as 
Fukushima, "Effect of eddy-current loss reduction by magnet segmentation in synchronous motors with concentrated windings," IEEE Transactions on Industry Applications, Vol.
Mizokami, "Reduction of magnet eddy-current loss in interior permanent-magnet motors with concentrated windings," IEEE Transactions on Industry Applications, Vol.