We have studied ways of predicting power losses in soft magnetic laminations for generic time dependence of the periodic magnetic polarization ( ). We found that, whatever the frequency and the induction waveform, the loss behavior can be quantitatively assessed within the theoretical framework of the statistical loss model. The prediction requires a limited set of preemptive experimental data, depending on whether or not the arbitrary ( ) waveform is endowed with local slope inversions (i.e.,

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... inor hysteresis loops) in its periodic time behavior. In the absence of minor loops, such data reduce, for any peak polarization value p , to the loss figures obtained under sinusoidal ( ) at two different frequency values. In the presence of minor loops of semiamplitude m , the two-frequency loss experiment should be carried out for both peak polarization values p and m . Additional knowledge of the quasi-static major loop, to be used for modeling hysteresis loss, does improve the accuracy of the prediction method. A more general approach to loss in soft magnetic laminations is obtained in this way, the only limitation apparently being the onset of skin effect at high frequencies. Index Terms-Eddy currents, magnetic losses, Preisach models of magnetic hysteresis, soft magnetic materials.