Iron losses in soft magnetic materials under periodic non-sinusoidal supply conditions

The paper investigates the role of low- and high-order harmonics, superpose d to a 50 Hz fundamental magnetic flux density waveform, on iron losses in NO Fe-Si laminations. The effect on the fundamental contributions of the lo sses (classical and hysteresis + excess items) is evaluated by means of a c ombined finite element - dynamic hysteresis model of the ferromagnetic shee t. A comparison with the prediction of the statistical theory of losses is finally presented and discussed. (C) 2000 Elsevier Science B.V. All rights reserved.