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Prediction of Magnetic Losses in FeSiNO Sheets in Unidirectional Alternating Field and Rotating Field

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This article presents a measurement and a theoretical determination of magnetic losses in the ferromagnetic non oriented iron silicon sheets (FeSiNO), in unidirectional alternating field and rotating field. The theoretical prediction of the magnetic losses is obtained by using three analytical models Model 1 and Model 2 in unidirectional alternating field and Model 3 in rotating field. In order to take into account the harmonics of the magnetic induction waveform, the three models are based on the variation speed of magnetic induction dB/dt that has a direct dependency of the loss due to the domain wall motion. In addition, using physical parameters of the material, the Model 1 allows the separation of magnetic losses. These parameters are determined experimentally in order to take into account the nonlinearity of the material. Analytical magnetic losses obtained with the three models are consistent with experimental magnetic losses. Rotating magnetic losses are approximated by alternating twice the magnetic losses, to the same maximum magnetic induction and to the same frequency.
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Ferromagnetic Sheets FeSiNO; Magnetic Losses; Unidirectional Alternating Field; Rotating Field; Variation Speed of Magnetic Induction dB/dt

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