论文信息 - POWER LOSSES IN MAGNETIC LAMINATIONS WITH HYSTERESIS : FINITE ELEMENT MODELING AND EXPERIMENTAL VALIDATION

POWER LOSSES IN MAGNETIC LAMINATIONS WITH HYSTERESIS : FINITE ELEMENT MODELING AND EXPERIMENTAL VALIDATION

Dynamic hysteresis loop shapes and magnetic power losses are studied in nonoriented Fe-Si laminations exhibiting significant excess losses. Measurements are carried out under controlled sinusoidal induction in the frequency range from 1 Hz to 1.6 kHz, at various peak inductions from 0.25 to 1.5 T. Excess losses are found to obey a f3/2 law up to frequencies of 200–400 Hz, depending on peak induction. Beyond this limit, definite deviations are observed, due to eddy current shielding. Detailed information on the flux and field distribution in this high frequency regime is obtained by finite element solutions of Maxwell equations employing the dynamic Preisach model to describe quasi-static hysteresis and dynamic wall processes. The agreement between theoretical predictions and measurements is discussed.

[1] Afef Kedous-Lebouc,et al. Magnetic flux and losses computation in electrical laminations , 1996 .

[2] Maurizio Repetto,et al. Power losses in thick steel laminations with hysteresis , 1996 .

[3] Laure-Line Rouve,et al. Application of Preisach model to grain oriented steels: comparison of different characterizations for the Preisach function p(/spl alpha/, /spl beta/) , 1995 .

[4] L. Dupré,et al. Magneto-dynamic field computation using a rate-dependent Preisach model , 1994 .

[5] D. Fruchart,et al. Magnetic properties of FeRhP: Influence of metallic clusters on ferromagnetism , 1994 .

[6] G. Bertotti. General properties of power losses in soft ferromagnetic materials , 1988 .

[7] G. Kádár,et al. On the Preisach function of ferromagnetic hysteresis , 1987 .