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Loss separation in soft magnetic composites
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Energy loss vs frequency measured at peak polarization values J p = 0.5, 1.0, and 1.25 T in the type A soft magnetic composite (δ = 7450 kg/m3). The results are obtained on two ring samples of cross-sectional areas S1 = 5 × 5 mm2 and S2 = 2.5 × 2.5 mm2, respectively.

Image of FIG. 2.
FIG. 2.

Micrograph for the type B SMC. The classical eddy current loss component W cl(f) is calculated assimilating this structure with an array of rectangular grains.

Image of FIG. 3.
FIG. 3.

(Color online) DC-10 kHz loss separation at J p = 1.0 T in the SMC type A. The energy loss W(f) (open symbols) is measured under controlled sinusoidal flux. The continuous fitting line is obtained by adding to the experimental hysteresis loss W hyst the classical loss W cl(f), calculated through finite elements calculation and the excess loss W exc(f), given by Eq. (1).

Image of FIG. 4.
FIG. 4.

(Color online) Same as Fig. 3 for the SMC type B.

Image of FIG. 5.
FIG. 5.

(Color online) Number of active magnetic objects n vs the excess field H exc = W exc/4J p at J p = 1.0 T in the two investigated SMCs. The straight lines provides best fitting with the predicted relationship n = n 0 + H exc/V o.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Loss separation in soft magnetic composites