Abstract
Soft magnetic properties of block cores comprising Febal.Cu1Mo0.2Si4B14 nanocrystalline alloy ribbons (HBN core) were investigated. The HBN core shows a magnetic flux density at 2000 A/m (B2000) of 1.73 T, which is about 0.2 T higher than that of the core comprising Fe-based amorphous alloy ribbons (Fe-AM core). The core loss at 200 mT and 10 kHz is 8.5 W/kg, two thirds of that of the Fe-AM core. The coefficient of the excess eddy current loss for the HBN core is one half of that of the Fe-AM core; the difference in core loss is prominent at higher frequencies.
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