Magnetostriction of Fe-4.5% Si and Fe-13% Al powder compressed cores which have been widely used for reactors in PCS and electrical vehicles were measured for the first time with a home-made set-up. Using a low pass filter was indispensible because of...
Magnetostriction of Fe-4.5% Si and Fe-13% Al powder compressed cores which have been widely used for reactors in PCS and electrical vehicles were measured for the first time with a home-made set-up. Using a low pass filter was indispensible because of 60 Hz line noise, which could be filtered effectively with a cutoff frequency lower than 20 Hz. The magnetostrictions of the Fe-4.5% Si and Fe-13% Al block core were 3.5 and 22 ppm, respectively, under a maximum applied field of 200 Oe. The saturation magnetostriction of single crystalline Fe-4.5% Si alloy calculated from the measured value was coincident with the reported. Also it was inferred that the acoustic noise of the powder compressed cores would be much lower than the expected because magnetostriction of the powder cores were much lower than commercialized Fe-Si electrical steels.