Soft magnetic characteristics of laminated magnetic block cores assembled with a high Bs nanocrystalline alloy

摘要

This paper focuses on an evaluation of core losses in laminated magnetic block cores assembled with a high B s nanocrystalline alloy in high magnetic flux density region. To discuss the soft magnetic properties of the high B s block cores, the comparison with amorphous (SA1) block cores is also performed. In the high B s block core, both low core losses and high saturation flux densities B s are satisfied in the low frequency region. Furthermore, in the laminated block core made of the high B s alloy, the rate of increase of iron losses as a function of the magnetic flux density remains small up to around 1.6 T, which cannot be realized in conventional laminated block cores based on amorphous alloy. The block core made of the high B s alloy exhibits comparable core loss with that of amorphous alloy core in the high-frequency region. Thus, it is expected that this laminated high B s block core can achieve low core losses and high saturation flux densities in the high-frequency region.