高Br纳米晶Fe73Cu1Nb2V1.5Si13.5B9合金的铁损行为(I)低频损耗行为

在f=10-3×103Hz和Bm=0.1-1.0T范围内,研究了高Br纳米晶Fe73Cu1Nb2V1.5Si13.5B9合金的每周总损耗和频率的关系.P/f对f的行为明显地呈现非线性.大约在200Hz以下的范围内,非线性特征特别明显.用损耗统计理论中的"磁体"的行为能相当好地描述这种非线性行为.在较低的频段内,活动的磁体数n和动态过剩场Hexc是线性相关的,而在较宽和较高频段内,n与Hexc的关系是非线性的.

Behavior of core loss in nanocrystalline Fe73Cu1Nb2V1.5Si13.5B9 alloy with high Br (I) Behavior of low- frequency loss

In the ranges of f=10- 3× 103Hz and Bm=0.1- 1.0T, the dependence of total core loss per cycle P/f on frequency f was investigated for nanocrystalline Fe73Cu1Nb2V1.5Si13.5B9 alloy with high Br. The behavior of P/f vs f exhibits clearly non- linearity. The non- linearity is obvious in the range below about 200Hz. The non- linear behavior can considerably well be described in terms of the behavior of the simultaneously active" Magnetic Object" (MO) in the statistical theory of power loss. In the lower frequency segment, the number n of the active MOs is near- linearly associated with the dynamic excess field Hexc, whereas the dependence of n on Hexc clearly exhibits non- linearity in the wider and higher frequency segment.