摘要
在 f=2 0～ 10 3kHz和Bm =0 0 5 ～ 1 0T的范围内 ,考查了低Br 纳米晶合金的每周损耗的频率关系。结果表明 ,在 0 2 ～ 5kHz的范围内 ,惯用的损耗分离原则适用 ,可用Bertotti的统计理论描述P/ f - f行为。大约在 3～ 5kHz以前的相当宽的中、高频区内 ,不能采用惯用的分离法。大致可分为三个区间 ,P/ f- f行为可很好地用P/ f=K(i)eclf +P(i)eh 型线性方程来描述。有效涡流系数K(i)ecl 比经典涡流系数Kcl小得多 ,也明显比高导磁态的K(i)ecl
In the range of f =0 2～10 3kHz and B m=0 05～1 0T,the frequency dependence of the total power loss per cycle has been investigated for the nanocrystalline alloy with low B r The results show that the principle of loss decomposition used consistently is applicable and the behavior of P/f vs f can be described by using Bertotti's statistical theory in the range of 0 2～5kHz In the considerable wide medium and high frequency range about above 3～5kHz,the habitual method of loss separation is not applicable This wide interval can be approximately divided into three intervals,in which the behavior of P/f vs f can be well described by linear equation K (i) ecl f+P (i) eh The effective eddy current coefficient K (i) ecl is much smaller than the corresponding classical eddy current coefficient K cl ,and also is clearly smaller than the corresponding K (i) ecl for the high permeability state
出处
《金属功能材料》
CAS
2001年第5期18-24,共7页
Metallic Functional Materials
基金
国家非晶微晶合金工程技术研究中心资助
关键词
纳米晶合金
有效涡流损耗
有效磁滞损耗
磁导率
变压器
nanocrystalline alloy with low B r,effective eddy curren loss,effective hystersis loss
