FeSiBCuNb纳米晶共模电感铁芯成分及性能研究

Study on Composition and Performance of the Inductor Cores with FeSiBCuNb Nanocrystalline Common Mode

为获得磁性能满足要求的共模电感铁芯,该文在纳米晶软磁合金Finemet(Fe_(73.5)Si_(13.5)B_9Cu_1Nb_3)的基础上,通过调节合金成分和选择适当的热处理工艺,成功制备出两种成分的磁性能均满足要求的共模电感铁芯,并分析了纳米晶带材中合金成分的微量变化对合金晶化温度和不同频率下的电感值的影响。结果表明,用成分为Fe_(72.75)Si_(15.8)B_(7.3)Cu_(1.05)Nb_(3.1)的带材卷绕的磁芯经过热处理后,其电感值在低频和高频条件下均能满足共模电感产品对磁芯的要求;用成分为Fe_(72)Si_(15.8)B_(8.2)Cu_1Nb_3的带材卷绕的磁芯经过热处理后,其在低频条件下的电感值远远超出标准值,将该成分的合金带材磁芯应用于共模电感产品时,其性能表现良好。

The objective of this study is to obtain common mode inductor cores which meet the magnetic properties standard.Based on the nanocrystalline soft magnetic alloy Finemet（Fe73.5Si13.5B9Cu1Nb3）,two type of common mode inductor cores with satisfactory magnetic properties have been successfully fabricated by adjusting the alloy composition and selecting the appropriate heat treatment process,besides,the influence of micro change of alloy composition on the crystallization temperature and inductance value at different frequencies is also analyzed.The results show that the inductance under low and high frequency of cores made by Fe72.75Si15.8B7.3Cu1.05Nb3.1 alloy wholly meet there quirement of common mode inductors.The inductance of cores made by Fe72Si15.8B8.2Cu1Nb3 alloy highly exceed the standard of common mode inductors under low frequency,and it shows qualifi ed performance in the practical use of common mode inductors.