Dynamic magnetic characteristics and relaxation of Fe73.5Cu1Nb3Si15.5B7 nanocrystalline alloy under operating temperature and magnetizing frequency
Dynamic magnetic characteristics and relaxation of Fe73.5Cu1Nb3Si15.5B7 nanocrystalline alloy under operating temperature and magnetizing frequency
复制标题
Fe73.5Cu1Nb3Si15.5B7纳米晶合金在工作温度和充磁频率下的动态磁特性及弛豫
DOI：
10.1016/j.jmmm.2017.07.080
复制
发表时间：
2017
影响因子：
2.7
通讯作者：
Wang Xinmin
中科院分区：
文献类型：
--
作者：
He Aina;Yue Shiqiang;Wang Anding;Chang Chuntao;Wang Xinmin
采用ACB-Hloop示踪法和复磁导率法系统研究了退火态Fe 73. 5Cu 1 Nb 3Si 15. 5 B 7纳米晶合金磁芯的动态磁特性随工作温度和磁化频率的变化。研究发现，当电感（B）小于1.1 T时，工作温度低于160 °C对铁损的影响很小。随着B值的增大，在高温下测得的铁损也增大。工频下80 A/m处的带剩磁（Br）随温度的升高均略有下降。此外，磁导率的真实的部分（INF '）随温度的升高先增大后减小。磁导率虚部（INF“）的峰值随工作温度的升高而向高频侧移动。此外，通过Havriliak-Negami（H-N）模型拟合，解释了退火纳米晶磁芯磁导率色散随工作温度升高的变化规律，揭示了温度对磁弛豫时间的影响。
The alternation of dynamic magnetic characteristics with operating temperature and magnetizing frequency in annealed Fe73.5Cu1Nb3Si15.5B7nanocrystalline alloy core was systematically studied by ACB-Hloop tracer and complex permeability approach. It is found that the operating temperature below 160 °C has little influence on core loss when the induction (B) is less than 1.1 T. AsBbecomes higher, core loss measured at higher temperature becomes larger. TheBand remanence (Br) at 80 A/m under power frequency both decline slightly as the temperature goes up. Furthermore, the real part of permeability (μ') increases at first and then decrease with the rise of temperature. The peaks of the imaginary part of permeability (μ'') shift to higher frequency side with decreasingμ'over operating temperature. In addition, the variations of permeability dispersion with the elevated in the operating temperature of the annealed nanocrystalline core are explained by fitting to Havriliak-Negami (H-N) model, revealing that temperature impact on the magnetic relaxation time.