Abstract This paper focuses on the phenomenon of the magnetic flux density dispersion Bd on the gaps of the Fe73.5Cu1Nb3Si13.5B9 multi-gap nanocrystalline block core. Present state-of-the-art shows, that there is no comprehensive knowledge about the value of the magnetic flux density dispersion Bd on the gaps of nanocrystalline block core and the possibilities of its minimisation. The magnetic flux density dispersion Bd is the source of local eddy currents, which are the cause of increase of power loss and temperature in the chokes’ core. To discuss the effect of gap width and the method of its filling on the power losses in the core, the comparison between inserts of Teflon and magnetic mat composed of 70% Fe53.9Co29.1B13Nb1Si2Cu1 powder with a fraction of 20–36 µm and 30% Ultimeg epoxy resin 2004L was performed.

中文翻译：

---

FeSiBNbCu软磁纳米晶块磁芯间隙磁通密度色散B的研究

摘要 本文重点研究了Fe73.5Cu1Nb3Si13.5B9多间隙纳米晶块铁芯间隙中磁通密度色散Bd现象。目前的最新技术表明，没有关于纳米晶块芯间隙上的磁通密度色散 Bd 值及其最小化可能性的全面知识。磁通密度离散 Bd 是局部涡流的来源，这是导致扼流圈磁芯中功率损耗和温度增加的原因。为了讨论间隙宽度及其填充方法对磁芯中功率损耗的影响，特氟龙嵌件与由 70% Fe53.9Co29.1B13Nb1Si2Cu1 粉末组成的磁垫之间的比较，其分数为 20–36 µm 和 30 % Ultimeg 环氧树脂 2004L 进行。