Theoretical analysis of the electrical and magnetic field distributions in a toroidal core with circular cross section
Theoretical analysis of the electrical and magnetic field distributions in a toroidal core with circular cross section
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圆形截面环形磁芯电场和磁场分布的理论分析
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发表时间：
1999
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通讯作者：
C. F. Foo
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作者：
Daming Zhang;C. F. Foo
随着高频磁性元件的快速发展，了解铁氧体磁芯中电场和磁场的分布变得非常重要。本文给出了一种用于分析环形磁芯中电场和磁场分布的改进模型。为磁芯铁损的理论分析提供依据，有助于评价实验结果。根据计算结果，我们发现电场引起的涡流和位移电流产生的磁场会屏蔽铁芯横截面内部的磁通。这会产生类似于绕组导体中的趋肤效应的磁通趋肤效应。当频率增加时，这种现象变得更加明显。
With the rapid development of high-frequency magnetic components, it is important to know the distributions of the electrical and magnetic fields in the ferrimagnetic cores. In this paper, an improved model for analyzing the distributions of electrical and magnetic fields in a toroidal core is given. It supplies the basis for the theoretical analysis of the iron loss in the magnetic cores, which is helpful in evaluating experimental results. On the basis of calculated results, we find that the magnetic field produced by the eddy current and displacement current due to the electrical field will shield the magnetic flux from the inner portion of the core cross section. This results in a flux skin effect analogous to the skin effect in the conductors of a winding. This phenomenon becomes more obvious when frequency increases.