基于Ansys Maxwell的气隙边缘效应对电感参数的影响

Influence of Air Gap Edge Effect on Inductor Parameters Based on Ansys Maxwell

鉴于气隙对高频磁性元器件的电气参数影响较大,本文建立应用于Boost电路的电感器模型,采用Ansys Maxwell有限元分析,研究了气隙电感气隙长度与布置对电感量与磁场强度分布的影响。结果表明:磁芯中添加合适的气隙,可以降低磁芯的磁密,增强其抗饱和能力,电感量有所下降。通过对比不同开气隙结构的磁芯模型,可以选用中、边柱底部开气隙的磁芯结构进行Boost电感设计,但需结合实际测试进行评估确定。

Based on the great influence of air gap on the electrical parameters of highfrequency magnetic components,an inductor model applied to Boost circuit is established in this paper.By using Ansys Maxwell finite element analysis,the influence of air gap length and layout of air gap inductors on the distribution of inductance and magnetic field strength is studied.The results indicate that an appropriate air gap in the magnetic core can reduce the magnetic density of the magnetic core,enhance its antisaturation ability,while reduce the inductance.By comparing the magnetic core models with different air gap structures,the core structure with bottom air gap both middle and side column could be selected for Boost inductance design,but it needs to be evaluated and confirmed by practical test.