高频电感气隙布置与绕组损耗的分析

Air-gap Arrangement & Winding Loss Analysis for High-frequency Inductors

针对高频电感的绕组损耗问题,利用有限元数值分析,研究了气隙位置的变化对电感器绕组损耗的影响,比较了不均匀分布气隙与均匀分布气隙对绕组损耗的影响,并对分布气隙参数提出了合理的设计原则.结果表明：气隙位置开在拐角处会增加绕组损耗.相对于不均匀分布气隙,均匀分布气隙有利于减小绕组损耗,且可以将分布气隙个数增加到使绕组距气隙的避让距离控制在3～5个气隙距之间,同时分布气隙间磁柱的长度大于6个气隙距,以得到较小的绕组损耗.

For the research of winding loss in high frequency inductance, the paper uses finite element analysis to analyze the effect of the air- gap position in core leg on the winding losses, compares the effect of the non-uniform distributed air-gap and uniform distributed air- gap on the winding losses, and proposes reasonable design principles for distributed air-gap parameters. The results show that the air- gap in core comer will increase winding losses. In comparison with non-uniform distributed air-gap, uniform distributed air-gap is favorable for the reduction of winding losses. The number of air gaps should be selected between three to five times of gap Length, meanwhile if the length of magnetic core between distributed air gaps is greater than six times of the gap length, it is able to reduce winding losses.