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《工业仪表与自动化装置》[ISSN:1000-0682/CN:61-1121/TH]

卷:

期数:

2017年01期

页码:

61-63

栏目:

出版日期:

2017-02-15

文章信息/Info

Title:

Leakage Flux Analysis of Toroidal Core with Circular Cross Section for High-frequency Electronic Circuits

文章编号:

1000-0682（2017）01-0000-00

作者:

田 莉

（兰州交通大学 自动化与电气工程学院，甘肃 兰州 730070）

Author(s):

TIAN Li

（School of Automation and Electrical engineering，Lanzhou Jiaotong University，Gansu Lanzhou 730070，China）

关键词:

环形磁芯; 电场强度; 磁场强度; 漏磁

Keywords:

toroidal core; electrical field intensity; magnetic field intensity; leakage flux

分类号:

TM15

DOI:

-

文献标志码:

A

摘要:

环形磁芯在高频电子电路中大量使用，当线圈绕于磁芯部分表面，而磁芯磁导率不是很高时，磁芯中的漏磁不容忽视。该文基于麦克斯韦方程组得到的圆形截面环形磁芯中电场强度和磁场强度的解析计算公式，详细研究了漏磁随频率、磁导率、及绕组分布的变化，计算结果表明漏磁随着频率的增加而增加，随着磁导率的增加而减小，当磁导率很高或线圈均匀分布于磁芯表面时，漏磁很小，可以忽略。

Abstract:

The toroidal core has been used in large scale in high-frequency electronic circuits. When coil is wound on the partial surface of the core and magnetic permeability of core is not very high, the leakage fluxes in magnetic core can’t be ignored. In this paper, based on the analytical formulas of electric field strength and magnetic field strength in the circular-section magnetic core obtained by Maxwell equations, the change of leakage fluxes with the frequency, permeability and winding distribution is studied in detail. The calculated results show that the leakage flux increases with the increase of frequency and decreases with the increase of magnetic permeability. When the magnetic permeability is high or coil evenly distributed on the core surface, the leakage flux is small and can be ignored.

参考文献/References:

[1] 王兆安，张明勋.电力电子设备设计和应用手册[M].北京：机械工业出版社, 2002. [2] 田莉，田铭兴.高频电子电路用圆形截面环形磁芯中电磁场的分布[J].电工电能新技术，2014，10(4): 33-38 [3] William G Hurley , David J Wilcox. Calculation of leakage inductance in transformer windings[J]. IEEE Transactions on Power Electronics, 1994, 9(1): 121-126.

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备注/Memo

备注/Memo:

收稿日期：2016-06-14 作者简介：田莉

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