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。
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.
出处
《工业仪表与自动化装置》
2017年第1期61-63,67,共4页
Industrial Instrumentation & Automation
关键词
环形磁芯
电场强度
磁场强度
漏磁
toroidal core
electrical field intensity
magnetic field intensity
leakage flux
