共模扼流圈饱和效应分析及动态电感计算  

Saturation Effect Analysis and Dynamic Inductance Calculation of Common Mode Choke

作　　者：黄华高[1] 陈恒林[1] 孟培培[1] 钱照明[1] 

机构地区：[1]浙江大学,浙江杭州310027

出　　处：《电力电子技术》2010年第8期102-104,共3页Power Electronics

基　　金：国家自然科学基金资助项目(50807047);中央高校基本科研业务费专项资金资助项目(2009QNA4013)

摘　　要：研究了差模电流激励下的共模扼流圈磁饱和效应,建立了共模扼流圈的有限元分析模型。共模扼流圈三维磁场分布的仿真计算结果显示,磁芯中差模电流激励的磁通并没有完全抵消,仍有少量漏磁存在。这些漏磁增加了磁芯的磁通密度,并导致磁芯部分饱和。为得到共模扼流圈在磁芯部分饱和情况下的共模电感值,借助有限元数值分析,给出了求取共模扼流圈动态电感的计算方法。最后设计了测量差模电流激励下共模扼流圈动态饱和电感的实验,仿真计算与实验测量结果吻合较好,表明所提出的共模扼流圈动态电感的计算方法是有效的。This paper analyzes the differential mode（DM）current excited core saturation effect in common mode（CM）choke.This is performed by finite element analysis and computation of 3D magnetic field distribution in the magnetic core of CM choke.The simulation result shows that the DM current excited flux is not cancelled completely in the core,and it remains some leakage flux,which increases flux density in the core,and gives rise to partial saturation of the core.In order to determine the CM inductance of the CM choke when its core is partially saturated by DM current excitation,the paper then presents a method to calculate the dynamic inductance of the CM choke with assistance of FEA tool.Finally,an experiment for CM inductance measurement of a prototype of CM choke under DM direct current bias is carried out to validate the method of dynamic inductance calculation.

关 键 词：共模扼流圈 磁芯饱和 动态电感 有限元分析 

分 类 号：TM132[电气工程—电工理论与新技术]