摘要
扼流圈是组成EMI滤波器的核心元件,其集成化的设计对滤波器小型化、高功率密度化有重要影响。针对以往扼流圈元件多、集成效果差,本文提出一种新结构的平面磁集成扼流圈,分析了其在差、共模电流下磁通耦合方式,说明了差、共模电感形成原理,并得到了等效电路;对比分立元件构成的扼流圈,说明了其在电感特性和阻抗对称性能方面的优势。S参数法测量滤波器插入增益的原理得到了阐述,实验验证了新结构集成扼流圈的有效性和优越性。
The integrating of EMI choke plays an important role in the miniaturization and high power density of EMI filter. In order to improve the poor characteristics of the conventional EMI choke, a new structure of integrated planar choker is proposed. Based on this, the magnetic flux coupling under difference module current and common module current is analyzed, the forming principle of differential module inductance and common module inductance is elaborated and the equivalent circuit is finally obtained. The superiorities of inductance characteristics and im？pedance symmetric of this structure are illustrated. The principles of insertion gain based on the S parameter method are elaborated and the effectiveness and the superiority of the new structure are verified by experiment.
出处
《电工电能新技术》
CSCD
北大核心
2014年第5期22-26,共5页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金资助项目(51177071)
关键词
扼流圈
平面磁集成
插入增益
choke
planar integrated magnetic
insertion gain
