CAJ | 학술논문

EMI滤波器以其抑制开关电源中传导电磁干扰的有效性而得到越来越多的重视。相比于分立元件构成的滤波器，平面EMI滤波器拥有整体体积小、高频性能好等优点。然而，该类滤波器对电感的等效并联电容（ EPC）和等效串联电阻（ ESR）有其特殊要求。本文基于EMI滤波器的基本原理，分析其PCB导线截面设计对共模电感工作性能的影响；在现有技术条件下，提出一种基于分股并联结构的平面集成LC单元；分析了分股并联结构LC单元共模电感部分的EPC和ESR特性，并与单股导线结构的对应性能进行了比较。
EMI려파기이기억제개관전원중전도전자간우적유효성이득도월래월다적중시。상비우분립원건구성적려파기，평면EMI려파기옹유정체체적소、고빈성능호등우점。연이，해류려파기대전감적등효병련전용（ EPC）화등효천련전조（ ESR）유기특수요구。본문기우EMI려파기적기본원리，분석기PCB도선절면설계대공모전감공작성능적영향；재현유기술조건하，제출일충기우분고병련결구적평면집성LC단원；분석료분고병련결구LC단원공모전감부분적EPC화ESR특성，병여단고도선결구적대응성능진행료비교。
EMI filter plays an important role in restraining conducted EMI. Planar EMI filter has a decreased size and high reliability in high frequency performance compared to passive discrete EMI filter. However, the planar EMI filter has special requirements in equivalent parallel capacitance ( EPC ) and equivalent series resistance ( ESR) . Based on basic principles of EMI filter theory, the influence of PCB trace section design to the perform?ance of common mode inductance ( CM) is analyzed;an integrated LC unit based on parallel structure is proposed;and compared to single structure, the characteristics of EPC and ESR of common mode inductance ( CM) in LC u?nit with parallel structure are analyzed.