标题: 求教大神怎么理解IEC61000-4-4第7.3.2.2章节中“direct injection” [打印本页] 作者: jansle_happy 时间: 2022-3-22 17:17 标题: 求教大神怎么理解IEC61000-4-4第7.3.2.2章节中“direct injection” 求教大神怎么理解IEC61000-4-4第7.3.2.2章节中“direct injection”，谢谢。 & _' B& z7 O3 w1 q4 j; QIf a suitable coupler/decoupler is not available, e.g. for a.c. mains currents >100 A, alternative methods can be employed, as follows: / r2 l9 n c% }1 M3 h2 e9 i8 v in case of common and unsymmetric modes, direct injection using the (33 ± 6,6) nF capacitors is the preferred coupling mode; " y8 {( U5 Y0 I! {2 E/ w if direct injection is not practical, the capacitive clamp is used. + s0 D* p# M& r$ k4 a; h5 q- N- [6 @% N3 g5 H