Title: Research and Application of Active Common-Mode EMI Filter in High-Frequency Switching Power Supply
Abstract: On the research platform of flyback switching power supply,problems of EMI,especially the problem of common-mode con-ducted EMI in the switching power supply were analyzed in detail.The key research was the suppression method of active common-mode conducted EMI based on the operational amplif ier.The comparison of experimental principle and EMI level between the system with an ac-tive common-mode EMI f ilter and the system without an active common-mode EMI f ilter was made.The experiment verif ies that this active common-mode EMI f ilter is stable and works well.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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