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Research on Power Conducted EMI Analysis and Suppression Methods(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2019年04期
Page:
70-74
Research Field:
2019全国集成电路可靠性学术会议专栏
Publishing date:

Info

Title:
Research on Power Conducted EMI Analysis and Suppression Methods
Author(s):
Chen Baoxiang1; Zhu Zhibo2; Huang Junshuo2; Wang Yongan2
(1.Jiangsu Medical Device Inspection Institute,Nanjing 210012,China)(2.Jiangsu Engineering Laboratory of Electrical Equipment Electromagnetic Compatibility,Nanjing Normal University,Nanjing 210023,China)
Keywords:
power supply; CRM Boost PFC converter; conducted EMI noise; conducted noise suppression
PACS:
TM933
DOI:
10.3969/j.issn.1672-1292.2019.04.012
Abstract:
In this paper,the CRM(Critical Conduction Mode)Boost PFC converter in power supply is taken as the research object,the voltage change rates of rectifier bridge under CRM are studied,the generation mechanism of differential mode and common mode conducted noise in positive and negative half cycle of AC is expounded,and the conducted electromagnetic interference caused by driving voltage overshoot is analyzed. By establishing equivalent circuit,a method of EMI suppression with capacitor in rectifier bridge circuit is proposed. This method can effectively reduce the conducted EMI and provide a practical technical scheme for engineering application.

References:

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Last Update: 2019-12-31