电讯技术Issue(6)：835-839,5.DOI:10.3969/j.issn.1001-893x.2014.06.026
3 kW微波源传导电磁干扰测试及分析
Measurement and Analysis of Conducted Electromagnetic Interference inside 3 kW Microwave Source
摘要
Abstract
Electromagnetic interference ( EMI) inside the microwave source case can couple outside along the power lines to affect other power electronic equipment when it is working. There exists many literatures for research on conducted EMI of the three-phase input power lines, in which the separated common-mode ( CM) current and differential-mode ( DM) current between three-phase lines are only considered, but the analysis of conducted EMI on neutral line is absent. In this paper,a current sensor, which is cali-brated in a vector network analyzer, is used to measure the conducted EMI of 3 kW magnetron microwave source power lines, then the interference current on phase line and neutral line at 150 kHz~30 MHz is ob-tained, and the CM and DM current is separated. EMI mode on the neutral line is analyzed by comparing the DM current spectrum with the interference spectrum on the neutral line. The tested data shows that DM interference magnitude is above 10 dB larger than CM interference at 150 kHz~8 MHz, and the phenome-non that interference on neutral line and DM interference show a good concordance in terms of peak value indicates DM interference is in dominant on neutral line. Knowing about these interference distribution is helpful for proposing efficient interference suppression method.关键词
微波源/电磁干扰/共模/差模/中线Key words
microwave source/electromagnetic interference/common-mode/differential-mode/neutral line分类
信息技术与安全科学引用本文复制引用
冯强,廖成,熊祥正,叶志红..3 kW微波源传导电磁干扰测试及分析[J].电讯技术,2014,(6):835-839,5.基金项目
国家重点基础研究发展计划(973计划)项目(2013CB328904)@@@@Foundation Item:The National Program on Key Basic Research Project(973 Program)(2013CB328904) （973计划）
