资源描述：
《接地连续对emc 的影响-ait-电磁兼容整改案例》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、公司地址：东莞市黄江镇田心村滨河路6号(邮编：523765)东莞市亚勖电子科技有限公司Address:No.6,Bin-HeRoad,Tian-XinVillage,Huang-Jiang,DongGuan,GuangDong,China(PostCode：523765)AsiaInstituteTechnology(Dongguan)LimitedTel:+86.769.8202.0496-9Fax:+86.769.8202.0495E-mail：bovey.yang@ait-china.com接地连续对E
2、MC的影响-AIT-电磁兼容整改案例现象描述对一产品(电脑机箱一体机)进行辐射测试,发现垂直水平均不能满足EN55022的要求,具体现象是从30MHz--300MHz频率段严重超标,最大超过辐射限值10几个dB,测试图如下图表1垂直方向FrequencyCorrectFactorReadingLevelMeasureLevelMarginLimitDetectorType(MHz)(dB)(dBuV)(dBuV/m)(dB)(dBuV/m)159.10014.25027.30241.5521.55240.00
3、0PEAK2134.76015.49030.43945.9295.92940.000PEAK3208.48013.73027.88741.6171.61740.000PEAK4232.73014.76027.78642.546-4.45447.000PEAKRzland.com5432.55020.77020.50841.278-5.72247.000PEAK6499.48022.27020.53942.809-4.19147.000PEAK7601.33024.86016.18341.043-5.95747
4、.000PEAK图表2水平方向认证之家-爱心,热心,关心,打造EMC,安规工程师成长的舞台电磁兼容论坛电磁兼容原理http://www.rzland.com/bbs5公司地址：东莞市黄江镇田心村滨河路6号(邮编：523765)东莞市亚勖电子科技有限公司Address:No.6,Bin-HeRoad,Tian-XinVillage,Huang-Jiang,DongGuan,GuangDong,China(PostCode：523765)AsiaInstituteTechnology(Dongguan)Limit
5、edTel:+86.769.8202.0496-9Fax:+86.769.8202.0495E-mail：bovey.yang@ait-china.comFrequencyCorrectFactorReadingLevelMeasureLevelMarginLimitDetectorType(MHz)(dB)(dBuV)(dBuV/m)(dB)(dBuV/m)197.90012.10035.74647.8467.84640.000PEAK2134.76015.49034.08049.5709.57040.00
6、0PEAK3184.23014.89032.71147.6017.60140.000PEAK4*208.48013.73036.95750.68710.68740.000PEAK5232.73014.76036.88851.6484.64847.000PEAK6257.95015.71028.86744.577-2.42347.000PEAK7306.45017.30025.20442.504-4.49647.000PEAK8366.59018.90023.00941.909-5.09147.000PEAK9
7、432.55020.77026.78247.5520.55247.000PEAK10499.48022.27021.10143.371-3.62947.000PEAK原因分析经过检查发现,带电脑周边和不带电脑周边差别很大,但电脑的波形图如下图表3水平方向Rzland.com认证之家-爱心,热心,关心,打造EMC,安规工程师成长的舞台电磁兼容论坛电磁兼容原理http://www.rzland.com/bbs5公司地址：东莞市黄江镇田心村滨河路6号(邮编：523765)东莞市亚勖电子科技有限公司Address:N
8、o.6,Bin-HeRoad,Tian-XinVillage,Huang-Jiang,DongGuan,GuangDong,China(PostCode：523765)AsiaInstituteTechnology(Dongguan)LimitedTel:+86.769.8202.0496-9Fax:+86.769.8202.0495E-mail：bovey.yang@ait-china.com图表
