LED车灯窄带辐射电磁干扰的研究  

A Research on the Electromagnetic Interferences of Narrowband Radiation on Automotive LED Lights

作　　者：凌铭[1,2] 黄中荣[1,2] 杨洁翔 杨东[1,2] 

机构地区：[1]国家机动车产品质量监督检验中心,上海201805 [2]上海机动车检测中心,上海201805 [3]上海半导体照明工程技术研究中心,上海201805

出　　处：《汽车工程》2015年第4期456-459,共4页Automotive Engineering

基　　金：国家质检总局科技项目(T2012-SHQTS-0023)资助

摘　　要：在10m法暗室内，对汽车的全LED前组合灯进行了整车和部件在窄带辐射电磁干扰下的测试。结果表明，在频率20—220MHz范围内，LED照度随场强增加而衰减，整车测试的照度衰减大于部件测试的照度衰减；不同车灯的激亮频率和阈值不同，部件测试的激亮阈值大于整车测试。根据测试结果，建议对LED车灯采取窄带辐射抗干扰措施，以免引发错误信号，而对于LED车灯窄带辐射抗扰测试，采用整车测试比部件测试更合理。The full LED front combination lamps are tested both in vehicle and as component alone in a 10- meter semi-anechoic chamber under a narrowband radiated electromagnetic interference. The results show that in a frequency range of 20-220MHz, LED illuminance reduces with the increase of electric field intensity, and the reduc- tion in illuminance in vehicle test is Xarger than that in component test. Different LED lamps have different lit fre- quencies and thresholds, and the lit thresholds in component test are higher than that in vehicle test. Based on test results, it is suggested that measures for the anti-interference of narrow-band radiation should be taken for automo- tive LED lamps to avoid false signals, and for narrowband radiated electromagnetic interference tests, vehicle test is preferable to component one.

关 键 词：LED车灯 窄带辐射 电磁干扰 

分 类 号：U463.65[机械工程—车辆工程] U467[交通运输工程—载运工具运用工程]