强电磁辐射条件下稳压电源输出中断现象与规律  

Output Interruption Phenomenon and Characteristics of Regulated Power Supply Under Strong Electromagnetic Radiation

作　　者：李晓鹏 孙江宁 魏光辉 潘晓东 李博文 LI Xiaopeng;SUN Jiangning;WEI Guanghui;PAN Xiaodong;LI Bowen(Shijiazhuang Campus,Army Engineering University of PLA,Shijiazhuang 050003,China;Hebei Electromagnetic Environment Technology Innovation Center,Norendar International Co.Ltd.,Shijiazhuang 050011,China)

机构地区：[1]陆军工程大学石家庄校区,河北石家庄050003 [2]北方工程设计研究院有限公司,河北省电磁环境技术创新中心,河北石家庄050011

出　　处：《陆军工程大学学报》2025年第2期65-70,共6页Journal of Army Engineering University of PLA

摘　　要：为探究某型稳压电源供电的通信电台在强场电磁辐照试验中出现关机现象的原因,以线性稳压电源供电通信电台作为受试对象,观察其在强场连续波作用下的敏感现象。辐照试验在GTEM室中进行,干扰信号频段为80~500 MHz,最高场强为300 V/m。结果表明,电台关机由稳压电源输出中断引起,稳压电源的输出电压随干扰场强增加先缓慢变化,干扰达到一定强度后电源输出突然中断。该中断现象在80~120和315~345 MHz频段内表现为停止干扰后电源输出中断,在220~270和350~420 MHz频段内表现为施加干扰时电源输出中断。结合敏感现象临界干扰场强随干扰频率的变化规律,分析中断现象的机理。干扰信号作用于受试电源与电台之间的互联线缆以及受试对象的金属外壳,在受试电源地线上产生感应电流,引起地电位波动,造成受试电源输出开关电路误操作,电源输出中断。To explore the cause of the shutdown phenomenon of the radio station powered by a certain type of regulated power supply in the test of strong electromagnetic radiation,with a radio station connected to a linear regulated power supply as the test subject,this paper observed the sensitivity phenomenon of the test subject under the strong continuous wave interference.The irradiation test was carried out in the GTEM Cell,with the interfering signal frequency band ranging from 80 to 500 MHz and the maximum electric field strength reaching 300 V/m.The results show that the shutdown of the radio station is caused by the output interruption of the regulated power supply.The output voltage of the regulated power supply changes slowly with the increase of the interference field intensity at first,and the output of the power supply interrupts suddenly when the interference reaches a certain intensity.The interruption phenomenon manifests as a power output interruption after the cessation of interference within the frequency bands of 80—120 MHz and 315—345 MHz,and as a power output interruption during the application of interference within the frequency bands of 220—270 MHz and 350—420 MHz.The mechanism was analyzed based on the change of the threshold interference field strength of sensitivity phenomena with the interference frequency.Interference signals act on the interconnection cables between the test power supply and the communication station,as well as the metal shell of the test object,generating the induced current in the ground wire of the test power supply,leading to fluctuations in the ground potential.As a result,the output switch circuit of the test power supply may malfunction,causing power output interruption.

关 键 词：电磁兼容 电磁环境效应 强电磁场 稳压电源 GTEM室 

分 类 号：TN97[电子电信—信号与信息处理] O44[电子电信—信息与通信工程]