Phenomena of susceptibility to strong electromagnetic radiation effects of regulated power supply
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摘要: 为探究电子设备在强电磁场环境中出现重启、关机现象的根本原因，以某型直流稳定电源为受试对象，观察在强场连续波电磁辐射作用下受试电源表现出的敏感现象。选择电压相对变化量作为效应参量，并描述效应参量随干扰场强的变化规律。辐照试验在GTEM室中进行，干扰信号频段为80～
1000 MHz，最高场强为300 V/m。试验结果表明，受试电源的输出电压变化可分为两个阶段。干扰场强较低时，电压变化量表现为单调上升、单调下降或先上升后下降；该阶段电压变化量不超过20%，负载设备仍能正常运转。干扰场强较高时，电压变化量表现为突变，可分为停止干扰后关停（80～120 MHz、320～350 MHz）、施加干扰时关停（220～270 MHz、360～420 MHz）、重启（570～590 MHz、700～720 MHz、860～880 MHz）等三种对负载用电设备造成实际威胁的干扰现象。两个阶段的敏感现象无明显对应关系。Abstract: To explore the root cause of the reboot and shutdown phenomenon of electronic equipment in a strong electromagnetic field environment, this study considered a certain type of DC-regulated power supply as a test object and observed the susceptibility phenomena exhibited by the power supply under strong continuous wave electromagnetic radiation. In this experiment, the relative variation in voltage was selected as the effect parameter, and the variation feature of the effect parameter with the interference field strength was described. The irradiation test was carried out in the GTEM cell with an interference signal frequency range of 80–1000 MHz and a maximum field strength of 300 V/m. The test results indicate that the output voltage variation of the test power supply can be divided into two stages. When the interference field strength was low, the variation types of voltage included monotone rise, monotone fall, or first rise and then fall. At this stage, the voltage variation did not exceed 20%, and the load equipment could still operate normally. When the interference field strength was high, the voltage variation showed a sudden change. It could be divided into three types of interference phenomena such as shutting down after stopping interference (80–120 MHz, 320–350 MHz), shutting down when jamming (220–270 MHz, 360–420 MHz), rebooting (570–590 MHz, 700–720 MHz, 860–880 MHz), which posed actual threat to the load electrical equipment. There was no obvious correspondence between the susceptibility phenomena of the two stages. -
图 1 连续波强场电磁辐射试验装置
Figure 1. Test configuration of CW strong field electromagnetic radiation
图 4 出现停止干扰后关停现象时输出电压变化规律
Figure 4. Feature of output voltage when shutdown occurs after jamming
图 5 出现施加干扰时关停现象时输出电压变化规律
Figure 5. Feature of output voltage when shutdown occurs when jamming
表 1 试验设备型号与性能参数
Table 1. Model and performance parameters of experimental equipments
equipment model main performance parameters signal source SML 01 9 kHz～1.1 GHz power amplifier AR4000W1000B 80～ 1000 MHzdirectional coupler AR-DC6380 80～ 1000 MHzdynamometer NRVD 9 kHz～3 GHz regulated power supply − 0～32 V, 3 A field intensity indicator EMR-200 3 MHz～18 GHz 
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表 2 强场效应敏感频段及敏感现象
Table 2. Sensitive frequency bands and phenomena of strong field effects
frequency band/MHz sensitivity 80～120 shutdown after jamming 220～270 shutdown when jamming 320～350 shutdown after jamming 360～420 shutdown when jamming 570～590 rebooting 700～720 rebooting 860～880 rebooting
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