电快速脉冲群试验的空间辐射场强特性研究

Research on Radiated Characteristic of Electrical Fast Transient Burst Experiment

由于电快速瞬变脉冲群试验时域上的多变性和频域上的宽带特性,经常会引起设备的误动、拒动和延迟动作。根据IEC 61000-4-4 2012推荐的数学表达式,在时域和频域上分析了电快速瞬变脉冲群干扰机理。针对其由于高频效应所带来的辐射特性,首次采用基于光纤传输的瞬态电磁场测量系统对电快速脉冲群试验辐射场强进行了测试评估。在容性耦合夹水平面0~200 cm和垂直方向0~50 cm(在坐标为50 cm处和100 cm处)做出其辐射场强分布,可为今后的试验布置提供一定参考。

The electrical fast transient burst（EFT/B） may cause the malfunction of EUT due to the transient charac-ter in time domain and wideband character in frequency domain. According to the mathematical expression recommended by IEC 61000-4-4 2012% this paper analyzed the interference mechanism of EFT/B both in time and frequency domain first. The radiated field strength was initially evaluated by the transient electromagnetic field measurement system based on optical fiber transmission. The distribution of the maximum field strength is presented along the plane of clamp in horizon direction（0~200 cm） and vertical direction（0~50 cm） at the point 50 cm and 100 cm. The measurement results are analyzed and some distorted waveforms and data were eliminated. The distribution of the field can be referenced during the test.