煤矿井下绞车配电室电磁辐射环境测试分析

使用R&S频谱分析仪FSP7及频段为9kHz～7GHz的电场天线,测试了绞车启动、运行和停车过程中煤矿井下绞车配电室内的电磁环境,分析后得出结论:(1)液压绞车启动时在整个频段内都产生干扰,在个别频段产生的干扰非常强,比正常运行时高40dB.μV/m;液压绞车停车和正常运行时产生的干扰很小。(2)变频钢缆绞车在运行、启动及停车时产生的电磁干扰都很大,在1m、1.7m高度测试的值基本相同,低频段的电磁干扰最大,最大电磁干扰达170dB.μV/m,比相应的背景噪声高80dB.μV/m。(3)变频钢缆绞车配电系统在绞车运行、启动以及停车过程中产生的电磁干扰都比液压绞车配电系统产生的电磁干扰大。

Analysis of Electromagnetic Radiation Environment Measuring in Winch Distribution Room of Coal Mine Underground

Electromagnetic radiation environment were measured in winch distribution room of coal mine underground during starting,running and stopping of winches by use of R&S spectrum analyzer FSP7 and 9 kHz~7 GHz electric field antenna.Following conclusions were gotten after analyzing the measured data:(1) The EMI is produced in the entire frequency band when hydraulic winches start.The EMI is very strong in individual band which is 40 dB·μV/m more than the ones in normal running.The EMI is very small during normal running and stopping of hydraulic winches.(2) The EMI is very strong during running,starting and stopping of frequency-conversion winches of wire rope.The measured value of EMI is fundamental same at 1 m,1.7 m height.The EMI in low-frequency is very large and the maximum EMI achieves 170 dB·μV/m,which is 80 dB·μV/m more than the corresponding background noise.(3) The EMI during running,starting and stopping of frequency-conversion winches of wire rope is more than the one of hydraulic winches in the same processes.