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为揭示工况参数对弓网电弧电场噪声特性的作用规律,利用自行研制的弓网电弧电磁噪声实验系统,采用单因素实验法,改变供电电压、回路电流、功率因数、运行速度、接触压力等实验条件,开展了91组弓网电弧辐射电场噪声实验.在30~60 MHz频段内,弓网电弧电场噪声幅值较大,高于背景噪声及其它频段电场噪声.31~44 MHz频带内的电场噪声超过限值,会严重影响调频收发信机的正常工作.提高供电电压,电场噪声的等效场强呈现增大趋势;列车感性负载越少,功率因数越接近1,则电场噪声越小.
In order to reveal the law of the operating parameters on the electric field noise characteristics of arch electric arc, a single-factor experiment was used to change the electric supply voltage, loop current, power factor, operating speed and contact pressure Experimental conditions 91 bow electric field arc arc electric field noise experiments carried out in 30 ~ 60 MHz band arc electric field arc amplitude larger than the background noise and other band electric field noise in the band 31 ~ 44 MHz When the electric field noise exceeds the limit value, the normal operation of the FM transceiver will be seriously affected, and the equivalent field strength of the supply voltage and electric field noise will increase. The less the train inductive load, the closer the power factor is to 1, the smaller the electric field noise .