空气间隙固定和连续变化时的空气静电放电事件研究

Study on the Air Electrostatic Discharge Event at Constant and Alterable Air Gap

为得到2种状态下空气静电放电(ESD)辐射电磁场与放电间隙间距、放电电压和电极接近速度之间的关系,在-30～30kV的宽电压范围和多种温湿度条件下,通过实验测量记录了两种状态的空气ESD事件;给出了空气ESD事件的解释;提出了空气ESD存在"增长间隙区"、"跌落间隙区"、"平坦间隙区"和"零放电间隙区"4个放电间隙区。通过分析得到:放电间隙区的分布主要与放电电压的大小相关,且在高电压时各放电间隙区分布更明显;一定电极接近速度下的空气ESD与一定放电间隙区的空气ESD相对应,改变电极接近速度可以获得跨越放电间隙区的空气ESD,特别在高压放电时更容易获得跨越式空气ESD。

Using broad discharge voltages from-30 to 30 k V and several temperature anti iaumlalty conatnons, me a^r electrostatic discharge （ ESD） events at constant and alterabte air gaps were measured and recorded. The correlations among discharge.air gaps, discharge voltages, electrode approaching velocities, and air ESD radiated fields were analyzed, and the air ESD events were narrated. A new concept classifying air ESD areas was proposed. The air ESD can be classified into four discharge gap areas such as rising area, falling area, flatness area, and zero discharge area. The distribution of the discharge gap area is more distinctive under higher discharge voltages. The discharge at a certain discharge gap area corresponds to the discharge at a certain approaching speed of electrode. The discharge gap area can be overleaped by changing the approaching speeds of electrode, especially under high discharge voltages.