The polarity of impulse voltage and the polarity of insulator surface electric charge can affect the corona initial time of insulator, the change time - interval and the corona current.
外拖冲击电压的极性与绝缘子表面电荷极性是否相同会影响绝缘子的电晕起始时刻、由流注向先导的转变时间间隔和流注电晕电流。
By neglecting the value change of the charge to mass ratio caused by the different pesticide solution, the corona charging method was used with water solution replacing pesticide solution.
在对不同药液引起的荷质比值的变化不作考虑的情况下，以水溶液代替药液，运用电晕充电法进行荷电喷雾，研究了测量系统对荷质比测量精度的影响。
Short-circuit decay of surface charge was performed on corona-charged sample by employing the mentioned patterns of electrode.
发现当采用压接电极时，表面电荷消散速度较慢；
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