Surface Discharge Characteristics under Different Rise Times and Fall Times of Positive Repetitive Square Voltage using Pulse Sequence Analysis

In this paper, the surface discharge pulses of PEEK (polyetheretherketone) are measured under different rise times and fall times of positive repetitive square voltage. There tends to be more discharge pulses in a single period when the voltage rise time or fall time is large enough. Pulse sequence analysis (PSA) is used to investigate the characteristics of surface discharge under different rise times and fall times by extracting the voltage when discharges occur and the voltage differences between consecutive discharge pulses. The results show that the forward discharge could occur at lower applied voltage and the back discharge could occur at higher applied voltage for the large voltage rise time or fall time. Besides, the previous discharge is correlated with the following discharge for the multiple discharges, and the total discharge quantity of two consecutive forward discharges or back discharges is approximately proportional to the voltage difference between them.