In this study, the surface discharge current pulses of polyetheretherketone (PEEK) material under positive repetitive square voltage in a nitrogen atmosphere are measured. The influences of different voltage amplitudes and frequencies on the detail parameters of forward discharge and backward discharge current pulses are statistically analysed. The results show that as the square voltage amplitude increases, the current pulse amplitude, fall time and pulse width of both forward and backward discharge current increase, and the rise time does not change significantly. As the voltage frequency increases, current pulse amplitude, fall time and pulse width of both forward and backward discharge current decrease, and the rise time does not change significantly. Due to the independence of the discharge at different repetitive cycles, the specific discharge process in one cycle is analysed in detail to explain the influence mechanism of the voltage amplitude and frequency on the discharge current. By mean of the Richardson–Schottky and the Cavallini relaxation model, the relationship between discharge voltage ratio and surface charge, and the decay process of surface discharge are analysed. Furthermore, the influences of amplitude and frequency of the positive repetitive square voltage on the PEEK surface current pulses are explained qualitatively.

在这项研究中，在氮气氛下，在正向重复方电压下测量聚醚醚酮（PEEK）材料的表面放电电流脉冲。统计分析了不同电压幅值和频率对正向和反向放电电流脉冲细节参数的影响。结果表明，随着平方电压幅值的增加，正向和反向放电电流的电流脉冲幅值，下降时间和脉冲宽度均增大，上升时间没有明显变化。随着电压频率的增加，电流脉冲幅度，下降时间和正向和反向放电电流的脉冲宽度均减小，并且上升时间没有明显变化。由于放电在不同重复周期下的独立性，详细分析了一个循环中的特定放电过程，以解释电压幅度和频率对放电电流的影响机理。利用Richardson-Schottky模型和Cavallini弛豫模型，分析了放电电压比与表面电荷之间的关系，以及表面放电的衰减过程。此外，定性地解释了正重复方电压的幅度和频率对PEEK表面电流脉冲的影响。分析了表面放电的衰减过程。此外，定性地解释了正重复方电压的幅度和频率对PEEK表面电流脉冲的影响。分析了表面放电的衰减过程。此外，定性地解释了正重复方电压的幅度和频率对PEEK表面电流脉冲的影响。