微秒脉冲下碳酸丙烯酯的击穿特性

采用紧凑Tesla变压器型脉冲功率驱动源及球电极击穿试件,通过改变初级充电电压,开展了微秒级充电条件下碳酸丙烯酯及其与碳酸乙烯酯的混合液的击穿实验研究。由结果和分析可知:碳酸丙烯酯理论工作温度可低至-55℃,这意味着它可以成为一种低温下的良好液体电介质;碳酸丙烯酯耐压性能与去离子水相当,且实测电阻率达到了10 MΩ·cm以上;向碳酸丙烯酯中添加碳酸乙烯酯后,介电常数可提高至80以上,耐压强度也有所提升;将碳酸丙烯酯、碳酸乙烯酯/碳酸丙烯酯混合液用于脉冲形成线作为储能介质无需附加去离子处理系统,有利于装置的紧凑化和小型化。

Breakdown characteristics of propylene carbonate under microsecond pulse

An electrical breakdown experiment for propylene carbonate with microsecond charging was carried out, in which a compact pulsed power generator based on the Tesla transformer was used as the pulsed voltage source, and a container with spherical electrodes was used as the test cell. The experimental results were presented and analyzed. The conclusions are as follows: For propylene carbonate, its breakdown strength is equal to water dielectrics and its actual measurement resistivity is bigger than 10 Mcm. Moreover, its theoretical operation temperature can arrive -55 centigrade and dielectric constant can improve to 80 through adding ethylene carbonate. Using propylene carbonate and ethylene carbonate / propylene carbonate mixture for a pulse forming line, a practical device will not require the additional processing system, that is conducive to the compact size and miniaturization of the apparatus. In a word, propylene carbonate is fit for the application of the compact pulsed power sources and propylene carbonate has a good application prospect.