摘要
针对航天器开关电源中变压器在低气压环境下绕组内层间发生介质阻挡放电,设计了简单的实验模型演示了高频开关电源变压器层间发生介质阻挡放电的现象。通过实验总结得到:交流电压若超过空气最低帕刑击穿电压,则变压器在低气压环境下会发生剧烈的交流介质阻挡放电,经过几十分钟的发展,绝缘层会烧蚀碳化,引起火花放电或短路;高压直流不会发生导致绝缘层迅速烧毁的介质阻挡放电;当交流电压幅值低于空气帕刑击穿电压时,在低气压环境下,不会发生剧烈的交流介质阻挡放电;高压直流叠加低压交流,交流电压幅值小于空气帕刑击穿电压的情况下也不会发生剧烈的交流介质阻挡放电。
This paper designs a series of verification experiments for the phenomenon of dielectric barrier discharge between winding layers of a satellite-borne switching power supply transformer in a low-pressure environment.A simplified experimental model was used to demonstrate the phenomenon of dielectric barrier discharge occurring between the winding layers of high-frequency switching power supply transformers.It is concluded from the experiment that:(1)If the peak value of the AC voltage exceeds the minimum breakdown voltage of the air,the transformer will undergo a violent AC dielectric barrier discharge in a low-pressure environment.After tens of minutes to hours of development,the insulation layer will ablation carbonization,causing spark discharge or short circuit.(2)High-voltage direct current will not cause dielectric barrier discharge that causes the insulation layer to burn out quickly.(3)When the amplitude of the AC voltage is lower than the breakdown voltage of the air brake,no violent AC dielectric barrier discharge will occur in a low-pressure environment.(4)High-voltage DC superimposes low-voltage AC,and the AC voltage amplitude is less than the breakdown voltage of the air barrier.No severe AC dielectric barrier discharge will occur.
作者
陈昶文
王少宁
徐恒通
CHEN Chang-wen;WANG Shao-ning;XU Heng-tong(Lanzhou Institute of Space Technology Physics,Lanzhou 730000,China)
出处
《电工电能新技术》
CSCD
北大核心
2020年第11期18-24,共7页
Advanced Technology of Electrical Engineering and Energy
基金
兰州空间技术物理研究所技术评审和实验设备的资助。
关键词
变压器
开关电源
低气压
局部放电
介质阻挡放电
transformer
switching power supply
low pressure
partial discharge
dielectric barrier discharge
