电工技术学报2016，Vol.31Issue(24)：157-163,7.
直流真空电弧强迫开断电弧形态
Morphology of Forcing Interruption Arc of DC Vacuum Arc
摘要
Abstract
With the applications of DC270V system in aviation field, the demand for DC switch has increased. At present, DC switch is mostly air switch, its switching capacity is small. For high capacity DC switch, vacuum switch has many advantages. According to the experiments of short gap vacuum DC interruption on DC270V system for aviation, the arc voltage and current characteristics of DC arc forcing interruption are analyzed. The impacts of the circuit parameters on the current rates di/dt, overvoltage rates dv/dt and their coupling situation are discussed. Under the same test current, the dynamic characteristics of arc diameter are studied. In forcing phase, the arc diameters of butt contacts decrease smoothly, while the AMF arc changes little, and has a sharp shrink before it quenches. Arc diameter increases slightly with the increase of the test current. At arc ignition stage, the arc diameters of butt-type contacts increase logarithmically, while the AMF arc is unchanged. The function of butt contact arc diameter is obtained. The arc diameter of plate contact is larger than that of the AMF before the forcing current injects.关键词
直流真空电弧/强迫开断/电弧直径/电弧扩散Key words
DC vacuum arc/forcing interruption/arc diameter/arc expand分类
信息技术与安全科学引用本文复制引用
刘斌,武建文..直流真空电弧强迫开断电弧形态[J].电工技术学报,2016,31(24):157-163,7.基金项目
国家自然科学基金资助项目（50877002）。 （）
