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황휘동,주흥진,Chi-Wuk Gu,고광철 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
The shape of an arc shield in a vacuum interrupter (VI) is varied for the development of insulation. Through the experiment, the flashover voltage is estimated, and the computer-aided finite element method (FEM) is applied to observe the electric field distribution when the impulse voltage is applied. The three parameters - upper side length of the floating arc shield, lower side length of the floating arc shield, and slope of the end plate of the arc shield - are selected as design variables to find the optimal condition for minimizing the maximum electric field. The response surface methodology (RSM), combined with the full factorial design (FFD) is applied as an optimization method, where the FFD is used to decrease the number of iterations of the experiment.
황휘동,구치욱,정경재,최재명,김곤호,고광철,Hwang, Hui-Dong,Gu, Chi-Wuk,Chung, Kyung-Jae,Choe, Jae-Myung,Kim, Gon-Ho,Ko, Kwang-Cheol 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.6
The conducting current of non-uniform plasma immersed electrode consists of ion current and secondary electron emission current caused by the impinging ion current. The ion current is determined by the ion dose passing through the sheath in front of electrode and the ion distribution in front of the electrode plays an important role in the secondary electron emission. The investigation of the distributed plasma and secondary electron effect on electrode ion current was carried out as the stainless steel electrode plugged with quartz tube was immersed in the inductively coupled Ar plasma using the antenna powered by 1 kw and the density profile was measured. After that, the negative voltage was applied by 1 kV~6 kV to measure the conduction current for the analysis of ion current.