DC Arc Resistance Rise by PMMA Cylinder Ablation with Arc Shrinking in Silica Sand Filling Space
DC Arc Resistance Rise by PMMA Cylinder Ablation with Arc Shrinking in Silica Sand Filling Space
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硅砂填充空间中PMMA圆柱体烧蚀和电弧收缩导致直流电弧电阻上升
DOI：
10.1002/tee.23462
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发表时间：
2021
影响因子：
1
通讯作者：
Naoki Yamamura
中科院分区：
文献类型：
--
作者：
N. Kodama;Koya Nakamura;Y. Yokomizu;Asato Takahashi;Naoki Yamamura
针对硅砂填充空间直流熄弧现象，提出了一种利用高分子材料布置提高弧柱电阻（rcol）的新方法。本文根据石英（SiO_2）和聚甲基丙烯酸甲酯（（C_5H_8O_2）_n）制成的不同内径的圆柱体的实验结果，揭示了影响圆柱体收缩的物理因素。对于λ = 2 mm的情况，PMMA圆柱体排列的rcol测量表明在低电流区域rcol较高，而在电流峰值附近rcol几乎相同。对于λ = 3 mm的情况，PMMA圆柱体的rcol在高电流区低于石英情况的rcol，而在低电流区这些条件之间几乎相当。对于φ = 5 mm的情况，在灭弧过程中rcol几乎相同。为了讨论Rcol上升的影响，还进行了以下工作：（i）观察灭弧后的圆柱体;（ii）计算SiO_2/Cu或PMMA/SiO_2混合蒸气的电子密度。结果表明，在大电流区，由于圆柱孔和填充在圆柱孔内的硅砂使导弧直径缩小，从而导致rcol增大。另一方面，PMMA烧蚀蒸汽的混合增加了本实验中低电流区的rcol。© 2021日本电气工程师协会。出版社：Wiley Periodicals LLC
Concerning DC arc quenching phenomenon in silica sand filling space, we have proposed a new method for raising an arc column resistance (rcol) by use of polymer‐material arrangement. This paper reveals physical factors for rcol rise on the bases of experimental results using the following cylinders made of: (i) Quartz (SiO2) and (ii) PMMA ((C5H8O2)n) with various inner diameters ϕ. For ϕ = 2 mm case, rcol measured for a PMMA cylinder arrangement indicated higher rcol at low current region, while almost same rcol around current peak. For ϕ = 3 mm case, rcol for the PMMA cylinder was lower than rcol for the quartz case at high current region, while almost comparable between these conditions at low current region. For ϕ = 5 mm case, rcol were almost same during the arc quenching process. To discuss the effect of the rcol rise, the followings were also performed: (i) observation of cylinders after arc quenching and (ii) calculation of the electron density of SiO2/Cu or PMMA/SiO2 mixture vapors. It is concluded that, at high current region, rcol can increase due to the shrinking of the arc conductive diameter caused by the cylinder hole and the silica sand filled inside the cylinder hole. On the other hand, the admixing of the PMMA ablation vapor increases rcol at low current region in the present experiment. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.