Papers - SAKODA Tatsuya
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通水型オゾナイザの放電形態が脱色特性に与える影響 Reviewed
塩満栄一, 有吉純也, 藤真介, 迫田達也, 貴島純次, 中島秀之
電気学会論文誌A 133 ( 11 ) 606 - 607 2013.11
Language：Japanese Publishing type：Research paper (scientific journal)
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Influence of triple-junction on sparkover voltage for a series gap of arrester
Tokunaga T., Nishikawa S., Sakoda T., Fukano T.
2013 IEEE Electrical Insulation Conference, EIC 2013 110 - 113 2013.9
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：2013 IEEE Electrical Insulation Conference, EIC 2013
Considering the latest development of advanced information society, a stable supply of electric power should be maintained. Lightning surge arrester can contribute to reduce electric failures due to overvoltage from lightning. Since 1970's, zinc oxide (ZnO) element with superior non-linear voltage (V) - current (I) characteristics has been widely installed. Even in Japan, the surge arrester with a series gap has been installed to distribution systems for reducing the electrical failures. As mentioned above, the ZnO element has a superior nonlinearity of V-I characteristic, which can achieve suppress of overvoltage energy. Furthermore, the ZnO surge arrester with a series gap can interrupt the following current, immediately. The surge arrester with a series gap is composed of a simple gap electrode, a ceramic spacer for fixing the gap of the electrodes, and ZnO elements. The upper and the bottom of the ceramic spacer face metallic electrodes; therefore there are triple-junction points between the ceramic spacer, the metallic electrode, and gas. It is well known that electric field strength near the triple-junction point becomes high because of a triple-junction effect. It is also considered that the triple-junction point becomes a source of primary electrons by field emission due to the high electric field. Therefore, the triple-junction effect may influence the discharge characteristics so that the investigation will contribute to the further stable operation of a surge arrester with a series gap. In this study, we carried out experiments concerning how the triple-junction effect influences discharge characteristics such as breakdown voltage and discharge ignition. We first varied the distance between the discharge axis and the triple-junction point and then evaluated the discharge ignition time. Additionally, several ceramic materials with various relative permittivity were used. Based on the results, we evaluated the optimum distance between the discharge axis and the triple-junction point, which would be useful for design of a surge arrester with a series gap. © 2013 IEEE.
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Evaluation of Discharge Ignition by Composite Pollution Test with Silicone Rubber
OSHIKAWA Norihito, TOKUNAGA Tatsuya, HONDA Kazufumi, MIYAKE Takuma, SAKODA Tatsuya, ANJIKI Tomikazu
IEEJ Transactions on Fundamentals and Materials 133 ( 4 ) 205 - 210 2013.5
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan
Application of polymeric materials for electric power apparatus is spreading worldwide. However, the aged deterioration is anxious because of dry band arc discharges generated on the surface of the polymer materials. In this paper, we carried out composite pollution tests and measured the discharge ignition time of silicone rubber. The results showed that there was no large difference in the discharge ignition times obtained between ac and dc voltage applications. Additionally, it was shown that the difference of the discharge ignition was influenced by hygroscopic property of the pollution material.
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複合汚損試験によるシリコーンゴム表面上の放電開始時間の評価 Reviewed
押川典仁, 徳永達也, 本田一史, 三宅琢磨, 迫田達也, 安食富和
電気学会論文誌A 133 ( 4 ) 205 - 210 2013.4
Language：Japanese Publishing type：Research paper (scientific journal)
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Characteristics of a water plasma source with a porous glass membrane
SHIOMITSU Eiichi, KINO Hiroaki, YUJI Syohei, SAKODA Tatsuya, KIJIMA Junji, NAKASHIMA Hideyuki
2013 ( 10 ) 25 - 29 2013.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Influence of high electric field near a discharge gap on characteristics of impulse discharge
TOKUNAGA Tatsuya, NISHIKAWA Shinnosuke, SAKODA Tatsuya, FUKANO Takato, CHIBA Tomoki
2013 ( 1 ) 39 - 42 2013.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Influence of high electric field near a discharge gap on characteristics of impulse discharge
TOKUNAGA Tatsuya, NISHIKAWA Shinnosuke, SAKODA Tatsuya, FUKANO Takato, CHIBA Tomoki
2013 ( 10 ) 39 - 42 2013.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Influence of high electric field near a discharge gap on characteristics of impulse discharge
TOKUNAGA Tatsuya, NISHIKAWA Shinnosuke, SAKODA Tatsuya, FUKANO Takato, CHIBA Tomoki
2013 ( 42 ) 39 - 42 2013.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Characteristics of a water plasma source with a porous glass membrane
SHIOMITSU Eiichi, KINO Hiroaki, YUJI Syohei, SAKODA Tatsuya, KIJIMA Junji, NAKASHIMA Hideyuki
2013 ( 1 ) 25 - 29 2013.1
Language：Japanese Publishing type：Research paper (scientific journal)
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Characteristics of a water plasma source with a porous glass membrane
SHIOMITSU Eiichi, KINO Hiroaki, YUJI Syohei, SAKODA Tatsuya, KIJIMA Junji, NAKASHIMA Hideyuki
2013 ( 42 ) 25 - 29 2013.1
Language：Japanese Publishing type：Research paper (scientific journal)
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電気絶縁機器用ポリマー外被材の直流・交流時の電気的特性の評価 Reviewed
三宅琢磨, 瀬尾裕也, 押川典仁, 迫田達也, 大坪昌久, 安食富和
電気設備学会誌 32 ( 8 ) 594 - 599 2012.12
Language：Japanese Publishing type：Research paper (scientific journal)
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微細藻類がポリマーがいし外被材の絶縁特性に与える影響の評価 Reviewed
本田一史, 押川 典仁, 三宅 琢磨, 迫田 達也, 吉田 ナオト, 古河 征二
電気学会論文誌A 132 ( 11 ) 944 - 950 2012.12
Language：Japanese Publishing type：Research paper (scientific journal)
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Insulation Characteristics of Polymer Insulator Materials with Algaes
HONDA Kazufumi, OSHIKAWA Norihito, MIYAKE Takuma, SAKODA Tatsuya, YOSHIDA Naoto, FURUKAWA Seiji
IEEJ Transactions on Fundamentals and Materials 132 ( 11 ) 944 - 950 2012.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan
Polymer insulator has some excellent properties such as being lightweight, hydrophobicity, and antiweatherability. However, the polymer material is made from organic matters whereby the aged deterioration due to electric discharges, polluted deposited, and microbes is worrying.<br>In this study, we first investigated existence and kind of microbes on the surface of silicone rubber (SiR) insulators arranged outdoor for 11 years. Next, to investigate how the microbes influence insulation performance of polymeric materials, the salt fog tests were performed on SiR samples with the artificial cultured microbes. The microbes temporally increased the leakage current due to discharges; however, the degradation didn't continue because the discharges rejected the microbes.
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Frequency Dependence on Etching Characteristics of Silicon using Surface Discharge Plasma
ARIMURA Takuya, HIRANO Keta, HAMADA Toshiyuki, SAKODA Tatsuya
IEEJ Transactions on Fundamentals and Materials 132 ( 4 ) 333 - 334 2012.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan
We proposed a maskless plasma etching technique for fabrication of front contact grooves on a single crystalline silicon solar cell. In this paper, we evaluated characteristics of silicon etching with various output frequency of ac power source. The etching rate in the direction of the groove width was suppressed while that in the direction of the groove depth increased with increasing output frequency of the power source. Thus, it was found that the increase of output frequency of a power source was effective in the case where the surface discharge plasma was applied to patterning.
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Maximum Output Power Control using Short-Circuit Current and Open-Circuit Voltage of a Solar Panel Reviewed
Takahiro Kato, Takuma Miyake, Daisuke Tashima, Tatsuya Sakoda, Masahisa Otsubo, Mitsuyuki Hombu
Japanese Journal of Applied Physics 10 ( 51 ) 10NF08-1 - 10NF08-4 2012.10
Language：English Publishing type：Research paper (scientific journal)
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Maximum Output Power Control using Short-Circuit Current and Open-Circuit Voltage of a Solar Panel
Takahiro Kato, Takuma Miyake, Daisuke Tashima, Tatsuya Sakoda, Masahisa Otsubo, Mitsuyuki Hombu
Japanese Journal of Applied Physics 51 ( 10 PART 2 ) 1 - 10 2012.10
Language：Japanese Publishing type：Research paper (scientific journal)
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Daisuke Tashima, Hiromu Yoshitama, Tatsuya Sakoda, Akihito Okazaki, Takayuki Kawaji
Electrochimica Acta 77 198 - 203 2012.8
Language：Japanese Publishing type：Research paper (scientific journal)
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MIYAKE Takuma, SEO Yuya, OSHIKAWA Norihito, SAKODA Tatsuya, OTSUBO Masahisa, ANJIKI Tomikazu
32 ( 8 ) 594 - 599 2012.8
Language：Japanese Publishing type：Research paper (scientific journal)
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Characteristics of powdered activated carbon treated with dielectric barrier discharge for electric double-layer capacitors Reviewed
Daisuke Tashima, Hiromu Yoshitama, Tatsuya Sakoda, Akihito Okazaki, Takayuki Kawaji
Electrochimica Acta 77 198 - 203 2012.5
Language：English Publishing type：Research paper (scientific journal)
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沿面放電プラズマを用いたSiエッチングの電源周波数依存性 Reviewed
有村拓也, 平野啓太, 濱田俊之, 迫田達也
電気学会論文誌A 132 ( 4 ) 333 - 334 2012.4
Language：Japanese Publishing type：Research paper (scientific journal)