Papers - SAKODA Tatsuya
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デシカント空調システムにおける外気の絶対湿度とシステム運転方式との関係
石川敏嗣，藤澤一平，迫田達也，林則之
宮崎大学工学部紀要 46 179 - 184 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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マンゴーに発生する病害の防除を目指したプラズマミスと装置における芽胞菌及び大腸菌の殺菌
西村豪志, 堂園大雅, 後藤弘輝, 富永大, 迫田達也
宮崎大学工学部紀要 46 175 - 178 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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真空遮断器を対象とした部分放電検知の劣化診断技術の開発
朝倉匡俊, 岸本恵修, 三宅琢磨, 迫田達也, 壱岐祐典, 前田健作
宮崎大学工学部紀要 46 133 - 138 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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絶縁体内部で発生する部分放電の劣化特性
平島俊紀，中村友哉，白浜優吾，迫田達也
宮崎大学工学部紀要 46 139 - 142 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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電磁波センサを用いた配電機器内部で生じる部分放電の検出
白浜優吾，平島俊紀，中村友哉，迫田達也
宮崎大学工学部紀要 46 139 - 142 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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交流課電によるポリマー材料の耐電圧特性評価
出口竜也, 迫田達也, 阿嘉義昌, 安食富和, 深野孝人
宮崎大学工学部紀要 46 159 - 163 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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直列ギャップ付ZnO避雷器のV-t特性の改善に関する研究
堀江響, 迫田達也, 久保克隆, 水谷学, 深野孝人
宮崎大学工学部紀要 46 155 - 158 2017.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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Numerical Analysis of Electrical Characteristics of a PV Module Irradiated by an Impulse Light Flash Reviewed
CHEIKH IBRA WADE, RYO TORIHARA, TATSUYA SAKODA, NORIYUKI HAYASHI
The International Conference on Electrical Engineering 1 - 4 2017.6
Language：English Publishing type：Research paper (international conference proceedings)
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Study on Grasping Partial Discharge Development Using an Acoustic Emission Technique Reviewed
Tatsuya Sakoda, Toshiki Hirashima, Tomoya Nakamura, Yugo Shirahama, Noriyuki Hayashi
The Journal of CPRI 16 ( 3 ) 1 - 6 2017.3
Language：English Publishing type：Research paper (scientific journal)
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Wade C., Torihara R., Fukamachi Y., Sakoda T., Hayashi N.
IEEE Region 10 Annual International Conference, Proceedings/TENCON 2642 - 2645 2017.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEEE Region 10 Annual International Conference, Proceedings/TENCON
© 2016 IEEE. The authors have studied the diagnosis method of PV systems. In this paper, influences of partial shadow reflected partly on PV panels on the electrical characteristics of solar cells are numerically investigated by using the LT Spice simulation. Not only the change in I-V characteristics, but also the change in current and voltage distribution for every cell component are demonstrated and discussed based on the numerical results. It is clearly illustrated that the cell with the lowest transmission of sunlight among the cells concerned dominates the whole characteristics of the PV module. Numerical results obtained from the current simulation will provide basic knowledge when estimating the total I-V characteristics of a whole PV system which composed of multiple PV subsystems having different I-V characteristics with each other.
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Improvement of discharge ignition characteristics of a surge arrester with a spark gap
Horie H., Sakoda T., Kubo K., Mizutani M., Fukano T.
IEEJ Transactions on Power and Energy 137 ( 11 ) 724 - 729 2017
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：IEEJ Transactions on Power and Energy
© 2017 The Institute of Electrical Engineers of Japan. Surge arrester with a spark gap has been installed for reducing electrical failures in Japanese distribution system. The top and the bottom of a ceramic spacer for sustaining an electrode gap in a surge arrester contact with electrodes, of which the electric field becomes high. Therefore, high electric field region such as the triple junction point becomes a source to supply electrons to a spark-gap. In this study, we made some electrodes with a small step edge on an inclined plane of an electrode. The electric field around the small step edge became high, and we aimed that the small step edge functioned as if it were a triple junction points for a conventional spark gap. Based on measurements of V-t characteristic and the number of electrons per unit time, we investigated that the artificially formed high electric field region lower impulse spark-over voltage and that a spark-over voltage occurs within a duration of 0.4-1.2 μs when a positive impulse voltage of 25-42 kV with 1.2/50 μs is applied. The results will contribute on a further stabilization of discharge and increasing a degree of freedom for design of a spark gap.
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Chemical Analysis of Casual Elements for Deterioration of Cylindrical EDLC
Yoshitama H., Tashima D., Sakoda T., Hayashi N., Yuhara M., Utsunomiya T.
Electronics and Communications in Japan 99 ( 12 ) 36 - 43 2016.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Electronics and Communications in Japan
© 2016 Wiley Periodicals, Inc. Chemical analysis was carried out before and after the constant voltage hold test that was an acceleration deterioration examination to clarify deterioration factors of electric double-layer capacitor (EDLC). The results showed that the stress test slightly caused the increase of internal resistance. It was also confirmed that the range of fluorochemicals was formed on the electrode surface for approximately 10 nm in depth using electron spectroscopy for chemical analysis (ESCA). From the chemical analysis of the electrolyte using an inductively coupling plasma emission analyzer (ICP-OES), it was confirmed that the electrolyte included silicon which is one of the ingredient elements of an electrode and that the increase in holding voltage in the stress test decreased the silicon density in the electrolyte.
DOI： 10.1002/ecj.11911
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Chemical Analysis of Casual Elements for Deterioration of Cylindrical EDLC Reviewed
Hiroumu Yoshitama, Daisuke Tashima, Tatsuya Sakoda, Noriyuki Hayashi, Masamitsu Yuhara, Takashi Utsunomiya
Electronics and Communications in Japan 135 ( 12 ) 792 - 798 2016.12
Language：English Publishing type：Research paper (scientific journal)
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マンゴー炭疽病菌の分生胞子の殺菌に必要なオゾン濃度および処理時間に関する研究 Reviewed
富永大, 田中聡之, 迫田達也, 溝口則和, 櫛間義幸
電気学会論文誌 A 136 ( 11 ) 726 - 727 2016.11
Language：Japanese Publishing type：Research paper (scientific journal)
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Detection of Partial Discharges in Electric Power Equipment using an Electromagnetic Wave Sensor Reviewed
Yugo Shirahama, Toshiki Hirashima, Mitsuki Kawakone, Takuma Miyake, Tatsuya Sakoda
Joint Conference of IWHV2016 & JK2016 on ED&HVE 51 - 54 2016.11
Language：English Publishing type：Research paper (international conference proceedings)
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Study on improvement of discharge characteristics of a surge arrester with a spark gap Reviewed
Hibiki Horie, Takuma Miyake, Tatsuya Sakoda, Tatsuya Tokunaga, Katsutaka Kubo, Manabu Mizutani, Takato Fukano
Joint Conference of IWHV2016 & JK2016 on ED&HVE 81 - 85 2016.11
Language：English Publishing type：Research paper (international conference proceedings)
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Numerical Analysis of I-V Characteristics and Siode Currents of a PV Module Reflected by Partial Shadow Reviewed
C. I. Wade, R. Torihara, Y. Fukamachi, T. Sakoda, N. Hayashi
2016 IEEE Region 10 Conference (TENCON) 2644 - 2647 2016.11
Language：English Publishing type：Research paper (international conference proceedings)
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STERILIZATION OF COLLETOTRICHUM SP. USING A DISCHARGE SOURCE Reviewed
Takeshi Nishimura, Masaru Tominaga, Junichiro Tsuchida, Tatsuya Sakoda, Norikazu Mizoguchi, Yoshiyuki Kushima
The First International Conference on Hybridized Agriculture 40 - 46 2016.10
Language：English Publishing type：Research paper (international conference proceedings)
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AE及び電磁波センサを用いた部分放電検出”,宮崎大学工学部紀要
朝倉匡俊, 井平学, 三宅琢磨, 迫田達也, 壱岐祐典, 前田健作
宮崎大学工学部紀要 45 181 - 185 2016.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)
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絶縁ゴムのトラッキング劣化過程におけるAE信号特性
平島俊紀，白浜優吾，中村友哉，三宅琢磨，迫田達也，緒方貴仁，鎌田文麿，副島通邦
宮崎大学工学部紀要 45 ( 199 ) 204 2016.7
Language：Japanese Publishing type：Research paper (bulletin of university, research institution)