Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Tetsu Shioiri"'
Autor:
Hiroyuki Nagai, Shigeyasu Matsuoka, Ryo Kikuchi, Kunihiko Hidaka, Tetsu Shioiri, Yuki Inada, Akiko Kumada
Publikováno v:
IEEE Transactions on Plasma Science. 47:5191-5197
During the breakdown process in a vacuum, plasma flares initiated on cathode and anode surfaces expand and collide. The plasma flare behavior is quite important for the optimization of the spark conditioning of vacuum interrupters. Here, copper–chr
Publikováno v:
2020 IEEE 3rd International Conference on Dielectrics (ICD).
In these days, a large number of offshore wind-farms projects are planned. For power delivery from such an offshore wind-farm with large amounts of energy, a gas-insulated transmission line (GIL) is expected to offer a solution owing to its low capac
Publikováno v:
2018 28th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV).
Generally, cathode triple junction (CTJ) is regarded as an electrical weak point for the occurrence of electron emission. In a typical vacuum flashover model, initiation of electron emission starts from the cathode triple junction. Therefore, it is i
Autor:
Akiko Kumada, Yuki Inada, Yoshimitsu Niwa, Tetsu Shioiri, Hiroyuki Nagai, Chihiro Tateyama, Takayoshi Ichikawa, Kunihiko Hidaka, Hisatoshi Ikeda
Publikováno v:
2018 28th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV).
In the dielectric breakdown process in vacuum, plasma flare initiated on cathode and/or anode surfaces expands and collides. The plasma flare behavior is quite important for the optimization of the spark conditioning in vacuum circuit breakers. Coppe
Publikováno v:
2018 28th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV).
Alumina ceramics are often used as vacuum electrical device insulators for the excellent properties, high quality of hardness, high heat-resistivity, high insulation and low gaseous desorption property. Since alumina is a chemically stable, it is dif
Autor:
Akiko Kumada, Shuji Sato, Takaaki Furukawa, Kunihiko Hidaka, Seisuke Nishimura, Masato Ueda, Hiroyuki Shimizu, Hisatoshi Ikeda, Mitsutaka Homma, Tetsu Shioiri
Publikováno v:
IEEE Transactions on Plasma Science. 41:1896-1903
To identify the influence of current interruption on the insulation strength of vacuum interrupters (VIs), the voltage to time-lag $(V{-}t)$ characteristics of VIs are measured from nanoseconds to several microseconds range before and after current i
Publikováno v:
2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV).
Alumina ceramics are widely used for vacuum insulation in devices such as vacuum interrupters. In development and design of vacuum interrupters, it is very important to improve the flashover characteristics on alumina ceramic surfaces in vacuum. Thus
Publikováno v:
2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV).
A contact electrode of vacuum interrupter (VI) has slit parts on the electrode surface to control the vacuum arc during the current interruption. The edge configuration of the slit is important for the withstand performance of high voltage applicatio
Autor:
Tetsu Shioiri, Mitsutaka Homma, Kunio Yokokura, Junichi Sato, Katsumi Suzuki, Naoki Asari, Sasage Kosuke
Publikováno v:
Electrical Engineering in Japan. 175:13-20
To investigate the reliability of equipment of vacuum insulation, a study was carried out to clarify breakdown probability distributions in a vacuum gap. Further, a double-break vacuum circuit breaker was investigated for breakdown probability distri
Publikováno v:
IEEJ Transactions on Fundamentals and Materials. 130:781-786
Small discharge not to accompany breakdown can occur under high electric field in vacuum, however the mechanism is not well clarified. We have found that the current of small discharge decreases with repeated voltage applications, and leads to electr