Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Kenichi Nojima"'
Autor:
Jintong Sun, Yasutaka Nishigaki, Kenichi Nojima, Kazunari Karasawa, Masahiro Kozako, Tomohiro Kubo, Yusuke Nakano, Aoto Izumi, Takavuki Sakurai, Takahiro Nakamura, Takakazu Matsuzoe, Masayuki Hikita
Publikováno v:
2019 IEEE Electrical Insulation Conference (EIC).
Recently, driving of inverters has been advanced to improve the characteristics of motors. Along with that, concerns are raised that inverter surge deteriorates the insulation system of the motor. The problem of insulation deterioration is particular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ed562b33e6fef93d5f6b03865f4d61e
https://doi.org/10.1109/eic43217.2019.9046520
https://doi.org/10.1109/eic43217.2019.9046520
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 22:516-525
Now that gas-insulated switchgear (GIS) for ac systems are becoming increasingly compact as specifications are rationalized, more consideration of their insulation characteristics for residual dc voltage is required. Furthermore, with dc power transm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4b445ce121b59e0b9cfa003012d7950
https://doi.org/10.1109/tdei.2014.004513
https://doi.org/10.1109/tdei.2014.004513
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 23:1649-1651
When a cylindrical or spheroidal conducting particle resides in an electric field which is quasi-homogeneous over the axis of symmetry of the particle but inhomogeneous in the direction normal to the particle, the particle is subject to a force norma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a16708f2f075822420260f8d2c350825
https://doi.org/10.1109/tdei.2016.005504
https://doi.org/10.1109/tdei.2016.005504
Autor:
Steven A. Boggs, Abe Yuta, Manaho Matsubara, Masafumi Takei, Kenichi Nojima, Takanori Yasuoka, Motoharu Shiiki
Publikováno v:
2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP).
Particle motion in Gas Insulated Switchgear (GIS) is a key factor that affects the insulation reliability of GIS. This paper presents a method to identify the particle parameters necessary for the particle motion simulation through matching of measur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b477d0c7aa3e316001f4fae6095f4bc7
https://doi.org/10.1109/ceidp.2017.8257559
https://doi.org/10.1109/ceidp.2017.8257559
Autor:
Masafumi Takei, Masayuki Sato, Motoharu Shiiki, Steven A. Boggs, Takanori Yasuoka, Xueqin Zhang, Kenichi Nojima
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 21:2062-2069
An existence of an electrostatic force which draws the particle in the direction of increasing field was indicated by FEM analysis. An approximate formula of the electrostatic force was derived analytically and compared with the results of FEM analys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0c8c7fb92f510f09ac1e301b11740bb
https://doi.org/10.1109/tdei.2014.004435
https://doi.org/10.1109/tdei.2014.004435
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 21:1260-1267
Now that gas insulated switchgear (GIS) for ac systems are becoming increasingly compact as specifications are rationalized, more consideration of their insulation characteristics for residual dc voltage is required. Furthermore, with dc power transm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4caf75159732fdd12974c8b9367b7b26
https://doi.org/10.1109/tdei.2014.6832273
https://doi.org/10.1109/tdei.2014.6832273
Autor:
Hidehito Matsuzaki, Motoharu Shiiki, Kenichi Nojima, Xueqin Zhang, Masafumi Takei, Hideyasu Ando
Publikováno v:
Electrical Engineering in Japan. 188:27-35
SUMMARY To suppress metallic particle lift-off in compact gas-insulated switchgear (GIS), a coating with nonlinear resistivity characteristics was developed for the inner surface of the GIS tank. An electrical field analysis that measured the current
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::24258faf43b780889f266c9076050c06
https://doi.org/10.1002/eej.22535
https://doi.org/10.1002/eej.22535
Publikováno v:
2016 IEEE International Conference on Dielectrics (ICD).
The force on a particle in a gas-insulated system is considered in two contexts, viz., (i) the force caused by a field gradient at a conductor surface and (ii) the forces (torques) that drive “firefly” motion at a conductor. These two problems ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::374a62f3e99480c28340cbf23fa401b3
https://doi.org/10.1109/icd.2016.7547766
https://doi.org/10.1109/icd.2016.7547766
Publikováno v:
IEEE Transactions on Power Delivery. 27:1494-1500
The transient grounding impedance of a gas-insulated switchgear (GIS) substation was investigated through measurements on a commercial 300-kV underground substation. Based on the results, the macroscopic transient impedance of the grounding grid was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ae0bf4e6cce999f7a69b7235cd55378
https://doi.org/10.1109/tpwrd.2012.2194724
https://doi.org/10.1109/tpwrd.2012.2194724
Autor:
Shuhei Kaneko, Taketoshi Miyamoto, Shigemitsu Okabe, Masafumi Takei, Kenichi Nojima, Takayuki Kobayashi, Shigeyuki Tsukao
Publikováno v:
Electrical Engineering in Japan. 179:21-28
In recent years, compact gas-insulated switchgear (GIS) has been developed by rationalization of specifications. All of the GIS have been checked for passage of the AC and lightning impulse (LI) withstand test, but DC stress that occurs on an AC GIS
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::077fdeafe32492f24ae3a6aaecc739cc
https://doi.org/10.1002/eej.21233
https://doi.org/10.1002/eej.21233