論文 - 早川 直樹
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Dielectric Properties of Epoxy/Alumina Nanocomposite Influenced by Agglomerates Control 査読有り
M.Kurimoto, H.Okubo, K.Kato, M.Hanai, Y.Hoshina, M.Takei, N.Hayakawa
IEEE Trans. on Dielectrics and Electrical Insulation 17 巻 ( 3 ) 頁： 1268-1275 2010年
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Partial Discharge and Associated Mechanisms for Micro Gap Delamination at Epoxy Spacer in GIS 査読有り
D.A.Mansour, K.Nishizawa, H.Kojima, N.Hayakawa, F.Endo, H.Okubo
IEEE Trans. on Dielectrics and Electrical Insulation 17 巻 ( 3 ) 頁： 861-867 2010年
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Permittivity Characteristics of Epoxy/Alumina Nanocomposite with High Particle Dispersibility by Combining Ultrasonic Wave and Centrifugal Force 査読有り
M.Kurimoto, H.Okubo, K.Kato, M.Hanai, Y.Hoshina, M.Takei, N.Hayakawa
IEEE Trans. on Dielectrics and Electrical Insulation 17 巻 ( 4 ) 頁： 1268-1275 2010年
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Development of 2 MVA Class Superconducting Fault Current Limiting Transformer (SFCLT) with YBCO Coated Conductors 査読有り
M.Kotari, H.Kojima, N.Hayakawa, F.Endo, H.Okubo
Journal of Physics: Conference Series (JPCS) 234 巻 ( 032070 ) 頁： - 2010年
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Surface Charge Accumulation and Partial Discharge Activity for Small Gaps of Electrode/Epoxy Interface in SF6 Gas 査読有り
D.A.Mansour, H.Kojima, N.Hayakawa, F.Endo, H.Okubo
IEEE Trans. on Dielectrics and Electrical Insulation 16 巻 ( 4 ) 頁： 1150-1157 2009年
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Dynamic Thermal Characteristics of HTS Coil for Conduction-cooled SMES 査読有り
H.Kojima, X.Chen, N.Hayakawa, F.Endo, H.Okubo
IEEE Trans. on Applied Superconductivity 19 巻 ( 3 ) 頁： 2036-2039 2009年
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Current Limiting Characteristics of Parallel-Connected YBCO Coated Conductors for High-Tc Superconducting Fault Current Limiting Transformer (HTc-SFCLT) 査読有り
K.Omura, H.Kojima, N.Hayakawa, F.Endo, M.Noe, H.Okubo
IEEE Trans. on Applied Superconductivity 19 巻 ( 3 ) 頁： 1880-1883 2009年
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*Time Variation of Partial Discharge Activity Leading to Breakdown of Magnet Wire under Repetitive Surge Voltage Application 査読有り
N.Hayakawa, H.Inano, Y.Nakamura, H.Okubo
IEEE Trans. on Dielectrics and Electrical Insulation 15 巻 ( 6 ) 頁： 1701-1706 2008年
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*Partial Discharge Activity in Electrical Insulation for High Temperature Superconducting (HTS) Cables 査読有り
H.Okubo, H.Kojima, F.Endo, K.Sahara, R.Yamaguchi, N.Hayakawa
IEEE Trans. on Dielectrics and Electrical Insulation 15 巻 ( 3 ) 頁： 647-654 2008年
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*Self-recovery Characteristics of High-Tc Superconducting Fault Current Limiting Transformer (HTc-SFCLT) with 2G Coated Conductors 査読有り
H.Kojima, S.Ito, N.Hayakawa, F.Endo, M.Noe, H.Okubo
Journal of Physics: Conference Series 頁： 12154 2008年
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*Quench-induced Partial Discharge Characteristics of HTS Cables 査読有り
N.Hayakawa, S.Ueyama, H.Kojima, F.Endo, Y.Ashibe, T.Masuda, M.Hirose
Journal of Physics: Conference Series 頁： 12053 2008年
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Partial Discharge Inception and Propagation Characteristics of Magnet Wire for Inverter-Fed Motor under Surge Voltage Condition 査読有り
N.Hayakawa, M.Morikawa, H.Okubo
IEEE Trans. on Dielectrics and Electrical Insulation 14 巻 ( 1 ) 頁： 39-45 2007年
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Thermal Runaway Characteristics of Bi2212 Coil for Conduction-cooled SMES 査読有り
H.Kojima, N.Hayakawa, S.Noguchi, F.Endo, N.Hirano, S.Nagaya, H.Okubo
IEEE Trans. on Applied Superconductivity 17 巻 ( 2 ) 頁： 1959-1962 2007年
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High-Tc Superconducting Fault Current Limiting Transformer (HTc-SFCLT) with 2G Coated Conductors 査読有り
H.Okubo, C.Kurupakorn, S.Ito, H.Kojima, N.Hayakawa, F.Endo, M.Noe
IEEE Trans. on Applied Superconductivity 17 巻 ( 2 ) 頁： 1768-1771 2007年
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Electrical Insulation Characteristics of HTS Cables under Quench-induced Thermal Stress Condition 査読有り
N.Hayakawa, S.Ueyama, H.Kojima, F.Endo, T.Masuda, M.Hirose
IEEE Trans. on Applied Superconductivity 17 巻 ( 2 ) 頁： 1660-1663 2007年
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Technical Development on Partial Discharge Measurement and Electrical Insulation Techniques for Low Voltage Motors Driven by Voltage Inverters 査読有り
H.Okubo, N.Hayakawa, G.C.Montanari
IEEE Trans. on Dielectrics and Electrical Insulation 14 巻 ( 6 ) 頁： 1516-1530 2007年
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*Breakdown Characteristics of N2O Gas Mixtures for Quasiuniform Electric Field under Lightning Impulse Voltage 査読有り
H.Kojima, O.Kinoshita, N.Hayakawa, F.Endo, H.Okubo, M.Yoshida, T.Ogawa
IEEE Trans. on Dielectrics and Electrical Insulation 14 巻 ( 6 ) 頁： 1492-1497 2007年
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N2O混合ガスの絶縁特性におけるシナジズム効果 査読有り
早川直樹，木下修，小島寛樹，遠藤奎将，吉田昌展，小川達也，大久保仁
電気学会論文誌B 126 巻 ( 11 ) 頁： 1164-1170 2006年
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Streamer and Leader Discharge Propagation Characteristics Leading to Breakdown in Electronegative Gases 査読有り
N.Hayakawa, K.Hatta, S.Okabe, H.Okubo
IEEE Trans. on Dielectrics and Electrical Insulation 113 巻 ( 4 ) 頁： 842-849 2006年
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Impulse and ac Partial Discharge Inception and Breakdown Characteristics of LN2/Polypropylene Laminated Paper Composite Insulation System 査読有り
H.Okubo, H.Kojima, F.Endo, K.Sahara, N.Hayakawa
IEEE Trans. on Dielectrics and Electrical Insulation 113 巻 ( 3 ) 頁： 664-669 2006年