Faculty Profiles - KOZAKO Masahiro

Papers - KOZAKO Masahiro

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Impedance Frequency Analysis of Stator Winding of Electric Motors using Highfrequency Equivalent Circuit Reviewed

K.Miyazaki, T.Kuno, M.Hikita, M.Kozako, T.Okamoto, Y.Inoue, K.Zaizen, T.Yamada, T.Iwanaga

2023 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 2B9 ) 383 - 386 2023.10

Improvement of Partial Discharge Signal Recognition for Power Cable Lines Reviewed International journal

M.Chen, M.Kozako, M.Hikita, N.Takeuchi, Z.Zhou, J.Lu

2023 International Symposium on Electrical Insulating Materials (ISEIM) ( A-1 ) 2023.09

Digest Report of Cooperative Research Committee on EINA Magazine Reviewed International journal

Y.Tanaka, M.Kozako, N.Fuse

2023 International Symposium on Electrical Insulating Materials (ISEIM) ( DR-1 ) 2023.09

Effect of Moisture Content on Temperature Dependence of Partial Discharge Characteristics of Biodegradable Ester Oils Reviewed International journal

T.Okamoto, D.Okumura, M.Tsuchie, M.Hikita, M.Kozako

2023 International Symposium on Electrical Insulating Materials (ISEIM) ( MVP4-6 ) 2023.09

Effect of Carbon Black Addition on Dielectric Breakdown Strength of Alicyclic Epoxy Resins Reviewed International journal

K.Shinozaki, D.Okumura, M.Hikita, M.Kozako

2023 International Symposium on Electrical Insulating Materials (ISEIM) ( MVP3-5 ) 2023.09

LiquidLong-Term Partial Discharge Characteristics till Breakdown in a 22 kV Cast Resin Transformer Reviewed International journal

M.Miyagawa, Y.Yao, R.Koresawa, H.Kawano, M.Hikita, M.Kozako

2023 International Symposium on Electrical Insulating Materials (ISEIM) ( MVP1-5 ) 2023.09

Partial Discharge Detection and Analysis on a Cast Resin Transformer under Lightning Impulse Voltage Reviewed International journal

Y.Yao, M.Miyagawa, R.Koresawa, M.Kozako, M.Hikita, K.Takei, T.Shibata, T.Uzuki, K.Futakawa, H.Ozeki

2023 International Symposium on Electrical Insulating Materials (ISEIM) ( F-4 ) 2023.09

Observation of Changes in Partial Discharge Activity in Artificial Voids Based on Analysis of Φ-q-n Characteristics and Light Reviewed International journal

Y.Aoki, Y.Takeuchi, T.Sakakihara, K.Iida, T.Umemura, M.Kozako

2023 International Symposium on Electrical Insulating Materials (ISEIM) ( P-8 ) 2023.09

Application of Power Line Communication for Online Partial Discharge Monitoring in A Simulated Substation Reviewed International journal

Lunnetta Safura Lumba, Akito Houdai, Masahiro Kozako, Masayuki Hikita, Hidefumi Sato, Masahiro Soeda

The 23rd International Symposium on High Voltage Engineering(ISH2023) ( O7.1.05 ) 2023.08

Effect of Electric Field on Conductivity of Synthetic Ester Reviewed International journal

Rui Yu, Shanika Matharage, Daigo Okumura, Motoo Tsuchie, Masahiro Kozako, Masayuki Hikita, Zhongdong Wang

The 23rd International Symposium on High Voltage Engineering(ISH2023) ( O10.1.06 ) 2023.08

Partial Discharge Characteristics to Breakdown in Cast Resin Transformer Suffering Lightning Impulses to Accelerate Aging Reviewed International journal

Y.Yao, M.Miyagawa, R.Koresawa, M.Kozako, M.Hikita, K.Takei, T.Shibata, T.Uzuki, K.Futakawa

The 23rd International Symposium on High Voltage Engineering(ISH2023) ( O8.1.05 ) 2023.08

Long-Term AC Partial Discharge Characteristics of A 22 kV Cast Resin Transformer in Accelerated Tests Reviewed International journal

M.Miyagawa1, Y.Yao, R.Koresawa, H.Kawano, M.Hikita, M.Kozako, K.Takei, T.Shibata, T.Uzuki, K.Futakawa

The 23rd International Symposium on High Voltage Engineering(ISH2023) ( O8.1.04 ) 2023.08

Effect of Moisture Content on Temperature Characteristics of Dielectric Breakdown Strength of Biodegradable Ester Oils Reviewed

T.Okamoto, D.Okumura, K.Hamasuna, M.Kozako, M.Hikita, M.Tsuchie, M.Maharana, C.Olmo

22nd IEEE International Conference on Dielectric Liquids (ICDL2023) ( 191 ) 2023.06

Impact of Thermal Aging on The Conductivity of Kraft Paper Impregnated with Mineral Oil and Synthetic Ester Reviewed

T.Okamoto, D.Okumura, K.Hamasuna, M.Kozako, M.Hikita, M.Tsuchie, M.Maharana, C.Olmo

22nd IEEE International Conference on Dielectric Liquids (ICDL2023) ( 196 ) 2023.06

Partial Discharge Characteristic Analysis in a 6.6 kV Cast Resin Voltage Transformer Using High-Frequency Distributed Constant Equivalent Circuits Reviewed

R.Koresawa, M.Kozako, M.Hikita, Y.Aoki, K.Iida, T.Umemura, D.Ito, K.Oyama, T.Nakamae, T.Maeda, T.Ozaki

2023 Electrical Insulation Conference (EIC) 87 - 91 2023.06

Proposal for Evaluation of Insulation Performance by Partial Discharge Characteristics of Resin Substrates Containing Micro-Sized Multiple Voids Reviewed

D.Okumura, T.Okamoto, M.Kozako, M.Hikita

2023 Electrical Insulation Conference (EIC) 121 - 124 2023.06

Application of ANFIS and ANN for Partial Discharge Localization in Oil Through Acoustic Emission Reviewed International journal

Hashim A.H.M., Azis N., Jasni J., Radzi M.A.M., Kozako M., Jamil M.K.M., Yaakub Z.(プトラ大学・マレーシア）

IEEE Transactions on Dielectrics and Electrical Insulation ( The IEEE Dielectrics and Electrical Insulation society ) 30 ( 3 ) 1247 - 1254 2023.06

Enhancement of Electrical Insulation Performance using FGM Techniques in Air Insulated HV GIS Reviewed International journal

K.Okamoto, H.Masui, H.Yanase, N.Hayakawa, K.Kato, H.Okubo, M.Kozako, N.Osawa, T.Inoue, K.Adachi

Joint CIGRE SC B3 & A3 Colloquium 2023 ( PS3 ) 2023.05

鉱油中における熱および課電加速劣化したポリビニルホルマール線の絶縁特性 Reviewed

善田優希, 小迫雅裕, 匹田政幸, 大久保祐輔, 下村好亮, 田中剛

電気学会論文誌A 143 ( 3 ) 98 - 104 2023.03

Online and Offline Partial Discharge Measurement in Rotating Machines using Transient Earth Voltage Sensors Reviewed International journal

Lunnetta Safura Lumba, Akito Houdai, Ryota Koresawa, Tsutomu Kuno, Masahiro Kozako, Masayuki Hikita, Kenta Yonemura

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( B1-3 ) 2022.11

AC Partial Discharge Measurements of Aged Cast Resin Transformers after Multiple Impulse Voltage Applications Reviewed International journal

Y.Yao, M.Kozako, R.Koresawa, H.Kawano, M.Hikita, K.Takei, M.Sato, K.Futakawa, H.Sato

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P4-25 ) 2022.11

Investigation of saturation moisture in the PD behavior in the biodegradable ester oil Reviewed International journal

M.Maharana, K.Hamasuna, M.Kozako, M.Hikita, M.Tsuchie, K.Wu

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P4-12 ) 2022.11

APartial Discharge Degradation Analysis from Light Emission Observation and Partial Discharge Characteristic Measurement by Partial Discharge in Artificial Defects Using Reviewed International journal

Y.Aoki, Y.Takeuchi, T.Sakakihara, K.Ida, T.Umemura, M.Kozako, M.Hikita, T.Nakamae, T.Maeda, T.Ozaki

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P3-25 ) 2022.11

A Study of PRPD Statistics to Improve the Performance of PD Detection and Defect Type Identification Reviewed International journal

R.Kai, T.Yamanoue, H.Tanaka, H.Kawano, M.Kozako, M.Hikita

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P3-24 ) 2022.11

Investigation on Dominant Frequency of Partial Discharge Current in 6.6 kV Cast Resin Voltage Transformer Reviewed International journal

R.Koresawa, M.Kozako, M.Hikita, Y.Aoki, K.Iida, T.Umemura, T.Nakamae, T.Maeda, T.Ozaki

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P3-21 ) 2022.11

Long term on-line PD monitoring using power line communication in a distribution substation Reviewed International journal

A.Houdai, Lunnetta Safura Lumba, T.Wakisaka, M.Kozako, M.Hikita, H.Sato, M.Soeda

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P3-20 ) 2022.11

Investigation of Microvoid Detection in Insulating Resin Substrates Based on Partial Discharge Characteristics Reviewed International journal

K.Hamasuna, D.Okumura, M.Kozako, M.Hikita

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P3-17 ) 2022.11

Impulse Pre-stress Effect on AC Partial Discharge Inception Characteristics of Winding Model Sample Reviewed International journal

Y.Zenda, M.Kozako, M.Hikita, Y.Fujii, H.Cho, Y.Nakamura

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P3-15 ) 2022.11

Electrical Conduction Properties of Titanium Added Aluminum Nitride Substrates at High Temperatures and Electric Fields Reviewed International journal

D.Okumura, K.Hamasuna, M.Kozako, M.Hikita, T.Nagami, K.Yamamoto

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( P2-16 ) 2022.11

Study of the Thermal Degradation of Different Insulating Papers Impregnated with a Natural Ester Reviewed International journal

Cristina Méndez Gutiérrez, Cristian Olmo Salas, Carlos Javier Renedo Estébanez, Masahiro Kozako, Masayuki Hikita, Alfredo Ortiz Fernández

9th International Conference on Condition Monitoring and Diagnosis (CMD2022) ( A2-5 ) 2022.11

ボイド含有ポリエステルフィルムの交流部分放電特性に及ぼすインパルス前課電の影響 Reviewed

柳瀬博雅, 満留博, 岡本健次, 小迫雅裕, 匹田政幸

電気学会論文誌A 142 ( 9 ) 375 - 380 2022.09

High Temperature Dielectric Properties of Aluminum Nitride Substrates with Different Amounts of Titanium Reviewed International journal

D.Okumura, K.Hamasuna, M.Kozako, M.Hikita, T.Nagami, K.Yamamoto

International Workshop on Integrated Power Packaging 2022 (IWIPP) ( 5011 ) 2022.08

大学間連携討論型オンライン授業の実施 Reviewed

宮内肇, 末廣純也, 小迫雅裕, 西田貴司, 井上昌睦

工学教育 70 ( 4 ) 160 - 164 2022.07

Prediction of Lifetime in Surge Resistant Enamel Twisted Pair by Partial Discharge Degradation under Repetitive Impulse Voltage Application Reviewed

M.Kozako, Y.Zenda, S.Kodama, M.Hikita, N.Hayashizaka, N.Fujimoto, H.Kikuchi

4th IEEE International Conference on Dielectrics (ICD2022) ( 1b-1 ) 2022.07

Insulation Properties of Twisted-pair of Polyvinyl Formal Wires with Artificial Pinhole and Thermal Stress in Mineral Oil Reviewed

Y.Zenda, S.Kodama, M.Kozako, M.Hikita, Y.Okubo, K.Shimomura, T.Tanaka

4th IEEE International Conference on Dielectrics (ICD2022) ( 3c-6 ) 2022.07

Partial Discharge Monitoring and Diagnosis Utilizing Power Line Communication in a Simulated Substation Reviewed

A.Houdai, R.Koresawa, T.Wakisaka1, M.Kozako, M.Hikita, H.Sato, M.Soeda

2022 Electrical Insulation Conference (EIC) ( PS1-7 ) 132 - 135 2022.06

Effect of Winding Insulation Thickness on Partial Discharge Degradation and Life Characteristics of Enamel Twisted Pair Reviewed

S.Kodama, Y.Zenda, M.Kozako, M.Hikita, N.Hayashizaka, H.Kikuchi

2022 Electrical Insulation Conference (EIC) ( PS2-14 ) 225 - 228 2022.06

Partial discharge detection of cast resin transformers using high-frequency signal propagation characteristic analysis and application to diagnostic technology Reviewed

R.Koresawa, M.Kozako, M.Hikita, Y.Aoki, K.Iida, T.Umemura, T.Nakamae, T.Maeda, T.Ozaki, Y.Nakamura

2022 Electrical Insulation Conference (EIC) ( PS2-4 ) 182 - 185 2022.06

AC Partial Discharge Characteristics in Ester Oil/Pressboard Composite Insulation System with Metallic Protrusion Reviewed

K.Hamasuna, M.Kozako, M.Hikita, S.Yoshida, Y.Yamanaka, T.Umemoto

21th IEEE International Conference on Dielectric Liquids (ICDL2022) ( 108 ) 196 - 199 2022.05

ナノコンポジットエナメル線における絶縁破壊までの部分放電特性と周波数加速等価性 Reviewed

竹之内将, 善田優希, 小迫雅裕, 匹田政幸, 藤本信貴, 林坂徳之, 加藤俊彦, 菊池英行

電気学会論文誌A 142 ( 5 ) 208 - 214 2022.05

Partial Discharge Localization in Oil Through Acoustic Emission Technique Utilizing Fuzzy Logic Reviewed International journal

Ahmad Hafiz Mohd Hashim, Norhafiz Azis, Jasronita Jasni, Mohd Amran Mohd Radzi, Masahiro Kozako, Mohamad Kamarol Mohd Jamil, Zaini Yaakub

IEEE Transactions on Dielectrics and Electrical Insulation 29 ( 2 ) 623 - 630 2022.04

エポキシ樹脂のナノシリカ添加および熱処理における二次電子放出特性 Reviewed

小森あかね, 永田浩二郎, 佐藤孔亮, 三宅弘晃, 田中康寛, 小迫雅裕, 匹田政幸

電気学会論文誌A 142 ( 3 ) 118 - 115 2022.03

位相分解部分放電パターン再構築とニューラルネットワークによる変電所の絶縁診断 Reviewed

藤岡駿弥, 河野英昭, 小迫雅裕, 匹田政幸, 枝修, 谷口修平, 椎名康晴

電気学会論文誌A 142 ( 3 ) 94 - 100 2022.03

Development of Innovative Functional Electrical Insulating Composites Reviewed International journal

M.Hikita, M.Kozako

JOURNAL OF Engineering Science and Technology Review ( 14 ) 2022.01

Partial Discharge Degradation Mechanism of Nanocomposite Enameled Twisted Pair under Repetitive Impulse Voltage Application Reviewed

S.Takenouchi, Y.Zenda, M.Kozako, M.Hikita, N.Fujimoto, N.Hayashizaka, T.Kato, H.Kikuchi

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( C-6 ) 69 - 72 2021.12

Effect of Temperature on RPDIV of Enamel Twisted Pair under Repetitive Impulse Voltage Application with Different Rise Time Reviewed

Y.Zenda, S.Takenouchi, M.Kozako, M.Hikita T.Okamoto, S.Jintong, A.Izumi, K.Karasawa

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 3D-10 ) 648 - 651 2021.12

Characteristics of Breakdown Strength of Hydrocarbon Thermosetting Resin in Low Temperature Environment Reviewed

T.Matsuki, Y.Inoue, K.Hamasuna, M.Kozako, M.Hikita, N.Fukumoto, N.Kamei

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 3D-4 ) 623 - 626 2021.12

Effects of Nano-micro Composite and Shielding on Flashover Characteristics of Gas Insulated Switchgear Spacer Model in Different Lightning Impulse Application Methods Reviewed

Y.Inoue, M.Kozako, M.Hikita, H.Masui, H.Yanase, K.Okamoto

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 3A-5 ) 471 - 474 2021.12

A Study on Simultaneous Measurements of PD Light Emission and Charge in Resin Substrate Reviewed

K.Hamasuna, M.Kozako, M.Hikita

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 1C-15 ) 307 - 310 2021.12

Volume Effect on AC Dielectric Breakdown Strength of Ester Oil Compared with that of Mineral Oil Reviewed

K.Hamasuna, T.Matsuki, M.Kozako, M.Hikita, S.Yoshida, H.Hamada, T.Umemoto

The 22th International Symposium on High Voltage Engineering(ISH2021) ( 748 ) 2021.11

Research Trends in Online Partial Discharge Monitoring and Diagnosis Utilizing ICT in Electric Power Equipment Invited Reviewed

M.Hikita, M.Kozako

2021 3rd International Conference on High Voltage Engineering and Power Systems (ICHVEPS) ( PS1-3 ) 6 - 13 2021.10

モールド変圧器のインピーダンス周波数特性の解明と部分放電診断手法 Reviewed

柿本康朝, 小迫雅裕, 匹田政幸, 飯田和生, 梅村時博, 中村勇介, 中前哲夫, 前田照彦, 尾崎多文

電気学会論文誌A 141 ( 7 ) 420 - 427 2021.07

S6ガス中楔ギャップのインパルス部分放電開始特性に及ぼすエポキシ複合材へのナノフィラー添加の影響 Reviewed

井上好之, 大角浩太郎, 小迫雅裕, 匹田政幸, 増井秀好, 満留博, 柳瀬博雅, 岡本健次

電気学会論文誌A 141 ( 6 ) 391 - 397 2021.06

Effect of Different Types of Fullerene Addition on AC Dielectric Breakdown Strength of Epoxy Resin Reviewed

Ozuno K., Inoue Y., Kozako M., Hikita M., Igarashi T., Kaji H.

IEEE Transactions on Dielectrics and Electrical Insulation 28 ( 2 ) 625 - 629 2021.04

Language：English Publishing type：Research paper (scientific journal)

This research intends to investigate the applicability of fullerene as an electrically insulating filler. So far, the authors reported that the addition of a very small amount of fullerene C60 to epoxy resin (EP) improves the dielectric breakdown strength $(E_{\mathrm{b}})$ by about 30%. This report presents the study on the effect of four different types of fullerenes as fillers added to EP on the improvement of $E_{\mathrm{b}}$. Fullerenes used are mixtures of C60 and higher order one $\mathrm{C}_{70}$ with a different mixture rate, and the addition effect of sublimation-purified fullerene on $E_{\mathrm{b}}$ is also investigated. Experimental results reveal that samples added with sublimated fullerenes exhibit larger $E_{\mathrm{b}}$ than that of samples without sublimation. The sublimation-purified sample is also found to give almost no difference in $E_{\mathrm{b}}$ by the type or proportion of the added fullerenes $\mathrm{C}_{60}$ and $\mathrm{C}_{70}$. An attempt is also made to discuss the mechanism of the improvement effect on $E_{\mathrm{b}}$ of fullerene by evaluating the electronic state of epoxies with different fullerene fillers and curing agent using quantum chemical calculation. As a result, it is shown that the introduction of $\mathrm{C}_{60}$ and $\mathrm{C}_{70}$ into the EP considering the curing agent introduces electron traps of 0.64 and 0.72 eV, respectively. It is interpreted that the introduced electron traps suppress the electron avalanche, and consequently improves the breakdown strength.

DOI： 10.1109/TDEI.2021.009360

Scopus

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Characteristics of Creepage Discharge in Oil/Pressboard Composite Insulation Reviewed

Yoshida S., Kozako M., Hikita M.

IEEE Transactions on Dielectrics and Electrical Insulation 28 ( 2 ) 608 - 615 2021.04

Language：English Publishing type：Research paper (scientific journal)

This paper deals with partial discharge characteristics in oil/pressboard composite insulation system, which is used in oil-immersed power transformer. It is found that the discharge propagates in the same route on the pressboard surface as in the previous discharge every time under repeated impulse voltage application. We also revealed that the white trace remained along the path of discharge and affected the subsequent discharge progress because of being a weak point part on insulation. This study presents an investigation of the effect of the white trace on partial discharge inception voltage (PDIV) of the composite insulation system with high-speed optical observation and electrical measurements for the discharge propagation. The discharge propagation mechanism is also discussed with comparing the discharge progress characteristics before and after the white trace formation.

DOI： 10.1109/TDEI.2020.009313

Scopus

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2A15 Implementation of Inter-University Collaborative On-line Discussion Type Class Reviewed

SUEHIRO Junya, KOZAKO Masahiro, MIYAUCHI Hajime, NISHIDA Takashi, INOUE Masayoshi

Proceedings of Annual Conference of Japanese Society for Engineering Education ( Japanese Society for Engineering Education ) 2021 ( 0 ) 138 - 139 2021.01

Construction and Experimental Verification of Novel Online Partial Discharge Monitoring System Using Power Line Communication Reviewed

Kakimoto Y., Yoshikawa H., Jogo T., Wakisaka T., Kozako M., Hikita M., Sato H., Tagashira H., Soeda M.

IEEE Transactions on Dielectrics and Electrical Insulation 27 ( 6 ) 2165 - 2171 2020.12

Language：English Publishing type：Research paper (scientific journal)

© 1994-2012 IEEE. In this research, we aim to construct a completely new partial discharge (PD) monitoring system that applies inexpensive power line communication (PLC). We have proposed a PD detection method and monitoring system (PDMS-PLC) on the basis of PLC signal transfer rare is affected by an error due to disturbance. An attempt is made to identify PD source from the quadrant dependence of information transmission rate (hereinafter referred to PHY rate [Mbps]) by selecting a pair of quadrants of applied voltage phase; i.e. 1st and 3rd quadrants, or 2nd and 4th ones. It was found that the PHY (Abbreviation for the lowest physical layer in the OSI (open systems interconnection) hierarchical model.) rate number distribution reflects the PD characteristics obtained by the phase resolved PD (PRPD) pattern. Environmental noise level is also measured at an actual substation using PDMS-PLC. Consequently, the applicability of PDMS-PLC to PD signal detection and defect type identification is suggested.

DOI： 10.1109/TDEI.2020.009081

Scopus

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Digest Report of Cooperative Research Committee on EINA Magazine Publication Reviewed

Y.Kakimoto, H.Yoshikawa, T.Jogo, T.Wakisaka, M.Kozako, M.Hikita, H.Sato, M.Soeda, H.Tagashira

The 2020 International Conference on Condition Monitoring and Diagnosis (CMD2020) ( 457 ) 2020.10

Long-term Online Partial Discharge Trend Monitoring for Cast Resin Transformers in Switchboard Reviewed

Y.Kakimoto, T.Jogo, M.Kozako, M.Hikita, M.Sato, H.Abe, M.Hirokawa, H.Sato

The 2020 International Conference on Condition Monitoring and Diagnosis (CMD2020) ( 458 ) 2020.10

Digest Report of Cooperative Research Committee on EINA Magazine Publication Reviewed

M.Nagao, Y.Inoue, M.Kozako, N.Fuse

2020 International Symposium on Electrical Insulating Materials (ISEIM) ( DR-8 ) 2020.09

Digest Report of Investigating R&D Committee on Electrical Insulation Reliability of Power Modules Reviewed

M.Kozako, N.Kishi, Y.Hayase

2020 International Symposium on Electrical Insulating Materials (ISEIM) ( DR-4 ) 2020.09

Discharge Inception Characteristics Analysis of Epoxy/Silica Nanocomposites in SF6 Gas Using Volume-time Theory Reviewed

Y.Inoue, K.Ohzuno, M.Kozako, M.Hikita, H.Masui, H.Mitsudome, H.Yanase, K.Okamoto

2020 International Symposium on Electrical Insulating Materials (ISEIM) ( VL-7 ) 2020.09

Examination of Impulse PD Inception Location by Electric Field Analysis in Ester Oil/Pressboard Composite Insulation System Reviewed

T.Yamada, M.Kozako, M.Hikita, S.Yoshida, H.Hamada, T.Umemoto

2020 International Symposium on Electrical Insulating Materials (ISEIM) ( VL-6 ) 2020.09

Optimization of Partial Discharge Detection Sensitivity of Transient Earth Voltage Sensors Using FDTD Modeling Reviewed

S.Hari Wibowo, U.Khayam, Suwarno, Y.Kakimoto, M.Kozako, M.Hikita

2020 International Symposium on Electrical Insulating Materials (ISEIM) ( VJ-8 ) 2020.09

Proposal of Noise Rejection in Automatic Measurement System of Repetitive Partial Discharge Inception Voltage Reviewed

Y.Nishigaki, S.Takenouchi, M.Kozako, M.Hikita, T.Nakamura, J.Sun, A.Izumi, T.Sakurai, K.Karasawa,T.Hirose

2020 International Symposium on Electrical Insulating Materials (ISEIM) ( VJ-7 ) 2020.09

Dielectric Breakdown Characteristic of Refining Treatment Fullerene Doped Epoxy Plate-like Specimens Reviewed

K.Agung Satria, K.Ozuno, Y.Inoue, M.Kozako, M.Hikita, Suwarno, U.Khayam, T.Igarashi, H.Kaji

2020 International Symposium on Electrical Insulating Materials (ISEIM) ( VF-5 ) 2020.09

V-t Characteristics of Twisted-pair with Polyvinyle Formal Wires Undergoing Thermal Stress in Mineral Oil Reviewed

M.Hikita, Y.Nishigaki, S.Takenouchi, T.Matsuzoe, M.Kozako, K.Shimomura, S.Kawakami, T.Tanaka

2020 International Conference on Dielectrics (ICD) 130 - 133 2020.07

Impulse Flashover Characteristics in SF Gas for Insulating Spacer Model of GIS Fabricated Using Nano-micro Composites Reviewed

Y.Inoue, K.Abe, K.Ohzuno, M.Kozako, M.Hikita, H.Masui, H.Mitsudome, H.Yanase, K.Okamoto

2020 International Conference on Dielectrics (ICD) 810 - 813 2020.07

Comparison of the Effect of Thermal Aging on Dielectric Properties of Vegetable Oils and Impregnated Kraft Paper Reviewed

C.Méndez Gutiérrez, H.Araki, T.Yamada, M.Tsuchie, M.Kozako, M.Hikita, A.Ortiz Fernández

2020 International Conference on Dielectrics (ICD) 732 - 735 2020.07

Field Grading Material electrodeposition - challenges Reviewed

G.Belijar, L.Fetouhi, M.Kozako, M.Hikita

2020 International Conference on Dielectrics (ICD) 289 - 292 2020.07

Partial Discharge Properties till Breakdown of Boehmite Added Enameled Twisted Pair under Bipolar Repetitive Impulse Voltage Application Reviewed International journal

S.Takenouchi, Y.Nishigaki,T.Matsuzoe, M.Kozako, M.Hikita, N.Fujimoto, N.Hayashizaka, T.Kato, H.Kikuchi

2020 Electrical Insulation Conference (EIC) ( 2286 ) 2020.06

High Temperature Partial Discharge Inception Voltage under Repetitive Impulse Voltage Applied to Motorette Samples Reviewed International journal

Y.Nishigaki, T.Matsuzoe, S.Takenouchi, M.Kozako, M.Hikita, T.Nakamura, S.Jintong, A.Izumi, T.Sakurai, K.Karasawa, S.Hiroshima

2020 Electrical Insulation Conference (EIC) ( 2287 ) 2020.06

前課電による空間電荷蓄積が部分放電開始電圧へ与える影響 Reviewed

美馬まいみ, 成田迅宏, 三宅弘晃, 田中康寛, 小迫雅裕, 匹田政幸

電気学会論文誌A 140 ( 5 ) 276 - 284 2020.05

電力線搬送通信を用いた新しいオンライン部分放電監視システムの構築 Reviewed

吉川雛, 柿本康朝, 小迫雅裕, 匹田政幸, 里秀文, 田頭秀樹, 副田正裕

電気学会論文誌A 140 ( 4 ) 261 - 262 2020.04

炭化水素系熱硬化性樹脂の電気絶縁特性に及ぼすフラーレン添加の影響 Reviewed

大角浩太郎, 阿部和馬, 小迫雅裕, 匹田政幸, 亀井伸人

電気学会論文誌A 140 ( 4 ) 241 - 246 2020.04

Electrical characteristics of double-sided cooling SiC power module using Ni micro plating bonding Reviewed

T.Itose, A.Kawagoe, A.Imakiire, M.Kozako, M.Hikita, K.Tatsumi, T.Iizuka, I.Morisako, N.Sato, K.Shimizu, K.Ueda, K.Sugiura, K.Tsuruta

11th International Conference on Integrated Power Electronics Systems(CIPS) 422 - 427 2020.03

モールド変圧器におけるUHF法および照射X線走査を用いた新規部分放電位置標定 Reviewed

匹田政幸, 飯田和生, 梅村時博, 中村勇介, 中前哲夫, 前田照彦, 東山雅一

電気学会論文誌A 140 ( 3 ) 162 - 168 2020.03

Construction of Novel Online Partial Discharge Monitoring System in Model Power Apparatus Using Power Line Communication Reviewed International journal

H.Yoshikawa, S.Masuda, Y.Kakimoto, N.Puspitasari, Y.Nakano, M.Kozako, M.Hikita, H.Sato, H.Tagashira, K.Ishida

Proceedings of the 21st International Symposium on High Voltage Engineering 1 635 - 642 2019.11

Diagnostics For Vacuum Degree Of Vacuum Interrupter Based On Partial Discharge Mechanisms Under Medium Vacuum Level Reviewed International journal

Y.Nakano, M.Kozako, M.Hikita, T,Tanaka, M.Kobayashi

Proceedings of the 21st International Symposium on High Voltage Engineering 1 673 - 683 2019.11

Propagation Characteristics of Partial Discharge Radiated Electromagnetic Waves for Insulation Diagnosis of Oil-Filled Bushing Reviewed International journal

T.Fujimura, S.Masuda, M.Kozako, M.Hikita, T.Yamamoto, S.Okabe, M.Nakahata

Proceedings of the 21st International Symposium on High Voltage Engineering 1 662 - 672 2019.11

Partial Discharge Measurement and Its High Frequency Characteristics in Cast Resin Transformer Reviewed International journal

T.Fujimura, S.Masuda, M.Kozako, M.Hikita, T.Umemura, K.Iida, Y.Nakamura, T.Nakamae, T.Maeda, M.Higashiyama

Proceedings of the 21st International Symposium on High Voltage Engineering 1 653 - 661 2019.11

Identification Of Partial Discharge Source In Power Apparatus In Practical Substation Utilizing Artificial Neural Network Reviewed International journal

Y.Kakimoto, P.Nuraida, H.Yoshikawa, T.Fujimura, M.Kozako, M.Hikita, O.Eda, Y.Shiina, M.Otsuka, H.Kaneko

Proceedings of the 21st International Symposium on High Voltage Engineering 1 643 - 652 2019.11

Discharge characteristics and mechanisms under the medium vacuum region in a vacuum interrupter Reviewed

Nakano Y., Masuda S., Kozako M., Hikita M., Tanaka T., Kobayashi M.

IEEJ Transactions on Electrical and Electronic Engineering 14 ( 11 ) e1 - e6 2019.11

Language：English Publishing type：Research paper (scientific journal)

© 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. This article deals with discharge characteristics and mechanisms in the medium vacuum range of 1–1000 Pa in a vacuum interrupter (VI), which consists of complex electrode configuration with an electrode of floating potential and an insulator. Gas leakage was simulated by enclosing air or SF6 gas. From a measured discharge current and a shield potential, the discharge characteristics inside the VI at each pressure were discussed. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

DOI： 10.1002/tee.23019

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Investigation for influence of space charge accumulation in motor winding coating material on partial discharge inception voltage Reviewed

T.Narita, M.Mima, H.Miyake, Y.Tanaka, M.Kozako, M.Hikita

2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 6D-2 ) 718 - 721 2019.10

Estimation of Electron Trap in Hydrocarbon-Based Thermosetting Resin/Fullerene Composite by Computational Science Reviewed

K.Ohzuno, K.Abe, M.Kozako, M.Hikita, N.Kamei

2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 8-2 ) 839 - 842 2019.10

Partial Discharge Inception Voltage Characteristics for Nano-micro Composites under Impulse Voltage in SF6 Gas Reviewed

K.Abe, K.Ohzuno, M.Kozako, M.Hikita, H.Mitsudome, H,Yanase, K.Okamoto

2019 IEEE Conference on Electrical Insulation and Dielectric Phenomena(CEIDP) ( 6D-7 ) 738 - 741 2019.10

DetectingVacuum Degree Condition of Vacuum Interrupter by Partial Discharge Measurement Reviewed

A.S.Habibie, M.Hikita, M.Kozako, Y. Nakano, Suwarno, U. Khayam, M.Kobayashi

5th International Conference on Electric Power Equipment -Switching Technology(ICEPE-ST 2019) ( C-4-1 ) 193 - 196 2019.10

Niメッキ接合を用いたSiCパワーモジュールの熱抵抗と過渡熱解析 Reviewed

今給黎明大, 小迫雅裕, 匹田政幸, 巽宏平, 稲垣雅一, 飯塚智徳, 佐藤信明, 清水孝司, 上田和敏, 杉浦和彦, 鶴田和弘, 戸田敬二

電気学会論文誌D 139 ( 10 ) 838 - 846 2019.10

Estimation method of degraded vacuum in vacuum interrupter based on partial discharge measurement Reviewed

Nakano Y., Kozako M., Hikita M., Tanaka T., Kobayashi M.

IEEE Transactions on Dielectrics and Electrical Insulation 26 ( 5 ) 1520 - 1526 2019.10

Partial Discharge Waveform Identification using Image with Convolutional Neural Network Reviewed International journal

Puspitasari N., Khayam U., Suwarno , Kakimoto Y., Yoshikawa H., Kozako M., Hikita M.

2019 54th International Universities Power Engineering Conference, UPEC 2019 - Proceedings 2019.09

Construction of Novel Online Partial Discharge Monitoring System in Model Power Apparatus using Power Line Communication Reviewed

H.Yoshikawa, S.Masuda, Y.Kakimoto, N.Puspitasari, Y.Nakano, M.Kozako, M.Hikita, H.Sato, H.Tagashira, K.Ishida

The 21th International Symposium on High Voltage Engineering(ISH2019) ( 853 ) 1 - 8 2019.08

Numerical Simulation For Creepage Discharge In Oil/Pressboard Composite Insulation System With Multiple Pressboards Reviewed

S.Yoshida, T.Yamada, Y.Nakano, M.Kozako, M.Hikita

The 21th International Symposium on High Voltage Engineering(ISH2019) ( 1096 ) 2019.08

Diagnostics For Vacuum Degree Of Vacuum Interrupter Based On Partial Discharge Mechanisms Under Medium Vacuum Level Reviewed

Y.Nakano, M.Kozako, M.Hikita, T,Tanaka, M.Kobayashi

The 21th International Symposium on High Voltage Engineering(ISH2019) ( 887 ) 1 - 11 2019.08

Propagation Characteristics of Partial Discharge Radiated Electromagnetic Waves for Insulation Diagnosis of Oil-Filled Bushing Reviewed

T.Fujimura, S.Masuda, M.Kozako, M.Hikita, T.Yamamoto, S.Okabe, M.Nakahata

The 21th International Symposium on High Voltage Engineering(ISH2019) ( 881 ) 1 - 10 2019.08

Partial Discharge Measurement and Its High Frequency Characteristics in Cast Resin Transformer Reviewed

T.Fujimura, S.Masuda, M.Kozako, M.Hikita, T.Umemura, K.Iida, Y.Nakamura, T.Nakamae, T.Maeda, M.Higashiyama

The 21th International Symposium on High Voltage Engineering(ISH2019) ( 872 ) 1 - 8 2019.08

Identification Of Partial Discharge Source In Power Apparatus In Practical Substation Utilizing Artificial Neural Network Reviewed

Y.Kakimoto, P.Nuraida, H.Yoshikawa, T.Fujimura, M.Kozako, M.Hikita, O.Eda, Y.Shiina, M.Otsuka, H.Kaneko

The 21th International Symposium on High Voltage Engineering(ISH2019) ( 869 ) 1 - 11 2019.08

Effect of lightning impulse prestress on AC partial discharge characteristics in cast resin transformer Reviewed

208 ( 1-2 ) 10 - 16 2019.07

Discharge characteristics with impulse voltage application in ester oil/pressboard composite Reviewed

T.Yamada, Y.Nakano, M.Kozako, M.Hikita, S.Yoshida, S.Kainaga, M.Yoshimura, K.Suga

IEEE International Conference on Dielectric Liquids (ICDL2019) ( 1198 ) 2019.06

Temperature Dependence of RPDIV of Motorette Sample with Varnish Treatment Reviewed

Y.Nishigaki, T.Matsuzoe , T.Kubo, Y.Nakano, M.Kozako, M.Hikita, T.Nakamura, J.Sun, A.Izumi, T.Sakurai K.Karasawa, K.Nojima

2019 Electrical Insulation Conference (EIC) ( P-1-5 ) 18 - 21 2019.06

Dielectric and Insulation Propertiesof Polyimide-based Boehmite Nanocomposite Material Reviewed

T.Matsuzoe, N.Kita, Y.Nishigaki,T. Abe, T.Kubo, Y.Nakano, M.Kozako, M.Hikita, N.Fujimoto, N.Hayashizaka, S.Fujimoto, T.Kato

2019 Electrical Insulation Conference (EIC) ( P-3-1 ) 83 - 86 2019.06

Partial discharge detection method for vacuum leakage diagnosis of a vacuum interrupter Reviewed

14 ( 6 ) 819 - 824 2019.06

開閉インパルス電圧繰返し重畳と油隙内部の状態が油浸紙-絶縁油複合絶縁系の部分放電特性に与える影響 Reviewed

吉積弘将, 小迫雅裕, 匹田政幸, 藤井祐樹, 中村勇介, 長広明

電気学会論文誌B 139 ( 6 ) 446 - 454 2019.06

Development and evaluation of SiC inverter using Ni micro plating bonding power module Reviewed

A.Kawagoe, T.Itose, A.Imakiire, M.Kozako, M.Hikita, K.Tatsumi, T.Iizuka, I.Morisako, N.Sato, K.Shimizu, K.Ueda, K.Sugiura, K.Tsuruta, K.Toda

2019 IEEE International Workshop on Integrated Power Packaging, IWIPP 2019 36 - 39 2019.04

Drastic Change in Non-Linear Resistive Materials I(V) Characteristics Reviewed

Belijar G., Hermette L., Kozako M., Hikita M.

2019 IEEE International Workshop on Integrated Power Packaging, IWIPP 2019 97 - 101 2019.04

Construction and verification of novel insulation defect location system with high space resolution for next generation power module Reviewed

325 - 328 2019.04

High temperature dielectric property of silicon nitride insulating substrate for next generation power module up to 350 degrees Celsius. Reviewed

444 - 448 2019.04

過渡接地電圧法による部分放電信号の低周波成分伝搬メカニズムの考察 Reviewed

吉積弘将, 小迫雅裕, 匹田政幸, 藤井祐樹, 中村勇介, 長広明

電気学会論文誌A 139 ( 3 ) 154 - 160 2019.03

マイクロ発泡皮膜電線の部分放電開始電圧に及ぼす巻付け時の機械的ストレスの影響 Reviewed

久保智洋, 前田健太, 小迫雅裕, 匹田政幸, 福田秀雄, 池田佳祐, 冨澤恵一, 武藤大介

電気学会論文誌A 139 ( 3 ) 161 - 166 2019.03

Volume-Time理論を用いた発泡皮膜線ツイストペアのインパルス部分放電開始電圧の推定 Reviewed

前田健太, 久保智洋, 小迫雅裕, 匹田政幸, 福田秀雄, 池田佳祐, 冨澤恵一, 武藤大介

電気学会論文誌A 139 ( 3 ) 167 - 173 2019.03

研究調査委員会レポート:パワーモジュールの電気絶縁信頼性に関する調査専門委員会 Reviewed

小迫雅裕, 早瀬悠二, 岸直哉

IEEJ Transactions on Fundamentals and Materials ( The Institute of Electrical Engineers of Japan ) 139 ( 9 ) NL9_4 - NL9_4 2019.01

Study on static electrification of the PFAE-mineral oil mixture Reviewed

Rajab A., Gumilang H., Tsuchie M., Kozako M., Hikita M., Suzuki T.

IOP Conference Series: Materials Science and Engineering 602 ( 1 ) 2018.11

Discharge Characteristics and Mechanisms under Medium Vacuum Region in Vacuum Interrupter Reviewed

Y.Nakano, S.Masuda, M.Kozako, M.Hikita, T.Tanaka, M.Kobayashi

The 11th International Workshop on High Voltage engineering (IWHV2018) ( ED-18-092 SP-18-044 HV-18-126 ) 2018.11

Electric Field Relaxation Effect of Micro-varistor/epoxy Composite Reviewed

2018-October 167 - 170 2018.10

Evaluation of Dielectric Strength of Tricyclopentadiene / Silica Microcomposites Reviewed

2018-October 594 - 597 2018.10

Basic Study on Partial Discharge Detection with High Sensitivity using Ferrite Core Reviewed

( P62 ) 2018.09

Design and Fabrication of 3-D Cube UHF Antenna for Partial Discharge Detection Reviewed

( P68 ) 2018.09

Simulation of Electromagnetic Wave and Surface Current Caused by PD for Seeking Better Detection Sensitivity by TEV Sensor Attached with a Bucket Reviewed

( P12 ) 2018.09

Partial Discharge Location in Cast Resin Transformer by Multiple Small Loop Sensors Reviewed

( P64 ) 2018.09

Estimation of Internal Pressure of Vacuum Interrupter by Measuring Partial Discharge Current Reviewed

2 611 - 614 2018.09

Discussion on Partial Discharge Measurement Technique of Cable Joint in Three Phase High Voltage Overhead Transmission Line Reviewed

( P61 ) 2018.09

Determination of Type of Partial Discharge in Cubicle-Type Gas Insulated Switchgear (C-GIS) using Artificial Neural Network Reviewed

( P10 ) 2018.09

Determination of Partial Discharge Location in Stator Core using Loop Sensors Reviewed

( P175 ) 2018.09

Consideration of Generation Mechanism of Low Frequency Component of Partial Discharge Signal Detected by Transient Earth Voltage Reviewed

( P63 ) 2018.09

Classification of Partial Discharge Sources using Waveform Parameters and Phase-Resolved Partial Discharge Pattern as Input for the Artificial Neural Network Reviewed

( P9 ) 2018.09

モールド変圧器の交流部分放電特性に及ぼす雷インパルスプレストレスの影響 Reviewed

丸山裕史, 松尾賢介, 小迫雅裕, 匹田政幸, 飯田和生, 梅村時博, 中村勇介, 中前哲夫, 前田照彦, 東山雅一

電気学会論文誌A 138 ( 8 ) 422 - 427 2018.08

Impedance Network Modeling of non-linear Restistive Material Reviewed

( 203 ) 2018.07

Partial Discharge Inception Voltage of Enameled Cellular Wire under Impulse Voltage Reviewed

( 3 ) 2018.07

Influence of Electromagnetic Sensor Location on Repetitive Partial Discharge Inception Voltage in Actual Stator Core of Inverter Fed Motor Reviewed

435 - 438 2018.06

Properties of thermally aged natural esters used as insulating liquid Reviewed

10 ( 2 ) 220 - 231 2018.06

PD behaviors of monoester insulating oil under different moisture contents Reviewed

16 ( 2 ) 481 - 487 2018.04

Simulation of Electrical Characteristics for Misalignment of Coil in Wireless Power Transfer System Using Repeating Coil Reviewed

A.Imakiire, H.Tokunaga, A.Kawagoe, M.Kozako, M.Hikita

The 6th IIAE International Conference on Industrial Application Engineering 2018( ICIAE2018) ( 18 ) 81 - 88 2018.03

Novel Partial Discharge Location Algorithm for Next Generation Power Module using Small Loop Sensors Reviewed

J.Maki, Y.Akinaga, M.Kozako, M.Hikita, Y.Nakamura, K.Taniguchi, Y.Ikeda, K.Okamoto

10th International Conference on Integrated Power Electronics Systems(CIPS) ( P2.12 ) 186 - 191 2018.03

Dielectric Properties and Partial Discharge Inception Voltage of Aluminum Nitride Insulating Substrate at High Temperatures Reviewed

T.Abe, M.Suenaga, A.Imakiire, M.Kozako, M.Hikita, H.Shiota, T.Nishimura, H.Muto

10th International Conference on Integrated Power Electronics Systems(CIPS) ( P2.6 ) 155 - 160 2018.03

Thermal Characteristic Evaluation and Transient Thermal Analysis of Next-generation SiC Power Module at 250 °C Reviewed

A.Imakiire, M.Kozako, M.Hikita, K.Tatsumi, M.Inagaki, T.Iizuka, H.Narimatsu, N.Sato, K.Shimizu, K.Ueda, K.Sugiura, K.Tsuruta, M.Iida, K.Toda

10th International Conference on Integrated Power Electronics Systems(CIPS) ( P2.9 ) 174 - 179 2018.03

Aging properties of monoesters and comparison with tri-ester and mineral oil Reviewed

Rajab A., Tsuchie M., Kozako M., Hikita M., Suzuki T.

2017 IEEE 19th International Conference on Dielectric Liquids, ICDL 2017 2017-January 1 - 4 2017.11

Examination on Permittivity Estimation of Hydrocarbon-based Thermosetting Resin based on Quantum Chemical Calculation Reviewed

Fuchi Yuki, Nakasako Ryota, Kozako Masahiro, Hikita Masayuki, Kamei Nobuhito

IEEJ Transactions on Fundamentals and Materials 137 ( 11 ) 626 - 631 2017.11

PD Pattern of Various Defects measured by TEV sensor Reviewed

H.Prasetia, U.Khayam, Suwarno, A.Itose, M.Kozako, M.Hikita

International Conference on High Voltage Engineering and Power Systems (ICHVEPS2017) ( TS1-3 ) 12 - 17 2017.10

Basic study on measurement of electromagnetic waves emitted by partial discharge in cable joint for high voltage overhead transmission Reviewed

2 547 - 550 2017.09

Comparison of insulation characteristics in electrode system with silica filled hydrocarbon-based thermosetting resin Reviewed

2 532 - 534 2017.09

Digest Report of Investigating R&D Committee on Advancing Tailor-made Composite Insulation Materials Reviewed

( DR-5 ) xiv 2017.09

Digest Report of Cooperative Research Committee on EINA Magazine Reviewed

( DR-1 ) x 2017.09

Repetitive Impulse Voltage Supply and Automatic RPDIV Measuring System Reviewed

( DM-7 ) 794 - 795 2017.09

The influence of switching impulse voltage superimposition on partial discharge characteristics of oil impregnated paper insulation system and conditions inside its oil gap defect Reviewed

1 399 - 402 2017.09

Sensitivity characteristics of partial discharge electromagnetic sensor located in stator core Reviewed

2 680 - 683 2017.09

Propagation characteristics of acoustic wave induced by partial discharge in IGBT module Reviewed

2 668 - 671 2017.09

Preparation of fullerene/epoxy resin composite with fine dispersion and its breakdown strength Reviewed

2 654 - 656 2017.09

Permittivity estimation of hydrocarbon-based thermosetting resin using quantum chemical calculation Reviewed

2 524 - 527 2017.09

Influence of electrode interface on insulation property of hydrocarbon-based thermosetting composite with silica filler Reviewed

2 528 - 531 2017.09

Grounding effect on transient earth voltage signal induced by partial discharge in metal box model Reviewed

2 555 - 558 2017.09

Evolution of PD properties till breakdown in silicon nitride substrate molded with resin Reviewed

2 664 - 667 2017.09

Effects of tracking and erosion resistance of nano-boehmite added silicone rubber Reviewed

1 29 - 31 2017.09

到達時間差法を用いたパワーモジュール内部の部分放電発生位置評定の高精度化検討 Reviewed

秋永優也, 真木洵耶, 満留博, 小迫雅裕, 匹田政幸, 岡本健次, 池田良成, 谷口克己, 中村瑤子

スマートプロセス学会誌 6 ( 5 ) 175 - 180 2017.09

AC Partial Discharge Characteristics and Accumulation Charge after Lightning Impulse in Cast Resin Transformer Reviewed

H.Maruyama, M.Kozako, M.Hikita, K.Iida, T.Umemura, Y.Nakamura, T.Maeda, M.Higashiyama, T.Nakamae

The 20th International Symposium on High Voltage Engineering(ISH2017) ( 416 ) 1 - 5 2017.08

PARTIAL DISCHARGE INCEPTION VOLTAGE MEASUREMENT AND ITS ESTIMATION BY VOLUME-TIME THEORY FOR SF6/PET INSULATED WEDGE GAP UNDER IMPULSE VOLTAGE Reviewed

K.Maeda, M.Kozako, M.Hikita, S.Yoshida, T.Chigiri

The 20th International Symposium on High Voltage Engineering(ISH2017) ( 441 ) 1 - 6 2017.08

Dielectric properties and creepage discharge of epoxy/silica nanocomposite in mineral oil Reviewed

19th IEEE International Conference on Dielectric Liquids 2014 (ICDL2017) 2017-January ( 1196 ) 1 - 4 2017.06

Aging Properties of Monoesters and Comparison with Tri-ester and Mineral Oil Reviewed

A.Rajab, M.Tsuchie, M.Kozako, M.Hikita, T.Suzuki

19th IEEE International Conference on Dielectric Liquids 2014 (ICDL2017) ( 1201 ) 2017.06

Electrical insulation performance evaluation of PVF wire under thermal and electrical accelerated aging Reviewed

19th IEEE International Conference on Dielectric Liquids 2014 (ICDL2017) 2017-January ( 1180 ) 1 - 4 2017.06

Effect of discharge trace on creeping discharge characteristics in oil/pressboard composite insulation system under impulse voltage application Reviewed

2017-January ( 1126 ) 1 - 5 2017.06

High accuracy partial discharge location in power module using multiple loop sensors Reviewed

( 1009 ) 2017.04

Investigation of prototype SiC power module structure for low inductance and high heat operation Reviewed

IEEE International Workshop On Integrated Power Packaging (IWIPP2017) ( 1032 ) 2017.04

Evaluation on Applicability to Electrical Insulating Material of Hydrocarbon-Based Thermosetting Resin Reviewed

100 ( 4 ) 83 - 90 2017.04

Effect of White Discharge Trace on Impulse Creeping Discharge Characteristics in Oil/Pressboard Composite Insulation System Reviewed

Akahoshi Takao, Jang Kyunghoon, Kozako Masahiro, Hikita Masayuki, Kainaga Soichiro, Yoshida Shigeyoshi, Umemoto Takahiro, Yoshimura Manabu, Tsurimoto Takao

IEEJ Transactions on Fundamentals and Materials 137 ( 4 ) 188 - 195 2017.04

Impulse creepage discharge properties of solid coated pressboard/oil composite insulation with rod-plane electrode system Reviewed

IEEJ Transactions on Fundamentals and Materials 137 ( 2 ) 113 - 118 2017.02

Non-empirical (ab initio) molecular orbital method Reviewed

345 - 351 2017.01

Low thermal fault gases of various natural monoesters and comparison with mineral oil Reviewed

23 ( 6 ) 3421 - 3428 2016.12

Experimental Verification of Operation and Method of Decision of Maximum DC Link Voltage in Wireless Power Transfer System Reviewed

IEEE TENCON 2016 - Technologies for Smart Nation 797 - 800 2016.11

Dependence of Silica Nano Filler added to Epoxy Resin on Creepage Discharge Properties in Mineral Oil Reviewed

10th International Workshop on High Voltage Engineering and 2016 Japan-Korea Joint Symposium on Electrical Discharge and High Voltage Engineering (IWHV2016 & JK2016) ( ED-16-116 SP-16-045 HV-16-101 ) Vol.1,73 - Vol.1,76 2016.11

EARLY DETERIORATION OF PALM FATTY ACID ESTERS (PFAE) OIL Reviewed

10th International Workshop on High Voltage Engineering and 2016 Japan-Korea Joint Symposium on Electrical Discharge and High Voltage Engineering (IWHV2016 & JK2016) ( ED-16-142 SP-16-071 HV-16-127 ) Vol.2,37 - Vol.2,40 2016.11

Comparison of Electrical Insulation Properties of Hydrocarbon-based - Thermosetting Resin and Epoxy Resin Reviewed

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2016) ( 3A-18 ) 133 - 136 2016.10

Partial Discharge and Breakdown Characteristics of Inverter-fed Motor Winding with Micro Cellular Coating Reviewed

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2016) ( 4B-36 ) 482 - 485 2016.10

Partial Discharge Properties of Resin Molded Insulation Substrate after Long Term Voltage Application Reviewed

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2016) ( 4B-29 ) 453 - 456 2016.10

Comparison of Sensor Detection Sensitivity in Repetitive Partial Discharge Inception Voltage Measurement for Twisted Pair Placed in Stator Reviewed

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2016) ( 3C-19 ) 239 - 242 2016.10

Partial Discharge Detection and Induced Surface Current Analysis Using Transient Earth Voltage Method for High Voltage Equipment Reviewed

The 2016 International Conference on Condition Monitoring and Diagnosis (CMD2016) ( P1-27 ) 455 - 459 2016.09

Degradation Diagnosis of Electrical Insulation Performance of 6.6 kV Class Epoxy Resin Insulator Contaminated with Iron Powder and Moisture Reviewed

The 2016 International Conference on Condition Monitoring and Diagnosis (CMD2016) ( P2-52 ) 803 - 806 2016.09

Partial Discharge Characteristics of Oil Impregnated Paper Insulation System with Oil Gap under Repetive Impulse Voltage Superimposed on AC Voltage Reviewed

The 2016 International Conference on Condition Monitoring and Diagnosis (CMD2016) ( P1-43 ) 522 - 525 2016.09

Development of Diagnostic Methods for Vacuum Leakage from Vacuum Interrupter by Partial Discharge Detection Reviewed

27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV2016) ( C1-P-21 ) 611 - 614 2016.09

Partial Discharge Characteristics Of Wedge-Shaped Gap Between Coated Electrodes In SF6 Under Lightning Impulse Voltage Reviewed

21st International Conference on Gas Discharges and Their Applications (GD2016) ( B6 ) 301 - 304 2016.09

Effects of Various Parameters on Movement of Inorganic Particles in Epoxy Liquid under Electric Field Reviewed

IEEJ Transactions on Fundamentals and Materials 136 ( 9 ) 586 - 591 2016.09

Basic study on partial discharge location in power module Reviewed

Mitsudome H., Akinaga Y., Matsuo K., Kozako M., Hikita M., Ikeda Y., Taniguchi K., Nakamura Y., Okamoto K.

Proceedings of the 2016 IEEE International Conference on Dielectrics, ICD 2016 1 451 - 454 2016.08

Language：English Publishing type：Research paper (international conference proceedings)

© 2016 IEEE. This paper deals with partial discharge (PD) location in a power module by measuring electromagnetic (EM) wave of PD using four loop sensors. As the distance between the sensor and PD source decreases, the peak to peak magnitude of the first wave of detected EM wave was found to increase using four sensors array. An attempt is made to locate PD source using output electromagnetic waves detected four loop sensors by the time of flight method. As a result, the present method is found to allow PD location with location identification error of 5 mm.

DOI： 10.1109/ICD.2016.7547640

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Effect of Permittivity Variation on Surface Flashover of GIS Epoxy Spacer Model in SF6 Gas Reviewed

International Conference on Dielectrics (ICD2016) ( 1-10 ) 96 - 99 2016.07

PD Properties and Gases Generated by Palm Fatty Acids Esters (PFAE) Oil Reviewed

International Conference on Dielectrics (ICD2016) ( 6-4 ) 816 - 819 2016.07

Simulation Analysis of Surface Current as TEV signal caused by Partial Discharge on Post Insulator in Bus Duct Reviewed

International Conference on Dielectrics (ICD2016) ( 5a-8 ) 480 - 484 2016.07

Impulse and Subsequent AC Partial Discharge Properties in Cast Resin Transformer Reviewed

International Conference on Dielectrics (ICD2016) ( 5a-2 ) 455 - 458 2016.07

Basic Study on Partial Discharge Location in Power Module Reviewed

International Conference on Dielectrics (ICD2016) ( 5a-1 ) 451 - 454 2016.07

Study on Streaming Electrification Properties of Palm Fatty Acid Ester (PFAE) Oil due to Aging Reviewed

International Conference on Dielectrics (ICD2016) ( 3b-4 ) 410 - 413 2016.07

Nano SiO2/epoxy Coating Effect on Creepage Discharge Characteristics in Oil/Pressboard Composite Insulation System Reviewed

International Conference on Dielectrics (ICD2016) ( 3a-5 ) 394 - 397 2016.07

Effect of Discharge Trace Formation on Creepage Discharge Characteristics in Oil/Pressboard Composite Insulation System under Impulse Voltage Application Reviewed

International Conference on Dielectrics (ICD2016) ( 4-11 ) 342 - 345 2016.07

Evaluation on Applicability to Electrical Insulating Material of Hydrocarbon-based Thermosetting Resin Reviewed

IEEJ Transactions on Fundamentals and Materials 136 ( 5 ) 324 - 329 2016.05

Simulation on the microvaristor chain formation in liquid epoxy under electric field Reviewed

D.Komesu, M.Mori, S.Ishibe, M.Kozako, M.Hikita

IEEE Transactions on Dielectrics and Electrical Insulation 23 ( 1 ) 216 - 221 2016.02

Characteristics of Discharge Inception across Barrier in the Oil/Pressboard Composite Insulation System Reviewed

vol.136 ( No.2 ) 105 - 106 2016.02

Study on PD Properties of Palm Fatty Acids Esters Oil Reviewed

A.Rajab, M.Tsuchie, M.Kozako, M.Hikita, T. Suzuki

International Symposium on EcoTopia Science 2015 2015.11

Impulse Creepage Discharge Properties of Solid Coated Pressboard/Oil Composite Insulation with rod-plane Electrode System Reviewed

K. H. Jang, T. Akahoshi, M. Kozako, M. Hikita

2015 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering ( O-003 ) 2015.11

Partial Discharge Inception Voltage and Breakdown Voltage of Micro Cellular Resin Reviewed

N.Yanaze, M.Kozako, M.Hikita, K.Tomizawa, M.Ohya

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2015) ( 4B-13 ) 370 - 373 2015.10

Repetitive Impulse Voltage Generator Development and Waveform Analysis for Testing Insulation Dignity of Inverter-fed Low Voltage Motor Reviewed

M.Hikita, K.Nakamura, M.Kozako, T.Ueno, S.Fukumoto, K.Nakayama, T.Sakurai, T.Ikegami, T.Yoshimitsu, T.Hirose, S.Hiroshima

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2015) ( 4B-14 ) 374 - 378 2015.10

Partial Discharge Characteristics of Epoxy Composite with Micro-meter Size Hollow Glass Particles Reviewed

T.Hori, N.Yanaze, M.Kozako, M.Hikita, J.Wada, S.Okabe

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2015) ( 4B-12 ) 366 - 369 2015.10

Effect of Thin Solid Layer Coating on Creepage Discharge Characteristics in Oil/Pressboard Composite Insulation System Reviewed

K.H.Jang, S.Yoshida, M.Kozako, M.Hikita

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2015) ( 8C-5 ) 832 - 835 2015.10

Partial Discharge Detection by TEV Sensors and Signal Propagation Analysis in Transformer Model Reviewed

A.Itose, Y.Tai, M.Kozako, M.Hikita

19th International Symposium on High Voltage Engineering (ISH) ( 567 ) 2015.08

Study on Static Electrification of Palm FattyAcid Ester (PFAE) Oil Reviewed

H.Gumilang, M.Tsuchie, M.Kozako, M.Hikita, A.Rajab, T.Suzuki, S.Hatada, A.Kanetani, H.Futakuchi, U.Khayam Suwarno

The 5th International Conference on Electrical Engineering and Informatics 2015 (ICEEI2015) ( 43 ) 234 - 237 2015.08

Design of Dipole Antenna Model for Partial Discharge Detection in GIS Reviewed

K.Khotimah, U.Khayam, Suwarno, Y.Tai, M.Kozako, M.Hikita

The 5th International Conference on Electrical Engineering and Informatics 2015 (ICEEI2015) ( 36 ) 196 - 201 2015.08

Electrical Insulation Properties Evaluation of Poly-tricyclopentadiene under High Temperature Reviewed

K.Yoshida, M.Kozako, S.Ishibe, M.Hikita, N.Kamei

11th International Conference on The Properties and Applications of Dielectric Materials (ICPADM2015) ( SC0-17 ) 2015.07

Comparison of Low Thermal Fault Gases of Various Fatty Acid Mono Esters Reviewed

A.Rajab, M.Tsuchie, M.Kozako, M.Hikita, S.Hatada, T.Suzuki, A.Kanetani

11th International Conference on The Properties and Applications of Dielectric Materials (ICPADM2015) ( MD1-2 ) 2015.07

Electric Field Grading of Gas Insulated Switchgears with Microvaristor Composites Reviewed

N.Matsuoka, D.Komes, M.Mori, M.Kozako, M.Hikita, S.Ishibe

11th International Conference on The Properties and Applications of Dielectric Materials (ICPADM2015) ( IE2-4 ) 2015.07

Partial Discharge Inception Voltage of Pressurized Gas Insulation Encapsulation Used for High-Temperature and High-Voltage Power Module Reviewed

H.Mitsudome, K.Koyanagi, A.Imakiire, M.Kozako, M.Hikita, Z.Valdez-Nava, S.Dinculescu, T.Lebey

The 11th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2015) ( 387 ) 118 - 121 2015.06

Characterization of Contactless Power Transfer System and Investigation of Core Shape for AGV Application of Enamel Coating Ribbon Wire Used for Low-Voltage Motors Reviewed

T.Kojima, H.Tanabe, A.Imakiire, K.Fuji, M.Kozako, M.Hikita, Y.Imoto, K.Honda

The 11th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2015) ( 284 ) 703 - 706 2015.06

Comparison Performance of Si-IGBT and SiC-MOSFET Used for High Efficiency Inverter of Contactless Power Transfer System Reviewed

H.Tanabe, T.Kojima, A.Imakiire, K.Fuji, M.Kozako, M.Hikita

The 11th IEEE International Conference on Power Electronics and Drive Systems (PEDS 2015) ( 419 ) 707 - 710 2015.06

Evaluation of Novel Impulse Voltage Generator for Qualification Test of IEC60034-18-42 Reviewed

T.Ueno, H.Nakaya, M.Kozako, M.Hikita, T.Tsuda, T.Kisakibaru, T.Yoshimitsu, T.Hirose, S.Hiroshima

2015 IEEE Electrical Insulation Conference (EIC2015) ( P2-18 ) 297 - 300 2015.06

Effect of X-ray Irradiation on Partial Discharge Inception and Extinction Characteristics in Cast Resin Reviewed

A.Inatomni, M.Kozako, M.Hikita, K.Iida, T.Umemura, Y.Nakamura, T.Maeda, M.Higashiyama

2015 IEEE Electrical Insulation Conference (EIC2015) ( 24.4 ) 575 - 578 2015.06

エナメル皮膜リボン線の部分放電開始電圧特性と発生箇所の同定 Reviewed

中屋裕貴, 小迫雅裕, 匹田政幸, 冨澤恵一, 大矢真, 武藤大介

電気学会論文誌A vol.135 ( No.2 ) 107 - 112 2015.02

オレフィン系熱硬化性ポリジシクロペンタジエンとエポキシ樹脂の誘電特性の比較 Reviewed

増崎裕季, 大木義路, 田付強, 小迫雅裕, 亀井伸人

電気学会論文誌A vol.135 ( No.2 ) 82 - 87 2015.02

エポキシ中のµバリスタ粒子チェーン制御法に関する検討 Reviewed

森匡史, 米須大吾, 小迫雅裕, 匹田政幸, 石辺信治

電気学会論文誌A vol.135 ( No.2 ) 115 - 116 2015.02

Comparative study of partial discharge characteristics and dissolved gas analysis on palm-based oil as insulating material Reviewed International journal

A.Susilo, J.Muslim, M.Hikita, M.Kozako, M.Tsuchie, Y.Arief, N.Muhamad, T.Suzuki, S.Hatada, A.Kanetani, T.Kano, Suwarno, U.Khayam

2nd IEEE Conference on Power Engineering and Renewable Energy 2014(ICPERE) ( 10B2-4 ) 232 - 236 2014.12

ナノフィラーが拓く新しい絶縁材料の世界

今井隆浩, 栗本宗明, 小迫雅裕, 水谷嘉伸, 田中祀捷

Polyfile ( 株式会社大成社 ) 51 ( 609 ) 50 - 55 2014.11

Partial Discharge Phenomena in Medium Vacuum Region of Vacuum Interrupter and Application to Fault Diagnosis Reviewed

T.Nakaoka, Y.Tai , M.Kozako, M.Hikita, M.Kamarol, K.Sato, N.Tetsu, H.Urai, K.Tsuchiya

The 9th International Workshop on High Voltage Engineering (IWHV) Vol.2 ( ED-14-118 SP-14-74 HV-14-130 ) 57 - 62 2014.11

Partial Discharge Inception Voltage Measurement and Location Identification of Enamel Coating Ribbon Wire Used for Low-Voltage Motors Reviewed

N.Yanaze, N.Nakaya, M.Hikita, M.Kozako, K.Tomizawa, M.Ohya

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2014) ( 3B-12 ) 192 - 195 2014.10

Simulation on the Formation of Microvaristor Chains in Liquid Epoxy Resin Under Electric Field Reviewed

D.Komesu, M.Mori, S.Ishibe, M.Kozako, M.Hikita

IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2014) ( 8A-7 ) 691 - 694 2014.10

Development of Partial Discharge Detection and Diagnostic Methods of Vacuum Circuit Breaker Reviewed

T.Nakaoka, K.Mohamad, M.Kozako, M.Hikita, K.Sato, N.Tetsu, H.Urai, K.Tsuchiya

26th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV2014) ( C1-P-154 ) 485 - 488 2014.09

Construction of Measurement System of PD Phenomena in Medium Vacuum Region of Vacuum Interrupter Reviewed

M.Kamarol, T.Nakaoka, M.Kozako, M.Hikita, K.Sato, N.Tetsu, H.Urai, K.Tsuchiya

26th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV2014) ( C1-P-176 ) 489 - 492 2014.09

Study on Detection Signal Identification of Prototype Online Partial Discharge Monitoring and Diagnosis System in High Voltage Electric Equipment Reviewed

Y.Tai, N.Yasukochi, M.Kozako, M.Hikita, A.Suizu, N.Yamamura

The 2014 International Conference on Condition Monitoring and Diagnosis (CMD2014) ( OF-04 ) 443 - 446 2014.09

Fundamental Characteristics of Repetitive Impulse Generator for Detecting Partial Discharge Reviewed

T.Ueno, H.Nakaya, M.Kozako,M.Hikita, T.Ikegami, T.Yoshimitsu, T.Hirose, S.Hiroshima

5th Euro Asian Pulsed Power Conference ( P1-23 ) 2014.09

Characteristics of Discharge Progress across Barrier in the Oil/Pressboard Composite Insulation System under Impulse Voltage Application Reviewed

S.Yoshida1, M.Kozako, M.Hikita, T.Umemoto, S.Kainaga, H.Muto, T.Tsurimoto

18th IEEE International Conference on Dielectric Liquids 2014 (ICDL2014) ( 156 ) 2014.06

Characteristics of Partial Discharge in the Oil Gap Separated by Pressboard Barrier in Oil/Pressboard Composite Insulation System Reviewed

T.Umemoto, S.Kainaga, H.Muto, T.Tsurimoto, S.Yoshida, M.Kozako, M.Hikita

18th IEEE International Conference on Dielectric Liquids 2014 (ICDL2014) ( 154 ) 2014.06

Study on Influence of Oxidation on Static Electrification in Transformer Oil Reviewed

K.Shima, M.Tsuchie, M.Kozako, M.Hikita, Y.Gosho

18th IEEE International Conference on Dielectric Liquids 2014 (ICDL2014) ( 159 ) 2014.06

Study on The Formation of Microvaristor Chains in Composite Varistors and Their Electrical Characteristics Reviewed

M.Mori, D.Komesu, S.Ishibe, M.Kozako, M.Hikita

2014 IEEE Electrical Insulation Conference (EIC2014) ( S15-4 ) 483 - 487 2014.06

Characteristics of Discharge Generation across Insulation Barrier in the Oil/Pressboard Composite Insulation Systems Reviewed

S.Yoshida, M.Kozako, M.Hikita, T.Umemoto, S.Kainaga, H.Muto, T.Tsurimoto

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( VA12 ) 225 - 228 2014.06

Effects of Nano-alumina Hydrate Coating for Conductive Fillers on Dielectric Properties of Epoxy Composite Materials Reviewed

M.Kozako, M.Hikita, M.Sato, G.Sato, Z.Valdez-Nava, S.Diaham, T.Lebey

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( C5 ) 77 - 80 2014.06

Evaluation of Partial Discharge Inception Voltage of Bonding-less Gas Insulation Packaging for High Temperature and High Voltage Power Module Reviewed

K.Koyanagi, A.Yamane, A.Imakiire, M.Kozako, M.Hikita, S.Dinculescu, Z.Valdez-Nava, T.Lebey

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( VB17 ) 425 - 428 2014.06

Dielectric Properties of Olefin-based Thermosetting Resin for Application to Electrical Insulating Material Reviewed

K.Yoshida, M.Kozako, S.Ishibe, M.Hikita, N.Kamei

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( VB5 ) 378 - 380 2014.06

Comparison of Dielectric Properties among Polydicyclopentadiene Resin, Epoxy Resin and Their Composites with Microsized SiO2 Fillers Reviewed

Yuki Masuzaki, Yoshimichi Ohki, and Masahiro Kozako

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( VB4 ) 374 - 377 2014.06

Orientation Effect of Nano-Alumina Coated Conductive Fillers on Dielectric Properties of Epoxy Composites Reviewed

K.Ushijima, M.Kozako, M.Hikita

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( PA10 ) 323 - 326 2014.06

Effects of Motorette Structure and Vanish Treatment on Repetitive Partial Discharge Inception Voltage Measurement Test in Inverter Surge Insulation Reviewed

H.Nakaya, N.Yanaze, M.Kozako, M.Hikita, T.Ueno, T.Yoshimitsu, K.Nakayama, T.Sakurai, T.Hirose, S.Hiroshima

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( VA23 ) 268 - 271 2014.06

Study of Direction Identification of Partial Discharge Using Multi Small Loop Sensors Reviewed

A.Inatomi, S.Makki, M.Kozako, M.Hikita, T.Umemura, K.Iida, Y.Nakamura, T.Hirose, T.Maeda, M.Higashiyama

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( VA17 ) 245 - 248 2014.06

UHF Sensor Optimization Used for Detecting Partial Discharge Emitted Electromagnetic Wave in Gas Insulated Switchgear Reviewed

I.Suprianto,U.Khayam, Suwarno, K.Nishigouchi, M.Kamaro, M.Kozako, M.Hikitao

2014 International Symposium on Electrical Insulating Materials (ISEIM2014) ( VA13 ) 229 - 232 2014.06

Modeling of Early Stage Partial Discharge and Overheating Degradation of Paper-oil Insulation154 kV GIS Using Electromagnetic Wave Propagation Simulation Reviewed

M.Tsuchie, M.Kozako, M.Hikita, E.Sasaki

IEEE Transactions on Dielectrics and Electrical Insulation 21 ( 3 ) 1342 - 1349 2014.06

Basic Investigation of Epoxy Resin Coatings with Dispersed Carbon Nanotubes Reviewed

97 ( 6 ) 24 - 32 2014.06

A New Concept Varistor With Epoxy/Microvaristor Composite Reviewed

S.Ishibe, M.Mori, M.Kozako, M.Hikita

IEEE Transactions on Power Delivery 29 ( 2 ) 677 - 682 2014.04

Evaluation of Detection Signal Characteristics on Prototype Online Partial Discharge Monitoring and Diagnosis System in High Voltage Electric Equipment Reviewed

Y.Tai, N.Yasukochi, M.Kozako, M.Hikita, A.Suizu, N.Yamamura

International Symposium on EcoTopia Science 2013 ( 1296 ) 2013.12

Barrier Effect on Creeping Discharge under Impulse Voltage Application in Oil/Pressboard Composite Insulation System Reviewed

S.Yoshida, M.Kozako, M.Hikita, T.Umemoto, S.Kainaga, H.Muto, T.Tsurimoto

International Symposium on EcoTopia Science 2013 ( 1298 ) 2013.12

Co-fired AlN-TiN assembly as a new substrate technology for high-temperature power electronics packaging Reviewed

Ceramics International 39 ( 8 ) 8743 - 8749 2013.12

Effect of the presence of epoxy spacer on transmission rate of electromagnetic wave propagating through T-branch of 66 kV GIS model tank Reviewed

U.Khayam, M.Kozako, M.Hikita, T.Hoshino, S.Maruyama, J.Wada, S.Okabe

IEEE Transactions on Dielectrics and Electrical Insulation 20 ( 6 ) 2254 - 2261 2013.12

Waveform Estimation of Particle Discharge Currents in Straight 154 kV GIS Using Electromagnetic Wave Propagation Simulation Reviewed

K.Nishigouchi, M.Kozako, M.Hikita, T.Hoshino, S.Maruyama, T.Nakajima

IEEE Transactions on Dielectrics and Electrical Insulation 20 ( 6 ) 2239 - 2245 2013.12

Partial Discharge Inception Voltage of Enamel Twisted-pair Samples with Several Laminated Insulation layers Reviewed

H.Nakaya, M.Kozako, M.Hikita, M.Ohya, D.Muto, K.Tomizawa

IEEE Conference on Electrical Insulation and Dielectric Phenomena ( 8B-29 ) 1270 - 1273 2013.10

Evaluation of Novel Impulse Voltage Generator for Detecting Partial Discharge Reviewed

T.Ueno, H.Nakaya, M.Kozako, M.Hikita, T.Ikegami, T.Sakurai, H.Ogawa, T.Kisakibaru, S.Yamada, T.Yoshimitsu, T.Hirose, S.Hiroshima

IEEE Conference on Electrical Insulation and Dielectric Phenomena ( 8B-15 ) 1213 - 1216 2013.10

Enhanced Bowtie UHF Antenna for Detecting Partial Discharge in Gas Insulated Substation Reviewed

J.Muslim, A.Susilo, K.Nishigouchi, M.Kozako, M.Hikita, Y.Z.Arief, U.Khayam, Suwarno

2013 48th International Universities' Power Engineering Conference (UPEC) ( 97 ) 2013.09

Investigation of partial discharge characteristics induced by X-ray irradiation in artificial cavity in epoxy resin Reviewed

Electrical Engineering in Japan 184 ( 4 ) 1 - 9 2013.09

Characteristics of Creepage Discharge under Impulse Voltage Application in Oil/Pressboard Composite Insulation System Reviewed

S.Yoshida, N.Morita, M.Kozako, M.Hikita, T.Umemoto, S.Kainaga, H.Muto, T.Tsurimoto

18th International Symposium on High Voltage Engineering (ISH) ( PC-15 ) 635 - 640 2013.08

Current Waveform Estimation of PD in Straight 154 kV GIS Using Electromagnetic Wave Propagation Simulation Reviewed

K.Nishigouchi, M.Kozako, M.Hikita, T.Hoshino, S.Maruyama, T.Nakajima

18th International Symposium on High Voltage Engineering (ISH) ( PD-30 ) 1031 - 1036 2013.08

Electrical Characteristics and Voltage Limiting Effect of Epoxy/ZnO-particle Composite Varistors Reviewed

M.Mori, S.Ishibe, M.Kozako, M.Hikita

18th International Symposium on High Voltage Engineering (ISH) ( OE1-05 ) 1166 - 1171 2013.08

Study on Static Electrification of Aged Oil and Restrain Mechanism of BTA through Acceleration Test Reviewed

K.Shima, M.Tsuchie, M.Kozako, M.Hikita, H.Fukuda

18th International Symposium on High Voltage Engineering (ISH) ( OE6-05 ) 1338 - 1342 2013.08

Effects of Addition of Nano-scale Silica Filler on Erosion, Tracking Resistance and Mechanical Properties of Silicone Rubber Reviewed

R.Inoue, T.Kondo, T.Nakamura, M.Kozako, M.Hikita

18th International Symposium on High Voltage Engineering (ISH) ( PE-16 ) 1511 - 1515 2013.08

Application of UHF Method for the Measurement of Partial Discharges in the Transformer Model Reviewed

S.Yoshida, K.Kono, M.Uchiyama, S.Yamada, N.Morita, M.Kozako, M.Hikita

18th International Symposium on High Voltage Engineering (ISH) ( OF4-06 ) 1856 - 1860 2013.08

Construction and Evaluation of Prototype Online PD Monitoring and Diagnosis System in High Voltage Electric Equipment Reviewed

Y.Tai, M.Kozako, M.Hikita, I.Nakamura, N.Yamamura, A.Suizu

18th International Symposium on High Voltage Engineering (ISH) ( PF-42 ) 2145 - 2149 2013.08

Partial Discharge Induced Electromagnetic Wave Propagation Analysis and Detection Using UHF Sensor in Transformer Reviewed

M.Hikita, N.Morita, M.Kozako, S.Yoshida, M.Uchiyama, S.Yamada

18th International Symposium on High Voltage Engineering (ISH) ( OF4-01 ) 1829 - 1832 2013.08

Experimental Investigation on Erosion Resistance and Hydrophobicity of Silicone Rubber Nanocomposite Reviewed

T.Nakamura, M.Kozako, M.Hikita, R.Inoue, T.Kondo

The 11th IEEE International Conference on Solid Dielectrics ( 19 ) 230 - 233 2013.06

Effect of X-ray irradiation on partial discharge inception and extinction voltage characteristics of cast resin transformer insulation system Reviewed

S.Makki, M.Kozako, M.Hikita, K.Iida, T.Umemura, S.Nakamura, Y.Nakamura, T.Hirose, T.Maeda, M.Higashiyama

The 11th IEEE International Conference on Solid Dielectrics ( 55 ) 79 - 82 2013.06

Charge Behavior of Epoxy/Silica Nanocomposites under AC High Fields Reviewed

Y.Watanabe, K.Tohyama, M.Kozako, S.Kawano, K.Ito, H.Miyake, Y.Tanaka, Y.Hirose, Y.Ohki

The 11th IEEE International Conference on Solid Dielectrics ( 220 ) 892 - 895 2013.06

Improvement of Bowtie UHF Antenna Model for Detecting PD in GIS Reviewed

J. Muslim A.Susilo, K.Nishigouchi, Yanuar Z. Ariefd, U.Khayam, Suwarno, M.Kozako, M.Hikita

The 4th International Conference on Electrical Engineering and Informatics 2013(ICEEI2013) ( 1 ) 227 - 234 2013.06

Automatic Repetitive PD Inception Voltage Measurement of Motorette Sample Simulating Inverter-fed Motor Insulation by Using a Repetitive Voltage Impulse Generator Reviewed

M.Hikita, T.Ueno, Y.Kudo, M.Kozako, H.Ogawa, T.Sakurai, K.Nakayama, T.Yoshimitsu, T.Hirose, S.Hiroshima

The 12thInternational Electrical Insulation Conference 24 - 28 2013.05

Fabrication and Evaluation of SiC Inverter Using SiC-MOSFET Reviewed

A.Yamane, K.Koyanagi, M.Kozako, K.Fuji, M.Hikita

The IEEE 10th International Conference on Power Electronics and Drive Systems 1029 - 1032 2013.04

Development of A New Package for Next Generation Power Semiconductor Devices: toward High Temperature and High Voltage Applications Reviewed

K.Koyanagi, A.Yamane, M.Kozako, I.Omura, M.Hikita, Z.Valdez-Nava, S.Dinculescu, T.Lebey

The IEEE 10th International Conference on Power Electronics and Drive Systems ( B2L-G01-9239 ) 512 - 516 2013.04

高熱伝導エポキシ複合材料の低フィラー化技術

小迫雅裕

Polyfile ( 株式会社大成社 ) 51 ( 588 ) 30 - 33 2013.02

モールド絶縁系における微小空気ギャップの絶縁特性（２）－MGM,MGI電極系の部分放電挙動－ Reviewed

東山雅一, 鈴木勇人, 広瀬達也, 前田照彦, 中村修平, 梅村時博, 小迫雅裕, 匹田政幸村時博, 中村勇介, 広瀬達也

電気学会論文誌B vol.133 ( No.2 ) 203 - 209 2013.02

Effects of nanofiller materials on the dielectric properties of epoxy nanocomposites Reviewed

J. Katayama, Y. Ohki, N. Fuse, M. Kozako, T. Tanaka

IEEE Transactions on Dielectrics and Electrical Insulation 20 ( 1 ) 157 - 165 2013.02

Packaging of SiC-SBD for High Temperature Operation Reviewed

Z. Valdez-Nava, M. Kozako, S. Dinculescu, I.Omura, M. Hikita, T. Lebey

The 14th International Conference on Electronics Materials And Packaging (EMAP2012) ( P082 ) 428 - 431 2012.12

Partial discharge characteristics in epoxy cast molding insulation system by X-ray irradiation Reviewed

S.Makki, M.Kozako, M.Hikita, S.Nakamura, K.Iida, T.Umemura, Y.Nakamura, T.Hirose, T.Maeda, M.Higashiyama

Joint Conference of IWHV 2012 & JK 2012 on ED & HVE 1 ( ED-12-108 SP-12-034 HV-12-037 ) 13 - 17 2012.11

Numerical Analysis of PD emitted Electromagnetic wave propagation in Oil-immersed Transformer Reviewed

N.Morita, M.Kozako, M.Hikita, S.Yoshida, M.Uchiyama, S.Yamada

Joint Conference of IWHV 2012 & JK 2012 on ED & HVE 1 ( ED-12-113 SP-12-039 HV-12-042 ) 39 - 43 2012.11

Effects of coating of epoxy/CNT composites on surface flashover characteristics Reviewed

H.Nakatsu, M.Kozako, M.Hikita, D.Hirata, Y.Sato, M.Takei, H.Toda, K.Yoshinaga

Joint Conference of IWHV 2012 & JK 2012 on ED & HVE 2 ( ED-12-131 SP-12-057 HV-12-060 ) 23 - 26 2012.11

Effects of Addition of Nano-scale Silica Filler on Erosion, Tracking Resistance and Hydrophobicity of Silicone Rubber Reviewed

T.Nakamura, M.Kozako, M.Hikita, R.Inoue, T.Kondo

Joint Conference of IWHV 2012 & JK 2012 on ED & HVE 2 ( ED-12-144 SP-12-070 HV-12-073 ) 85 - 89 2012.11

インバータサージ部分放電測定における繰り返しインパルス電圧発生装置の構築と特性評価 Reviewed

上野崇寿, 工藤祐紀, 小迫雅裕, 匹田政幸, 櫻井孝幸, 小川弘之, 山田慎一郎, 吉満哲夫, 廣瀬達也, 廣島聡

電気学会論文誌A 132 ( 11 ) 965 - 971 2012.11

Oil Gap Dependence of Partial Discharge Starting Point in the Oil / Pressboard Composite Insulation System Reviewed

T.Umemoto, S.kainaga, T.Tsurimoto, H.Muto, T.Ishikura, N.Sugitani, N.Morita, M.Kozoko, M.Hikita

The 15th International Conference on Electrical Machines and Systems (ICEMS2012) ( LS2E-3 ) 2012.10

Development of Repetitive Voltage Impulse Generator and Automatic Repetitive PD Inception Voltage Measurement System for Testing Inverter-fed Motor Insulation Reviewed

M.Hikita, T.Ueno, Y.Kudo, M.Kozako, H.Ogawa, T.Sakurai, K.Nakayama, T.Yoshimitsu, T.Hirose, S.Hiroshima

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2012) ( 32 ) 145 - 148 2012.10

Process Influence on the Moisture Absorption in a Polymer Nanocomposite Reviewed

F.Saysouk, S.Diaham, M.L.Locatelli, B.Schlegel, V.Salles, Z.Valdez-Nava, M.Kozako, T.Lebey, E.Flahaut

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2012) ( 129 ) 547 - 550 2012.10

Fundamental Investigation of Dielectric Phenomena in Epoxy Composites during Curing Process under a Uniform Electric Field Reviewed

M.Kozako, Z.Valdez-Nava, S.Diaham, S.Dinculescu, T.Lebey

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2012) ( 129 ) 547 - 550 2012.10

Effect of Electric Field Application during Curing Process on Thermal Conductivity of Epoxy Composite Materials with Low Content Inorganic Particles Reviewed

S.Kinoshita, M.Kozako, M.Hikita, T.Tanaka

2012 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2012) ( 42 ) 187 - 190 2012.10

Basic discussion for coating of epoxy resin with carbon nano-tube dispersion Reviewed

132 ( 9 ) 773 - 779 2012.10

Fabrication of Silicone Rubber Nanocomposites and Quantitative Evaluation of Dispersion State of Nanofillers Reviewed

M.Kozako, T.Tominaga, M.Hikita, G.Ueta, S.Okabe, T.Tanaka

19 ( 5 ) 1760 - 1767 2012.10

Characteristics of PD Induced Electromagnetic Wave Propagating through T-Branch of 154kV GIS in the Presence of Epoxy Spacer Reviewed

U.Khayam, T.Hoshino, T.Nakajima, S.Maruyama, K.Nishigouchi, M.Kozoko, M.Hikita

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-53 ) 379 - 382 2012.09

New Partial Discharge Location Method in Power Tranceformer based on Acoustic Wave Propagation Characteristics using Numerical Simulation Reviewed

M.Kozako, H.Murayama, M.Hikita, K.Kashine, I.Nakamura, H.Koide

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-235 ) 854 - 857 2012.09

Effect of Excitation Current Waveform on PD Induced Electromagnetic Wave Propagation and Attenuation in Straight 154kV GIS Model Reviewed

K.Nishigouchi, M.Kozako, M.Hikita, T.Hoshino, S.Maruyama, T.Nakajima, U.Khayam

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-281 ) 309 - 312 2012.09

Recent Progress in Diagnosis of Transformers using Non-Conventional Partial Discharge Measurements Reviewed

M.Hikita, M.Kozako

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( IL-1 ) 193 - 197 2012.09

Characteristics of External Loop Sensor Located Near Bushing on Partial Discharge Measurement Reviewed

Sriyono, Y.Kim, U.Khayam, Swarno, M.Hikita

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-193 ) 320 - 323 2012.09

Study of Partial Discharge Induced Electromagnetic Wave Propagation Property in Power Transformer Model Reviewed

N.Morita, M.Kozako, M.Hikita, S.Yoshida, M.Uchiyama, S.Yamada

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-136 ) 44 - 47 2012.09

Sensitivity Verification and Determination of the Best Location of External UHF Sensors for PD Measurement in GIS Reviewed

Sriyono, W.Anggoro, K.Nishigouchi, U.Khayam, Suwarno, M.Kozako, M.Hikita, K.Urano, M.Chen

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-190 ) 698 - 701 2012.09

Influence of Spacer Aperture Size on PD-Induced Electromagnetic Wave Measured with UHF External Sensor in 66kV GIS Model Reviewed

W.Anggoro, Sriyono, K.Nishigouchi, U.Khayam, Suwarno, M.Kozako, M.Hikita, K.Urano, M.Chen

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-191 ) 387 - 391 2012.09

PD Pattern of Various Defects Measured by UHF External Sensor on 66kV GIS Model Reviewed

W.Anggoro, Sriyono, K.Nishigouchi, U.Khayam, Suwarno, M.Kozako, M.Hikita, K.Urano, M.Chen

International Conference on Condition Monitoring and Diagnosis (CMD2012) ( A-192 ) 954 - 947 2012.09

アルミナ被覆膜で絶縁化した熱伝導フィラー

佐藤護郎、佐藤正淳、匹田政幸、小迫雅裕

日本プラスチックス工業連盟誌　プラスチックス ( 日本工業出版 ) 2012 ( 9 ) 40 - 43 2012.09

カーボンナノチューブ分散エポキシ樹脂コーティングの基礎的検討 Reviewed

小迫雅裕, 中津秀幸, 戸田弘明, 山田修平, 吉永耕二, 匹田政幸,　平田大裕, 宮本剛寿, 武井雅文

電気学会論文誌A 132 ( 9 ) 773 - 779 2012.09

海外駐在記事：仏国ポールサバティエ大学滞在記

小迫雅裕

電気学会論文誌Ｂ ( 電気学会 ) 132 ( 8 ) NL8_4 2012.08

TiN/AlN ceramic substrates for high temperature power electronics applications Reviewed

Z.Valdez-Nava, M.Ferrato, S.Guillmet-Fritsch, M.Kozako, T.Lebey

The Electroceramics 13 ( P.12 ) 2012.06

Partial Discharge Properties of Ester Oils Having Different Molecular Structures Reviewed

M.Hikita, J.Tokiyoshi, M.Tsuchie, M.Kozako, T.Suzuki, A.Kanetani, T.Kano

2012 IEEE International Symposium on Electrical Insulation (ISEI2012) ( 7 ) 26 - 29 2012.06

X線照射によるエポキシ樹脂中の人工ボイド内部分放電特性の検討 Reviewed

東山雅一，髙田　一, 林　昌幸, 小迫雅裕, 匹田政幸, 中村修平, 梅村時博, 中村勇介, 広瀬達也

電気学会論文誌A 132 ( 4 ) 284 - 290 2012.04

屋外絶縁用ナノベーマイトアルミナ充填シリコーンゴムの創製とその特性の基礎的検討 Reviewed

小迫雅裕, 東小路政史, 匹田政幸, 田中祀捷

電気学会論文誌A 132 ( 3 ) 257 - 262 2012.03

エポキシ樹脂中ボイド放電におけるX線照射効果の物理的考察 Reviewed

林　昌幸, 髙田　一, 小迫雅裕, 匹田政幸, 中村修平, 梅村時博, 中村勇介, 広瀬達也, 東山雅一

電気学会論文誌A 132 ( 2 ) 154 - 155 2012.02

Development of Epoxy/BN Composites with High Thermal Conductivity and Sufficient Dielectric Breakdown Strength, Part I -Sample preparation and Thermal conductivity Reviewed

Zengbin Wang, Tomonori Iizuka, Masahiro Kozako, Yoshimichi Ohki and Toshikatsu Tanaka

IEEE Transactions on Dielectrics and Electrical Insulation 18 ( 6 ) 1963 - 1972 2011.12

Development of Epoxy/BN Composites with High Thermal Conductivity and Sufficient Dielectric Breakdown Strength, Part II -Breakdown strength Reviewed

Zengbin Wang, Tomonori Iizuka, Masahiro Kozako, Yoshimichi Ohki and Toshikatsu Tanaka

IEEE Transactions on Dielectrics and Electrical Insulation 18 ( 6 ) 1973 - 1983 2011.12

High Thermal Conductivity Epoxy/BN Composites with Sufficient Dielectric Breakdown Strength Reviewed

T.Tanaka, Z.Wang, T.Iizuka, M.Kozako, Y.Ohki

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2012) ( 7A-11 ) 691 - 694 2011.10

Comparison of Effects of Nanofiller Materials on the Dielectric Properties of Epoxy Nanocomposites Reviewed

J.Katayama, N.Fuse, M.Kozako, T.Tanaka, Y.Ohki

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2012) ( 3B-5 ) 318 - 321 2011.10

Study on Time Lag of Void Discharge in Epoxy Resin by Considering Attenuation of X-ray Irradiation Dose Reviewed

M.Hayashi, H.Takada, M.Kozako, M.Hikita, S.Nakamura, T.Umemura, M.Higashiyama

2011 International Symposium on Electrical Insulating Materials (ISEIM2011) ( MVP2-20 ) 405 - 408 2011.09

Development of Partial Discharge Location System in Oil-Filled Transformer Considering Acoustic Wave Propagation Properties Reviewed

H.Murayama, T.Katayama, K.Yamada, M.Kozako, M.Hikita, K.Kashine, I.Nakamura, H.Koide

2011 International Symposium on Electrical Insulating Materials (ISEIM2011) ( MVP1-13 ) 273 - 276 2011.09

Quantitative Evaluation of Nano-silica Dispersion in Silicone Nanocomposites and Its Resistance to Erosion and Tracking Reviewed

T.Tominaga, M.Kozako, M.Hikita, R.Inoue, T.Kondo, G.Ueta, S.Okabe

2011 International Symposium on Electrical Insulating Materials (ISEIM2011) ( MVP1-20 ) 301 - 304 2011.09

Coating of Carbon Nano-tube Filled Epoxy Resin and Its Surface Conductivity Reviewed

H.Nakatsu, M.Kozako, H.Toda, H.Ebihara, K.Yoshinaga, M.Hikita, D.Hirata, T.Miyamoto, M.Takei

2011 International Symposium on Electrical Insulating Materials (ISEIM2011) ( MVP2-6 ) 349 - 352 2011.09

Development and Evaluation of Small Loop Sensor for Detecting Electromagnetic Field Caused by Partial Discharges in Simulated Insulation System of Inverter-fed Rotating Machine Reviewed

Y.Kudo, N.Yahara, M.Fujimoto, M.Kozako, M.Hikita

2011 International Symposium on Electrical Insulating Materials (ISEIM2011) ( MVP1-11 ) 265 - 268 2011.09

エポキシモールド絶縁システム中の人工ボイド内部分放電現象の検討 Reviewed

髙田　一, 林　昌幸, 小迫雅裕, 匹田政幸, 中村修平, 梅村時博, 中村勇介, 広瀬達也, 東山雅一

電気学会論文誌A 131 ( 9 ) 785 - 791 2011.09

Propagation Property of Partial Discharge Induced Electromagnetic Wave in Power Transformer and Comparison of UHF Sensor Characteristics Reviewed

N.Morita, M.Kozako, M.Hikita, M.Uchiyama, S.Yamada, Y.Tagniguchi

17th International Symposium on High Voltage Engineering (ISH) ( F-008 ) 4 pages 2011.08

Influence of the Existence of the Epoxy Spacer on the Propagation Property of Partial Discharge Induced Electromagnetic Wave in Straight 154kV Reviewed

U.Khayam, M.Hayashi, M.Kozako, M.Hikita, T.Hoshino, S.Maruyama, T.Sakakibara, J.Wada, S.Okabe

17th International Symposium on High Voltage Engineering (ISH) ( F-026 ) 2011.08

Preparation and Evaluation of Epoxy/Alumina Composite Materials toward High Thermal Conductivity Reviewed

S.Kinoshita, Y.Okazaki, M.Kozako, M.Hikita, T.Tanaka

The International Conference on Electrical Engineering 2011(ICEE2011) ( A491 ) 4 pages 2011.07

Development of Compact Evaluation Apparatus for Power Electronics Devices under High Temperature and High Voltage Environment Reviewed

H.Kawano, M.Kozako, I.Omura, M.Hikita, T.Lebey

The International Conference on Electrical Engineering 2011(ICEE2011) ( A510 ) 4 pages 2011.07

Measuring SiC-MOSFET Inverter Waveform and Efficiency Reviewed

S.Machino, M.Kozako, K,Harada, M.Hikita

The International Conference on Electrical Engineering 2011(ICEE2011) ( A511 ) 4 pages 2011.07

Toward High Thermal Conductivity Nano Micro Epoxy Composites with Sufficient Endurance Voltage Reviewed

T.Tanaka, M.Kozako, K.Okamoto

2011 International Conference on Electrical Engineering and Informatics (ICEEI2011) ( A032 ) 2011.07

モールド絶縁における微小空気ギャップの絶縁特性 Reviewed

東山雅一, 鈴木勇人, 広瀬達也, 中村勇介, 前田照彦, 中村修平, 梅村時博, 小迫雅裕, 匹田政幸

電気学会論文誌B Vol.131 ( No.7 ) 630 - 636 2011.07

X-ray Irradiation Induced Discharge of Spherical Void in Epoxy Resin Reviewed

M.Hikita, M.Kozako, H.Takada, M.Higashiyama, T.Hirose, Y.Nakamura, S.Nakamura, T.Umemura

2011 Electrical Insulation Conference (EIC2011) ( No.096 S12–ML5 ) 463 - 467 2011.06

Effect of Epoxy Spacer on Transmission Rate of Electromagnetic Wave Propagating through T-Branch of GIS Model Tank Reviewed

U.Khayam,H.Takada,M.Hayashi,S.Yoshida,T.Hoshino,T.Sakakibara,S.Maruyama,S.Okabe,J.Wada,M.Kozako,M.Hikita

7th International Workshop on High Voltage Engineering (IWHV2010) ( ED-10-87 SP-10-54 HV-10-49 ) 127 - 132 2010.11

Propagation Properties of Electromagnetic Waves Emitted by Partial Discharge in Oil for Model Transformer Tank with a Practical Coil Reviewed

M.Kozako,A.Morita,S.Ohtsuka,M.Hikita,S.Yamada,Y.Taniguchi

International Conference on Condition Monitoring and Diagnosis (CMD2010) ( A4-3 ) 123 - 126 2010.09

Dissolved Gas Analysis of Transformer Oil under the Conditions of Partial Discharge and Overheating Reviewed

Y.Abe,M.Kozako,H.Toda,M.Tsuchie,M.Hikita,E.Sasaki

International Conference on Condition Monitoring and Diagnosis (CMD2010) ( A4-5 ) 131 - 134 2010.09

Development of PD Location System of Power Cable Incorporating PD Charge Distribution Measurement by Utilizing GPS and Atomic Clocks Reviewed

T.Katayama,M.Kozako,M.Hikita,K.Abe,H.Suzuki

International Conference on Condition Monitoring and Diagnosis (CMD2010) ( B1-2 ) 255 - 258 2010.09

Partial-discharge Recognition in Three-Phase GIS using Neural Network Reviewed

D.Hamdani,U.Khayam,Suwarno,M.Kozako,M.Hikita,N.Otaka,Y.Takehara

International Conference on Condition Monitoring and Diagnosis (CMD2010) ( C1-1 ) 455 - 458 2010.09

Influence of Different Diameter Bus Conductor Part of GIS on Propagation Property of PD-Induced Electromagnetic Wave Invited Reviewed

M.Hikita, Y.Yamamura, M.Kozako, M.Hayashi, S.Ohtsuka, T.Hoshino, S.Maruyama, T.Sakakibara

International Conference on Condition Monitoring and Diagnosis (CMD2010) ( C2-1 ) 477 - 480 2010.09

Switching Characteristics of SiC-VJFET and Manufacture of Inverter Reviewed

K.Harada,K.Maki,S.Pounyakhet,J.Tokiyoshi,M.Kozako,S.Ohtsuka,M.Hikita

The 2010 International Power Electronics Conference ECCE ASIA- (IPEC-Sapporo 2010) ( 22P2-23 ) 176 - 179 2010.07

High Temperature High Voltage Packaging of Wideband Gap Semiconductors Reviewed

T.Lebey,I.Omura,M.Kozako,H.Kawano,M.Hikita

The 2010 International Power Electronics Conference ECCE ASIA- (IPEC-Sapporo 2010) ( 22P2-24 ) 180 - 186 2010.07

Effects of Addition of Nano-scale Alumina and Silica Fillers on Thermal Conductivity and Dielectric Strength of Epoxy / Alumina Microcomposites Reviewed

Y.Okazaki,M.Kozako,M.Hikita,T.Tanaka

2010 IEEE International Conference on Solid Dielectrics (ICSD2010) ( B2-28 ) 279 - 282 2010.07

Preparation and Evaluation of Epoxy Composite Insulating Materials toward High Thermal Conductivity Reviewed

M.Kozako,Y.Okazaki,M.Hikita,T.Tanaka

2010 IEEE International Conference on Solid Dielectrics (ICSD2010) ( F2-22 ) 2010.07

Breakdown Voltage of Interelectrode Gap between Sphere-plane Electrodes under AC Voltage Reviewed

M.Higashiyama,T.Hirose,T.hayama,S.Nakamura,T.Umemura,M.Hikita,M.Kozako

2010 IEEE International Symposium on Electrical Insulation (ISEI2010) ( 44 ) 2010.06

Partial Discharge Phenomena in Artificial Cavity in Epoxy Cast Resin Insulation System Reviewed

M.Hikita,M.Kozako,H.Takada,M.Higashiyama,T.Hirose,S.Nakamura,T.Umemura

2010 IEEE International Symposium on Electrical Insulation (ISEI2010) ( 138 ) 2010.06

Research for Switching Phenomena in University Reviewed

K.Harada, H.Toda, M.kozako, S.Ohtsuka, M.Hikita, H.Ikeda

IEEJ-EIT Joint symposium advanced Technology inpower Systems ( SA-09-113 SP-09-095 FTE-09-050 PE-09-211 HV-09-104 PSE-09-219 ) 2009.11

Low Temperature Operation of Self-recovering Micro Fuse in Liquid Nitrogen and its ON Resistance Properties Reviewed

S.Mitarai,N.Sugitani,M.Kozako,M.Hikita,S.Ohtsuka

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 346 - 349 2009.11

Identification of Propagation Path of Acoustic Wave Signals in Simulated Transformer using Wavelet Analysis Reviewed

K.Yamada,A.Morita,M.Kozako,S.Ohtsuka,M.Hikita,K.Kashine,I.Nakamura,H.Koide

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 79 - 82 2009.11

Corona Inception Electric Field of Arcing Horn Model by Electric Field Calculation Based On 2D and 3D Models Reviewed

H.Shirai,N.Touamoua,M.kozako,M.Hikita,M.Uehara,Y.Tsuji,S.Ohtsuka

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 126 - 199 2009.11

Development of Partial Discharge Location System of Power Cable Using GPS and Atomic Clock Reviewed

T.Katayama,M.Kozako,S.Ohtsuka,M.Hikita,K.Abe,H.Suzuki

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 268 - 271 2009.11

Gas Pressure Dependence of Negative Lightning Impulse PD Properties in SF6 Gas Observed by Time and Spatial-resolved Spectroscopic Measurement System Reviewed

Y.Suzuki,T.Hara,M.Fukuhara,A.Sogabe,M.Kozako,M.Hikita,S.Ohtsuka

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 276 - 279 2009.11

Propagation Properties of PD-induced Electromagnetic Wave in Model 66kV GIS with T-Branch Structure Reviewed

Y.Yamamura,T.Nakano,S.Ohtsuka,M.Kozako,M.Hikita,T.Hoshino,S.Maruyama,T.Sakakigara,G.Ueta,S.Okabe

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 292 - 295 2009.11

Electromagnetic Wave Propagation Characteristics Emitted from Partial Discharge by Needle-Plane Electrode in Transformer Tank Model with Practical Coil Reviewed

A.Morita,K.Yamada,Y.Abe,M.Kozako,S.Ohtsuka,M.Hikita,S.Yamada,Y.Taniguchi

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 296 - 299 2009.11

Comparsopn of Partial Dischrge Quantity Between Tio2Filler Filled and SiO2 Filler Filled Enameled Wired Under High-frequency AC Voltage Simulating Inverter Surge Voltage Reviewed

K.Yamaguchi,M.Fujimoto,M.Kozako,S.Ohtsuka,M.Hikita,M.Ohya,K.Tomizawa,N.Fushimi

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 300 - 303 2009.11

Preparation and Fundamental Investigation of Characteristics of Silicon Rubber Nanocomposite for Outdoor Insulation Reviewed

M.Higashikoji,M.Kozako,S.Ohtsuka,M.Hikita,T.Tanaka

2009 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 342 - 345 2009.11

Partial Discharge Endurance Test on Several Kinds of Nano-Filled Enameled Wires Under High-Frequency AC Voltage Simulating Inverter Surge Voltage Reviewed

M.Hikita,K.Yamaguchi,M.Fujimoto,M.Kozako,S.Ohtsuka,M.Ohya,K.Tomizawa,N.Fushimi

2009 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (CEIDP2009) ( 304 ) 2009.10

Electromagnetic Wave Propagation Characteristics Emitted from Air PD Caused by Simulated PD Source in Transformer Tank Model with Practical Coil Reviewed

M.Hikita,A.Morita,M.Kozako,S.Ohtsuka,S.Yamada,Y.Taniguchi

16th International Symposium on High Voltage Engineering (ISH) ( C-7 ) 2009.08

Influence of a Disconnecting Part on Propagation Properties of PD-Induced Electromagnetic Wave in Model GIS Reviewed

S.Ohtsuka,H.Ikeda,M.Hikita,T.Nakano,K.Omori,M.Sawada,Y.Yamamura,M.Kozako,T.Hoshino,S.Maruyama,T.Sakakibara,G.Ueta,S.Okabe

16th International Symposium on High Voltage Engineering (ISH) ( D-52 ) 2009.08

Influence of External Noises on Insulation Diagnosis of GIS When UHF PD Detection Method is Used Reviewed

M.Hikita,T.Nakano,K.Omori,M.Sawada,S.Ohtsuka,M.Kozako,H.Ikeda,H.Koyama,T.Hoshino,S.Maruyama,Y.Taniguchi,T.Sakakibara

16th International Symposium on High Voltage Engineering (ISH) ( A-40 ) 2009.08

Influence of T-Branch Structure of Model GIS on Propagation Properties of PD-Induced Electromagnetic Wave Reviewed

T.Nakano,K.Omori,M.Sawada,Y.Yamamura,S.Ohtsuka,M.Kozako,H.Ikeda,M.Hikita,T.Hoshino,S.Maruyama,T.Sakakibara,G.Ueta,S.Okabe

16th International Symposium on High Voltage Engineering (ISH) ( D-49 ) 2009.08

Fundamental study on Partial Discharge Induced Acoustic Wave Propagation in Simulated Transformer Composite Insulation System Reviewed

M.Kozako,K.Yamada,A.Morita,S.Ohtsuka,M.Hikita,K.Kashine,I.Nakamura,H.Koide

The 9th International Conference on Properties and Applications of Dielectric Materials(ICPADM2009) ( E-19 ) 477 - 480 2009.07

University Approach for Circuit Breaker Development Reviewed

H.Ikeda,K.Harada,S.Ohtsuka,M.Kozako,M.Hikita

20th International Conference on Electricity Distribution(CIRED2009) ( 0794 ) 2008.06

Possible mechanisms of superior resistance of polyamide nanocomposites to partial discharges and plasmas Reviewed

N.Fuse, Y. Ohki, M. Kozako, T. Tanaka

IEEE Transactions on Dielectrics and Electrical Insulation 15 ( 1 ) 161 - 169 2008.01

いくつかの生分解性高分子の部分放電劣化 Reviewed

布施則一、藤田慎二郎、平井直志、田中祀捷、小迫雅裕、向當政典、岡部成光、大木義路

電気学会論文誌A 127 ( 2 ) 389 - 396 2007.08

ラム波解析に基づいたGIS 内自由金属異物の位置標定システムの構築 Reviewed

小迫雅裕,大塚信也,金子周平,岡部成光,匹田政幸

電気学会論文誌Ｂ 127 ( 2 ) 389 - 396 2007.02

Preparation and Various Characteristics of Epoxy/ Alumina Nanocomposites Reviewed

M.Kozako,Y.Ohki,M.Kohtoh,S.Okabe,T.Tanaka

IEEJ Trans. A 126 ( 11 ) 1121 - 1127 2006.11

Treeing Phenomena in Epoxy/Alumina Nanocomposite and Interpretation by a Multi-core Model Reviewed

T.Tanaka, A.Matsunawa, Y.Ohki, M.Kozako, M.Kohtoh and S.Okabe

IEEJ Trans. A 126 ( 11 ) 1128 - 1135 2006.11

Approach by Nano- and Micro-filler Mixture toward Epoxy Based Nanocomposites as Industrial Insulating Materials Reviewed

T.Imai, F.Sawa, T.Ozaki, T.Shimizu, S.Kuge, M.Kozako and T.Tanaka

IEEJ Trans. A 126 ( 11 ) 1136 - 1143 2006.11

Influence of Temperature on Mechanical and Insulation Properties of Epoxy-Layered Silicates Nanocomposite Reviewed

T.Imai, F.Sawa, T.Ozaki, T.Shimizu, R.Kido, M.Kozako and T.Tanaka

IEEE Transactions on Dielectrics and Electrical Insulation 13 ( 2 ) 445 - 452 2006.02

Effects of Epoxy/Filler Interface on Properties of Nano- or Micro-composites Reviewed

T.Imai, F.Sawa, T.Ozaki, T.Shimizu, S.Kuge, M.Kozako and T.Tanaka

IEEJ Trans. A 126 ( 2 ) 84 - 91 2006.02

Effects of Nano- and Micro-Filler Mixture on Electrical Insulation Properties of Epoxy Based Composites Reviewed

T.Imai, F.Sawa, T.Nakano, T.Ozaki, T.Shimizu, M.Kozako and T.Tanaka

IEEE Transactions on Dielectrics and Electrical Insulation 13 ( 2 ) 319 - 326 2006.02

Proposal of a Multi-core Model for Polymer Nanocomposite Dielectrics Reviewed

T.Tanaka, M.Kozako, N.Fuse and Y.Ohki

12 ( 4 ) 669 - 681 2005.04

画期的な絶縁特性の向上が期待される高分子ナノコンポジット

小迫雅裕、田中祀捷

放電学会誌 ( 放電学会 ) 47 ( 4 ) 1 - 4 2004.11

Surface Degradation of Polyamide Nanocomposites Caused by Partial Discharges Using IEC (b) Electrodes Reviewed

M.Kozako, N.Fuse, Y.Ohki, T.Okamoto and T.Tanaka

11 ( 5 ) 833 - 839 2004.05

超音波伝搬特性を考慮したGIS内自由金属異物の挙動およびサイズ評価 Reviewed

尾野本道雄、國武義高、大塚信也、小迫雅裕、湯浅禎之、岡部成光、匹田政幸

電気学会論文誌Ｂ 123 ( 11 ) 1387 - 1393 2003.11

Motion Analysis and Size Estimation of a Free Moving Metallic Particle in GIS based on Propagation Properties of Acoustic Wave Reviewed

M.Hikita,M.Onomoto,Y.Kunitake,M.Kozako,S.Yuasa,S.Okabe,S.Ohtsuka

13th International Symposium on High Voltage Engineering (ISH) 2003.08

UHF法で測定された電磁波第一波の振幅比に基づくGIS絶縁異常の診断 Reviewed

大塚信也、竹中賢司、小迫雅裕、趙孟佑、松久高士、匹田政幸

電気学会論文誌Ｂ 122 ( 6 ) 769 - 775 2002.06

GIS内の部分放電およびフリー異物により発生するラム波の時間周波数解析 Reviewed

小迫雅裕、大塚信也、松久高士、匹田政幸

電気学会論文誌B 122 ( 6 ) 719 - 724 2002.06

Time-Frequency Analysis of Lamb Waves using Wavelet Transform for Location Identification of Defects in GIS Reviewed

M.Kozako, S.Ohtsuka, K.Sawai, M.Hikita

2001 International Symposium on High Voltage Engineering (ISH) 6 ( 52 ) 991 - 994 2001.08

GIS中の超音波伝搬特性とそれに基づく新しい部分放電発生位置標定 Reviewed

小迫雅裕，大塚信也，澤井浩司，匹田政幸

電気学会論文誌B 121 ( 5 ) 677 - 682 2001.05

Risk Assessment of GIS based on Amplitude Ratio of PD-induced Electromagnetic Wave Measured by UHF Method Reviewed

K.Takenaka,M.Kozako,S.Ohtsuka,M.Cho,K.Sawai,M.Hikita

International Workshop on High Voltage Engineering (IWHV2000) 1 ( ED-00-139 ) 111 - 116 2000.11

Identification of Partial Discharge Location based on Propagation Properties of Acoustic Waves in GIS Reviewed

M.Kozako,S.Ohtsuka,K.Sawai,M.Hikita

International Workshop on High Voltage Engineering (IWHV2000) 1 ( ED-00-137 ) 99 - 104 2000.11

ディジタルフィルタを用いた部分放電放射電磁波からの連続周期的ノイズの除去 Reviewed

小迫雅裕，田志海，大塚信也，柴田信之，匹田政幸

電気学会論文誌B 120 ( 7 ) 975 - 981 2000.07

Identification of Partial Discharge Location in Consideration of Propagation Properties of Acoustic Waves in GIS Reviewed

M.Kozako,G.F.Xiang,S.Ohtsuka,H.Suzuki,M.Hikita

2000 International High Voltage Workshop 2000.04

Reduction of Continuous and Pulse-shape Noise by Digital Signal Proceeding for Reliable PD Detection in HV Substations Reviewed

M.Kozako, Z.H.Tian, N.Shibata, M.Hikita

11th International Symposium on High Voltage Engineering (ISH) 5 168 - 171 1999.08

Partial Discharge Measurements and Assessment of SF6 GIS by Acoustic and Electrical Techniques Reviewed

Z.H.Tian, M.Kozako, G.F.Xiang, N.Shibata, M.Hikita

1998 Korea-Japan Joint Symposium on Electrical Discharge and High Voltage Engineering 49 - 52 1998.10

Noise Reduction and PD Measurements using Digital Filter and Signal Processing Technique in HV Substations Reviewed

M.Kozako, Z.H.Tian, H.Okubo, N.Shibata, M.Hikita

1998 International Symposium on Electrical Insulating Materials (ISEIM) ( E2-2 ) 561 - 564 1998.09

Application of Digital Signal Processing to Noise Reduction of Partial Discharge Detection in SF6 Gas Reviewed

M.Kozako, H.Okubo, N.Shibata, M.Hikita

1997 Japan-Korea Joint Symposium on Electrical Discharge and High Voltage Engineering 63 - 66 1997.10

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Papers - KOZAKO Masahiro