奥田貴史 (Takafumi Okuda) - マイポータル

基本情報

所属: 大阪大学大学院工学研究科特任准教授

J-GLOBAL ID: 201601001240270382
researchmap会員ID: 7000018352

研究分野

ものづくり技術（機械・電気電子・化学工学） / 電子デバイス、電子機器 /

論文

Repetitive Partial Discharge Phenomena on Electrical Motor Coil Windings Under High-Repetition Nanosecond Pulsed Voltages Driven by SiC MOSFET Inverter

Yusuke Kikuchi, Jun Matsusue, Fuma Yamada, Takafumi Okuda, Takashi Nakamura

IEEE ACCESS 11 68826-68835 2023年
Digital active gate drive of SiC MOSFETs for controlling switching behavior—Preparation toward universal digitization of power switching

Hajime Takayama, Takafumi Okuda, Takashi Hikihara

International Journal of Circuit Theory and Applications 50(1) 183-196 2022年1月査読有り
A 5-kV pulse generator with a 100-kV/ μ s slew rate based on series-connected 1700-V SiC MOSFETs for electrical insulation tests

T. Okuda, Y. Nishimura, K. Nishioka, S. Kishimoto, Y. Kikuchi, T. Nakamura

Review of Scientific Instruments 92(11) 2021年11月1日査読有り
Depth profiles of electron traps generated during reactive ion etching in n-type 4H-SiC characterized by using isothermal capacitance transient spectroscopy

Kazutaka Kanegae, Takafumi Okuda, Masahiro Horita, Jun Suda, Tsunenobu Kimoto

Journal of Applied Physics 130(10) 2021年9月14日査読有り
Prediction of restriction in output current by reactant flow in redox flow battery for compensating load variations

Toko Mannari, Takafumi Okuda, Takashi Hikihara

International Journal of Circuit Theory and Applications 49(4) 1121-1132 2021年4月査読有り
Power Packet Dispatching With Shared Power Line: Experimental Verification for Industrial Applications

Shiu Mochiyama, Takafumi Okuda, Takashi Hikihara

IEEE Journal of Emerging and Selected Topics in Industrial Electronics 2(2) 164-172 2021年4月査読有り
The Broken Symmetry of Output Currents in a Matrix Converter and Its Recovery Control

Manuel Sánchez, Takafumi Okuda, Takashi Hikihara

Journal of Circuits, Systems and Computers 30(04) 2150072-2150072 2021年3月30日査読有り
A Study on Suppressing Surge Voltage of SiC MOSFET Using Digital Active Gate Driver

Hajime Takayama, Takafumi Okuda, Takashi Hikihara

2020 IEEE Workshop on Wide Bandgap Power Devices and Applications in Asia, WiPDA Asia 2020 2020年9月23日査読有り
Design and formation of SiC (0001)/SiO<inf>2</inf>interfaces via Si deposition followed by low-temperature oxidation and high-temperature nitridation

Takuma Kobayashi, Takafumi Okuda, Keita Tachiki, Koji Ito, Yu Ichiro Matsushita, Tsunenobu Kimoto

Applied Physics Express 13(9) 2020年9月1日査読有り
Electron-spin-resonance and electrically detected-magnetic-resonance characterization on PbC center in various 4H-SiC(0001)/SiO2 interfaces

T. Umeda, Y. Nakano, E. Higa, T. Okuda, T. Kimoto, T. Hosoi, H. Watanabe, M. Sometani, S. Harada

Journal of Applied Physics 127(14) 145301-145301 2020年4月14日査読有り
Measurement of internal magnetic flux density distribution in air-core toroidal transformer under high-frequency excitation

Kazuki Hashimoto, Takafumi Okuda, Takashi Hikihara

Review of Scientific Instruments 91(4) 2020年4月査読有り
Investigation of effect of stray capacitances in air-core toroidal transformer at high-frequency oscillation based on internal magnetic flux density

Kazuki Hashimoto, Takafumi Okuda, Takashi Hikihara

Proceedings - IEEE International Symposium on Circuits and Systems 2020-October 2020年査読有り
Model for charging/discharging dynamics of cells in redox flow battery with transport delay

Toko Mannari, Takafumi Okuda, Takashi Hikihara

PHYSICA SCRIPTA 94(9) 095005 2019年9月査読有り
Stabilization of mode in imbalanced operation of matrix converter by time-delayed feedback control

Manuel Sanchez, Takafumi Okuda, Takashi Hikihara

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS 46(12) 2420-2433 2018年12月査読有り
Microscopic mechanism of carbon annihilation upon SiC oxidation due to phosphorus treatment: Density functional calculations combined with ion mass spectrometry

Takuma Kobayashi, Yu-ichiro Matsushita, Takafumi Okuda, Tsunenobu Kimoto, Atsushi Oshiyama

APPLIED PHYSICS EXPRESS 11(12) 121301 2018年12月査読有り
A Flyback Converter with SiC Power MOSFET Operating at 10 MHz: Reducing Leakage Inductance for Improvement of Switching Behaviors

Kazuki Hashimoto, Takafumi Okuda, Takashi Hikihara

2018 International Power Electronics Conference, IPEC-Niigata - ECCE Asia 2018 3757-3761 2018年10月22日査読有り
Interface carbon defects at 4H-SiC(0001)/SiO2 interfaces studied by electron-spin-resonance spectroscopy

T. Umeda, G-W Kim, T. Okuda, M. Sometani, T. Kimoto, S. Harada

APPLIED PHYSICS LETTERS 113(6) 061605 2018年8月査読有り
Analysis of dynamic characteristics of SiC Schottky barrier diodes at high switching frequency based on junction capacitance

Ryosuke Maeda, Takafumi Okuda, Takashi Hikihara

Japanese Journal of Applied Physics 57(4) 04FF01 2018年4月1日
A comparative study on electrical characteristics of 1-kV pnp and npn SiC bipolar junction transistors

Takafumi Okuda, Tsunenobu Kimoto, Jun Suda

Japanese Journal of Applied Physics 57(4) 2018年4月1日査読有り
大電力高速パルス生成器によるオシロスコープのスキュー補正

奥田貴史, 引原隆士

電気学会論文誌. C 138(1) 37-40 2018年査読有り

もっとみる

MISC

Carrier lifetime and breakdown phenomena in SiC power device material

T. Kimoto, H. Niwa, T. Okuda, E. Saito, Y. Zhao, S. Asada, J. Suda

Journal of Physics D: Applied Physics 51(36) 2018年7月30日
表面ポテンシャルモデルを用いたSiCパワーMOSFETの過渡解析および昇圧回路への応用

奥田貴史, 中村洋平, 新谷道広, 佐藤高史, 引原隆士

電気学会産業応用部門大会(JIASC) LA-1(1-10) XXX-XXX 2016年8月
様々なバンド不連続を有するＡｌ_ｘＧａ_１－ｘＮ／ＳｉＣヘテロ接合バイポーラトランジスタの電流輸送機構

奥田貴史, 三宅裕樹, 木本恒暢, 木本恒暢, 須田淳

電子情報通信学会技術研究報告 111(292(LQE2011 96-122)) 39-42 2011年11月10日

講演・口頭発表等

Investigations on Electrical Characteristics of 1-kV pnp SiC BJTs Compared with npn SiC BJT

Takafumi Okuda, Tsunenobu Kimoto, Jun Suda

2017 International Conference on Solid State Devices and Materials 2017年9月22日
Impact of Annealing Temperature on Surface Passivation of SiC Epitaxial Layers with Deposited SiO2 Followed by POCl3 Annealing

Takafumi Okuda, Takuma Kobayashi, Tsunenobu Kimoto, Jun Suda

4th IEEE Workshop on Wide Bandgap Power Devices and Applications 2016年11月9日
Analysis of Transient Behavior of SiC Power MOSFETs Based on Surface Potential Model and Its Application to Boost Converter

Takafumi Okuda, Yohei Nakamura, Michihiro Shintani, Takashi Sato, Takashi Hikihara

4th IEEE Workshop on Wide Bandgap Power Devices and Applications 2016年11月8日
Surface Passivation on p-Type 4H-SiC Epitaxial Layers by Deposited SiO2 with POCl3 Annealing

Takafumi Okuda, Takuma Kobayashi, Tsunenobu Kimoto, Jun Suda

International Conference on Silicon Carbide and Related Materials 2015年10月7日
Oxidation-Induced Majority and Minority Carrier Traps in n- and p-Type 4H-SiC

Takafumi Okuda, Tsunenobu Kimoto, Jun Suda

International Conference on Silicon Carbide and Related Materials 2015年10月6日
Enhancement of Carrier Lifetimes in p-Type 4H-SiC Epitaxial Layers

Takafumi Okuda, Tsunenobu Kimoto, Jun Suda

International Conference on Silicon Carbide and Related Materials 2015年10月6日
Improvement of Carrier Lifetimes in Lightly-Doped p-Type 4H-SiC Epitaxial Layers by Combination of Thermal Oxidation and Hydrogen Passivation

Takafumi Okuda, Tetsuya Miyazawa, Hidekazu Tsuchida, Tsunenobu Kimoto, Jun Suda

European Conference on Silicon Carbide and Related Materials 2015年9月23日招待有り
Carrier Lifetime Improvement in Al-Doped p-Type 4H-SiC Epitaxial Layers by Hydrogen Passivation

Takafumi Okuda, Tsunenobu Kimoto, Jun Suda

International Conference on Silicon Carbide and Related Materials 2013年9月30日
Electrical Characteristics of 21-kV SiC BJTs with Space-Modulated Junction Termination Extension

Takafumi Okuda, Hiroki Miyake, Tsunenobu Kimoto, Jun Suda

International Conference on Solid State Devices and Materials 2013年9月25日
Persistent Photoconductivity in p-Type 4H-SiC Bulk Crystals

Takafumi Okuda, Hiroki Miyake, Tsunenobu Kimoto, Jun Suda

European Conference on Silicon Carbide and Related Materials 2012年9月2日
Current Transport Characteristics of Quasi-AlxGa1-xN/SiC Heterojunction Bipolar Transistors with Various Band Discontinuities

Takafumi Okuda, Hiroki Miyake, Tsunenobu Kimoto, Jun Suda

International Conference on Solid State Devices and Materials 2011年9月29日

共同研究・競争的資金等の研究課題

炭化珪素デバイスの高速スイッチング特性に注目したMHz級高周波電力変換器

日本学術振興会科学研究費助成事業若手研究 2018年4月 - 2020年3月

奥田貴史
炭化珪素バイポーラトランジスタのデバイス特性モデル化と高周波電力変換回路の製作

日本学術振興会科学研究費助成事業研究活動スタート支援 2016年8月 - 2018年3月

奥田貴史