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OBARA Hidemine
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【Published Thesis】 Flying-Capacitor Linear Amplifier With Capacitor Voltage Balancing for High-Efficiency and Low Distortion 2021.01
【Published Thesis】 Application of Multi-Level Converter for Fast Current Control in Small-Scale DC Power Network 2019.05
【Published Thesis】 Active Gate Control in Half-Bridge Inverters Using Programmable Gate Driver ICs to Improve both Surge Voltage and Converter Efficiency 2018.09
【Published Thesis】 A Partial Active Gate Control for Improvement of a Trade-off Relation Between Surge Voltage and Efficiency in a Three-Phase Inverter(IEEE Transactions on Industry Applications) 2024.01
【Published Thesis】 Multilevel Cascaded H-Bridge Linear Amplifier with Unequal DC Capacitor Voltages Using a DC Voltage Source 2022.01
【Published Thesis】 Systematization of a Multilevel-Topology-Based Linear Amplifier Family for Noiseless DC-AC Power Conversion 2021.11
【Published Thesis】 Flying-Capacitor Linear Amplifier With Capacitor Voltage Balancing for High-Efficiency and Low Distortion 2021.01
【Published Thesis】 Application of Multi-Level Converter for Fast Current Control in Small-Scale DC Power Network 2019.05
Chiba University Doctor Course Completed
Docter(Engineering) - Chiba University
Master(Engineering) - Chiba University
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Associate Professor
Concurrently Yokohama National UniversityInstitute of Advanced Sciences Associate Professor
Concurrently Yokohama National UniversityFaculty of Engineering
Concurrently Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Assistant Professor
Chuo University
Kyushu University Research Institute for Applied Mechanics
JSPS Special researcher of the Japan Society for the Promotion of Science
IEEE
電気学会
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering
Electric Works Specialist (third kind)
Electrical Work Person (second kind)
Multilevel converter
Project Year：
パワーエレクトロニクス学入門（改訂版）
河村篤男、横山智紀、船渡寛人、星伸一、吉野輝雄、吉本貫太郎、小原秀嶺（ Role： Joint author）
コロナ社 （ ISBN:978-4-339-00980-4 ）
Language：Japanese Book type：Scholarly book
交流電源にインターフェイスされる電力変換回路および制御技術調査専門委員会（ Role： Contributor , 第2章）
電気学会
Language：Japanese Book type：Report
フライングキャパシタマルチレベルコンバータによる電力変換器の波形改善および高パワー密度化に関する研究
小原 秀嶺
2015.9
No Setting Single Work
Over 99.7% Efficiency at 100 kW DC-DC Power Conversion using a 3.3 kV SiC Device and Discussion on Device dv/dt Estimation
Kawamura Atsuo, Tsuruta Yukinori, Obara Hidemine
IEEJ Journal of Industry Applications 13 ( 134 ) 426 - 436 2024.7 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人 電気学会 Joint Work
<p>This paper is a re-evaluation of a completed project (High Efficiency Demonstration Grant Using High Voltage SiC Device) from the perspective of accurate efficiency measurement; additionally, this paper discusses on device dv/dt estimation. A topology called the high-efficiency energy conversion system (HEECS), which is one variety of partial boost circuit topologies, is introduced to achieve efficiency over 99.5%. The topology exhibits a very high efficiency for applications in which the output voltage variation is within a certain ratio of the rated output voltage. This paper summarizes the basic features of the topology and theoretically derives the principle of high-efficiency realization. The high efficiency is measured by the back-to-back(BTB) connection of two converters, and the efficiency and accuracy on this method are theoretically derived and confirmed using the measured data of 3.3 kV output voltage at 100 kW output. The theoretical estimation of dv/dt for a 3.3 kV SiC device to reduce dual-active-bridge(DAB) soft-switching loss is discussed. Furthermore, a trend of DC-DC conversion efficiency is shown, and we show that the partial boost topology is a promising approach for achieving high efficiency dc-dc conversion.</p>
パルス振幅制御を適用した9レベルDABコンバータによる出力電圧範囲拡大の検討
堤 昂哉, 小原 秀嶺
電気学会論文誌Ｄ 144 ( 6 ) 2024.6 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Single Work
A Partial Active Gate Control for Improvement of a Trade-off Relation Between Surge Voltage and Efficiency in a Three-Phase Inverter
Van-Long Pham, Hidemine Obara, and Katsuhiro Hata
IEEE Transactions on Industry Applications 3 2024.1 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Single Work
Miguchi, Y; Obara, H; Kawamura, A
IEEE OPEN JOURNAL OF POWER ELECTRONICS 5 145 - 161 2024.1 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Joint Work
Survey of 99.9% Class Efficiency DC-AC Power Conversion and Technical Issues
Kawamura Atsuo, Miguchi Yasuhiko, Setiadi Hadi, Obara Hidemine
IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING 18 ( 1 ) 6 - 14 2023.1 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
十見百聞 伝統と革新の融合によるサステナブルな建築技術―業界を支える建築研究所の研究開発―
小原 秀嶺, 堤 昂哉, 古川 眞輝
電気学会誌 142 ( 3 ) 2022.3
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
十見百聞 エネルギーの「もったいない」を追求する―省エネと快適性を両立するオートメーション技術―
小原 秀嶺, 石橋 隆之, 伊藤 正悟, 海原 拓朗, 小袖 義貴
電気学会誌 139 ( 7 ) 2019.7
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
Students and Young Engineers Meeting Held at IPEC 2018-ECCE Asia
Ryuji Iijima, Yoshikazu Kuwabara, Daiki Yamaguchi, Yuta Yanagisawa, Yoshihiro Miwa, Hidemine Obara, … Show more authors
Ryuji Iijima, Yoshikazu Kuwabara, Daiki Yamaguchi, Yuta Yanagisawa, Yoshihiro Miwa, Hidemine Obara, Yongheng Yang Hide authors
IEEE Power Electronics Magazine 5 ( 3 ) 2018.9
Authorship：Corresponding author Language：English Publishing type：Meeting report Single Work
ソーラー・デカスロン・ヨーロッパ2014－千葉大学の挑戦
川瀬貴晴，田島翔太，小原 秀嶺，羽澄亮平，那須智子
太陽エネルギー学会誌「太陽エネルギー」 40 ( 6 ) 53 - 61 2014.12
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Single Work
線形増幅器、及び電力変換装置
小原 秀嶺，大野 達樹，片山 正也，河村 篤男
Application no：特願2017-47150 Date applied：2017.3
Country of applicant：Domestic
ゲート駆動装置
小原 秀嶺，和田 圭二
Application no：特願2016-166831 Date applied：2016.8
Country of applicant：Domestic
電力変換回路および装置
佐藤 之彦，小原 秀嶺，中島 昭，大橋 弘通，西澤 伸一
Application no：特願2013-186885 Date applied：2013.9.10
Country of applicant：Domestic
マルチレベル電力変換回路および装置
佐藤 之彦，小原 秀嶺，大橋 弘通，中島 昭，西澤 伸一
Application no：特願2012-201460 Date applied：2012.9.13
Patent/Registration no：特許2014-535533 Date issued：2016.10.21
Country of applicant：Domestic
論文査読促進賞
2021.5 電気学会産業応用部門
Individual or group name of awards：小原秀嶺
Best Paper Award
2019.11 IEEE International Future Energy Electronics Conference (IFEEC) 2019
Individual or group name of awards：Hidemine Obara
部門活動功労賞
2019.9 電気学会産業応用部門
Individual or group name of awards：小原秀嶺
電気学会半導体電力変換研究会 優秀論文発表賞
2013.6 電気学会
Individual or group name of awards：小原 秀嶺
電気学会産業応用部門大会 優秀論文発表賞
2011.9 電気学会
Individual or group name of awards：小原 秀嶺
Grant number：23H01394 2023.4 - 2026.3
Grant-in-Aid for Scientific Research(B)
Authorship：Principal investigator Grant type：Competitive
三次元運動制御を実現する６自由度円筒リニアモータの創製
Grant number：21H01306 2021.4 - 2024.3
Grant-in-Aid for Scientific Research(B)
Investigator(s)：下野 誠通
Authorship：Coinvestigator(s)
エネルギー回生可能な革新的双方向アクチュエータの実現
Grant number：21H04556 2021.4 - 2024.3
Grant-in-Aid for Scientific Research(A)
Investigator(s)：藤本 康孝
Authorship：Coinvestigator(s)
Grant number：20H02126 2020.4 - 2023.3
科学研究費補助金 Grant-in-Aid for Scientific Research(B)
Investigator(s)：小原 秀嶺
Authorship：Principal investigator Grant type：Competitive
フライングキャパシタ線形増幅回路の超多直列化によるノイズレスインバータの実現
2018.4 - 2020.3
科学研究費補助金
Authorship：Principal investigator Grant type：Competitive
スルーレート制御アクティブゲート駆動による電力変換回路の動作モードを考慮した損失低減法に関する研究
2023.2 - 2024.1
パワーアカデミー研究助成（萌芽研究）
Authorship：Principal investigator
SSTの高性能化に向けた回路・デバイス・制御技術の統合技術開発
2021.12 - 2026.3
Ministry of Education, Culture, Sports, Science and Technology 革新的パワーエレクトロニクス創出基盤技術研究開発事業
デジタルアクティブゲート技術を駆使したノイズフリー・パワエレ電力ネットワークの創生
2021.10 - 2024.9
ＮＥＤＯ先導研究プログラム 未踏チャレンジ２０５０
Authorship：Coinvestigator(s)
新世代Si-IGBTと応用基本技術の研究開発
2017.4 - 2020.3
NEDO 低炭素社会を実現する次世代パワーエレクトロニクスプロジェクト
Investigator(s)：平本俊郎
Study on Application of Multi-Level Converter to Realize Fast Current Control in DC Micro-Grid with Extremely Low Impedance Interconnections
Masaya Katayama, Tatsuki Ohno, Hidemine Obara, and Atsuo Kawamura
IEEE PEDS 2017
Event date： 2017.12
Language：English Presentation type：Oral presentation (general)
Venue：Honolulu, USA
DOI: 10.1109/PEDS.2017.8289205
Browse Conferences > Power Electronics and Drive S... Flying-capacitor linear amplifier to realize both high-efficiency and low distortion for power conversion applications requiring high-quality waveforms
Tatsuki Ohno, Masaya Katayama, Hidemine Obara, Atsuo Kawamura
2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS)
Event date： 2017.12
Language：English Presentation type：Oral presentation (general)
Venue：Honolulu, HI, USA
DOI: 10.1109/PEDS.2017.8289202
Range extension of electric vehicles by two battery HEECS chopper based power train
Ayato Tamura, Koji Kobayashi, Yukinori Tsuruta, Kazuaki Kojima, Hidemine Obara, Atsuo Kawamura
2017 IEEE Energy Conversion Congress and Exposition (ECCE)
Event date： 2017.11
Language：English Presentation type：Oral presentation (general)
Venue：Cincinnati, OH, USA
DOI: 10.1109/ECCE.2017.8096770
Power electronics 2.0: IoT-connected and Al-controlled power electronics operating optimally for each user
Makoto Takamiya, Koutaro Miyazaki, Hidemine Obare True Sai
2017 29th International Symposium on Power Semiconductor Devices and IC's (ISPSD)
Event date： 2017.6
Language：English Presentation type：Oral presentation (general)
Venue：Sapporo, Japan
10.23919/ISPSD.2017.7988875
Total volume reduction of passive components in Grid-connected converters by introducing flying capacitor multilevel topology
Sae Mochidate, Yukihiko Sato, Tomotate Ito, Hidemine Obara
2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)
Event date： 2017.6
Language：English Presentation type：Oral presentation (general)
Venue： Kaohsiung, Taiwan
DOI: 10.1109/IFEEC.2017.7992098
電動ハイブリッド推進系用パワエレ機器性能推定ツール構築
Offer organization: 宇宙航空研究開発機構（JAXA） Funded Research offered by Enterprises
Project Year： 2021.8 - 2022.2
高昇圧高効率電力変換器の研究
Offer organization: アルプスアルパイン株式会社，千葉大学 Cooperative Research within Japan
Project Year： 2021.6 - 2022.3
パワー半導体パッケージおよびパワーモジュールの内部熱インピーダンス抽出法に関する研究と開発
Offer organization: アンソフト・スピリット株式会社 Cooperative Research within Japan
Project Year： 2020.11 - 2021.10
パワーエレクトロニクス用無線センサの開発
Cooperative Research within Japan
Project Year： 2019.7 - 2020.1
インテリジェントデジタルモジュールを実現する多直列制御技術のFS研究
Offer organization: 一般社団法人NPERC-J Funded Research offered by Enterprises
Project Year： 2019.4 - 2021.9
2025 Power Electronics
College of Engineering Science
2025 Advanced Power Electronics
Graduate school of Engineering Science
2025 Advanced controll and energy system design S
Graduate school of Engineering Science
2025 Advanced controll and energy system design F
Graduate school of Engineering Science
2025 Advanced controll and energy system demonstration S
Graduate school of Engineering Science
パワーエレクトロニクス
2018.4 Institution：中央大学
Level：Undergraduate (specialized)
電気学会東京支部役員会
2023.5 協議員
Committee type：Academic society
デジタル技術を活用したパワーエレクトロニクス教育に関する協同研究委員会
2022.10 - 2024.9 委員
Committee type：Academic society
応用拡大に向けたマルチレベル電力変換技術調査専門委員会
2022.9 - 2025.8 幹事
Committee type：Academic society
2022年電気学会産業応用部門大会実行委員会
2022.7 - 2023.3 委員
Committee type：Academic society
電気学会令和５年全国大会グループ委員会
2022.6 - 2023.6 ６グループ委員
Committee type：Academic society
横浜パワーエレクトロニクスカレッジ
Role(s)： Lecturer, Planner
YUVEC 2020.4
Impact of Multi-Level Converter on Motion Control and Micro-Grid Applications
Role(s)： Guest
Beijing Power Electronics Society Academic Report Tsinghua University 2016.9
