担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

The parallelling of power semiconductor devices is essential for desired current ratings and the system is prone to the current unbalancing due to parameter variations. SiC devices with significant variable threshold voltage due to manufacturing yield and temperature distribution have a consequential possibility of dynamic current unbalancing. This paper presents the peak detection-based current balancing of parallel-connected SiC devices to minimize the turn-on and turn-off current unbalancing. PCB current sensors are used for the measurement and feedback of the signal for this peak detection-based current balancing mechanism.

DOI： 10.1016/j.microrel.2025.115688

DOI： 10.1016/j.microrel.2025.115688

その他リンク： https://www.sciencedirect.com/science/article/pii/S0026271425001015

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

In this article, the development of multi-functional grid connected solar photovoltaic (PV) system using improved Fractional order Control theory-based Pole fixed Second Order Generalized Integrator (FO-PFSOGI) is proposed. The fractional order (FO) control technique offers an advantage to adjust the fixed structure of the integer order and provide additional degree of freedom to achieve accurate response during the system operation. The FO-PFSOGI control technique is used to extricate fundamental constituent of the non-sinusoidal load current. The PV system is competent of feeding the local load requisite and may also inject surplus power into the grid. The voltage source converter (VSC) utilized in the grid-connected system can also be operated as power quality compensator, taking care of harmonics, unbalancing and excess reactive power demand of the local load. The feasibility of multifunctional operations of the converter is established in this article, thus achieving maximum utilization of the power electronics used in the system and reducing the overall cost. A performance comparison of the developed control technique is presented with the conventional techniques in terms of harmonic compensation, weight convergence and computational complexity. The implementation of the controller is modest and extracts fundamental quantities without any phase delay under different loading conditions. The developed system is validated using both simulation and experimental study. A scaled down experimental setup of grid-connected PV system is implemented in the laboratory and real time performance of the FO-PFSOGI is demonstrated using variations in system load and PV irradiance.

DOI： 10.1049/pel2.12823

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85209773720&origin=inward

担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Generation of green hydrogen based on solar energy is significantly dependent upon photovoltaic (PV) panel energy, which is reliant on the stochastic and intermittent global horizontal irradiance (GHI). Further, if inconsistent power output from PV panels due to influence of noise interferes with continuous supply of energy needed for electrolysis process, then reliable generation of green hydrogen may be impacted. Therefore, in this study, preliminary fast fourier transform (FFT) technique for noise removal is utilized and thereafter, singular spectrum analysis (SSA) algorithm is integrated with Gated Recurrent Unit (GRU) in order to enhance the accuracy during forecasting of green hydrogen reliant on GHI at multiple time steps. The suggested methodology is assessed using GHI dataset for Jaipur site (Rajasthan, India) obtained from National Institute of Wind Energy (NIWE) portal. The monthly average prediction for solar energy centered green hydrogen generation by employing the proposed methodology at Jaipur location corresponds between 0.010 kg/m2 (10 × 103 kg/km2) to 0.020 kg/m2 (20 × 103 kg/km2) in diverse circumstances. The suggested forecasting algorithm provides a reliable and precise methodology that will significantly supports low-carbon economy goals.

DOI： 10.1016/j.ijhydene.2024.09.389

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85205934236&origin=inward

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

It is tough and complex to forecast wind speed due to its intermittent and stochastic nature as well as sudden and abrupt variations in the wind speed. Further, it is required to handle the variety of scenarios e.g. cyber-attacks, unexpected power device malfunction, communication/sensor outages etc. that can cause the missing data.This paper proposes and employs a de-noising autoencoder algorithm for wind speed forecasting to ensure the handling of missing data information. At the next step, the data is processed via variational mode decomposition technique to mitigate the noise and improves the model's prediction accuracy. Furthermore, the bi-directional long-short term memory deep learning approach is tied with convolution neural network to increase prediction accuracy and anticipating the sudden/abrupt changes in wind speed accurately. Finally, actual wind speed related data is examined to scrutinize meticulousness of projected forecast methodology particularly during sudden/abrupt changes in the wind speed. The parameter indicators of the wind speed forecasting technique exhibit the capability of improved predictions under the diversified conditions.

DOI： 10.1049/rpg2.13124

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85206947373&origin=inward

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Italy   2023年05月22日  -  2023年05月25日

The parallelling of power semiconductor devices is essential for desired current ratings and the system is prone to the current unbalancing due to parameter variations. SiC devices with significant variable threshold voltage due to manufacturing yield and temperature distribution have a consequential possibility of dynamic current unbalancing. This paper presents the peak detection-based current balancing of parallel-connected SiC devices to minimize the turn-on and turn-off current unbalancing. PCB current sensors are used for the measurement and feedback of the signal for this peak detection-based current balancing mechanism.

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85170650070&origin=inward

開催期間： 2025年05月11日 - 2025年05月14日   記述言語：英語   開催地：Bengaluru, India   国名：インド  

This paper proposes a fully Soft-switched AC/DC Converter (FSADC) for 800V onboard charger applications. A Zero Voltage Transient (ZVT) cell is integrated into a Bridgeless Boost (BB) PFC to provide soft switching for all the semiconductor devices in the circuit. The main switch turns ON and OFF with Zero Voltage (ZVS), and the main diode turns OFF with Zero Current (ZCS). Since switching loss is eliminated, the proposed converter can operate at high frequencies such as 500kHz. The high-frequency operation enables the use of a PCB winding planar inductor that significantly reduces the volume and cost of the OBC and contributes to efficiency improvements. A snubber inductor is integrated into the main inductor, sharing a portion of the magnetic components that further reduce the volume and cost of the circuit. A 6.6kW prototype with PCB winding integrated planar magnetic is built and tested to prove the superiority of the proposed converter.

開催期間： 2024年11月26日 - 2024年11月29日   記述言語：英語   国名：日本国  

その他リンク： https://ieeexplore.ieee.org/document/10921119

開催期間： 2024年11月26日 - 2024年11月29日   記述言語：英語   国名：日本国  

その他リンク： https://ieeexplore.ieee.org/document/10920907

開催期間： 2024年09月12日 - 2024年09月26日   記述言語：英語   開催地：Parma, Italty   国名：イタリア共和国  

The parallelling of power semiconductor devices is essential for desired current ratings and the system is prone to the current unbalancing due to parameter variations. SiC devices with significant variable threshold voltage due to manufacturing yield and temperature distribution have a consequential possibility of dynamic current unbalancing. This paper presents the peak detection-based current balancing of parallel-connected SiC devices to minimize the turn-on and turn-off current unbalancing. PCB current sensors are used for the measurement and feedback of the signal for this peak detection-based current balancing mechanism.

開催期間： 2023年05月22日 - 2023年05月25日   記述言語：英語   開催地：Jeju   国名：大韓民国  

This paper proposed an Electrolytic Capacitor-less (Ecap-less) 800V onboard charger (OBC) based on a Half-bridge Split Capacitors Power Decoupling (HSC-PD) circuit. A new design and control method proposed for HSC-PD to minimize the capacitance needed for the dc-link of the OBC enables the deployment of Film capacitors (Fcap) only.

その他リンク： https://ieeexplore.ieee.org/document/10213494

開催期間： 2024年11月22日 - 2024年11月23日   発表言語：英語   講演種別：基調講演  

受賞国：日本国

Japan Medal は IEEE 国内会員がシニアメンバーに昇格した際に記念品として各支部より贈
呈しており、2020 年に創設されました。メダルには、日本の電気技術の先覚者、平賀源内氏
の肖像(早稲田大学中央図書館より使用許諾)とエレキテルが描かれています。本メダルは日本国貨幣等の製造を行う造幣局で製作しており、偽造防止にも活用される「潜像」技術(角
度により異なる文字が表示)が使用されています。

研究区分：共同研究

科目区分：大学院専門科目

生体親和型制御システムや環境配慮型電子デバイスを構築するのに必要な基礎的な計測技術、制御技術、信号処理技術、デバイス構造解析技術に関して、汎用のハードウェア及びソフトウェアを用いた演習を行う。マイクロコンピュータを用いて、パワーエレクトロニクス回路とのディジタル信号の入出力に関する制御技術を習得する

科目区分：大学院専門科目

生体親和型制御システムや環境配慮型電子デバイスを構築するのに必要な基礎的な計測技術、制御技術、信号処理技術、デバイス構造解析技術に関して、汎用のハードウェア及びソフトウェアを用いた演習を行う。マイクロコンピュータを用いて、パワーエレクトロニクス回路とのディジタル信号の入出力に関する制御技術を習得する

科目区分：学部専門科目  国名：インド

科目区分：学部専門科目  国名：インド

対象： 教育関係者,　研究者

種別：講演会

対象： 大学生,　大学院生,　教育関係者,　研究者

種別：講演会

Delivered a technical talk on "Gate Driving and Control for Power Electronics Systems" under the aegis of IEEE PELS and IAS-PES SB Chapters Thapar Institute of Engineering and Technology (Deemed to be University), Patiala, Punjab, India, and IEEE PELS-IES, PES-IAS Delhi Chapters, and IEEE Education Society Delhi Chapter.

Visited the Rajiv Gandhi Institute of Petroleum Technology, India.
>>Meeting and interaction with Director of the RGIPT, Deans and other personals; discussion for future extensive collaborations between Kyutech and RGIPT.
>>Meeting to the Head of Electrical and Electronics Engineering (EEE) Dept. and faculty members; presentation and interaction with EEE department.
>>Meeting with Dean Research and Development, Dean academic affairs and head of departments HoDs; presentation regarding Kyutech and discussion for future collaborations.
>>Interaction with students and presentation regarding Kyutech.