University of the Ryukyus · Faculty of Engineering · 教授

Research keywords電気機器工学・電気電子・機械・材料工学

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• 局所的最大電力点から脱出可能な高速MPPT制御アルゴリズム2024 · <p>The power-voltage (PV) characteristic of a photovoltaic (PV) string has multiple local maxima under partial shading conditions (PSCs). Maximum power point tracking (MPPT) control needs both accuracy and fast speed. However, due to the trade-off between accuracy and tracking speed, MPPT methods that complement them are not yet complete. Another issue is the inability to detect changes in the high-voltage side local maxima when operating at the low-voltage side maximum power point. This study proposes an MPPT method based on a system with current sensors in each module. This proposed method can detect individual short-circuit currents and estimate the maximum power point quickly and accurately, furthermore respond to changes in all power points. Through simulations, the MPPT method is compared with the conventional method (scan method) in terms of tracking time and accuracy．</p>
• Enhancing Electric Vehicle Power Management with Dynamic Power Allocation2024 · Chintala Gnanasekar Hariharan, Naomitsu Urasaki, Girish Ganesan Ramanathan
• A Study of Grid-Connected Residential PV-Battery Systems in Mongolia2023 · Baigali Erdenebat, Davaanyam Buyankhishig, Sergelen Byambaa, Naomitsu Urasaki
• BESS based voltage stability improvement enhancing the optimal control of real and reactive power compensation2022 · Habibullah Feday, Mikaeel Ahmadi, Abdul Basir Faiq, Naomitsu Urasaki, Tomonobu Senjyu

• 極低速センサレスドライブ実現に向けた高精度デッドタイム補償電圧の開発2006 · 若手研究(B)
• ニューラルネットワークによる電動機の高効率運転に関する研究2001 · 若手研究(B)
• モータドライブの高効率運転法に関する研究
• モータドライブにおける電源システムに関する研究

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