Kagoshima University · Graduate School of Science and Engineering · 教授

Research keywordsコンバータ・チョッパ・Inverter・Converter・AC motor drives・パワーエレクトロニクス・交流電動機駆動・インバータ・ACモータ駆動・直接トルク制御

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• Shinohara A., Yamamoto K. . Study of Direct Torque Control with Reference Flux Vector Calculation for Position Sensorless IPMSM Drives with High-Frequency Signal Injection . 2024 27th2024 · 担当区分： 筆頭著者, 最終著者, 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） 出版者・発行元： 2024 27th International Conference on Electrical Machines and Systems Icems 2024 This study verifies that high-frequency (HF) signal injection method for position sensorless control can be applied to interior permanent magnet synchronous motor (IPMSM) drive with reference-flux-vector-calculation-based direct torque control (RFVC DTC). There are many reports of position sensorless IPMSM drives with several DTC scheme combined with HF signal injection method. However, the drives with RFVC DTC has not been reported yet. This paper clarifies that RFVC DTC can be also combined with HF signal injection method for position sensorless IPMSM drives as well as other DTC schemes. Simulation and experimental results validate the position sensorless IPMSM drive with RFVC DTC. DOI： 10.23919/ICEMS60997.2024.10920911 Scopus
• Yamashita T., Shinohara A., Yamamoto K. . A Reference Flux Calculation Method Using Local Search Algorithm for Maximum Efficiency Operation in Direct Torque Controlled IPMSM Drives . 22024 · 担当区分： 最終著者 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） 出版者・発行元： 2024 27th International Conference on Electrical Machines and Systems Icems 2024 This paper proposes a reference flux linkage calculation method for realizing maximum efficiency operation in direct torque controlled interior permanent magnet synchronous motor (IPMSM) drive systems. The proposed method minimizes the input power of IPMSM with using a simple local search algorithm. The proposed method does not use IPMSM parameters such as d- and q-axes inductances, therefore, the proposed method is robust to parameter variations and model mismatches due to magnetic saturation. Simulation and experimental results validate the proposed method. DOI： 10.23919/ICEMS60997.2024.10921290 Scopus
• 篠原 篤志、前村 貴斗、山本 吉朗 . 直接トルク制御を用いたIPMSM駆動システムにおいて最大効率運転を実現する指令値計算法 . 電気学会論文誌Ｄ（産業応用部門誌）144 ( 4 ) 166 - 174 2024年4月2024 · 担当区分： 最終著者 記述言語： 日本語 掲載種別： 研究論文（学術雑誌） DOI： 10.1541/ieejias.144.166
• Yamamoto K., Nakahira T., Shinohara A. . Power Fluctuation Suppression Under Distorted Grid Voltage in Wind Power System Using Wound Rotor Induction Generator . 2024 27th International2024 · 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） 出版者・発行元： 2024 27th International Conference on Electrical Machines and Systems Icems 2024 This paper proposes a suppression method of power fluctuation of wind power systems using wound rotor induction generator. Especially, fluctuation at 6 times the grid frequency caused by distorted grid voltages is our main target. Wind power systems are commonly installed at the end of the power system, where grid voltages distort due to asymmetrical loads or difference in transmission line impedances. In this case, component at 6 times the grid frequency is generated in the generated power. Though methods for suppressing power fluctuation for grid voltage distortion have been investigated by authors, these methods were not effective enough when the phases of the 5^th and 7th harmonics in the grid voltage were shifted from the phase of the fundamental component. In this paper, first, components at 6 times the grid frequency of generated power of a wind power system using wound rotor induction generator are analyzed. Next, the harmonic current references which minimize the components are derived. Furthermore, simulation results demonstrate that harmonic current control using the derived references can minimize the components at 6 times the grid frequency of the power even when the phases of the 5^th and the 7th harmonics are shifted from the fundamental component. DOI： 10.23919/ICEMS60997.2024.10920970 Scopus

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