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工学教育研究部 工学科電気電子システムプログラム担当 |
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助教 |
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論文 【 表示 ／ 非表示 】
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Optimal Wireless Power Transfer Circuit without a Capacitor on the Secondary Side 査読あり
Akbar S.R., Setiawan E., Hirata T., Hodaka I.
Energies 16 ( 6 ) 2922 - 2922 2023年3月
掲載種別：研究論文（学術雑誌） 出版者・発行元：Energies
This study proposes an approach to obtain maximum power via wireless power transfer using a single primary-side capacitor. It is shown that higher power is achieved when compared to the common wireless power transfer circuit under resonance with dual (primary- and secondary-side) capacitors. This approach is divided into three phases. By choosing the capacitor and frequency as freely assignable variables, we symbolically obtain a formula that allows us to determine the optimized capacitance and frequency for maximum power. To verify our method, we used a numerical analysis and compared it with an electronic circuit simulation. The symbolic formula is able to maintain maximum power despite changes in load or in the coupling coefficients.
DOI： 10.3390/en16062922
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A Practical Method for Estimating Mutual Inductance in Wireless Power Transmission System 査読あり
Nakamura T., Hirata T., Setiawan E., Hodaka I.
International Journal of Circuits, Systems and Signal Processing 16 1027 - 1034 2022年
掲載種別：研究論文（学術雑誌） 出版者・発行元：International Journal of Circuits, Systems and Signal Processing
This paper proposes a practical method for estimating mutual inductance in wireless power transmission system based on the principle of electromagnetic induction. Conventional estimation methods utilize a voltage, current, and phase of current in transmitter side, while our method requires only an amplitude of the voltage and current in transmitter side. Our method is designed so that the mutual inductance can be estimated under challenging situation which there is a measurement noise. Numerical simulations show that if the system has a small mutual inductance, a relative error and standard derivation of estimated mutual inductance tend to become larger. However, it will be shown that these factors can be improved to make a voltage of voltage source in the system high.
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The Frequency Response and Steady-State analysis on Wireless Power Transfer using Square Wave Input 査読あり
Akbar S., Setiawan E., Hirata T., Yamaguchi K., Hodaka I.
ACM International Conference Proceeding Series 38 - 43 2021年9月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：ACM International Conference Proceeding Series
Finding optimal frequency for the voltage source is important in Wireless Power Transfer (WPT) since it can make the system deliver high power to the receiver. Therefore, it is essential to visualize and analyze the frequency peak locations to ensure the system can use the correct frequency. This paper proposes a model to obtain a set of peaks that lies in some frequency range in a WPT system using square wave input. Thus, using this model, alternatives of peak frequency other than the global peak can be observed. Moreover, this study also proposes the steady-state function of the WPT system. The proposed model and steady-state analysis are compared with the experimental results and Simulation Program with Integrated Circuit Emphasis (SPICE). The comparison verified that the proposed model illustrates the steady-state response and shows the set of peak operating frequency.
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Arduinoを用いたシーケンス制御学習用ソフトウェアの開発 査読あり
平田拓也, 日高 義浩
技能科学研究 34 ( 1 ) 149 - 155 2018年3月
掲載種別：研究論文（研究会，シンポジウム資料等）
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Power efficiency improvement of wireless power transfer using magnetic material 査読あり
Morita S., Hirata T., Setiawan E., Hodaka I.
Proceedings of 2017 2nd International Conference on Frontiers of Sensors Technologies, ICFST 2017 2017-January 304 - 307 2017年12月
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：Proceedings of 2017 2nd International Conference on Frontiers of Sensors Technologies, ICFST 2017
Efficiency improvement of wireless power transfer system is studied using ferrite bars with keeping distance of electric power transmission. Experiments are performed to decide better installation of ferrite bars for improving efficiency; there are many possibilities how and where to install them. We conducted several experiments and devised a method of installing ferrite bar with high effect on WPT. Each result is compared with the case of no ferrite bar system. The result of experiments shows using ferrite bars is practical and cost effective. Some suggestion is given to drive wireless power transfer system with lower frequency, which is also noteworthy about the limitation of available power source.
講演・口頭発表等 【 表示 ／ 非表示 】
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手描き電気回路図の認識について
竹本 茉倫, 平田 拓也
2024年度（第75回）電気・情報関連学会 中国支部連合大会 2024年10月26日
開催年月日： 2024年10月26日
記述言語：日本語 会議種別：口頭発表（一般）
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設置から20年経過した太陽電池モジュールの潜在的故障について
道田竜一, 岡村裕太, 野坂優介, 平田拓也, 藤井雅之, 南野郁夫, 濱田俊之, 桶真一郎, 石倉規雄
2020 年度 (第 71 回) 電気・情報関連学会中国支部連合大会 2020年10月24日
開催年月日： 2020年10月24日
会議種別：口頭発表（一般）
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静電気力を利用した雲を構成する微小水滴の収集方法の実験的検討
松村 彪吾, 西依 輝, 國本 優真, 平田 拓也
2020 年度 (第 71 回) 電気・情報関連学会中国支部連合大会 2020年10月24日
開催年月日： 2020年10月24日
会議種別：口頭発表（一般）
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太陽電池モジュールごとのI-Vカーブ計測装置の開発
道田竜一, 平田拓也, 藤井雅之
2019年度（第70回）電気・情報関連学会中国支部連合大会 2019年10月26日
開催年月日： 2019年10月26日
記述言語：日本語 会議種別：口頭発表（一般）