著者
澤田 純兵 茂木 進一 南 政孝 道平 雅一
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.138, no.1, pp.86-87, 2018-01-01 (Released:2018-01-01)
参考文献数
3

Generally, in electric equipment, a large inrush current flows in the capacitor when the power is turned on. The inrush current causes deposition of terminals and switches, melting of fuses, and so on. Therefore, conventional inrush current prevention circuits using an electrical relay and a controller are provided. However, the use of electrical relay enhances concern about an increase in cost and charge-time. In order to solve these problems, this paper proposes the inrush current prevention circuit without electrical relay. In this paper, the authors examine the effectiveness of the proposed circuit from experimental results.
著者
南 政孝 茂木 進一 道平 雅一
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌D(産業応用部門誌) (ISSN:09136339)
巻号頁・発行日
vol.139, no.2, pp.NL2_10, 2019-02-01 (Released:2019-02-01)

Our laboratory focuses on power electronics, energy storage applications, and renewable energy systems.
著者
井本 涼太 茂木 進一 道平 雅一 西田 保幸
出版者
パワーエレクトロニクス学会
雑誌
パワーエレクトロニクス学会誌 (ISSN:13488538)
巻号頁・発行日
vol.40, pp.176-181, 2014-03-31 (Released:2016-04-08)
参考文献数
7
被引用文献数
10 13

A three-phase voltage-fed converter operated by a two-phase PWM scheme offers relatively high ac voltage, low switching times, and low switching losses in comparison to that operated by a three-phase PWM scheme. However, the harmonics involved in the ac-side voltages and currents produced in the two-phase PWM scheme are distributed over a wide frequency range, which can be a significant drawback depending on its applications. Therefore the authors examine the problem using wavelet transform.
著者
南 政孝 塩井 太介 茂木 進一 道平 雅一
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)
巻号頁・発行日
vol.139, no.4, pp.280-286, 2019-04-01 (Released:2019-04-01)
参考文献数
43
被引用文献数
2

The grid connection inverter is built in the PCS (Power Conditioning Subsystem) for the distributed power supply, such as photo voltaic system. In order to utilize the power source, it is necessary that the grid connection inverter of the PCS predicts the load and output fluctuation in customer side. Therefore, this paper investigates a load estimation in the grid connection inverter of the PCS. The proposed estimation method adds superimposing perturbative signals in the inverter reference. The validity of the proposed estimation method is experimentally verified. In addition, the perturbative signals for load estimation consist of three different frequency components. As the result, it is experimentally clarified the proposed method improves the estimation accuracy.
著者
赤松 慶治 道平 雅一 舟木 剛 河崎 善一郎 松浦 慶士
出版者
The Institute of Electrical Engineers of Japan
雑誌
電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)
巻号頁・発行日
vol.121, no.4, pp.442-448, 2001-04-01 (Released:2008-12-19)
参考文献数
19
被引用文献数
2

In recent years, the harmonics and EMI noise sent out from an electric power conversion system are getting a great deal of attention in electromagnetic environment problems. So, the considerations for mentioned above have been getting important. Therefore, there is need to do a detail frequency analysis such as transient phenomena at the switching. So, we have proposed the analytic technique using Wavelet-transform which is possible to catch a phenomenon from the both sides of the time and the frequency. In this paper, we performed the analysis using Wavelet-transform against the actual measured date at the switching interval. Then, based on obtained result, we describe the high validity of Wavelet-transform and the application to the power electronics field.
著者
茂木 進一 枡川 重男 西田 保幸 道平 雅一 南 政孝
出版者
神戸市立工業高等専門学校
雑誌
基盤研究(C)
巻号頁・発行日
2014-04-01

一般に,交流/直流電力変換器は,新幹線,ハイブリッド自動車,太陽光発電用パワーコンディショナなどの多くのアプリケーションで使用されている.そこで本研究では,交流/直流電力変換器に最適なパルス幅変調(Pulse Width Modulation; PWM)法を明らかにする.具体的には,高調波フィルタを接続しないモータドライブシステムには指令値シフト二相PWM法が,太陽光発電用パワーコンディショナや高調波フィルタを接続するモータドライブシステムにはパルス重畳二相PWM法が適していることを明らかにした.