著者
嶋田 陽 能美 雄貴 近藤 圭一郎
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.134, no.1, pp.10-18, 2014-01-01 (Released:2014-01-01)
参考文献数
13
被引用文献数
3 7

An unbalanced input voltage three-level inverter can be applied to boost the input voltage by employing energy storage devices, such as the electric double layer capacitor (EDLC), in order to enhance the motor output performance. However, the unbalanced input DC voltage limits the output power and generates particular voltage harmonics. In this paper, the harmonic characteristics, a method to change the power distribution and the limit of the power distribution when the ratio of the DC source voltage to the EDLC voltage is changed are discussed.
著者
若林 良明
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.137, no.3, pp.145-148, 2017-03-01 (Released:2017-03-01)
参考文献数
8

1.はじめに鉄道車両駆動システムへのパワーエレクトロニクスの応用は,1960年代からの電力用サイリスタおよびダイオードの進展とともに始まった。1970年代サイリスタ式チョッパ制御装置の実用化から始まり,大容量GTO(ゲートターンオフ)サイリスタの
著者
釜我 昌武 成 慶〓 大橋 弘通
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.128, no.5, pp.569-576, 2008-05-01 (Released:2008-05-01)
参考文献数
31
被引用文献数
1 6

In this paper, a power converter in combination of 1200V Si-IGBT and SiC-SBD is investigated for decrease of devise loss in compare with Si-PiN diode. To use device simulation which is based on considering of switching experimental results and static characteristics is employed to estimate device loss. In device simulation, also, we adjust an anode injection efficiency of Si-IGBT to increase switching speed and optimize trade-off relation between on-state voltage and switching loss of Si-IGBT due to minimize total device loss. As the device simulation result, the switching frequency of in combination optimized Si-IGBT and SiC-SBD has approximately three times as high as Si-IGBT with Si-PiN diode. Moreover, in this paper, the limitation of switching frequency by comprehensive total device loss with present heat cooling ability is discussed.
著者
古賀 義紀
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.114, no.1, pp.23-27, 1993-12-20 (Released:2008-04-17)
参考文献数
6
著者
黒﨑 紘史 白畑 紘夢 川原 潤也 近藤 康人 近藤 健 李 範爽 小田垣 雅人
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.143, no.5, pp.532-538, 2023-05-01 (Released:2023-05-01)
参考文献数
20
被引用文献数
1

In this study, we developed a capacitive seating analysis sensor using a conductive textile for evaluating a Seating Motion. Physical burden on caregivers is a common problem at nursing care sites. Developing long-term caregiving skills can help reduce the physical burden on amateur caregivers. Several quantitative evaluation studies have focused on the skills of caregivers. However, such evaluation is highly expensive and require huge area because it involves the use of motion capture systems with several 3D cameras for dynamic motion analysis. In our previous study, we developed a conductive textile sensor for measuring the seating position of a care recipient in a wheelchair. The sensor could measure either seating body pressure or distance between the buttocks and the seat. The system can measure the care recipient's motion without requiring any motion capture system. We recommend using the sensor to evaluate the skills of caregivers; the sensor output can be used to determine the seating speed of the care recipient on the chair. Herein, we report the validity of the measurement system comprising a conductive textile-based capacitive seating analysis sensor for evaluating seating in nursing care.