Takamasa Hayasaka
Railway Technical Research Institute
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Publication
Featured researches published by Takamasa Hayasaka.
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit | 2016
Takamasa Hayasaka; Masatoshi Shimizu; Hirofumi Akagi
A measured contact-loss ratio is used to estimate current-collection performance. There are two types of methods used to estimate the contact-loss ratio. One is to measure all the contact losses, including small ones; the other is to measure only contact losses that are greater than 5 ms in duration. The extent of wear of a contact strip caused by arc discharges varies as a function of the amount of electric charge. This fact makes it possible to manage the wear on a contact strip. This paper shows a calculation method for the amount of electric charge based on the output of a contact-loss measurement as well as the expected lifetime of the contact strip and the creation of a maintenance threshold level for of the contact strip.
Quarterly Report of Rtri | 2009
Takamasa Hayasaka; Masatoshi Shimizu; Kazuyoshi Nezu
ICEC 2014; The 27th International Conference on Electrical Contacts; Proceedings of | 2014
Yoshitaka Kubota; Takamasa Hayasaka; Toru Miyauchi; Hidehiko Nozaki; Tadahiko Hirai; Taihei Matsumoto
Ieej Transactions on Industry Applications | 2012
Takamasa Hayasaka; Yoshitaka Kubota
Ieej Transactions on Industry Applications | 2014
Takamasa Hayasaka; Masatoshi Shimizu; Hirofumi Akagi
Archive | 2009
Takamasa Hayasaka; Takehiro Kobayashi; Fumio Okimoto; Masatoshi Shimizu; 武弘 小林; 高雅 早坂; 文男 沖本; 政利 清水
Ieej Transactions on Industry Applications | 2018
Kazuhiko Ito; Takamasa Hayasaka; Syuzou Miyazaki; Keiji Kawahara
Ieej Transactions on Sensors and Micromachines | 2015
Takamasa Hayasaka; Hirofumi Akagi
Ieej Transactions on Industry Applications | 2015
Mizuki Tsunemoto; Takamasa Hayasaka; Masatoshi Shimizu; Kenji Chikanari
Japanese railway engineering | 2014
Masatoshi Shimizu; Takamasa Hayasaka
