Development of the Lead-Free Carbon Brush Material for Starters. - Ryoichi Honbo; Koichiro Sawa; Youichi Murakami; Hiroyuki Wakabayashi; Naruhiko Inayoshi; Kyoji Inukai; Takeshi Shimoyama; Naoki Morita (IEICE Trans. Electron., 2005)

Characteristic Analysis and Enhancement of Sensing Property for Eddy-Current Type Proximity Sensor. - Koichi Koibuchi; Koichiro Sawa; Takashi Honma; Takumi Hayashi; Kuniyoshi Ueda; Hiroshi Sasaki (IEICE Trans. Electron., 2005)

Fabrication Process of Nonarcing Power MEMS Switch. - Yu Yonezawa; Noboru Wakatsuki; Yoshio Satoh; Tadashi Nakatani; Koichiro Sawa (IEICE Trans. Electron., 2005)

Consideration on Contact Mechanism of YBaCuO Bulk Superconductor with Deposited Metal Layer. - Hiroyuki Fujita; Katsuya Fukuda; Koichiro Sawa; Masaru Tomita; Masato Murakami; Naomichi Sakai; Izumi Hirabayashi (IEICE Trans. Electron., 2007)

Development of the Lead-Free Brush Material for the High-Load Starter. - Ryoichi Honbo; Youichi Murakami; Koichiro Sawa; Hiroyuki Wakabayashi; Naruhiko Inayoshi; Kyoji Inukai; Takeshi Shimoyama; Naoki Morita (IEICE Trans. Electron., 2007)

Numerical Study on Electromagnetisms and Material Characteristics of Magnetic Flux Shield for Eddy-Current Type Proximity Sensor. - Koichi Koibuchi; Koichiro Sawa; Takashi Honma; Takumi Hayashi; Kuniyoshi Ueda; Hiroshi Sasaki (IEICE Trans. Electron., 2007)

A Study on Wear of Brush and Carbon Flat Commutator of DC Motor for Automotive Fuel Pump. - Koichiro Sawa; Takahiro Ueno; Hidenori Tanaka (IEICE Trans. Electron., 2010)

Influence of Voltage on Arc Characteristics and Electrode Mass Change of AgNi Contacts for Electromagnetic Contactors. - Kiyoshi Yoshida; Koichiro Sawa; Kenji Suzuki; Masaaki Watanabe (IEICE Trans. Electron., 2011)

Effect of Lubricant on Lifetime of Au-Plated Slip-Ring and Ag-Pd-Cu Brush System for Small Electric Power. - Koichiro Sawa; Yasunori Suzuki; Noboru Morita; Kaoru Endo; Takahiro Ueno (IEICE Trans. Electron., 2012)

Influence of Arc Discharge on Contact Resistance of AgNi Contacts for Electromagnetic Contactors. - Kiyoshi Yoshida; Koichiro Sawa; Kenji Suzuki; Masaaki Watanabe (IEICE Trans. Electron., 2012)

Evaluation of Basic Dynamical Parameters in Printed Circuit Board - Mass, Force, and Acceleration -. - Shin-ichi Wada; Koichiro Sawa (IEICE Trans. Electron., 2013)

Fundamental Characteristics of Arc Extinction at DC Low Current Interruption with High Voltage (<500V). - Koichiro Sawa; Masatoshi Tsuruoka; Makito Morii (IEICE Trans. Electron., 2016)

A Method for Evaluating Degradation Phenomenon of Electrical Contacts Using a Micro-Sliding Mechanism - Minimal Sliding Amplitudes against Input Waveforms -. - Shin-ichi Wada; Koichiro Sawa (IEICE Trans. Electron., 2016)

Commutation Phenomena and Brush Wear of DC Motor at High Speed Rotation. - Masayuki Isato; Koichiro Sawa; Takahiro Ueno (IEICE Trans. Electron., 2017)

A Method for Evaluating Degradation Phenomenon of Electrical Contacts Using a Micro-Sliding Mechanism - Minimal Sliding Amplitudes against Input Waveforms (2) -. - Shin-ichi Wada; Koichiro Sawa (IEICE Trans. Electron., 2017)

Technical Trends and International Standardization Activities in Electromagnetic Relays for Control Systems. - Takeshi Aoki; Kenjiro Hamada; Kiyoshi Yoshida; Koichiro Sawa (IEICE Trans. Electron., 2019)

A Study on Contact Voltage Waveform and Its Relation with Deterioration Process of AgPd Brush and Au-Plated Slip-Ring System with Lubricant. - Koichiro Sawa; Yoshitada Watanabe; Takahiro Ueno; Hirotasu Masubuchi (IEICE Trans. Electron., 2020)