IEICE Trans

Koichiro SAWA

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
Publication: Publication Date: 2020/12/01 Vol. E103-C No. 12 pp. 705-712 Type of Manuscript: Special Section PAPER (Special Issue on Recent Development of Electro-Mechanical Devices) Category: Keyword: slip ring, Au plating, lubricant, contact voltage waveform, fluctuation, tunnel effect, rotation speed,
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Technical Trends and International Standardization Activities in Electromagnetic Relays for Control Systems Takeshi AOKI Kenjiro HAMADA Kiyoshi YOSHIDA Koichiro SAWA
Publication: Publication Date: 2019/09/01 Vol. E102-C No. 9 pp. 628-635 Type of Manuscript: INVITED PAPER (Special Section on Recent Development of Electro-Mechanical Devices) Category: Keyword: electromagnetic relays, contact failures, IEC/TC94, JIS C,
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Commutation Phenomena and Brush Wear of DC Motor at High Speed Rotation Masayuki ISATO Koichiro SAWA Takahiro UENO
Publication: Publication Date: 2017/09/01 Vol. E100-C No. 9 pp. 716-722 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices) Category: Keyword: arc, carbon, erosion, commutation, DC motor,
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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
Publication: Publication Date: 2017/09/01 Vol. E100-C No. 9 pp. 723-731 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices) Category: Keyword: electrical contact, micro-sliding mechanism, frictional force, minimal sliding amplitude, input waveform, rising or falling time, wear,
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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
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2016/09/01 Vol. E99-C No. 9 pp. 999-1008 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices) Category: Keyword: electrical contact, micro-sliding mechanism, frictional force, minimal sliding amplitude, input, output,
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Fundamental Characteristics of Arc Extinction at DC Low Current Interruption with High Voltage (<500V) Koichiro SAWA Masatoshi TSURUOKA Makito MORII
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2016/09/01 Vol. E99-C No. 9 pp. 1016-1022 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices) Category: Keyword: switch for appliances, DC interruption arc discharge, arc length, arc duration,
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Evaluation of Basic Dynamical Parameters in Printed Circuit Board — Mass, Force, and Acceleration — Shin-ichi WADA Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2013/09/01 Vol. E96-C No. 9 pp. 1165-1172 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices — Papers selected from International Session on Electro-Mechanical Devices 2012 (IS-EMD2012) and other recent research results —) Category: Keyword: electrical contact, micro-oscillation, fretting, mass, force, acceleration,
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Influence of Arc Discharge on Contact Resistance of AgNi Contacts for Electromagnetic Contactors Kiyoshi YOSHIDA Koichiro SAWA Kenji SUZUKI Masaaki WATANABE
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2012/09/01 Vol. E95-C No. 9 pp. 1531-1534 Type of Manuscript: BRIEF PAPER Category: Keyword: contact resistance, arc duration, make arc, break arc, electromagnetic contactor,
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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
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2012/09/01 Vol. E95-C No. 9 pp. 1465-1472 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices - Papers selected from International Session on Electro-Mechanical Devices 2011 (IS-EMD2011) and other recent research results -) Category: Keyword: slip ring, Au plating, Ni base plating, Ag-Pd brush, lifetime, lubricant,
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Influence of Voltage on Arc Characteristics and Electrode Mass Change of AgNi Contacts for Electromagnetic Contactors Kiyoshi YOSHIDA Koichiro SAWA Kenji SUZUKI Masaaki WATANABE
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2011/09/01 Vol. E94-C No. 9 pp. 1395-1401 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices – Papers selected from International Session on Electro-Mechanical Devices (IS-EMD2010) and other research results –) Category: Keyword: electromagnetic contactor, electrical contact, arc duration, AgNi contact, arc energy, electrode mass change,
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A Study on Wear of Brush and Carbon Flat Commutator of DC Motor for Automotive Fuel Pump Koichiro SAWA Takahiro UENO Hidenori TANAKA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2010/09/01 Vol. E93-C No. 9 pp. 1443-1448 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (Selected Papers from IS-EMD2009)) Category: Keyword: DC motor, flat commutator, brush, commutation arc, wear model,
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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
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/08/01 Vol. E90-C No. 8 pp. 1634-1642 Type of Manuscript: PAPER Category: Electromechanical Devices and Components Keyword: carbon brush, starter, lead, wear, tribology,
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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
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/07/01 Vol. E90-C No. 7 pp. 1421-1428 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006)) Category: Contact Phenomena Keyword: YBCO, persistent current switch, contact resistance, metal deposition, finite element method,
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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
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2007/07/01 Vol. E90-C No. 7 pp. 1497-1503 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006)) Category: Signal Transmission & Sensing Keyword: proximity sensor, eddy-current loss, magnetic circuit, numerical analysis, plastic magnetic material,
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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
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/08/01 Vol. E88-C No. 8 pp. 1696-1703 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices--Selected Papers from International Session on Electro-Mechanical Devices 2004 (IS-EMD2004)--) Category: Sensing Devices Keyword: proximity sensor, eddy current loss, magnetic circuit, numerical analysis, finite element method,
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Fabrication Process of Nonarcing Power MEMS Switch Yu YONEZAWA Noboru WAKATSUKI Yoshio SATOH Tadashi NAKATANI Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/08/01 Vol. E88-C No. 8 pp. 1629-1634 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices--Selected Papers from International Session on Electro-Mechanical Devices 2004 (IS-EMD2004)--) Category: Relays and Switches Keyword: arc discharge, MEMS, arc suppression, contact device, cantilever,
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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
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2005/08/01 Vol. E88-C No. 8 pp. 1675-1681 Type of Manuscript: Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices--Selected Papers from International Session on Electro-Mechanical Devices 2004 (IS-EMD2004)--) Category: Automotive Application Keyword: carbon brush, lead free, starter, wear, corrosion,
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Characteristics of Flat Commutator on DC Motor for Automotive Fuel Pump Takashi SHIGEMORI Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2004/08/01 Vol. E87-C No. 8 pp. 1255-1260 Type of Manuscript: Special Section PAPER (Special Section on IS-EMD2003--Recent Technical Trend of Electro-Mechanical Devices) Category: New Technology and Automotive Applications Keyword: commutation, arc, loss, gasoline, flat commutator,
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FOREWORD Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2004/08/01 Vol. E87-C No. 8 pp. 1217-1217 Type of Manuscript: FOREWORD Category: Keyword:
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A Proposal of a New Evaluation Scheme of Pips and Craters Formed by Arc Discharges on Electrical Contact Surfaces Makoto HASEGAWA Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2004/08/01 Vol. E87-C No. 8 pp. 1277-1280 Type of Manuscript: Special Section LETTER (Special Section on IS-EMD2003--Recent Technical Trend of Electro-Mechanical Devices) Category: Keyword: electrical contact, arc discharge, erosion, material transfer, laser microscope,
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Application of a Digital Scanning Laser Microscope to 3-D Analysis of Contact Surface Damages Makoto HASEGAWA Jiro MAKIMOTO Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/06/01 Vol. E86-C No. 6 pp. 932-938 Type of Manuscript: Special Section PAPER (Special Issue on Recent Development of Electro-Mechanical Devices (IS-EMD 2002)) Category: Discharges & Related Phenomena Keyword: electrical contacts, erosion, material transfer, scanning laser microscope,
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Effect of Inert Gas on Surface Film Formation and on Voltage Drop of Sliding Contacts Takahiro UENO Noboru MORITA Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/06/01 Vol. E86-C No. 6 pp. 891-896 Type of Manuscript: Special Section PAPER (Special Issue on Recent Development of Electro-Mechanical Devices (IS-EMD 2002)) Category: Contact Phenomena Keyword: sliding contact, contact voltage drop, gas adsorption, surface film, brush,
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Effect of Atmosphere Change on Contact Voltage Drop at Sliding Contact Takahiro UENO Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2002/07/01 Vol. E85-C No. 7 pp. 1478-1485 Type of Manuscript: PAPER Category: Electromechanical Devices and Components Keyword: oxide film, contact voltage drop, low atmospheric pressure, physical adsorption,
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Experimental Results on Operating Characteristics of Ag, Pd and Cu Contacts in Nitrogen Atmosphere Makoto HASEGAWA Jiro MAKIMOTO Naoki MINOURA Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2000/09/25 Vol. E83-C No. 9 pp. 1385-1394 Type of Manuscript: Special Section PAPER (Special Issue on Current Electromechanical Devices and Their Materials with Recent Innovations) Category: Keyword: contact resistance, arc, nitrogen atmosphere,
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Recent Researches and New Trends of Electrical Contacts Koichiro SAWA Makoto HASEGAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2000/09/25 Vol. E83-C No. 9 pp. 1363-1376 Type of Manuscript: INVITED PAPER (Special Issue on Current Electromechanical Devices and Their Materials with Recent Innovations) Category: Keyword: electrical contacts, contact resistance, arc discharges,
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An Influence of Atmospheric Humidity and Temperature on Brush Wear of Sliding Contact Takahiro UENO Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2000/09/25 Vol. E83-C No. 9 pp. 1395-1401 Type of Manuscript: Special Section PAPER (Special Issue on Current Electromechanical Devices and Their Materials with Recent Innovations) Category: Keyword: surface film, brush wear, contact voltage drop, lubrication,
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A Plausible Mechanism for Electromagnetic Interference in the Arc Transition Zhuan-Ke CHEN Toshiro HAYAKAWA Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1998/03/25 Vol. E81-C No. 3 pp. 435-438 Type of Manuscript: Special Section LETTER (Special Issue on Electromechanical Devices and their Surface Science) Category: Keyword: EMI, steady arc, arc voltage fluctuation, ionization energy,
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Arc and Contact Resistance Characteristics of Ag and Pd Contacts in Dielectric Liquids Toshiro HAYAKAWA Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1998/03/25 Vol. E81-C No. 3 pp. 392-398 Type of Manuscript: Special Section PAPER (Special Issue on Electromechanical Devices and their Surface Science) Category: Keyword: arc discharge, contact resistance, Ag and Pd contacts, dielectric liquid,
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FOREWORD Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1997/02/25 Vol. E80-C No. 2 pp. 197-197 Type of Manuscript: FOREWORD Category: Keyword:
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Arc Discharge at Electrical Contacts Koichiro SAWA Zhuan-Ke CHEN
Publication: IEICE TRANSACTIONS on Communications Publication Date: 1996/04/25 Vol. E79-B No. 4 pp. 439-446 Type of Manuscript: INVITED PAPER (Special Issue on Discharge and Electromagnetic Interference) Category: Keyword: arc discharge, electrical contact, radio noise, EMI, spectroscopic measurement,
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FOREWORD Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1994/10/25 Vol. E77-C No. 10 pp. 1535-1535 Type of Manuscript: FOREWORD Category: Keyword:
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An Experimental Study on Material Transfer and Arc Erosion Characteristic of Ag Contacts under Switching Lower Current Hiroaki MIZUKOSHI Koichiro SAWA Makoto HASEGAWA Kae NIIZUMA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1994/10/25 Vol. E77-C No. 10 pp. 1655-1661 Type of Manuscript: Special Section PAPER (Special Issue on Recent Electromechanical Devices) Category: Arcing Discharge and Contact Characteristics Keyword: material transfer, minimum arc current, arc discharge, organic gas, molten bridge, bounce, Ag contacts,
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The Influence of Oxygen Concentration on Contact Resistance Behaviours of Ag and Pd Materials in DC Breaking Arcs Zhuan-Ke CHEN Keisuke ARAI Koichiro SAWA
Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1994/10/25 Vol. E77-C No. 10 pp. 1647-1654 Type of Manuscript: Special Section PAPER (Special Issue on Recent Electromechanical Devices) Category: Arcing Discharge and Contact Characteristics Keyword: contact resistance, oxygen effect, arc erosion, Ag and Pd contacts, oxide films,
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Influence of Steady arc Duration on Contact Resistance Characteristics of Ag-Pd30% Contacts Makoto HASEGAWA Koichiro SAWA
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1990/11/25 Vol. E73-E No. 11 pp. 1846-1848 Type of Manuscript: Special Section LETTER (Special Issue on 1990 Autumn Natl. Conv. IEICE) Category: Electromechanical Components Keyword:
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Influence of Contact Materials on the Formation of Palladium-Oxides by Mechanochemical Reaction Makoto HASEGAWA Koichiro SAWA
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1990/04/25 Vol. E73-E No. 4 pp. 496-498 Type of Manuscript: Special Section LETTER (Special Issue on 1990 Spring National Convention IEICE) Category: Electromechanical Components Keyword:
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A Study of the Formation of Palladium-Oxides Caused by Mechanical Switching Actions Makoto HASEGAWA Koichiro SAWA Kunio MIYACHI
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1989/04/25 Vol. E72-E No. 4 pp. 296-298 Type of Manuscript: Special Section LETTER (Special Issue on 1989 Spring National Convention IEICE) Category: Components and Materials Keyword:
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Analysis of Steady Arc Products on Ag/Pd Contacts Makoto HASEGAWA Koichiro SAWA Kunio MIYACHI
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1988/04/25 Vol. E71-E No. 4 pp. 276-277 Type of Manuscript: Special Section LETTER (Special Issue: Papers from 1988 Spring Convention IEICE) Category: Components and Materials Keyword:
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A Study on Contact Characteristics of Ag-Pd Alloy Contacts by using Automatic Data-Acquisition System for Contact Resistance Koichiro SAWA Makoto HASEGAWA Kunio MIYACHI
Publication: IEICE TRANSACTIONS (1976-1990) Publication Date: 1986/04/25 Vol. E69-E No. 4 pp. 461-463 Type of Manuscript: Special Section LETTER (Special Issue: Papers from 1986 National Convention IECE Japan) Category: Components Keyword:
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