Junya SEKIKAWA


Arc Duration and Dwell Time of Break Arcs Magnetically Blown-out in Nitrogen or Air in a 450VDC/10A Resistive Circuit
Akinori ISHIHARA Junya SEKIKAWA 
Publication:   
Publication Date: 2018/09/01
Vol. E101-C  No. 9  pp. 699-702
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
electrical contactelectromagnetic relaypermanent magnethigh speed camera
 Summary | Full Text:PDF(734.3KB)

Effect of Magnetic Blow-Out and Air Flow on Break Arcs Occurring between Silver Electrical Contacts with Copper Runners
Haruki MIYAGAWA Junya SEKIKAWA 
Publication:   
Publication Date: 2017/09/01
Vol. E100-C  No. 9  pp. 709-715
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices)
Category: 
Keyword: 
electrical contactselectromagnetic relayhigh-speed cameraarc spots
 Summary | Full Text:PDF(1.9MB)

Analysis of Rotational Motion of Break Arcs Rotated by Radial Magnetic Field in a 48VDC Resistive Circuit
Jun MATSUOKA Junya SEKIKAWA 
Publication:   
Publication Date: 2017/09/01
Vol. E100-C  No. 9  pp. 732-735
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
arc dischargecontact erosionhigh-speed camera
 Summary | Full Text:PDF(705.4KB)

Restriction on Motion of Break Arcs Magnetically Blown-Out by Surrounding Walls in a 450VDC/10A Resistive Circuit
Keisuke KATO Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/09/01
Vol. E99-C  No. 9  pp. 1009-1015
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices)
Category: 
Keyword: 
electromagnetic relaypermanent magnethigh speed cameraarc extinction
 Summary | Full Text:PDF(3.5MB)

FOREWORD
Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/09/01
Vol. E99-C  No. 9  pp. 984-984
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(67.7KB)

Observation of Break Arc Rotated by Radial Magnetic Field in a 48VDC Resistive Circuit Using Two High-Speed Cameras
Jun MATSUOKA Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/09/01
Vol. E99-C  No. 9  pp. 1027-1030
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
arc dischargecontact erosionhigh-speed camera
 Summary | Full Text:PDF(1MB)

Occurrence of Reignitions of Break Arcs When Moving Range of Arc Spots are Restricted within the Contact Surfaces
Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/09/01
Vol. E99-C  No. 9  pp. 992-998
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices)
Category: 
Keyword: 
arc dischargeelectric contactshigh speed camera
 Summary | Full Text:PDF(1.9MB)

Motion of Break Arcs Occurring between Silver Electrical Contacts with Copper Arc Runners
Haruki MIYAGAWA Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/09/01
Vol. E98-C  No. 9  pp. 919-922
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
electrical contactselectromagnetic relayhigh-speed cameracontacts opening apparatus
 Summary | Full Text:PDF(2.1MB)

Influence of Contact Material Vapor on Thermodynamic and Transport Properties of Arc Plasmas Occurring between Ag and Ag/SnO2 contact pairs
Takuya HARA Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/09/01
Vol. E97-C  No. 9  pp. 863-866
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
arc plasmacontact material vaporlocal thermodynamic equilibriumelectrical contacts
 Summary | Full Text:PDF(162KB)

Real Time Spectroscopic Observation of Contact Surfaces Being Eroded by Break Arcs
Masato NAKAMURA Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/06/01
Vol. E97-C  No. 6  pp. 592-598
Type of Manuscript:  PAPER
Category: Electromechanical Devices and Components
Keyword: 
break arccontact erosionelectrical contactshigh-speed camera48V
 Summary | Full Text:PDF(4.8MB)

Contact Resistance Distribution on Anode Surfaces Eroded by Break Arcs in a DC48V Resistive Circuit
Junya SEKIKAWA Katsuyoshi MIYAJI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/09/01
Vol. E96-C  No. 9  pp. 1142-1147
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: 
relayelectrical contactscontact erosionmetallic arc
 Summary | Full Text:PDF(4MB)

Arc Length of Break Arcs Magnetically Blown-Out at Arc Extinction in a DC450V/10A Resistive Circuit
Hitoshi ONO Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/09/01
Vol. E96-C  No. 9  pp. 1132-1137
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: 
arc dischargepermanent magnetexternal magnetic fieldelectrical contact
 Summary | Full Text:PDF(3.2MB)

Positions of Arc Spots of Break Arcs Occurring between Carbon Contacts When Transverse Magnetic Field Is Applied
Tomoaki SASAKI Junya SEKIKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/09/01
Vol. E96-C  No. 9  pp. 1138-1141
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
break arcmagnetexternal magnetic fieldelectrical contactscarbon
 Summary | Full Text:PDF(970.6KB)

Position and Shape of Break Arcs Driven by Transverse Magnetic Field
Tomoaki SASAKI Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/09/01
Vol. E95-C  No. 9  pp. 1527-1530
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
break arcmagnetexternal magnetic field48 Velectrical contact
 Summary | Full Text:PDF(850.3KB)

Arc Duration of Break Arcs Magnetically Blown-Out in a DC 450 V Resistive Circuit
Hitoshi ONO Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/09/01
Vol. E95-C  No. 9  pp. 1515-1521
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: 
arc dischargepermanent magnetelectrical contacttransverse magnetic fieldhigh-speed camera
 Summary | Full Text:PDF(1.1MB)

Effects of Shapes of Contact Surfaces on Break Arcs Occurring between Electrical Contacts in Which a Magnet is Embedded
Naoya TAKESHITA Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/09/01
Vol. E95-C  No. 9  pp. 1522-1526
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: 
electrical contactsrelaycontact erosionpermanent magnethigh-speed camera
 Summary | Full Text:PDF(959.8KB)

Break Arcs Driven by Transverse Magnetic Field in a DC48 V/6-24 A Resistive Circuit
Toru SUGIURA Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/09/01
Vol. E94-C  No. 9  pp. 1381-1387
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: 
break arcsexternal magnetic fieldseparating speedarc duration
 Summary | Full Text:PDF(1.7MB)

Arc Duration and Rotational Frequency of Break Arcs Driven by Radial Magnet Field in a DC42 V Resistive Circuit
Naoya TAKESHITA Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/09/01
Vol. E94-C  No. 9  pp. 1388-1394
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: 
electrical contactsrelaycontact erosionpermanent magnethigh-speed camera
 Summary | Full Text:PDF(1.5MB)

Characteristics of Break Arcs Driven by Transverse Magnetic Field in a DC High-Voltage Resistive Circuit
Tomohiro ATSUMI Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/09/01
Vol. E93-C  No. 9  pp. 1393-1398
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (Selected Papers from IS-EMD2009))
Category: 
Keyword: 
break arcelectrical contactmagnethigh-speed camera
 Summary | Full Text:PDF(487.5KB)

Effect of Contact Materials of Ag/SnO2 and Ag/ZnO on Rotational Motion of Break Arcs Driven by Radial Magnetic Field
Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/09/01
Vol. E93-C  No. 9  pp. 1387-1392
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (Selected Papers from IS-EMD2009))
Category: 
Keyword: 
break arcpermanent magnetarc dischargeelectrical contacts
 Summary | Full Text:PDF(1.6MB)

Rotational Motion of Break Arcs Driven by Radial Magnetic Field in a DC Resistive Circuit
Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/08/01
Vol. E92-C  No. 8  pp. 992-997
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2008))
Category: Arc Discharge & Contact Phenomena
Keyword: 
break arcmagnetic drivehigh-speed cameraelectrical contacts
 Summary | Full Text:PDF(918.3KB)

Motion of Break Arcs Driven by External Magnetic Field in a DC42 V Resistive Circuit
Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/08/01
Vol. E91-C  No. 8  pp. 1255-1260
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices(Selected Papers from IS-EMD2007))
Category: Arc Discharge & Related Phenomena
Keyword: 
arc dischargebreak archigh-speed cameramagnetelectrical contact
 Summary | Full Text:PDF(425.1KB)

Relationship between Arc Duration and Motion of Arc Spots for Break Arcs of Ag and Ag/ZnO Electrical Contacts
Junya SEKIKAWA Takumi SUGIO Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/08/01
Vol. E91-C  No. 8  pp. 1249-1254
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices(Selected Papers from IS-EMD2007))
Category: Arc Discharge & Related Phenomena
Keyword: 
arc dischargeelectrical contactbreak archigh-speed cameraAg/ZnO
 Summary | Full Text:PDF(459.4KB)

Time-Resolved Spectroscopic Temperature Measurement of Break Arcs in a D.C.42 V Resistive Circuit
Junya SEKIKAWA Naoki MORIYAMA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/08/01
Vol. E91-C  No. 8  pp. 1268-1272
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices(Selected Papers from IS-EMD2007))
Category: Arc Discharge & Related Phenomena
Keyword: 
break arcarc temperaturespectroscopic measurementspectral intensity
 Summary | Full Text:PDF(560.5KB)

Dependence of Motion of Breaking Arc on Contact Separating Speed for Ag and Pd Contact Pairs in a DC42V Resistive Circuit
Yoshinobu NAKAMURA Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/07/01
Vol. E90-C  No. 7  pp. 1361-1368
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006))
Category: Arc Discharge & Related Phenomena
Keyword: 
electrical contactarc spotbreaking arcseparating speedhigh-speed video camera
 Summary | Full Text:PDF(1013.6KB)

Spectroscopic Temperature Measurement of Breaking Arcs Near Cathode and Anode Surfaces of Copper Contacts
Naoki MORIYAMA Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/08/01
Vol. E89-C  No. 8  pp. 1141-1146
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from IS-EMD2005))
Category: Arc Discharge & Related Phenomena
Keyword: 
breaking arcarc temperaturespectral intensityBoltzmann plot
 Summary | Full Text:PDF(633KB)

Optical Observation of Arc Discharges between Electrical Contacts Breaking at Low Speed in DC42 V Resistive Circuit
Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/08/01
Vol. E89-C  No. 8  pp. 1147-1152
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from IS-EMD2005))
Category: Arc Discharge & Related Phenomena
Keyword: 
arc dischargeelectrical contactbreaking archigh-speed cameracurrent density
 Summary | Full Text:PDF(865.1KB)

An Experimental Equation for Dependence of Duration of Breaking Arcs on Supply Voltage with Constant Circuit Resistance
Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/08/01
Vol. E88-C  No. 8  pp. 1584-1589
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: Arc Discharge & Related Phenomena
Keyword: 
electrical contactarc dischargebreaking arcarc durationexperimental equation
 Summary | Full Text:PDF(968.7KB)

Observations of the Eroded Surfaces and the Motion of Arc Spots at Each Breaking Operation of Silver Electrical Contacts
Junya SEKIKAWA Tetsuya KITAJIMA Takayoshi ENDO Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/08/01
Vol. E88-C  No. 8  pp. 1590-1595
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: Arc Discharge & Related Phenomena
Keyword: 
arc dischargeelectrical contactbreaking archigh-speed cameramicroscope
 Summary | Full Text:PDF(1.7MB)

Observation of Pips Formed on Ag/SnO2 Contacts in DC14 V-21 A Resistive Circuit
Yutaka NAITO Tomoya ITO Ryo YAMAZAKI Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/08/01
Vol. E88-C  No. 8  pp. 1664-1669
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: 
Ag/SnO212 wt%electrical contactstransferred pippip shapesticking
 Summary | Full Text:PDF(1.9MB)

Growth of Transferred Pip and Electrical Properties of AgCdO Make-Only Contacts in Resistive Circuit with DC 14 V and 42 V Power Supply
Tomoya ITO Ryo YAMAZAKI Yutaka NAITO Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/08/01
Vol. E88-C  No. 8  pp. 1670-1674
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: 
electrical contactstransferred piparc discharge
 Summary | Full Text:PDF(2MB)

Cathode and Anode Bright-Spot Behaviors of Breaking Arc between Electrical Contacts with Low Separating Speed
Takayoshi ENDO Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/08/01
Vol. E88-C  No. 8  pp. 1596-1602
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: Arc Discharge & Related Phenomena
Keyword: 
arc dischargebright spotelectrical contactbreaking archigh-speed camera
 Summary | Full Text:PDF(2.4MB)

Observation of Breaking Arcs of Ag or Cu Electrical Contact Pairs with a High-Speed Camera
Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/08/01
Vol. E87-C  No. 8  pp. 1342-1347
Type of Manuscript:  Special Section PAPER (Special Section on IS-EMD2003--Recent Technical Trend of Electro-Mechanical Devices)
Category: Arc Discharge
Keyword: 
arc dischargeelectrical contactbreaking archigh-speed camera
 Summary | Full Text:PDF(1.9MB)

Research on Cathode Root Properties in Carbon Vacuum Arc
Daisuke SAKAI Yoshiharu SAITO Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/08/01
Vol. E87-C  No. 8  pp. 1356-1360
Type of Manuscript:  Special Section PAPER (Special Section on IS-EMD2003--Recent Technical Trend of Electro-Mechanical Devices)
Category: Arc Discharge
Keyword: 
vacuum arc dischargecathode arc rootgraphite electrodeevaporation rate
 Summary | Full Text:PDF(817.3KB)

Temperature Measurements of Breaking Arc between Copper Contacts at Three Constant Speeds (10, 20 and 30 mm/s)
Tetsuya KITAJIMA Junya SEKIKAWA Mitsuru TAKEUCHI Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/08/01
Vol. E87-C  No. 8  pp. 1361-1366
Type of Manuscript:  Special Section PAPER (Special Section on IS-EMD2003--Recent Technical Trend of Electro-Mechanical Devices)
Category: Arc Discharge
Keyword: 
breaking arcspectrum intensityarc temperatureopening speedarc durationgap length
 Summary | Full Text:PDF(1.1MB)

An Experimental Equation of V-I Characteristics of Breaking Arc for Ag, Au, Cu and Ni Electrical Contacts
Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/06/01
Vol. E86-C  No. 6  pp. 926-931
Type of Manuscript:  Special Section PAPER (Special Issue on Recent Development of Electro-Mechanical Devices (IS-EMD 2002))
Category: Discharges & Related Phenomena
Keyword: 
arc dischargeV-I characteristicsexperimental equationbreaking arc
 Summary | Full Text:PDF(1.1MB)

Relationship between Growth of Transferred Pip and Arc Duration at Electrical Contacts Mounted on Relays
Takatsugu NAKAYAMA Junya SEKIKAWA Takayoshi KUBONO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/06/01
Vol. E86-C  No. 6  pp. 939-944
Type of Manuscript:  Special Section PAPER (Special Issue on Recent Development of Electro-Mechanical Devices (IS-EMD 2002))
Category: Discharges & Related Phenomena
Keyword: 
electrical contactstransferred pipbouncesarc dischargerelays
 Summary | Full Text:PDF(939.7KB)