Committee 
Date Time 
Place 
Paper Title / Authors 
Abstract 
Paper # 
EMD, WPT, EMCJ, PEM (Joint) 
20220715 15:25 
Tokyo 
(Primary: Onsite, Secondary: Online) 
Numerical analysis of airflow to affect on motion of break arcs ejected from surface of electrical contacts Koki Kameyama, Junya Sekikawa (Shizuoka Univ.) EMD20221 
[more] 
EMD20221 pp.16 
EMD, WPT, EMCJ, PEM (Joint) 
20220715 15:50 
Tokyo 
(Primary: Onsite, Secondary: Online) 
Voltagecurrent characteristics for each arc length of break arcs genelated in a 48VDC/600A regestive circuit Keiya Imori, Junya Sekikawa (Shizuoka Univ.) EMD20222 
[more] 
EMD20222 pp.712 
R, EMD 
20220210 15:35 
Online 
Online 
Investigation by numerical simulation of flow velocity of air blowing to electrical contact gap and its effect on break arcs Takashige Okuno, Junya Sekikawa (Shizuoka Univ.) R202145 EMD202113 
In the interruption of DC high voltage circuits, it is desirable to extinguish the arc at the opening of the contacts in... [more] 
R202145 EMD202113 pp.1217 
R, EMD 
20220210 16:00 
Online 
Online 
Break arcs magnetically blownout in a 48VDC/300A resistive circuit at constant opening speeds Haruko Yazaki, Junya Sekikawa (Shizuoka Univ.) R202146 EMD202114 
Dependences of arc length just before extinction L and contact gap at arc extinction d on contact opening speed v are st... [more] 
R202146 EMD202114 pp.1823 
EMD, R 
20210212 14:00 
Online 
Online 
Motion characteristics of break arcs generated in a 450VDC/10A circuit and surface temperature of arc runners Hiroyuki Sato, Junya Sekikawa (Shizuoka Univ.) R202035 EMD202026 
[more] 
R202035 EMD202026 pp.712 
EMD 
20201204 13:05 
Online 
Online 
Observation of arc discharges occurring between commutator and brush Simulating a DC motor by means of a highspeed camera Ryosuke Sano, Junya Sekikawa (Shizuoka Univ.) EMD202018 
Observed results of arc discharges generated between the brush and commutator are reported during arc duration. The arcs... [more] 
EMD202018 pp.16 
EMD 
20201204 13:30 
Online 
Online 
Dependence of arc duration and contact gap at arc extinction of break arcs occurring in a 48VDC/10A300A resistive circuit on contact opening speed Haruko Yazaki, Junya Sekikawa (Shizuoka Univ.) EMD202019 
[more] 
EMD202019 pp.712 
EMD 
20200717 14:35 
Hokkaido 
ChitoseArcadiaPlaza 
Dependence of Arc Length at Extinction of Break Arcs on circuit current for each silverbased contact material in 48VDC/50A300A Circuit Haruko Yazaki, Junya Sekikawa (Shizuoka Univ.) EMD20205 
[more] 
EMD20205 pp.1116 
EMD, R 
20200214 15:00 
Shizuoka 

Forcible division of break arcs in small space occurring in a 150V400VDC/10A resistive circuit by a dividing plate made of PTFE Yuichiro Kimura, Junya Sekikawa (Shizuoka Univ.) R201957 EMD201957 
[more] 
R201957 EMD201957 pp.1721 
EMD 
20191213 14:35 
Tokyo 

Dependence of arc length just before arc extinction on magnetic flux density when break arcs are blownout in a 48VDC/50A200A resistive circuit Kenshi Hamamoto, Junya Sekikawa (Shizuoka Univ.) EMD201943 
Break arcs were generated in a 48VDC resistive circuit and blownout by transverse magnetic field. Circuit current when ... [more] 
EMD201943 pp.16 
EMD 
20191213 15:40 
Tokyo 

Characteristics of break arcs blownout in a 500VDC/10A circuit when moving range of arc spots is changed by shape of insulated silver pipes Taiju Masuda, Junya Sekikawa (Sizuoka Univ.) EMD201945 
Break arcs are generated and magnetically blownout by transverse magnetic field in a 500VDC/10A resistive circuit. Silv... [more] 
EMD201945 pp.1318 
EMD 
20191213 16:05 
Tokyo 

Dependence of surface roughness on contact resistanceload characteristics and contact distance when contact force of silver electrical contacts is decreased after increasing Ryosuke Hosogi, Junya Sekikawa (Shizuoka Univ.) EMD201946 
In this study, in order to investigate in more detail contact resistanceload characteristics and contact distance on si... [more] 
EMD201946 pp.1924 
EMD 
20191115 13:55 
Tokyo 
The University of ElectroCommunications 
Characteristics of Break Arcs Magnetically BlownOut with simplified shape in a 200V500VDC/10A Resistive Circuit Yuta Kaneko, Junya Sekikawa (Shizuoka Univ.) EMD201941 
[more] 
EMD201941 pp.1116 
EMD 
20191115 14:20 
Tokyo 
The University of ElectroCommunications 
Forcible division of break arcs occurring in a 150V600VDC/10A resistive circuit by a dividing plate made of PTFE Yuichiro Kimura, Junya Sekikawa (Shizuoka Univ.) EMD201942 
[more] 
EMD201942 pp.1722 
EMCJ, EMD, WPT, PEM (Joint) [detail] 
20190719 09:05 
Tokyo 
KikaiShinkoKaikan Bldg. 
Forcible division of break arcs occurring in a 150V250VDC/10A resistive circuit by a dividing plate made of copper Yuichiro Kimura, Junya Sekikawa (Shizuoka Univ.) EMCJ201930 EMD201911 
[more] 
EMCJ201930 EMD201911 pp.15 
EMCJ, EMD, WPT, PEM (Joint) [detail] 
20190719 09:30 
Tokyo 
KikaiShinkoKaikan Bldg. 
Motion restriction of arc spots by insulated silver pipes for break arcs occurring in a 500VDC/10A circuit Taiju Masuda, Junya Sekikawa (Sizuoka Univ.) EMCJ201931 EMD201912 
[more] 
EMCJ201931 EMD201912 pp.712 
EMD 
20181109 13:35 
Tokyo 
The University of ElectroCommunications 
Analysis of Arc Length Just before Arc Extinction Generated in a 500VDC/10A Resistive Circuit by Means of Observation from Two Directions Ryuichiro Yamamura, Junya Sekikawa (Shizuoka Univ) EMD201841 
The experimental circuit is the resistive load resistor with supply voltage of 500 VDC/10A, and the material contacts i... [more] 
EMD201841 pp.15 
EMD 
20181109 14:00 
Tokyo 
The University of ElectroCommunications 
Analysis of Length of Break Arcs Magnetically Blownout just before Arc Extinction Occurring in a 48VDC/50200A Resistive Circuit Kenshi Hamamoto, Junya Sekikawa (Shizuoka Univ.) EMD201842 
Break arcs are generated in a 48VDC/50200A resistive circuit and blownout by transverse magnetic field. The magnetic f... [more] 
EMD201842 pp.712 
EMD 
20180518 15:30 
Hokkaido 
Muroran Institute of Technology 
Analysis of time evolution of length of break arcs occurring in a 48VDC/150A resistive circuit Kenshi Hamamoto, Junya Sekikawa (Shizuoka Univ.) EMD20186 
Silver electrical contacts are separated using a highspeed contact opening device to generate break arcs in a DC resist... [more] 
EMD20186 pp.2731 
EMD 
20180518 15:55 
Hokkaido 
Muroran Institute of Technology 
Arc length at arc extinction of break arcs when a 500VDC/10A High Voltage resistive circuit is interrupted Yuta Kaneko, Junya Sekikawa (Shizuoka Univ.) EMD20187 
[more] 
EMD20187 pp.3337 