Guofu ZHAI


Simulation of Metal Droplet Sputtering and Molten Pool on Copper Contact under Electric Arc
Kai BO Xue ZHOU Guofu ZHAI Mo CHEN 
Publication:   
Publication Date: 2018/09/01
Vol. E101-C  No. 9  pp. 691-698
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices)
Category: 
Keyword: 
arc erosionmolten metal jetmolten poolhydrodynamics of molten metal
 Summary | Full Text:PDF(1.8MB)

Comparisons on Arc Behavior and Contact Performance between Cu and Cu-Mo Alloys in a Bridge-Type Contact System
Xue ZHOU Mo CHEN Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/09/01
Vol. E98-C  No. 9  pp. 904-911
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2014))
Category: 
Keyword: 
Cu-Mo alloyarc characteristicerosion characteristic
 Summary | Full Text:PDF(1.5MB)

Preliminary Study of Electrical Contact Behaviors of Au-plated Material at Super Low Making/Breaking Velocity
Wanbin REN Shengjun XUE Hongxu ZHI Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/04/01
Vol. E98-C  No. 4  pp. 364-370
Type of Manuscript:  PAPER
Category: Electromechanical Devices and Components
Keyword: 
electrical contactAu-plated materialcontact voltageadhesion forcesuper low velocity
 Summary | Full Text:PDF(4.4MB)

Research on Distributed Parameter Model of Permanent Magnet in Robust Design of Electromagnetic Relay
Huimin LIANG Jiaxin YOU Zhaowen CAI Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/12/01
Vol. E97-C  No. 12  pp. 1142-1149
Type of Manuscript:  PAPER
Category: Electronic Components
Keyword: 
magnetic field line based equivalent distributed parameter model (MFDPM)magnetic equivalent circuit method (MEC)analytical methodelectromagnetic relayreliability engineering
 Summary | Full Text:PDF(1.7MB)

Experimental Study on Root Profile of Molten Bridge under Different Current at Low Opening Speed
Xinyun ZHANG Xue ZHOU Xinglei CUI Rui LI Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/09/01
Vol. E97-C  No. 9  pp. 867-872
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2013))
Category: 
Keyword: 
bridgecontact forceseparation speedroot profileCu
 Summary | Full Text:PDF(2.9MB)

Experimental Investigation and Numerical Simulation on the Role of Sphere Indenter in Measuring Contact Resistance of Flat Rivets
Wanbin REN Yu CHEN Shengjun XUE Guenther HORN Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/09/01
Vol. E97-C  No. 9  pp. 873-879
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2013))
Category: 
Keyword: 
sphere indenterconstriction resistancecontact resistanceflat rivetFEM
 Summary | Full Text:PDF(4.6MB)

Study on Arc Characteristics of a DC Bridge-type Contact in Air and Nitrogen at Different Pressure
Xue ZHOU Mo CHEN Xinglei CUI Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/09/01
Vol. E97-C  No. 9  pp. 850-857
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2013))
Category: 
Keyword: 
bridge-type contactsdc arcscopper contactsarc behaviorsgas pressure
 Summary | Full Text:PDF(2MB)

Study on Arc Behaviors at Opening a 270V Resistive Circuit by Bridge-Type Contacts under Magnetic Field
Xue ZHOU Xinglei CUI Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/09/01
Vol. E96-C  No. 9  pp. 1124-1131
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: 
bridge-type contactsdc arcscopper contactsarc behaviors
 Summary | Full Text:PDF(3.4MB)

Effect of Axial and Transverse Magnetic Fields on the Arc Duration and Material Transfer
Guofu ZHAI Xinglei CUI Xue ZHOU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/03/01
Vol. E95-C  No. 3  pp. 395-400
Type of Manuscript:  PAPER
Category: Electromechanical Devices and Components
Keyword: 
axial magnetic fieldtransverse magnetic fieldmetallic phasegaseous phase
 Summary | Full Text:PDF(2.2MB)

Failure Process and Dynamic Reliability Estimation of Sealed Relay
Xuerong YE Jie DENG Qiong YU Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/09/01
Vol. E94-C  No. 9  pp. 1375-1380
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: 
sealed relayfailure processtime parametergap timedynamic reliability estimation
 Summary | Full Text:PDF(1.5MB)

The Discrimination of Contact Failure Mechanisms by Analyzing the Variations of Time Parameters for Relays
Shujuan WANG Qiong YU Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/09/01
Vol. E93-C  No. 9  pp. 1437-1442
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (Selected Papers from IS-EMD2009))
Category: 
Keyword: 
relaystime parameterslife testcontact failure mechanismcontact failure process
 Summary | Full Text:PDF(1.6MB)

Study on the Retrograde Motion of Arc under Transverse Magnetic Field
Guofu ZHAI Xinglei CUI Xue ZHOU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/09/01
Vol. E93-C  No. 9  pp. 1431-1436
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (Selected Papers from IS-EMD2009))
Category: 
Keyword: 
retrograde motiontransverse magnetic fieldinductive loadarc root distribution
 Summary | Full Text:PDF(1.4MB)

Research on Dynamic Characteristics Testing and Analyzing System of Electromagnetic Relay
Xuerong YE Huimin LIANG Jie DENG Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/08/01
Vol. E92-C  No. 8  pp. 1028-1033
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2008))
Category: Relacys & Switches
Keyword: 
electromagnetic relaydynamic characteristicCCD
 Summary | Full Text:PDF(666.4KB)

Study on Optimization of Electromagnetic Relay's Reaction Torque Characteristics Based on Adjusted Parameters
Guofu ZHAI Qiya WANG Wanbin REN 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2009/08/01
Vol. E92-C  No. 8  pp. 1023-1027
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electro-Mechanical Devices (IS-EMD2008))
Category: Relacys & Switches
Keyword: 
electromagnetic relayGAbreaking velocityadjusted parametersreaction torque characteristic
 Summary | Full Text:PDF(346.2KB)

3-D Finite Element Analysis of Dynamic Characteristics of Twin-Type Relay Interfered by Uniform Constant Magnetic Field
Guofu ZHAI Wenying YANG Xue ZHOU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/08/01
Vol. E91-C  No. 8  pp. 1215-1221
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices(Selected Papers from IS-EMD2007))
Category: Contact Phenomena
Keyword: 
twin-type relayuniform constant magnetic fieldfunctional moduleoperation timeelectromagnetic compatibility
 Summary | Full Text:PDF(349.2KB)

Study on Arc Generated by Opening Electromagnetic Relay Contacts in DC Low-Current Resistive Circuit with Constant Velocity
Guofu ZHAI Xue ZHOU 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2008/08/01
Vol. E91-C  No. 8  pp. 1233-1239
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: 
dynamic arclow currentMHD modelelectromagnetic relaystructured dynamic layering
 Summary | Full Text:PDF(449.7KB)

Modeling and Simulation of Hermetically Sealed Electromagnetic Relay under Mechanical Environment
Wanbin REN Yinghua CHEN Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/07/01
Vol. E90-C  No. 7  pp. 1448-1454
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from ICEC2006))
Category: Relays & Switches
Keyword: 
finite element modelingnormal mode analysisdynamics responseNastranhermetically sealed electromagnetic relay
 Summary | Full Text:PDF(628.2KB)

Contact Vibration Characteristic of Electromagnetic Relay
Wanbin REN Guofu ZHAI Li CUI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/08/01
Vol. E89-C  No. 8  pp. 1177-1181
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from IS-EMD2005))
Category: Relays & Switches
Keyword: 
electromagnetic relay (EMR)hertz contact theorynonlinearcontact rigidityfinite element method
 Summary | Full Text:PDF(562.8KB)

Method for Identification of Nonlinear Parameters and Its Application to Data Analysis for Aerospace Relay Reliability
Huimin LIANG Jingbo LIN Guofu ZHAI Wenlong WANG 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/08/01
Vol. E89-C  No. 8  pp. 1173-1176
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from IS-EMD2005))
Category: Relays & Switches
Keyword: 
contact moving timeover travel timeGauss-Newton methodMacalto methodnonlinear parameter identify
 Summary | Full Text:PDF(248.9KB)

Research on the Tolerance Distribution of Sealed Electromagnetic Relay with Reliability Index
Huimin LIANG Xuerong YE Guofu ZHAI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/08/01
Vol. E89-C  No. 8  pp. 1164-1172
Type of Manuscript:  Special Section PAPER (Special Section on Recent Development of Electromechanical Devices (Selected Papers from IS-EMD2005))
Category: Relays & Switches
Keyword: 
sealed electromagnetic relaytolerance distributiontolerance bandreliability
 Summary | Full Text:PDF(1.2MB)