2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM)最新文献_第3页

Impact of Impedance Change Caused by Bonding Wire Connection on Signal Transmission 键合线连接引起的阻抗变化对信号传输的影响

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307856

Ziren Wang, G. Flowers, Jinchun Gao, Zekun Wang, Kaixuan Song

引用次数: 0

3D Simulation of Electric Arcing and Pressure increase in an Automotive HVDC Relay During a Short Circuit Situation 汽车直流继电器短路时电弧和压力升高的三维仿真

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307918

Crispin Masahudu Ewuntomah, J. Oberrath

引用次数: 1

Kalman Filter for Detecting Serial Arc Faults in a Domestic Electrical Network 卡尔曼滤波在家用电网串联电弧故障检测中的应用

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307878

E. Calderon, Schweitzer Patrick, Weber Serge

引用次数: 0

Analysis of Fretting Behavior of Silver and Gold Flashed Palladium-nickel Dissimilar Coatings for Connectors 连接器用银、金闪蒸钯镍异种镀层的微动性能分析

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307847

A. Torrealba, S. Noël, A. Brézard‐Oudot, A. Karam, D. Comte, J. Toran

{"title":"Analysis of Fretting Behavior of Silver and Gold Flashed Palladium-nickel Dissimilar Coatings for Connectors","authors":"A. Torrealba, S. Noël, A. Brézard‐Oudot, A. Karam, D. Comte, J. Toran","doi":"10.1109/HLM49214.2020.9307847","DOIUrl":"https://doi.org/10.1109/HLM49214.2020.9307847","url":null,"abstract":"It is well known that good wear performance can be obtained with Au-flashed palladium-nickel sphere on flat contacts simulating various connector applications. It has also been shown that these good wear properties could be recorded for asymmetrical coatings such as a noble metal sphere on Au-flashed palladium-nickel. In this paper we investigate the fretting properties of such asymmetrical coatings particularly of Ag versus Au flashed PdNi. The contacts are submitted to severe fretting wear by applying imposed sine displacements of amplitude similar to the Hertz contact radius. The contact resistance, the friction force and wear evolutions were analyzed and correlated to 3D profilometry measurements allowing wear volumes quantification and EDS elemental identification of the wear tracks.Very different behaviors are observed whether the silver coating is on the sphere or on the plane though in both case the embedding of the oxidized wear debris by silver improves the fretting behavior. The transfer of silver from the sphere contact onto the palladium nickel flat is seen to be beneficial to the electrical stability of the interface for a long time, leading to more stable results than even silver/silver contacts. Nevertheless an unusual phenomenon of the galling type is observed for which more investigations are needed.","PeriodicalId":268345,"journal":{"name":"2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133752992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study on the Adhesion Characteristics for AgSnO2 Contacts of a Relay 继电器中AgSnO2触点粘附特性的实验研究

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307926

Zhaobin Wang, Zhen Li, Kangning Chen, Zhan Wang, Shang Shang

{"title":"Experimental Study on the Adhesion Characteristics for AgSnO2 Contacts of a Relay","authors":"Zhaobin Wang, Zhen Li, Kangning Chen, Zhan Wang, Shang Shang","doi":"10.1109/HLM49214.2020.9307926","DOIUrl":"https://doi.org/10.1109/HLM49214.2020.9307926","url":null,"abstract":"In order to evaluate the electrical contact performances of contact materials in relays, a new type of electrical contact simulation test system was designed and developed, in which contact materials of dynamic and static contacts can easily be replaced. The electrical contact characteristics of AgSnO2 with regard to the physical phenomenon of material surface adhesion was analyzed. Contact adhesion is divided into cold adhesion and hot adhesion. Cold adhesion occurs under the condition that no current passes the contact pair. This article mainly studies the hot adhesion phenomenon under the condition of resistive load current. The failure process of the contact pair due to dynamic welding of the contact during the experiment was analyzed. Firstly, the experimental process of hot adhesion was researched through the testing system, and then the relationship between the adhesion force and the contact resistance under adhesion condition is analyzed theoretically. Secondly, observing the microscopic morphology of the contact surface, and experimental data of other electrical performance degradation parameters in the experiment, the physical degradation mechanism of the adhesion characteristics was analyzed. Finally, the influencing factors of adhesion characteristics were explored through experiments, and the relationship between contact force, load conditions and adhesion characteristics were discussed.","PeriodicalId":268345,"journal":{"name":"2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130929305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of the Ball Grid Array Connection Failures on Signal Integrity 球栅阵列连接故障对信号完整性的影响

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307912

Kaixuan Song, Jinchun Gao, G. Flowers, Ziren Wang, Qingya Li, W. Yi

{"title":"Impact of the Ball Grid Array Connection Failures on Signal Integrity","authors":"Kaixuan Song, Jinchun Gao, G. Flowers, Ziren Wang, Qingya Li, W. Yi","doi":"10.1109/HLM49214.2020.9307912","DOIUrl":"https://doi.org/10.1109/HLM49214.2020.9307912","url":null,"abstract":"Ball grid arrays (BGA) are widely used in micro assemblies to provide both the mechanical connection between the chip substrate and the circuit board, and the electrical connection between the chip circuit and the peripheral matching circuit. Connection failures of a ball grid array may result in deterioration of signal integrity and low communication quality. In the present work, the impact of a degraded ball grid array connection on high-frequency characteristics was studied. A 3-D electromagnetic field model and an equivalent circuit model of a degraded ball grid array were developed. The electrical performance of the degraded ball grid array was analyzed and simulated. It was found that the 3-D electromagnetic field model results were in good agreements with the predicted behaviors from equivalent circuit model simulations. The characteristics of the ball grid array for different degradation levels were then compared and analyzed. This research serves to provide a better understanding of the effects of ball grid array deterioration on signal performance for application in fault detection strategies for electronic systems.","PeriodicalId":268345,"journal":{"name":"2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115323174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Design Considerations for Fast Mechanical Switches Using Piezoelectric Actuators 使用压电致动器的快速机械开关的设计注意事项

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307871

T. Damle, A. Munoz, Chunmeng Xu, L. Graber

引用次数: 1

HLM 2020 Foreword 峰会2020前言

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/hlm49214.2020.9307869

引用次数: 0

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/hlm49214.2020.9307892

引用次数: 0

Evaluation of Arc Erosion of Cu-graphite Brush Used in Small DC Motors with and without Quenching Device 小型直流电动机用铜石墨电刷的电弧腐蚀评价

2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM) Pub Date : 2020-09-30 DOI: 10.1109/HLM49214.2020.9307855

K. Sawa, T. Ueno, K. Nakano

{"title":"Evaluation of Arc Erosion of Cu-graphite Brush Used in Small DC Motors with and without Quenching Device","authors":"K. Sawa, T. Ueno, K. Nakano","doi":"10.1109/HLM49214.2020.9307855","DOIUrl":"https://doi.org/10.1109/HLM49214.2020.9307855","url":null,"abstract":"Many small DC motors are used for anti-lock breaking system (ABS) and other applications. It is well-known that in DC motors the commutation arc causes a high rate of erosion and wear of brush and commutator. Therefore, it is important how the commutation arc influences the erosion and wear of brush in small DC motors.The wear and erosion of brush is caused by both mechanical sliding action and arc discharge. To figure out the wear/erosion mechanism of brush, mechanical wear and arc erosion are needed to be separately evaluated. However, it is usually difficult, because arc dis charge causes not only arc erosion but also the increase of mechanical sliding wear as R. Holm said.In this study, a switching device is newly developed and arc erosion of brush material is investigated. The brush material is Cu-graphite which is generally used in small DC motors. In the test the Cu-graphite as a brush is cathode and Cu is anode as a commutator of DC motors, and fundamental characteristics of arc duration and arc energy are obtained. Furthermore, the effect of a spark quenching circuit with a Zener diode is examined. In both cases, the arc erosion is measured by a laser microscope and the arc erosion per unit energy is obtained. In addition brush wear/erosion obtained by a commutation test could be analyzed, using the above results.","PeriodicalId":268345,"journal":{"name":"2020 IEEE 66th Holm Conference on Electrical Contacts and Intensive Course (HLM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127512220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1