2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)最新文献

Impact of Physical Dimensions and Dielectric Materials in Fuzz Button Interconnection Area on Signal Transmission 模糊按钮互连区物理尺寸和介质材料对信号传输的影响

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671142

Wenjia Wang, Jinchun Gao, G. Flowers, Ziren Wang, Junyu Luo, W. Yi

{"title":"Impact of Physical Dimensions and Dielectric Materials in Fuzz Button Interconnection Area on Signal Transmission","authors":"Wenjia Wang, Jinchun Gao, G. Flowers, Ziren Wang, Junyu Luo, W. Yi","doi":"10.1109/HLM51431.2021.9671142","DOIUrl":"https://doi.org/10.1109/HLM51431.2021.9671142","url":null,"abstract":"Fuzz buttons connectors are widely used in printed circuit board (PCB) vertical interconnection. They provide both mechanical support and electrical connection for the circuits. In order to reduce electromagnetic wave reflection at fuzz button connector transitions resulting from impedance discontinuity, suitable physical dimensions and dielectric material in interconnections area are needed. In this work, a Finite Integration Time Domain (FITD) model for the research objective composed of waveguide PCBs and fuzz-button connectors was developed, and its corresponding SPICE model and Finite Element Analysis (FEA) model were also presented. The FITD model results were consistent with the SPICE and FEA model results. Using the obtained FITD model, the influences of the change of physical sizes and material parameters of fuzz-button connector on circuit impedance were analyzed based on time domain reflectometry (TDR) and high frequency parameters. This research provides a better understanding of the effects of physical dimensions and dielectric materials of fuzz-button connector on signal transmission and guides engineers in the selection of the proper parameters to ensure interconnections with high signal integrity.","PeriodicalId":338653,"journal":{"name":"2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115374366","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

Comparison of Electrical Properties of CuCr30 Contacts Manufactured by Two Powder Metallurgy Technologies 两种粉末冶金工艺制备CuCr30触头电性能比较

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671098

Kaimiao Liu, Peng Li, Shisong Zhang, Xiaojun Wang, Gang Li, Xiaoyun Shi, Wenbin Wang

{"title":"Comparison of Electrical Properties of CuCr30 Contacts Manufactured by Two Powder Metallurgy Technologies","authors":"Kaimiao Liu, Peng Li, Shisong Zhang, Xiaojun Wang, Gang Li, Xiaoyun Shi, Wenbin Wang","doi":"10.1109/HLM51431.2021.9671098","DOIUrl":"https://doi.org/10.1109/HLM51431.2021.9671098","url":null,"abstract":"The powder metallurgy CuCr contacts has excellent anti-welding performance, thus it is often used in low contact pressure Vacuum Interrupters (VIs), which are typically used in VIs commercially made by Russia. Compared with the CuCr contact which is made by the arc melting or vacuum melting, the disadvantage of powder metallurgy CuCr contact is that its current breaking capacity is low. This research focused on an improvement of breaking capacity of CuCr30 contacts by using Spark Plasma Sintering (SPS) sintering process. The current breaking capacity and welding strength was compared with conventional powder metallurgy CuCr30 contacts. The experimental results showed that the SPS sintering process improved the electrical life. The conventional powder metallurgy processed CuCr30 contacts successfully interrupted short circuit current of …kA with 13 times, while the SPS process sintered CuCr30 contacts reached 19 times, even though it is still lower than that of the vacuum melting CuCr30 contacts (22 times) and the arc melting process contacts (23 times). The average welding force of the conventional powder metallurgy and SPS processes CuCr30 contact were 441.8N and 348.9N, respectively.","PeriodicalId":338653,"journal":{"name":"2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116089505","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

Simulation of Residual Current in Low Voltage DC Systems 低压直流系统中剩余电流的仿真

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671160

Jing Wang, Zhimin Xie, Silei Chen, Xingwen Li

{"title":"Simulation of Residual Current in Low Voltage DC Systems","authors":"Jing Wang, Zhimin Xie, Silei Chen, Xingwen Li","doi":"10.1109/HLM51431.2021.9671160","DOIUrl":"https://doi.org/10.1109/HLM51431.2021.9671160","url":null,"abstract":"With the development of new energy industry, low voltage DC system (LVDC) has been developed rapidly in the municipal and residential field. DC residual current has become a key problem threatening the safe and stable operation of low voltage DC system. In the DC system, the voltage fluctuation generated by the rectifier and the system circulating net currents generated by the line with different positive and negative parameters would interfere with the detection of residual current operated protective devices (RCD). In this paper, the effects of current on human beings was analyzed firstly. Then the impedance model of human body was built for different electric shock conditions. Meanwhile, the representative electric shock simulation models of TN, TT and IT systems were established. And the characteristics of residual current caused by direct and indirect electric shock in different grounding modes were researched. Next, the influence of system factors on circulating net currents and the detection of residual current was analyzed. On this basis, the configurations of RCD in DC system were proposed finally, protecting human body from electric shock and preventing electric fire accident threats.","PeriodicalId":338653,"journal":{"name":"2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129254151","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: 2

A Durable Electroplated Silver Contact Finish for Reusable Connectors 用于可重复使用连接器的耐用电镀银接触饰面

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671134

Young-Ho Yoon, Jamie Chen, Michael Lipschutz, Patricia Gumbley, Miguel Rodriguez, Kristen Griffin

引用次数: 0

[Title page] (标题页)

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/hlm51431.2021.9671201

引用次数: 0

Development and Validation of the Statistical Elastic and Elastic-plastic Rough Surface Contact Model for Small Contact to Complete Contact 小接触到完全接触的统计弹性和弹塑性粗糙表面接触模型的建立与验证

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671135

S. Saha, Yang Xu, Kyle Schulze, R. Jackson

{"title":"Development and Validation of the Statistical Elastic and Elastic-plastic Rough Surface Contact Model for Small Contact to Complete Contact","authors":"S. Saha, Yang Xu, Kyle Schulze, R. Jackson","doi":"10.1109/HLM51431.2021.9671135","DOIUrl":"https://doi.org/10.1109/HLM51431.2021.9671135","url":null,"abstract":"Contact mechanics models are widely used to analyze electrical contact behavior. Greenwood and Williamson (GW model) first developed a rough surface contact model to solve the problem of electrical contact. The original GW model used the Hertz single asperity model and a Gaussian distribution of the surface roughness. However, in many of the electrical contact cases, contact area surpasses the Hertz small contact region. For medium to complete contact cases, asperity interactions become very important and the Hertz model cannot predict this behavior. Besides asperity interaction, the probability distribution function (PDF) of the asperities of the rough surface is very important as not all the surfaces are Gaussian in nature. This work has shown the effect of asperity models to predict the asperity interaction behavior. Then the asperity models are applied with different PDF of the asperities of the rough surface in the framework of the statistical model. For the elastic case, the newly proposed rough surface models are compared with a Boundary Element Method (BEM) simulation result and the Persson model. For the elastic-plastic case, electrical contact resistance has been measured between two rough surfaces using the four-wire resistance method and then the newly proposed rough surface models are compared with the experimental results. Comparisons suggest that sinusoidal asperity model and the proper choice of the PDF of the asperity of the rough surface can effectively model the contact resistance behavior.","PeriodicalId":338653,"journal":{"name":"2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123184455","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

Electro-thermo-mechanical Contact Analysis Considering Temperature Dependent Material Properties and Electrical Contact Resistance Determination 考虑温度相关材料特性的电-热-机械接触分析和电接触电阻测定

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671138

S. Saha, Samuel Wynne, R. Jackson

{"title":"Electro-thermo-mechanical Contact Analysis Considering Temperature Dependent Material Properties and Electrical Contact Resistance Determination","authors":"S. Saha, Samuel Wynne, R. Jackson","doi":"10.1109/HLM51431.2021.9671138","DOIUrl":"https://doi.org/10.1109/HLM51431.2021.9671138","url":null,"abstract":"Electrical contact mechanics behaves in a complex way and the effect of temperature makes the contact behavior more complicated. To analyze the temperature dependent contact behavior an axisymmetric sinusoidal asperity model of tin has been developed using Finite Element method. The axisymmetric sinusoidal model reduces computational expenses and can effectively consider the asperity interaction, which is an important factor for large elastic-plastic deformation. The model considers temperature dependent yield strength, thermal conductivity and resistivity. Effect of thermal expansion co-efficient is also included. For material modeling, Johnson-Cook material model has been used which can model the temperature dependent material behavior from room temperature to melting temperature. Results show that temperature dependent resistivity and thermal conductivity are the key factors that govern the contact mechanism and temperature dependent yield strength has negligible effect on the electrical contact behavior. The finite element results have been validated comparing the results with the closed form solutions available for voltage-temperature relation. Later an equation has been suggested for the electrical contact resistance (ECR) determination, modifying the current equation derived by Greenwood and Williamson. The equation should be able to predict the contact resistance from room temperature to high temperature cases.","PeriodicalId":338653,"journal":{"name":"2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129124093","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: 3

Effects of molybdenum disulfide shot treatment on electrical sliding current of a slip ring 二硫化钼喷丸处理对滑环电滑电流的影响

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671207

Y. Kawashima, Yoshitada Watanabe, K. Sawa, T. Ueno

引用次数: 0

The 66th IEEE Holm Conference on Electrical Contacts 第66届IEEE霍尔姆电气接触会议

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/hlm51431.2021.9671127

A. Kuehl

{"title":"The 66th IEEE Holm Conference on Electrical Contacts","authors":"A. Kuehl","doi":"10.1109/hlm51431.2021.9671127","DOIUrl":"https://doi.org/10.1109/hlm51431.2021.9671127","url":null,"abstract":"The development of the electric motor goes back to a discovery by the Danish scientist Hans Christian Oersted, which was made 200 years ago [1]. He discovered that electric current has a magnetic effect and thus laid the foundation for further electromagnetic research work in the following years. Today, research on the processes of the electric motor production is more up to date than ever. Demands for increasing power densities are accompanied by higher efficiencies as well as lower losses, especially in the field of electrified automobiles and aviation. An important process step to meet these requirements is the contacting of the motor terminals, with the aim of reducing the electrical resistance of the winding. Therefore, in this paper the further development of the inductive crimping process is presented. Within the first chapters, the state of the art of the stripping and contacting process in the electric machine production as well as the challenges of the contacting process will be described. This is followed by a discussion of the inductive heating as well as the feasibility study of the inductive crimping process. Afterwards, the improvement of the process will be presented and the resulted connection will be qualified mechanically and electrically. Keywords— electric motor; hot crimping; inductive stripping; contacting; winding; electric motor production","PeriodicalId":338653,"journal":{"name":"2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126559534","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

Improving the Inductive Crimping Technology in the Production of Electric Motors 改进电机生产中的感应压接技术

2021 IEEE 66th Holm Conference on Electrical Contacts (HLM) Pub Date : 2021-10-24 DOI: 10.1109/HLM51431.2021.9671188

A. Kuehl, J. Franke

{"title":"Improving the Inductive Crimping Technology in the Production of Electric Motors","authors":"A. Kuehl, J. Franke","doi":"10.1109/HLM51431.2021.9671188","DOIUrl":"https://doi.org/10.1109/HLM51431.2021.9671188","url":null,"abstract":"The development of the electric motor goes back to a discovery by the Danish scientist Hans Christian Oersted, which was made 200 years ago [1]. He discovered that electric current has a magnetic effect and thus laid the foundation for further electromagnetic research work in the following years. Today, research on the processes of the electric motor production is more up to date than ever. Demands for increasing power densities are accompanied by higher efficiencies as well as lower losses, especially in the field of electrified automobiles and aviation. An important process step to meet these requirements is the contacting of the motor terminals, with the aim of reducing the electrical resistance of the winding. Therefore, in this paper the further development of the inductive crimping process is presented. Within the first chapters, the state of the art of the stripping and contacting process in the electric machine production as well as the challenges of the contacting process will be described. This is followed by a discussion of the inductive heating as well as the feasibility study of the inductive crimping process. Afterwards, the improvement of the process will be presented and the resulted connection will be qualified mechanically and electrically.","PeriodicalId":338653,"journal":{"name":"2021 IEEE 66th Holm Conference on Electrical Contacts (HLM)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134343764","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: 2