1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)最新文献_第5页

Characterization of shield inhomogeneities of multiconductor cables by evaluation of measured transfer impedances and admittances 用测量的传输阻抗和导纳评价多导体电缆屏蔽不均匀性

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810078

L. Jung, J. Luiken ter Haseborg

引用次数: 1

Switching-off phenomena in an L-C-R network L-C-R网络中的开关现象

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812965

I. Finkelstein, A. Axelrod, E. Joffe

{"title":"Switching-off phenomena in an L-C-R network","authors":"I. Finkelstein, A. Axelrod, E. Joffe","doi":"10.1109/ISEMC.1999.812965","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812965","url":null,"abstract":"Voltage transients on power leads, protected by L-C-R filters, due to a switching-on event, were discussed in our previous paper. In this paper the transient effects in L-C-R circuits at switching-off events are investigated, with emphasis on the overvoltage transients developed across the terminals of the switching device, and transients across the power line leads of the output ports of the L-C-R filter. In addition, the gradual transition of the solid state device from \"on\" to \"off\", states and the consequent time dependent behavior of its dynamic impedance are investigated. It is shown that a gradual variation of the switch resistance results in a drastic reduction of the overvoltage amplitude. The analysis demonstrated that an oscillatory process may be developed during the switch-off event, primarily due to the series resonant circuit composed of the series filter inductor and the switch parasitic capacitance, however, under certain circuit conditions, the transient process may be a-periodic. Results of this investigation can be applied for the optimization of L-C-R filter networks, and for the proper selection of switching elements.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134530123","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

The activities of ANSI Accredited Committee C63 (EMC), Subcommittee One (techniques and developments) ANSI认证委员会C63 (EMC)第一小组委员会(技术和发展)的活动

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812913

D. Heirman

引用次数: 0

Analysis of electromagnetic fields generated by lightning in different configurations of protection structures 雷电在不同防护结构配置下产生的电磁场分析

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812889

G. Caixeta, F.J. Pissolato

{"title":"Analysis of electromagnetic fields generated by lightning in different configurations of protection structures","authors":"G. Caixeta, F.J. Pissolato","doi":"10.1109/ISEMC.1999.812889","DOIUrl":"https://doi.org/10.1109/ISEMC.1999.812889","url":null,"abstract":"This paper presents results of the electromagnetic field generated by different configurations of protection structures, when lightning strikes such structures. The transitory nature of the current in the structure, and the return current is taken into account in the calculation of the field. This paper also presents an elegant expression for calculating the resultant electromagnetic field produced by the current transients in cables or transmission lines. By taking into consideration a line disposed arbitrarily in the Cartesian coordinate system, using the Maxwell equations and applying the magnetic potential vector, we come to the generalized expressions for the electric and magnetic fields as a function of current and position in the time domain. This expression is a generalization of the expression proposed by Christopoulos. The method has been shown to be very useful in applications where lines are disposed in arbitrary manners and especially in systems in which various lines are interconnected such as lightning protection systems (LPS) or a grounding system. The results obtained with such expressions are compared to other numerical methods. The results are obtained applying TLM (transmission ine modeling) method to obtain the current transient.","PeriodicalId":312828,"journal":{"name":"1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115908175","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

EMC test laboratory assessment EMC测试实验室评估

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812907

M. Matejic

引用次数: 1

Comparison of spectral measurement compliance techniques for direct sequence spread spectrum transmitters and broadband digital wireless phones 直接序列扩频发射机与宽带数字无线电话频谱测量符合性技术的比较

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812871

W.H. Graff

引用次数: 1

Design of a Helmholtz coil for susceptibility testing using variational calculus and experimental verification 用变分演算和实验验证设计一个亥姆霍兹线圈

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810084

T. Anderson

引用次数: 12

Analysis of shielded tents and other electrically thin shielded rooms 屏蔽帐篷和其他电薄屏蔽房间的分析

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812867

L. Hoeft, C. Wiggins

引用次数: 3

Solutions of the transmission line equations modified to include excitation by, and reradiation of, electromagnetic fields 修改为包含电磁场激励和电磁场辐射的传输线方程的解

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.812939

D. A. Larrabee

引用次数: 8

Creating a measurement scheduler for automated operation of the radio spectrum measurement system 为无线电频谱测量系统的自动化操作创建测量调度程序

1999 IEEE International Symposium on Electromagnetic Compatability. Symposium Record (Cat. No.99CH36261) Pub Date : 1999-08-02 DOI: 10.1109/ISEMC.1999.810107

J. Kub

引用次数: 1