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Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)最新文献

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The impact of deadtime effect on unwanted harmonics conducted emission of PWM inverters 死区效应对PWM逆变器不良谐波传导发射的影响
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853939
S. Kaitwanidvilai, W. Khan-ngern, M. Panarut
{"title":"The impact of deadtime effect on unwanted harmonics conducted emission of PWM inverters","authors":"S. Kaitwanidvilai, W. Khan-ngern, M. Panarut","doi":"10.1109/CEEM.2000.853939","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853939","url":null,"abstract":"This paper presents an analysis of unwanted harmonics spectra impacted by deadtime effect which is the one of the conducted emission sources at the load terminal of PWM inverters. The unwanted voltage from this impact is shown that it is depend upon not only load current direction, deadtime interval, DC link voltage but also amplitude and phasor of the load. The analysis with Fourier transform theory is clearly shown this phenomena and the simulated and measured results for harmonics injection PWM and discontinuous PWM with deadtime of 2% and 4% of switching time are presented in this paper. The deadtime compensated show the improvement for PWM inverter performance. The results show closed agreement between both of results with a good support from the analysis and simulation.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124000161","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: 5
Radiation of wire buried in a lossy half space 埋在有损耗半空间中的导线辐射
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853900
Zhang Kun, Gao You-gang
{"title":"Radiation of wire buried in a lossy half space","authors":"Zhang Kun, Gao You-gang","doi":"10.1109/CEEM.2000.853900","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853900","url":null,"abstract":"A wire is buried in a lossy half-space. The finite-difference time domain (FDTD) is used to calculate the radiation pattern of the wire. One of the key technologies is near- to far-zone transformation proposed by K. Demarest, the other is contour integral model of a thin wire proposed by A. Taflove. The PML absorption boundary condition is used for truncation of FDTD lattices.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129389444","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
Shielding properties of infinite metallic plate with an aperture 带孔无限金属板的屏蔽性能
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853954
Ma Shuangwu, Li Chuanjun, Gao You-gang
{"title":"Shielding properties of infinite metallic plate with an aperture","authors":"Ma Shuangwu, Li Chuanjun, Gao You-gang","doi":"10.1109/CEEM.2000.853954","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853954","url":null,"abstract":"Shielding effectiveness and transmitted field distribution are calculated by using the finite-difference time-domain method (FDTD) and perfectly matched layer technique in this paper. An infinite metallic plate with an aperture illuminated by a steady sinusoidal plane wave is modeled. Some numerical results and discussions are given.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129737735","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
Magnetic field reduction of power cables by multi-splitting of conductors and compensation effects 导体多次分裂及补偿效应对电力电缆磁场的影响
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853893
M. Ehrich, L. Fichte, M. Luer
{"title":"Magnetic field reduction of power cables by multi-splitting of conductors and compensation effects","authors":"M. Ehrich, L. Fichte, M. Luer","doi":"10.1109/CEEM.2000.853893","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853893","url":null,"abstract":"The magnetic field of a twisted three-phase power cable of finite length can be drastically reduced by distributing its currents over 3N single conductors which are arranged in a specific order. The induction of the resulting multi-wire cable is expressed analytically by the help of integrals, and furthermore without integration by a simple model consisting of twist-free elements. As numerical results we display 3D-plots of the field distribution and diagrams of the resulting field attenuation factor for different splitting steps N of the original cable.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128855840","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: 5
The study of metal meshes on electromagnetic interference shielding effectiveness 金属网对电磁干扰屏蔽效果的研究
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853958
L. Dichen, Deng Suqiao
{"title":"The study of metal meshes on electromagnetic interference shielding effectiveness","authors":"L. Dichen, Deng Suqiao","doi":"10.1109/CEEM.2000.853958","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853958","url":null,"abstract":"There is a good shielding effectiveness of metal meshes on electromagnetic interference caused by all kinds of reasons. 11 metal meshes of different specification of four materials are tested at different frequency steady-state fields and single variable transient fields. Also, their shielding effectiveness is calculated and analyzed. The results of the tests and analysis show that: (1) shielding effectiveness is correlated with factors such as the meshes diameter, mesh variable-density structure standards and so on; (2) within a certain frequency, the effect of mesh size on shielding effectiveness is small; metal materials shielding effectiveness changes with the frequency's variety; and (3) in shielding of the tying measure of metal mesh weld show its superiority over the screw. We must ground the shielding body reliably. The tests and analysis results of this paper are of important significance in anti-interference study and application to electromagnetic compatibility, modern monitors, communication, and computer control rooms.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127078818","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: 6
Design of elliptic function LPF and its group delay equalizer [video signal processing] 椭圆函数LPF及其群延迟均衡器的设计[视频信号处理]
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853955
Hu Rui, C. Hao, Gao Houqin
{"title":"Design of elliptic function LPF and its group delay equalizer [video signal processing]","authors":"Hu Rui, C. Hao, Gao Houqin","doi":"10.1109/CEEM.2000.853955","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853955","url":null,"abstract":"This paper introduces a way of designing a low-pass filter (LPF) by an elliptic function. It then describes the design of a group delay equalizer to compensate the phase distortion present.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126097069","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
Application of FD-TD method in calculating electric and magnetic fields in T-TEM cell FD-TD法在T-TEM细胞电场和磁场计算中的应用
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853944
J. Shenhui, Jiang Quanxing
{"title":"Application of FD-TD method in calculating electric and magnetic fields in T-TEM cell","authors":"J. Shenhui, Jiang Quanxing","doi":"10.1109/CEEM.2000.853944","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853944","url":null,"abstract":"The finite-difference time-domain (FD-TD) method is applied to calculate the distribution of electric and magnetic field in Triple-TEM (T-TEM) cell that has been made in our EMC laboratory. A few important problems are studied carefully, such as: the simulation of wave source, the resistance plane and absorbing materials as terminal load at the back of the cell, the absorbing boundary conditions etc. The procedure for calculation is compiled in C++ language. The calculation results are analyzed carefully.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126257460","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
Comparison between some absorbing boundary conditions and numerical validation 几种吸收边界条件的比较及数值验证
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853897
Ma Shang-wu, Gao You-gang
{"title":"Comparison between some absorbing boundary conditions and numerical validation","authors":"Ma Shang-wu, Gao You-gang","doi":"10.1109/CEEM.2000.853897","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853897","url":null,"abstract":"A comparison between some important ABCs in the finite-difference time-domain (FDTD) technique has been made in this paper. These ABCs include Mur's second-order absorbing boundary condition, superabsorption technique and perfectly matched layer (PML) technique. Numerical tests are made. Some suggestions and conclusion are given.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121485463","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
A method-of-moments approach to EM environment assessment nearby high-voltage transmission lines 高压输电线路附近电磁环境评价的矩量法
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853927
Yong Cheng, W. Cao
{"title":"A method-of-moments approach to EM environment assessment nearby high-voltage transmission lines","authors":"Yong Cheng, W. Cao","doi":"10.1109/CEEM.2000.853927","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853927","url":null,"abstract":"A moment method analysis is presented in this paper for computing the electrical field intensity in the surrounding space of a high-voltage multiconductor transmission line above the ground. In this analysis, the number of conductors, and the shape of cross-section of lines are assumed to be arbitrary. As a result, this formulation and its corresponding computer program would be applicable to the assessment of electromagnetic pollution produced by a high-voltage multiconductor transmission line system and may be used in calculation of interference between power system and telecommunication lines as well. The computed results are compared with those obtained by using an analytical approach and a good agreement between the two results justifies the correctness and effectiveness of this method.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132678178","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
A new time-domain model of the impedance of lossy soil in MTL model MTL模型中含土阻抗的一种新的时域模型
Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402) Pub Date : 2000-05-03 DOI: 10.1109/CEEM.2000.853918
T. Lu, X. Cui, Weidong Zhang
{"title":"A new time-domain model of the impedance of lossy soil in MTL model","authors":"T. Lu, X. Cui, Weidong Zhang","doi":"10.1109/CEEM.2000.853918","DOIUrl":"https://doi.org/10.1109/CEEM.2000.853918","url":null,"abstract":"In order to research the problems of electromagnetic compatibility (EMC) at electric power substations or electromagnetic interference generated by carrier channels on multi-conductor power transmission lines, the finite-difference time-domain (FDTD) method and multi-conductor transmission lines (MTLs) model can be used. But the impedance due to lossy soil is dependent on the frequency, so the problem is very complex. One new model to deal with it in the time-domain is proposed using Pade's approximation. Contrasted with other methods, the model is accurate and can be used practically.","PeriodicalId":153945,"journal":{"name":"Proceedings. Asia-Pacific Conference on Environmental Electromagnetics. CEEM'2000 (IEEE Cat. No.00EX402)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116652807","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
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