Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481715
Lianyou Sun, J. P. Webb, W. Hong
Edge elements and a decomposition projective method are used to solve scattering problems of electrically large objects. A numerical example shows that approach is accurate and efficient.
利用边缘元和分解投影法求解电大物体的散射问题。数值算例表明了该方法的准确性和有效性。
{"title":"Edge elements and the decomposition projective method to solve scattering problems of electrically large objects","authors":"Lianyou Sun, J. P. Webb, W. Hong","doi":"10.1109/CEFC.2010.5481715","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481715","url":null,"abstract":"Edge elements and a decomposition projective method are used to solve scattering problems of electrically large objects. A numerical example shows that approach is accurate and efficient.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125786754","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481628
A. Jarrah, S. Clénet, A. Benabou, R. Ramarotafika
The aim of this work is to study, using a statistical approach, the macroscopic behavior of a given number of anisotropic laminations, stacked randomly.
这项工作的目的是研究，使用统计方法，宏观行为的各向异性片的给定数量，随机堆叠。
{"title":"Statistical modeling of an anisotropic lamination stack","authors":"A. Jarrah, S. Clénet, A. Benabou, R. Ramarotafika","doi":"10.1109/CEFC.2010.5481628","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481628","url":null,"abstract":"The aim of this work is to study, using a statistical approach, the macroscopic behavior of a given number of anisotropic laminations, stacked randomly.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129249828","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481550
L. D. de Medeiros, M. T. de Melo, P. R. de Freitas, M. H. L. de Sousa, F. N. Fraga
This paper presents the behavior of a grounding mesh in presence of a high-frequency overvoltage transient caused by switch closing in electrical substations and atmospheric discharges. The simulation of the mesh is based on Transmission Line Method (TLM). The output of the simulation is the sum of induced and conducted currents caused by such high-frequency overvoltage input in some spot of the mesh. Thin wires are represented by nodes developed by Naylor and Christopoulos.
{"title":"Analysis of real overvoltage transient in a TLM-modeled","authors":"L. D. de Medeiros, M. T. de Melo, P. R. de Freitas, M. H. L. de Sousa, F. N. Fraga","doi":"10.1109/CEFC.2010.5481550","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481550","url":null,"abstract":"This paper presents the behavior of a grounding mesh in presence of a high-frequency overvoltage transient caused by switch closing in electrical substations and atmospheric discharges. The simulation of the mesh is based on Transmission Line Method (TLM). The output of the simulation is the sum of induced and conducted currents caused by such high-frequency overvoltage input in some spot of the mesh. Thin wires are represented by nodes developed by Naylor and Christopoulos.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129273892","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481870
Xiaoyan Wang, D. Xie, W. Fu
This paper presents a material modeling method of silicon steel sheet considering harmonic magnetic field in the model. A new experiment method that can provide magnetic property data of high-order harmonic magnetic field is introduced. A material modeling method associated with the measurement data is provided. A novel time periodic iterative method of finite element analysis (FEA) is proposed to consider dynamic magnetic property.
{"title":"A novel method of modeling 2D magnetic properties of electrical steel sheet in electromagnetic devices","authors":"Xiaoyan Wang, D. Xie, W. Fu","doi":"10.1109/CEFC.2010.5481870","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481870","url":null,"abstract":"This paper presents a material modeling method of silicon steel sheet considering harmonic magnetic field in the model. A new experiment method that can provide magnetic property data of high-order harmonic magnetic field is introduced. A material modeling method associated with the measurement data is provided. A novel time periodic iterative method of finite element analysis (FEA) is proposed to consider dynamic magnetic property.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129352073","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481464
S. Paul, Dheeraj Bobba, J. Bird
An efficient three-dimensional transient finite element method for calculating the lift, thrust and lateral forces created when a magnetic rotor is both translationally moved and rotated above an aluminum sheet guideway is presented. The rotor field is calculated from an equivalent fictitious magnetic charge sheet formula. The rotor field's effect on the guideway is accounted for by incorporating the field terms into the guideway boundary conditions. This model is validated by comparing it with steady-state experimental and finite element calculations.
{"title":"Three dimensional transient modeling of a halbach rotor moving above a conductive guideway using fictitious magnetic charge","authors":"S. Paul, Dheeraj Bobba, J. Bird","doi":"10.1109/CEFC.2010.5481464","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481464","url":null,"abstract":"An efficient three-dimensional transient finite element method for calculating the lift, thrust and lateral forces created when a magnetic rotor is both translationally moved and rotated above an aluminum sheet guideway is presented. The rotor field is calculated from an equivalent fictitious magnetic charge sheet formula. The rotor field's effect on the guideway is accounted for by incorporating the field terms into the guideway boundary conditions. This model is validated by comparing it with steady-state experimental and finite element calculations.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129214970","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481789
Jaenam Bae, Chang-Sung Jin, Won-Ho kim, Ik-Sang Jang, S. Won, Ju Lee
When we design an IPMSM, we start with the output and the voltage equations of the machines. The output equation has two terms which are magnetic torque and reluctance torque. The magnetic torque is related to the electric-and magnetic-loading but reluctance torque is related to one more variable which is the difference of the d-and q-axis inductance. Therefore it is very important to calculate or estimate the d- and q-axis inductance in the design procedure. In this paper, we proposed the inductance calculation method by relative permeance. The result is reasonable to the initial design.
{"title":"Inductance calculation by relative permeance for the IPMSM design","authors":"Jaenam Bae, Chang-Sung Jin, Won-Ho kim, Ik-Sang Jang, S. Won, Ju Lee","doi":"10.1109/CEFC.2010.5481789","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481789","url":null,"abstract":"When we design an IPMSM, we start with the output and the voltage equations of the machines. The output equation has two terms which are magnetic torque and reluctance torque. The magnetic torque is related to the electric-and magnetic-loading but reluctance torque is related to one more variable which is the difference of the d-and q-axis inductance. Therefore it is very important to calculate or estimate the d- and q-axis inductance in the design procedure. In this paper, we proposed the inductance calculation method by relative permeance. The result is reasonable to the initial design.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129642801","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481014
A. Eroglu
Dyadic Green's functions (DGFs) for a two-layered electrically gyrotropic or gyroelectric medium are derived using k-domain approach. Gyroelectric medium is assumed to be bounded by isotropic media in the upper and lower sides. Transmission and reflection coefficients for the two-layered medium used in the DGFs are expressed in terms of half space transmission and reflection coefficients using the matrix method with the application of boundary conditions. This drastically reduced the complexity of the problem for the two-layered structure. The results presented here can be used for radiation or scattering problems in the presence of a layered media involving complex medium such as gyroelectric.
{"title":"Dyadic Green's functions for two-layered electrically gyrotropic media","authors":"A. Eroglu","doi":"10.1109/CEFC.2010.5481014","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481014","url":null,"abstract":"Dyadic Green's functions (DGFs) for a two-layered electrically gyrotropic or gyroelectric medium are derived using k-domain approach. Gyroelectric medium is assumed to be bounded by isotropic media in the upper and lower sides. Transmission and reflection coefficients for the two-layered medium used in the DGFs are expressed in terms of half space transmission and reflection coefficients using the matrix method with the application of boundary conditions. This drastically reduced the complexity of the problem for the two-layered structure. The results presented here can be used for radiation or scattering problems in the presence of a layered media involving complex medium such as gyroelectric.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124887937","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}
In this paper, a resonant coupling wireless power transmission system whose resonator using single-layer helical coils is designed. Based on analysis of equivalent circuit, the efficiency and optimal transmission distance are obtained, and its correctness is verified by experiment. The resonant frequency and electromagnetic field distribution of system are obtained through high frequency finite element simulation, and experimental result is consistent with the simulation. Based on experiments, the output load voltage related with different distance, driving frequency and displacement is analyzed.
{"title":"Design and analysis of resonant coupling wireless power transmission system","authors":"Zhuo Yan, Haiyan Chen, Qingxin Yang, Chao Zhang, Guizhi Xu","doi":"10.1109/CEFC.2010.5481521","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481521","url":null,"abstract":"In this paper, a resonant coupling wireless power transmission system whose resonator using single-layer helical coils is designed. Based on analysis of equivalent circuit, the efficiency and optimal transmission distance are obtained, and its correctness is verified by experiment. The resonant frequency and electromagnetic field distribution of system are obtained through high frequency finite element simulation, and experimental result is consistent with the simulation. Based on experiments, the output load voltage related with different distance, driving frequency and displacement is analyzed.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130546022","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481398
A. Musolino, R. Rizzo
This paper presents a new passive magnetic bearing system that is capable to rotate without contact at a short distance from a dedicated stator. The magnetic suspension is assured by the repulsion between two arrangements of permanent magnets located both on toroidal shaped stator and rotor. The stator magnets are surrounded by a conductive sheet. The presence of eddy currents due to the relative motion between the rotor magnets and the conductive sheet allows overcoming the intrinsic instability of the system. The dependence of the stabilizing force on the angular velocity will be determined as well as the levitation force, the magnetic drag force and the power dissipated in the conductor sheet by the stabilizing eddy currents.
{"title":"Passively stabilized magnetic bearings","authors":"A. Musolino, R. Rizzo","doi":"10.1109/CEFC.2010.5481398","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481398","url":null,"abstract":"This paper presents a new passive magnetic bearing system that is capable to rotate without contact at a short distance from a dedicated stator. The magnetic suspension is assured by the repulsion between two arrangements of permanent magnets located both on toroidal shaped stator and rotor. The stator magnets are surrounded by a conductive sheet. The presence of eddy currents due to the relative motion between the rotor magnets and the conductive sheet allows overcoming the intrinsic instability of the system. The dependence of the stabilizing force on the angular velocity will be determined as well as the levitation force, the magnetic drag force and the power dissipated in the conductor sheet by the stabilizing eddy currents.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130957374","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}
Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481651
H. Won, Sung yeol Cho, G. Park
In this paper, new MRAM designs for high Gb/Chip with pole system was introduced. In order to overcome problem of reducing power consumption, we proposed new MRAM design that has two additional high permeable poles. Proposed new MRAM designs has a strong switching field owing to two poles added on both sides of the free layer, just like perpendicular magnetic recording heads.
{"title":"Introduction and analysis of the MRAM with pole type system by using micromagnetic approach for high Gb/Chip","authors":"H. Won, Sung yeol Cho, G. Park","doi":"10.1109/CEFC.2010.5481651","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481651","url":null,"abstract":"In this paper, new MRAM designs for high Gb/Chip with pole system was introduced. In order to overcome problem of reducing power consumption, we proposed new MRAM design that has two additional high permeable poles. Proposed new MRAM designs has a strong switching field owing to two poles added on both sides of the free layer, just like perpendicular magnetic recording heads.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127299543","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}
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