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2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)最新文献

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MoM Computation of Losses of an Array of Parallel Magnetic and Conductive Wires in a Transverse Magneto-quasi-static Field 横向磁准静态场中并联导线和导线阵列损耗的MoM计算
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032757
L. Giussani, L. Di Rienzo, M. Bechis, C. de Falco
{"title":"MoM Computation of Losses of an Array of Parallel Magnetic and Conductive Wires in a Transverse Magneto-quasi-static Field","authors":"L. Giussani, L. Di Rienzo, M. Bechis, C. de Falco","doi":"10.1109/COMPUMAG45669.2019.9032757","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032757","url":null,"abstract":"A Trefftz-like method is proposed for the evaluation of losses in an array of parallel magnetic and conductive wires subject to an external time-harmonic magneto-quasi-static field. The formulation is tested on a two-dimensional model of a submarine three-core power cable armor. The accuracy of the method is verified by comparison with a reference Finite Element Method solution.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128535781","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 Topology Optimization Problem Setup on Switched Reluctance Machine Design 拓扑优化问题设置对开关磁阻电机设计的影响
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032826
Aino Manninen, Janne Keränen, J. Pippuri-Mäkeläinen, Tuomas Riipinen, S. Metsä-Kortelainen, T. Lindroos
{"title":"Impact of Topology Optimization Problem Setup on Switched Reluctance Machine Design","authors":"Aino Manninen, Janne Keränen, J. Pippuri-Mäkeläinen, Tuomas Riipinen, S. Metsä-Kortelainen, T. Lindroos","doi":"10.1109/COMPUMAG45669.2019.9032826","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032826","url":null,"abstract":"We study the topology optimization (TO) of an 8/6 switched reluctance motor rotor in terms of torque and mass. Together with additive manufacturing, topology optimization offers disruptive possibilities in electrical machine design. We investigate how sensitive the TO is to the problem setup by varying mesh density, material definitions and initial values of optimization. We also derive and implement three different optimization problem formulations to improve the electrical machine performance. As a result, we found that the geometry obtained with this method is sensitive to both material definition and mesh density. Further, the rotor mass could not be decreased significantly without compromising the average torque to some extent. However, through optimization, significant improvement of the torque values was gained for the rotor angles at the beginning or at the end of the stroke.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128343892","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
Homogenized 3-D FEM Model for Simulation of HTS Coils 高温超导线圈的均匀三维有限元模型
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032824
S. Gyimóthy, Anett Kenderes, S. Bilicz, J. Pávó, Z. Badics
{"title":"Homogenized 3-D FEM Model for Simulation of HTS Coils","authors":"S. Gyimóthy, Anett Kenderes, S. Bilicz, J. Pávó, Z. Badics","doi":"10.1109/COMPUMAG45669.2019.9032824","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032824","url":null,"abstract":"The spiral coil made of thin coated conducting tape is substituted by a homogenized bulk medium for the finite element simulation of its electromagnetic behavior. The homogenized medium is represented by an anisotropic conductivity tensor utilizing the underlying spiral structure. In addition to the significant reduction of the computational efforts, the method notably makes voltage on the coil terminals directly available in context of the A-V potential formulation. The main application is the simulation of large high-temperature superconducting coils, but any other devices with rolled foil conductor may be tackled similarly. In this work a feasibility study and simulation of the critical state are performed by means of a test problem.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124554656","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
Computation of transformer iron losses under saturation using the Fourier method Part 2: Stray loss 用傅里叶方法计算饱和状态下变压器铁的损耗。第二部分:杂散损耗
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032726
Wei Wang, A. Nysveen, N. Magnusson, R. Nilssen
{"title":"Computation of transformer iron losses under saturation using the Fourier method Part 2: Stray loss","authors":"Wei Wang, A. Nysveen, N. Magnusson, R. Nilssen","doi":"10.1109/COMPUMAG45669.2019.9032726","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032726","url":null,"abstract":"Computation of iron losses is a heavy numerical task, and the problem is further complicated by magnetic nonlinearity when saturation is considered. In an accompanying paper, a Fourier method for calculation of the transformer core loss under saturation is presented. In this paper, the influence of the permeability definition of the core material on leakage field and the associated stray loss calculation is studied. Based on the relationship between magnetic field and input current, a waveform correction factor is introduced which enables stray loss estimation of nonsinusoidal excitations. The results obtained by this method are compared to those given by a time domain calculation to evaluate the accuracy of the method.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121293672","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
Modelling Demagnetized Permanent Magnet Synchronous Generators using Permeance Network Model with Variable Flux Sources 基于磁通网络模型的变磁源消磁永磁同步发电机建模
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032791
Sveinung Attestog, H. Van Khang, K. Robbersmyr
{"title":"Modelling Demagnetized Permanent Magnet Synchronous Generators using Permeance Network Model with Variable Flux Sources","authors":"Sveinung Attestog, H. Van Khang, K. Robbersmyr","doi":"10.1109/COMPUMAG45669.2019.9032791","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032791","url":null,"abstract":"The partial demagnetization in a four-pole 1.5 kW surface mounted permanent-magnet synchronous-generator was modeled by permeance network model (PNM). The results were compared to a 2-D time-stepping finite element analysis (FEA). Both models where simulated in scenarios where one of the magnets where 20 % and 100 % demagntized and when none of the magnets where demagnetised. The results showed that the proposed PNM with variable magnetic flux sources matched the results of the FEA. The proposed method only need to invers the permeance matrix once before the time simulation, while the traditinal PNM need to invers it in every time step. This make the proposed model less computationally heavy when modeling electrical machines in healthy and faulty conditions, like demagnetization, short circuit, and static eccentricity. The difference is smaller when modeling dynamic eccentricity, becuase the geometry of the airgap changes over time.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116197723","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 Two Electro-Quasistatic Field Formulations for the Computation of Electric Field and Space Charges in HVDC Cable Systems 高压直流电缆系统中电场和空间电荷计算的两种拟静电场公式的比较
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032818
C. Jörgens, M. Clemens
{"title":"Comparison of Two Electro-Quasistatic Field Formulations for the Computation of Electric Field and Space Charges in HVDC Cable Systems","authors":"C. Jörgens, M. Clemens","doi":"10.1109/COMPUMAG45669.2019.9032818","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032818","url":null,"abstract":"Electro-quasistatic (EQS) field simulations are used to calculate electric field and space charge distributions in high voltage direct current (HVDC) cable systems. The constant voltage results in the accumulation of space charges and a time varying electric field. To simulate the electric field, different EQS formulations are introduced in literature. In a first formulation, the electric field and the space charge density are updated consecutively via the continuity equation and the electrostatic Poisson equation. In the second EQS formulation, the continuity formulation is reformulated using the electric scalar potential and only the electric field is updated per time step. To compare both EQS formulations, the electric fields are simulated in different HVDC cable systems. Simulation results of the electric field in a cable insulation result in relative errors of less than 1 % between both numerical computations and the analytic solution. Simulation results of a cable joint show instabilities for the field-space charge update EQS formulation, due to an averaging process of the charge density, whereas the scalar potential EQS formulation yield stable results when simulating nonlinear electric conductivities.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116353172","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
COMPUMAG 2019 Conference Chairmen’s Foreword 康普ag 2019会议主席序言
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/compumag45669.2019.9032736
{"title":"COMPUMAG 2019 Conference Chairmen’s Foreword","authors":"","doi":"10.1109/compumag45669.2019.9032736","DOIUrl":"https://doi.org/10.1109/compumag45669.2019.9032736","url":null,"abstract":"","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116961530","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
Topology Optimization with Improved Genetic Algorithm of an Electromagnetic Actuator 基于改进遗传算法的电磁作动器拓扑优化
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032829
S. Ruzbehi, I. Hahn
{"title":"Topology Optimization with Improved Genetic Algorithm of an Electromagnetic Actuator","authors":"S. Ruzbehi, I. Hahn","doi":"10.1109/COMPUMAG45669.2019.9032829","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032829","url":null,"abstract":"In conventional optimization, geometric optimization with changing the boundaries of the geometric shape is common, but in this study, topological optimization is applied to give the designer more freedom to achieve a machine design, which fulfils the customer’s goals. Topological optimization is common in the field of mechanical engineering, but in the design of electrical machines and electromagnetic actuators there is still an open space for its application.Having an electrical machine with high torque and low weight is one of the desired goals, which is investigated in this study. The implementation of the proposed method is applied to an electromagnetic actuator in order to optimize its topology or structure. To assess the validity of the proposed method, while considering the goals, the design of a simple magnetic actuator using a metaheuristic optimization method is presented as a global search. To overcome the generation of intermediate material characteristics in the cells of the design area, a binary genetic algorithm (GA) is used. Also, to enhance the low convergence rate of the GA, several chromosomes for each subarea of the design space are used independently of each other and operate at the same time, therefore, lead to a significant reduction of the computational time. The actuator’s force is calculated to gain the best material distribution in the discretized design area. After the automatic optimization process some manual changes in the material distribution are made to improve the manufacturability. The given design goals have been successfully achieved using the proposed topological optimization method.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124720393","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
COMPUMAG 2019 Session Chairs COMPUMAG 2019会议主席
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/compumag45669.2019.9032788
{"title":"COMPUMAG 2019 Session Chairs","authors":"","doi":"10.1109/compumag45669.2019.9032788","DOIUrl":"https://doi.org/10.1109/compumag45669.2019.9032788","url":null,"abstract":"","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131490912","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
Fast Methods for Speeding up the Induction Machine Simulation 加速感应电机仿真的快速方法
2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI: 10.1109/COMPUMAG45669.2019.9032762
C. Lu, D. Lin, N. Chen, B. He, P. Zhou
{"title":"Fast Methods for Speeding up the Induction Machine Simulation","authors":"C. Lu, D. Lin, N. Chen, B. He, P. Zhou","doi":"10.1109/COMPUMAG45669.2019.9032762","DOIUrl":"https://doi.org/10.1109/COMPUMAG45669.2019.9032762","url":null,"abstract":"In induction machine simulation, it usually takes quite a long time to reach the steady state due to the large time constant. In this paper, two methods are proposed to speed up the transient process to reach the steady state. In both methods, the initial condition of the simulation is estimated from the solution of FEA model with locked rotor and equivalent conductivity/resistance. The effectiveness of the methods is validated by two examples with the comparison of the performance between two methods.","PeriodicalId":317315,"journal":{"name":"2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115783980","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
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