Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481457
B. Gysen, K. Meessen, Johannes J. H. Paulides, E. Lomonova
This paper considers analytical and numerical techniques to model the magnetic field distribution in a tubular actuator with skewed permanent magnets (PMs). The analytical solution is obtained by solving the magnetostatic Maxwell equations in terms of the scalar potential for the 3D geometry. The 3D analytical solution is compared with 2.5D analytical solutions as well as 3D finite element solutions. Various skewing topologies will be considered and the accuracy of the 2.5D analytical solution on the skewing angle will be given.
{"title":"3D analytical and numerical modeling of skewed tubular magnet arrays","authors":"B. Gysen, K. Meessen, Johannes J. H. Paulides, E. Lomonova","doi":"10.1109/CEFC.2010.5481457","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481457","url":null,"abstract":"This paper considers analytical and numerical techniques to model the magnetic field distribution in a tubular actuator with skewed permanent magnets (PMs). The analytical solution is obtained by solving the magnetostatic Maxwell equations in terms of the scalar potential for the 3D geometry. The 3D analytical solution is compared with 2.5D analytical solutions as well as 3D finite element solutions. Various skewing topologies will be considered and the accuracy of the 2.5D analytical solution on the skewing angle will be given.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"30 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":"123037452","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.2010.5481282
A. Ngoly, S. McFee
The purpose of this contribution is to introduce a method for constructing sparse, efficient, accurate and reliable representations of large-scale, discretely sampled transient space-time electromagnetic wave fields, through the use of sparse wavelet approximations. The sparse wavelet approximations are achieved by performing a three step computational process that involves a forward Fast Wavelet Transform (FWT) step, a wavelet coefficient truncation step, and an inverse FWT (IFWT) step. Numerical results that demonstrate the applicability and versatility of the approach are provided. Rigorous error analyses are also provided to demonstrate the accuracy of the method.
{"title":"Sparse wavelet approximations to transient space-time electromagnetic wave fields","authors":"A. Ngoly, S. McFee","doi":"10.1109/CEFC.2010.5481282","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481282","url":null,"abstract":"The purpose of this contribution is to introduce a method for constructing sparse, efficient, accurate and reliable representations of large-scale, discretely sampled transient space-time electromagnetic wave fields, through the use of sparse wavelet approximations. The sparse wavelet approximations are achieved by performing a three step computational process that involves a forward Fast Wavelet Transform (FWT) step, a wavelet coefficient truncation step, and an inverse FWT (IFWT) step. Numerical results that demonstrate the applicability and versatility of the approach are provided. Rigorous error analyses are also provided to demonstrate the accuracy of the method.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"17 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":"114435461","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.2010.5481490
T. Arudchelvam, J. Wijayakulasooriya, S. Hoole
The development of code for finite elements-based field computation has been going on at a pace since the 1970s, yielding code that was not put through the formal software lifecycle. As a result, today we have legacy code running into millions of lines, implemented without planning and not using proper state-of-the-art software design tools. It is necessary to redo this code to exploit object oriented facilities and make corrections or run on the web in Java. Object oriented code's principal advantage is reusability. It is ideal for describing autonomous agents so that values inside a method are private unless otherwise so provided — that is encapsulation makes programming neat and less error-prone in unexpected situations. Recent advances in software make such reverse engineering/reengineering of this code into object oriented form possible. In this paper we reverse engineer legacy code in FORTRAN written decades ago for the computation of magnetic fields by the finite element method into the modern languages of Java and C++.
{"title":"Reverse engineering legacy code for finite element field computation in magnetics","authors":"T. Arudchelvam, J. Wijayakulasooriya, S. Hoole","doi":"10.1109/CEFC.2010.5481490","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481490","url":null,"abstract":"The development of code for finite elements-based field computation has been going on at a pace since the 1970s, yielding code that was not put through the formal software lifecycle. As a result, today we have legacy code running into millions of lines, implemented without planning and not using proper state-of-the-art software design tools. It is necessary to redo this code to exploit object oriented facilities and make corrections or run on the web in Java. Object oriented code's principal advantage is reusability. It is ideal for describing autonomous agents so that values inside a method are private unless otherwise so provided — that is encapsulation makes programming neat and less error-prone in unexpected situations. Recent advances in software make such reverse engineering/reengineering of this code into object oriented form possible. In this paper we reverse engineer legacy code in FORTRAN written decades ago for the computation of magnetic fields by the finite element method into the modern languages of Java and C++.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"251 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":"114544475","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.2010.5481051
Young-kyoun Kim, S. Rhyu, I. Jung
This paper deals with the design comparison of two type BLDC motor for the electric power steering, which are a surface mounted permanent magnet motor and an interior permanent magnet motor.
本文对电动助力转向用两种无刷直流电机进行了设计比较，即表面贴装式永磁电机和内置式永磁电机。
{"title":"Reduction design of cogging torque of BLDC motor for EPS application","authors":"Young-kyoun Kim, S. Rhyu, I. Jung","doi":"10.1109/CEFC.2010.5481051","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481051","url":null,"abstract":"This paper deals with the design comparison of two type BLDC motor for the electric power steering, which are a surface mounted permanent magnet motor and an interior permanent magnet motor.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"25 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":"116848045","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.2010.5481782
M. Barham, D. White
We are interested in the deformation of a thin magnetoelastic film. This has many possible applications, such as in microfluidic actuators and sensors. In previous articles a finite element method has been used for transient simulation of the deformation of the film, for the special case of soft magnetic material only. In this article the approach is extended to the case of hard (permanent) magnetoelastic materials. The hard magnetic material case involves an additional system of equations for the self-field, and it also results in a non-symmetric Maxwell stress tensor.
{"title":"Finite element simulation of hard magnetoelastic thin films","authors":"M. Barham, D. White","doi":"10.1109/CEFC.2010.5481782","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481782","url":null,"abstract":"We are interested in the deformation of a thin magnetoelastic film. This has many possible applications, such as in microfluidic actuators and sensors. In previous articles a finite element method has been used for transient simulation of the deformation of the film, for the special case of soft magnetic material only. In this article the approach is extended to the case of hard (permanent) magnetoelastic materials. The hard magnetic material case involves an additional system of equations for the self-field, and it also results in a non-symmetric Maxwell stress tensor.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"30 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":"117104783","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.2010.5481722
M. Rigoni, N. Sadowski, N. Batistela, J. Bastos, S. L. Nau, A. Kost
This paper presents electromagnetic FEM field calculations and measured data on a three-phase induction motor. This machine is on purpose adapted to allow moving its rotor and so imposing eccentricities. The influence of the eccentricity is investigated by calculations and verified by measurements with a newly designed magnetic sensor and electronic device.
{"title":"Calculation and experimental analysis of induction motor eccentricity","authors":"M. Rigoni, N. Sadowski, N. Batistela, J. Bastos, S. L. Nau, A. Kost","doi":"10.1109/CEFC.2010.5481722","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481722","url":null,"abstract":"This paper presents electromagnetic FEM field calculations and measured data on a three-phase induction motor. This machine is on purpose adapted to allow moving its rotor and so imposing eccentricities. The influence of the eccentricity is investigated by calculations and verified by measurements with a newly designed magnetic sensor and electronic device.","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":"129417746","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.2010.5481678
Y. Gessese, A. Binder
The performance of a 3-phase, 4-pole, 24000 rpm, axially slitted and radially grooved high-speed solid rotor induction motor (SRIM) with copper end-rings is studied and analyzed numerically, using a 2D FEM tool. The prototype motor is constructed and tested. The FEM simulation results are compared with the measured ones.
{"title":"Design and analysis of specific high-speed solid rotor induction motor with copper end rings","authors":"Y. Gessese, A. Binder","doi":"10.1109/CEFC.2010.5481678","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481678","url":null,"abstract":"The performance of a 3-phase, 4-pole, 24000 rpm, axially slitted and radially grooved high-speed solid rotor induction motor (SRIM) with copper end-rings is studied and analyzed numerically, using a 2D FEM tool. The prototype motor is constructed and tested. The FEM simulation results are compared with the measured ones.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"25 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":"124004518","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.2010.5481441
Naiguag Lei, S. Reyes‐Rodríguez, L. Udpa, S. Udpa
This paper presents a feasibility study of imaging discontinuities in dielectric materials using principles of time reversal with microwaves. The principle is demonstrated by modeling the propagation of forward and time reversed electromagnetic waves using 3D finite difference time domain techniques. Simulations results validating this approach will be presented. Initial results clearly demonstrate the capability of this approach to image locations of discontinuities in materials.
{"title":"3D modeling of time reversal microwave imaging in nondestructive evaluation","authors":"Naiguag Lei, S. Reyes‐Rodríguez, L. Udpa, S. Udpa","doi":"10.1109/CEFC.2010.5481441","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481441","url":null,"abstract":"This paper presents a feasibility study of imaging discontinuities in dielectric materials using principles of time reversal with microwaves. The principle is demonstrated by modeling the propagation of forward and time reversed electromagnetic waves using 3D finite difference time domain techniques. Simulations results validating this approach will be presented. Initial results clearly demonstrate the capability of this approach to image locations of discontinuities in materials.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"48 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":"124029386","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.2010.5481694
Y. Ahn, Sang-Yong Jung
New design methodology using the numerically identified the synthetic flux linkages for Interior Permanent Magnet Synchronous Motor(IPMSM) with multi-layered PMs is proposed. Furthermore, the cross-magnetization between the d-q axis in IPMSM mainly due to the magnetic saturation is investigated via the adopted synthetic flux linkages. The proposed design methodology using the numerically identified synthetic flux linkages by Finite Element Analysis (FEA) is validated with the experimental ones for the purposely-built prototype.
{"title":"Design methodology using the newly proposed synthetic flux linkages considering cross-Magnetization for Interior PM Synchronous Machine","authors":"Y. Ahn, Sang-Yong Jung","doi":"10.1109/CEFC.2010.5481694","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481694","url":null,"abstract":"New design methodology using the numerically identified the synthetic flux linkages for Interior Permanent Magnet Synchronous Motor(IPMSM) with multi-layered PMs is proposed. Furthermore, the cross-magnetization between the d-q axis in IPMSM mainly due to the magnetic saturation is investigated via the adopted synthetic flux linkages. The proposed design methodology using the numerically identified synthetic flux linkages by Finite Element Analysis (FEA) is validated with the experimental ones for the purposely-built prototype.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"58 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":"123224518","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.2010.5481379
Phillip A. M. Sandborn, D. Hull, S. Vinci
Charged objects such as aircraft and projectiles create a moving electric field which can be detected by sensors in the vicinity of such objects. Arrays of these sensors can be used to estimate charge, position, and velocity of the charged objects. Sensor platforms generally distort these electric fields. For some applications, it is beneficial to know how the platforms distort these electric fields. Several closed form, analytical solutions for electric fields around simple geometries were constructed and compared to equivalent Method of Moments (MoM) numerical solutions. Other MoM models permit analysis of fields that cannot be solved in closed form. These models can be used to design electric-field sensor systems used to detect, localize, and range charged aircraft or projectiles.
{"title":"Distortion of sensed electric field by conducting sensor platforms","authors":"Phillip A. M. Sandborn, D. Hull, S. Vinci","doi":"10.1109/CEFC.2010.5481379","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481379","url":null,"abstract":"Charged objects such as aircraft and projectiles create a moving electric field which can be detected by sensors in the vicinity of such objects. Arrays of these sensors can be used to estimate charge, position, and velocity of the charged objects. Sensor platforms generally distort these electric fields. For some applications, it is beneficial to know how the platforms distort these electric fields. Several closed form, analytical solutions for electric fields around simple geometries were constructed and compared to equivalent Method of Moments (MoM) numerical solutions. Other MoM models permit analysis of fields that cannot be solved in closed form. These models can be used to design electric-field sensor systems used to detect, localize, and range charged aircraft or projectiles.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"7 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":"127888354","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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