Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481194
Cao Jun-ci, Li Weili, Zhang Xiaochen, Tan Weihong
A new kind of induction motor with compound cage rotor (IMCCR) is proposed in this paper, in which rotor bars are composed of upper parts made of alloy (conductor for electric and magnetic) and lower parts made of cast aluminum. By using FEM, the electromagnetic and thermal fields of IMCCR are analyzed with coupling. The electromagnetic fields of motor operating with locked rotor and striking current are calculated first, and the transient heat transfer processes in motor are studied through thermal analysis. Thus, effects of operating state on motor performance are studied, especially for the windings insulation. The obtained results are compared with the experimental data.
{"title":"The short time transient thermal analysis of IMCCR in two special operating state","authors":"Cao Jun-ci, Li Weili, Zhang Xiaochen, Tan Weihong","doi":"10.1109/CEFC.2010.5481194","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481194","url":null,"abstract":"A new kind of induction motor with compound cage rotor (IMCCR) is proposed in this paper, in which rotor bars are composed of upper parts made of alloy (conductor for electric and magnetic) and lower parts made of cast aluminum. By using FEM, the electromagnetic and thermal fields of IMCCR are analyzed with coupling. The electromagnetic fields of motor operating with locked rotor and striking current are calculated first, and the transient heat transfer processes in motor are studied through thermal analysis. Thus, effects of operating state on motor performance are studied, especially for the windings insulation. The obtained results are compared with the experimental data.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"462 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":"123371903","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.2010.5481433
Yang Zhang, Guoqiang Liu, Wenjing He, H. Xia, Yanhong Li, Shiyou Yang
New technique of magnetoacoustic tomography with magnetic induction (MAT-MI) is introduced. Through improving the image reconstruction algorithm, the imaging object need not be placed in the uniform magnetic field area, and this make it possible for we to use only one permanent-magnet and one exciting coil to achieve image reconstruction. Therefore, the new technique can simplify the structure of the image system and then reduce the development cost availability. This is significant for the application of MAT-MI. To test the validity of the technique, test model was analyzed, and the availability of the method was demonstrated.
{"title":"New technique of magnetoacoustic tomography with magnetic induction","authors":"Yang Zhang, Guoqiang Liu, Wenjing He, H. Xia, Yanhong Li, Shiyou Yang","doi":"10.1109/CEFC.2010.5481433","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481433","url":null,"abstract":"New technique of magnetoacoustic tomography with magnetic induction (MAT-MI) is introduced. Through improving the image reconstruction algorithm, the imaging object need not be placed in the uniform magnetic field area, and this make it possible for we to use only one permanent-magnet and one exciting coil to achieve image reconstruction. Therefore, the new technique can simplify the structure of the image system and then reduce the development cost availability. This is significant for the application of MAT-MI. To test the validity of the technique, test model was analyzed, and the availability of the method was demonstrated.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"14 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":"125720313","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.2010.5481858
R. Salas, J. Pleite
This paper presents a 2D dynamic model of a ferrite inductor with an RM type core capable of reproducing the nonlinear effects of the core material, such as saturation and power losses, using 2D Finite Element simulations in the time-domain. Thus the computational cost is greately reduced. The effectiveness of the model is explored in the case of an inductor excited by a sinusoidal voltage source at frequencies of 500 Hz and 40 kHz. With this aim, experimental and computed results of voltage and current waveforms, power losses and nonlinear resistance (representing hysteresis and eddy current losses) are presented.
{"title":"Dynamic model of an RM type ferrite core to simulate the effects of saturation and power losses via 2D Finite Elements in the time domain","authors":"R. Salas, J. Pleite","doi":"10.1109/CEFC.2010.5481858","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481858","url":null,"abstract":"This paper presents a 2D dynamic model of a ferrite inductor with an RM type core capable of reproducing the nonlinear effects of the core material, such as saturation and power losses, using 2D Finite Element simulations in the time-domain. Thus the computational cost is greately reduced. The effectiveness of the model is explored in the case of an inductor excited by a sinusoidal voltage source at frequencies of 500 Hz and 40 kHz. With this aim, experimental and computed results of voltage and current waveforms, power losses and nonlinear resistance (representing hysteresis and eddy current losses) are presented.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"2016 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":"125732596","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.2010.5481311
D. Ionel, I. Brown
The described study involved interior permanent magnet (IPM) motors with distributed and concentrated (non-overlapping) stator windings. The machines were operated with sine-wave current-regulated power electronic drives. A coupled finite element model was used for the electromagnetic field and electric circuit analysis. Special instrumentation was employed for the measurement of 3D forces. It is shown that stator winding parallel paths can be very effective in reducing the effect of motor faults and asymmetries, such as rotor eccentricity.
{"title":"On the effect of winding parallel paths in synchronous permanent magnet electric machine drives","authors":"D. Ionel, I. Brown","doi":"10.1109/CEFC.2010.5481311","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481311","url":null,"abstract":"The described study involved interior permanent magnet (IPM) motors with distributed and concentrated (non-overlapping) stator windings. The machines were operated with sine-wave current-regulated power electronic drives. A coupled finite element model was used for the electromagnetic field and electric circuit analysis. Special instrumentation was employed for the measurement of 3D forces. It is shown that stator winding parallel paths can be very effective in reducing the effect of motor faults and asymmetries, such as rotor eccentricity.","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":"126819335","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.2010.5481094
Jin-ho Kim, Sang-shin Park, Se-Myung Park, Je-Hoon Kim, Jae-Yong Lee
In this paper, we propose a new design of the permanent magnet(PM) reluctance wheel to make possible the robot to be attached to vertical plane and be in motion. In newly suggested design, PM is utilized to enhance the adhesive force during attachment, while electromagnet is introduced to weaken magnetic field and reduce the adhesive force for easier detachment of wheels from steel plates. To characterize the performance, 3-D finite element analysis is executed using commercial FE program. Experimental test is performed to compare with the result of the analysis. The results show that the adhesive force is reduced effectively by the electromagnet.
{"title":"Design and experimental implementation of easily detachable permanent magnet reluctance wheel for wall-climbing mobile robot","authors":"Jin-ho Kim, Sang-shin Park, Se-Myung Park, Je-Hoon Kim, Jae-Yong Lee","doi":"10.1109/CEFC.2010.5481094","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481094","url":null,"abstract":"In this paper, we propose a new design of the permanent magnet(PM) reluctance wheel to make possible the robot to be attached to vertical plane and be in motion. In newly suggested design, PM is utilized to enhance the adhesive force during attachment, while electromagnet is introduced to weaken magnetic field and reduce the adhesive force for easier detachment of wheels from steel plates. To characterize the performance, 3-D finite element analysis is executed using commercial FE program. Experimental test is performed to compare with the result of the analysis. The results show that the adhesive force is reduced effectively by the electromagnet.","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":"115873841","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.2010.5481667
Jufang Wei, Lei Qi, Shili Liu, X. Cui, Weidong Zhang
Capacitance parameter extraction of converter system is crucial to analyze the voltage distribution of valve tower under different overvoltages (such as lightening, partial discharge, etc) in HVDC converter station. According to the actual dimension of valves, the Method of Moments(MOM) based on the point matching method is applied to extract the capacitances, including the self-capacitances and the mutual capacitances between the valve modules in the valve hall. Firstly the surfaces of conductors are meshed into small area elements, and the surface charge density of each element is considered as a constant. Then the potential coefficient matrix corresponding to elements can be achieved by MOM. The capacitance matrix can be acquired through matrix transformation. The proposed method is flexible and fast compared to the Finite Element Method (FEM) and Boundary Element Method (BEM), since it is unnecessary to solve the conductor surface charge and the electric field. The calculation results agree very well with the capacitance testing experiments.
{"title":"Capacitance parameter extraction of HVDC converter system by the Method of Moments","authors":"Jufang Wei, Lei Qi, Shili Liu, X. Cui, Weidong Zhang","doi":"10.1109/CEFC.2010.5481667","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481667","url":null,"abstract":"Capacitance parameter extraction of converter system is crucial to analyze the voltage distribution of valve tower under different overvoltages (such as lightening, partial discharge, etc) in HVDC converter station. According to the actual dimension of valves, the Method of Moments(MOM) based on the point matching method is applied to extract the capacitances, including the self-capacitances and the mutual capacitances between the valve modules in the valve hall. Firstly the surfaces of conductors are meshed into small area elements, and the surface charge density of each element is considered as a constant. Then the potential coefficient matrix corresponding to elements can be achieved by MOM. The capacitance matrix can be acquired through matrix transformation. The proposed method is flexible and fast compared to the Finite Element Method (FEM) and Boundary Element Method (BEM), since it is unnecessary to solve the conductor surface charge and the electric field. The calculation results agree very well with the capacitance testing experiments.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"34 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":"116650753","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.2010.5481345
Hao Jiang, Gan Zhou, Xueliang Huang, Haitao Yu, Lei Huang
In this paper, a novel high-precision planar magnetic levitation is proposed, which combines the advantages of Halbach PM array with the controllable maglev structure. For accurate motion control of the levitation the end-magnetic-field-effect on the stator windings is taken into account, thus the equivalent magnetic charge method is proposed to calculate the 3D end-magnetic-field and compared with the finite element analyses (FEA). The well matched comparison results are given to verify the validity of the method.
{"title":"Calculation and investigation of end-effect for a high-precision planar magnetic levitation","authors":"Hao Jiang, Gan Zhou, Xueliang Huang, Haitao Yu, Lei Huang","doi":"10.1109/CEFC.2010.5481345","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481345","url":null,"abstract":"In this paper, a novel high-precision planar magnetic levitation is proposed, which combines the advantages of Halbach PM array with the controllable maglev structure. For accurate motion control of the levitation the end-magnetic-field-effect on the stator windings is taken into account, thus the equivalent magnetic charge method is proposed to calculate the 3D end-magnetic-field and compared with the finite element analyses (FEA). The well matched comparison results are given to verify the validity of the method.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"89 18","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113943934","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.2010.5481679
F. Sabino, U. R. Vitor, M. T. de Melo
This paper shows a new way to calculate the electric field configuration produced in the vicinity of an Overhead Transmission Line (OHTL), when a information signal is inserted at one of these phases. The technology is called Power Line Communication (PLC) and through the software CST Microwave Studio®, it is possible to establish a region in the vicinity of the conductors to observe the obtained values which are compared with Brazilian standards limits.
{"title":"Electric field in Overhead Transmission Line for PLC signal","authors":"F. Sabino, U. R. Vitor, M. T. de Melo","doi":"10.1109/CEFC.2010.5481679","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481679","url":null,"abstract":"This paper shows a new way to calculate the electric field configuration produced in the vicinity of an Overhead Transmission Line (OHTL), when a information signal is inserted at one of these phases. The technology is called Power Line Communication (PLC) and through the software CST Microwave Studio®, it is possible to establish a region in the vicinity of the conductors to observe the obtained values which are compared with Brazilian standards limits.","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":"121685300","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.2010.5481774
N. C. Lenin, R. Arumugam
A novel stator geometry for linear switched reluctance motor (LSRM) that improves the force profile is presented. In the new geometry, pole shoes are affixed to the stator poles. Static and dynamic characteristics for the proposed structure have been highlighted. Frequency spectrum analyses of force profile using the fast Fourier transform (FFT) are described to predict the vibration frequencies. Furthermore a prophecy method for finding the steady-state and transient thermal characteristics of the LSRM are presented.
{"title":"Analysis and characterization of linear switched reluctance motors: Static, dynamic, frequency spectrum and thermal analyses","authors":"N. C. Lenin, R. Arumugam","doi":"10.1109/CEFC.2010.5481774","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481774","url":null,"abstract":"A novel stator geometry for linear switched reluctance motor (LSRM) that improves the force profile is presented. In the new geometry, pole shoes are affixed to the stator poles. Static and dynamic characteristics for the proposed structure have been highlighted. Frequency spectrum analyses of force profile using the fast Fourier transform (FFT) are described to predict the vibration frequencies. Furthermore a prophecy method for finding the steady-state and transient thermal characteristics of the LSRM are presented.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"67 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":"121530087","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.2010.5481456
Toshio Murayama, S. Sugimoto, S. Yoshimura
Novel time-harmonic formulation of a full-wave electromagnetic problem based on FDFD scheme is introduced and solved efficiently by recycling Krylov subspaces for multiple frequencies. In order to apply the COCR and COCG methods our formulation preserves the symmetric character of the matrix for PML by introducing asymmetric intellectual materials at outer boundaries. Our formulation can be fit into a family of shifted linear systems, that has identical right-hand sides and their coefficient matrices differ from each other only by complex scalar multiples of the identity matrix. Shifted-COCR and shifted-COCG methods are applied to exploit the special structure and the numerical costs are shown to be as the same as that for a single linear system.
{"title":"Simultaneous multi-frequency simulation by recycling Krylov subspaces in FDFD formulation","authors":"Toshio Murayama, S. Sugimoto, S. Yoshimura","doi":"10.1109/CEFC.2010.5481456","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481456","url":null,"abstract":"Novel time-harmonic formulation of a full-wave electromagnetic problem based on FDFD scheme is introduced and solved efficiently by recycling Krylov subspaces for multiple frequencies. In order to apply the COCR and COCG methods our formulation preserves the symmetric character of the matrix for PML by introducing asymmetric intellectual materials at outer boundaries. Our formulation can be fit into a family of shifted linear systems, that has identical right-hand sides and their coefficient matrices differ from each other only by complex scalar multiples of the identity matrix. Shifted-COCR and shifted-COCG methods are applied to exploit the special structure and the numerical costs are shown to be as the same as that for a single linear system.","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":"131189158","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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