Pub Date : 2010-05-09DOI: 10.1109/CEFC.2010.5481635
Shuai Zhang, Guizhi Xu, Jianjun Zhang, Hongbin Wang, D. Geng, Xueqin Shen, Weili Yan, Fugui Liu, Xiaoguang Yang
Electrical impedance tomography (EIT) is a medical imaging technique in which an image of the conductivity or permittivity of part of the body is inferred from surface electrical measurements. In the paper an approach of a fast, real-time, three dimensional human lung's detection and imaging based on node back-projection algorithm with a 64 electrodes EIT system is introduced. The results shows that the system has the capability of reflection on impedance change of the thorax by the images reconstructed during one's breathing.
{"title":"Three dimensional detection and imaging for human lung based on node back-projection algorithm with a 64 electrodes EIT system","authors":"Shuai Zhang, Guizhi Xu, Jianjun Zhang, Hongbin Wang, D. Geng, Xueqin Shen, Weili Yan, Fugui Liu, Xiaoguang Yang","doi":"10.1109/CEFC.2010.5481635","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481635","url":null,"abstract":"Electrical impedance tomography (EIT) is a medical imaging technique in which an image of the conductivity or permittivity of part of the body is inferred from surface electrical measurements. In the paper an approach of a fast, real-time, three dimensional human lung's detection and imaging based on node back-projection algorithm with a 64 electrodes EIT system is introduced. The results shows that the system has the capability of reflection on impedance change of the thorax by the images reconstructed during one's breathing.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"12 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":"126378980","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.2010.5481534
S. Ikuno, N. Fujita, Susumu Yamamoto, S. Nakata
The Variable Preconditioned GVR (VPGCR) with mixed precision on Graphics Processing Unit (GPU) using Compute Unified Device Architecture (CUDA) is numerically investigated. The convergence theorem of VPGCR is guaranteed that the residual equation for the preconditioned procedure can be solved in the range of single precision operation. The results of computations show that VPGCR with mixed precision operation on GPU demonstrated significant achievement than that of CPU. Especially, VPGCR on GPU with mixed precision operation is 22.53 times faster than that of Central Processing Unit (CPU).
{"title":"Implementation of Variable Preconditioned GCR with mixed precision on GPU using CUDA","authors":"S. Ikuno, N. Fujita, Susumu Yamamoto, S. Nakata","doi":"10.1109/CEFC.2010.5481534","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481534","url":null,"abstract":"The Variable Preconditioned GVR (VPGCR) with mixed precision on Graphics Processing Unit (GPU) using Compute Unified Device Architecture (CUDA) is numerically investigated. The convergence theorem of VPGCR is guaranteed that the residual equation for the preconditioned procedure can be solved in the range of single precision operation. The results of computations show that VPGCR with mixed precision operation on GPU demonstrated significant achievement than that of CPU. Especially, VPGCR on GPU with mixed precision operation is 22.53 times faster than that of Central Processing Unit (CPU).","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":"128084991","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.2010.5481329
Chengde Tong, P. Zheng, Jing Zhao, Qian Wu
The compound-structure permanent-magnet synchronous machine (CS-PMSM), integrated by two electric machines, is a promising energy transducer for hybrid electric vehicles. The compound structure of CS-PMSM leads to a mechanical coupling problem, i.e. speed and torque of the two rotating shafts are correlated. Special rotor position detection and control are required. In this paper, a unified controller was investigated. Further experiments indicate the feasibility of the controller and the control strategy.
{"title":"Investigation of a unified controller of compound structure permanent-magnet synchronous machine for HEV applications","authors":"Chengde Tong, P. Zheng, Jing Zhao, Qian Wu","doi":"10.1109/CEFC.2010.5481329","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481329","url":null,"abstract":"The compound-structure permanent-magnet synchronous machine (CS-PMSM), integrated by two electric machines, is a promising energy transducer for hybrid electric vehicles. The compound structure of CS-PMSM leads to a mechanical coupling problem, i.e. speed and torque of the two rotating shafts are correlated. Special rotor position detection and control are required. In this paper, a unified controller was investigated. Further experiments indicate the feasibility of the controller and the control strategy.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"47 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":"115976346","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.2010.5481292
Li Weili, Yin Qiaoyu, Zhang Xiaochen
A new kind of quantum ant colony algorithm for continuous space optimization is proposed in this paper, by the introduction of quantum computation into ant colony optimization. Each ant carries a group of quantum bits representing the current location of ant, and quantum bits are updated by quantum rotation gates to make the location of ants changed, some quantum bits are mutated by quantum non-gates to increase the population diversity in this algorithm. The convergence of proposed algorithm is proved theoretically. The numerical simulation results show that the new algorithm has better global search capability and faster convergence rate than classical ant colony optimization. Furthermore, the new algorithm is applied to the optimal design of an induction motor successfully, and optimization results are obtained. An effective design method for induction motor has been suggested based on continuous quantum ant colony optimization.
{"title":"Calculation and analysis of electromagnetic in an induction motor based on continuous quantum ant colony optimization","authors":"Li Weili, Yin Qiaoyu, Zhang Xiaochen","doi":"10.1109/CEFC.2010.5481292","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481292","url":null,"abstract":"A new kind of quantum ant colony algorithm for continuous space optimization is proposed in this paper, by the introduction of quantum computation into ant colony optimization. Each ant carries a group of quantum bits representing the current location of ant, and quantum bits are updated by quantum rotation gates to make the location of ants changed, some quantum bits are mutated by quantum non-gates to increase the population diversity in this algorithm. The convergence of proposed algorithm is proved theoretically. The numerical simulation results show that the new algorithm has better global search capability and faster convergence rate than classical ant colony optimization. Furthermore, the new algorithm is applied to the optimal design of an induction motor successfully, and optimization results are obtained. An effective design method for induction motor has been suggested based on continuous quantum ant colony optimization.","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":"131362029","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.2010.5481509
A. Saitoh, N. Matsui, T. Itoh, A. Kamitani
The Element-Free Galerkin Method (EFGM) and the Boundary-Node Method (BNM) have been reformulated without integration cells. After a boundary is represented in terms of an implicit function, matrix elements are evaluated by use of the function. The results of computations show that the accuracy of the reformulated BNM is even higher than that of the dual-reciprocal boundary-element method.
{"title":"Development of two-dimensional meshless approaches without using integration cells","authors":"A. Saitoh, N. Matsui, T. Itoh, A. Kamitani","doi":"10.1109/CEFC.2010.5481509","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481509","url":null,"abstract":"The Element-Free Galerkin Method (EFGM) and the Boundary-Node Method (BNM) have been reformulated without integration cells. After a boundary is represented in terms of an implicit function, matrix elements are evaluated by use of the function. The results of computations show that the accuracy of the reformulated BNM is even higher than that of the dual-reciprocal boundary-element method.","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"15 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":"131938129","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.2010.5481425
Weili Li, Chengyu Song, Junci Cao, Liyi Li
An axial-radial flux type fully superconducting synchronous motor (ARFTFSSM) is presented, which will have important applications in ship propulsion system. First, 2D mathematics model of the radial flux type superconducting synchronous motor(without axial field coils ) is established at no load and load, the magnetic field distribution of the motor operating under rated speed (250r/min) is analyzed by use of 2D FEM. Then, at the same speed, changing the MMF of axial field coils, the variations of magnetic field and flux density in the air-gap of ARFTFSSM are analyzed by using 3D FEM. Furthermore, the experiments about the prototype are performed at no load. Both numerical calculation and experimental results show that the no-load flux density in the air gap can be increased about 8% than that of the only radial flux type superconducting synchronous motor under the same conditions. And the obtained conclusions are helpful for more study on large capacity fully superconducting synchronous motor.
{"title":"Numerical anlysis of axial-radial flux type fully superconducting synchronous motor","authors":"Weili Li, Chengyu Song, Junci Cao, Liyi Li","doi":"10.1109/CEFC.2010.5481425","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481425","url":null,"abstract":"An axial-radial flux type fully superconducting synchronous motor (ARFTFSSM) is presented, which will have important applications in ship propulsion system. First, 2D mathematics model of the radial flux type superconducting synchronous motor(without axial field coils ) is established at no load and load, the magnetic field distribution of the motor operating under rated speed (250r/min) is analyzed by use of 2D FEM. Then, at the same speed, changing the MMF of axial field coils, the variations of magnetic field and flux density in the air-gap of ARFTFSSM are analyzed by using 3D FEM. Furthermore, the experiments about the prototype are performed at no load. Both numerical calculation and experimental results show that the no-load flux density in the air gap can be increased about 8% than that of the only radial flux type superconducting synchronous motor under the same conditions. And the obtained conclusions are helpful for more study on large capacity fully superconducting synchronous motor.","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":"131211459","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.2010.5481065
Y. Okamoto, K. Fujiwara, Y. Ishihara, S. Sato
The nonconforming mesh connection technique is fairly effective for not only the analysis of electric machines with motion but also the reduction of the number of elements in a whole region of analysis. This paper describes the reduction method of computation scale by applying the nonconforming connection technique to the interface between the principal region including the electric machine and the outer space.
{"title":"Fast magnetic field analysis by applying nonconforming mesh connection technique to an outer region","authors":"Y. Okamoto, K. Fujiwara, Y. Ishihara, S. Sato","doi":"10.1109/CEFC.2010.5481065","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481065","url":null,"abstract":"The nonconforming mesh connection technique is fairly effective for not only the analysis of electric machines with motion but also the reduction of the number of elements in a whole region of analysis. This paper describes the reduction method of computation scale by applying the nonconforming connection technique to the interface between the principal region including the electric machine and the outer space.","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":"132200045","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.2010.5481663
W. Zhihua, Bowen Wang, Li Wang, Jiachun Deng, Weili Yan, Lei Guo
Induction coil is one of the key components of permanent magnet vibration-to-electrical power generator (VEPG). Here, the equivalent turn number of coil (ETNC) is introduced to build the relationship between the induction coil's structure and magnetic field. And the dynamic magnetic flux density is calculated by finite element method (FEM). The optimized induction coil is fabricated according to the calculating result. The peak-to-peak voltage and effective value voltage of the optimized coil increase up to 52.59% and 48.76%, respectively, compared with the uniform coil.
{"title":"Coil optimization design of permanent magnet vibration-to-electrical power generator","authors":"W. Zhihua, Bowen Wang, Li Wang, Jiachun Deng, Weili Yan, Lei Guo","doi":"10.1109/CEFC.2010.5481663","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481663","url":null,"abstract":"Induction coil is one of the key components of permanent magnet vibration-to-electrical power generator (VEPG). Here, the equivalent turn number of coil (ETNC) is introduced to build the relationship between the induction coil's structure and magnetic field. And the dynamic magnetic flux density is calculated by finite element method (FEM). The optimized induction coil is fabricated according to the calculating result. The peak-to-peak voltage and effective value voltage of the optimized coil increase up to 52.59% and 48.76%, respectively, compared with the uniform coil.","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":"132274729","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.2010.5481320
W. Fu, S. Ho
A novel low-speed axial-flux-modulated motor (AFMM) is presented. The proposed motor breaks the traditional design rule which stipulates that the pole-pair numbers of the stator and the rotor must be the same. It can be fit into the limited space such as the wheel rim of electric vehicles. Compared with those of radial-flux-modulated motor (RFMM), its manufacturing and assembling process are simple and easy. Its performance is compared with a RFMM by using 2-D and 3-D finite-element methods (FEM).
{"title":"A novel axial-flux electric machine for in-wheel gearless drive in plug-in hybrid electric vehicles","authors":"W. Fu, S. Ho","doi":"10.1109/CEFC.2010.5481320","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481320","url":null,"abstract":"A novel low-speed axial-flux-modulated motor (AFMM) is presented. The proposed motor breaks the traditional design rule which stipulates that the pole-pair numbers of the stator and the rotor must be the same. It can be fit into the limited space such as the wheel rim of electric vehicles. Compared with those of radial-flux-modulated motor (RFMM), its manufacturing and assembling process are simple and easy. Its performance is compared with a RFMM by using 2-D and 3-D finite-element methods (FEM).","PeriodicalId":148739,"journal":{"name":"Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation","volume":"5 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":"132765126","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.2010.5481801
Ik-Sang Jang, Wonho Kim, Jaenam Bae, Ju Lee
When we design the PM machines, accurate calculation of inductance parameters are very important. Inductance parameters have nonlinear characteristics along the magnet size, because of iron core is saturated by magnet flux and armature reaction flux. In this paper, we calculate inductance parameters by magnetic equivalent circuit method and finite element method. Moreover, we compensate the equation which is related to d-axis inductance of magnetic circuit method by using saturation coefficients. Finally, these coefficients are interpolated by the suggest method.
{"title":"Compensation of inductance parameters of Interior Permanent Magnet Synchronous Motors affected by magnet size","authors":"Ik-Sang Jang, Wonho Kim, Jaenam Bae, Ju Lee","doi":"10.1109/CEFC.2010.5481801","DOIUrl":"https://doi.org/10.1109/CEFC.2010.5481801","url":null,"abstract":"When we design the PM machines, accurate calculation of inductance parameters are very important. Inductance parameters have nonlinear characteristics along the magnet size, because of iron core is saturated by magnet flux and armature reaction flux. In this paper, we calculate inductance parameters by magnetic equivalent circuit method and finite element method. Moreover, we compensate the equation which is related to d-axis inductance of magnetic circuit method by using saturation coefficients. Finally, these coefficients are interpolated by the suggest method.","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":"133264871","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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