Pub Date : 2009-10-30DOI: 10.1109/ASEMD.2009.5306626
C. Sorrell, J. Rider, J. Roh, K. Notlen-Read, J. Dave
A number of commercial bulk graphites has been assessed in terms of a range of properties. The graphites include pyrolytic, nuclear, electrode, mechanical, extruded, and isostatically pressed. The quantitative properties examined, some of which were determined along and across the grain, include bulk density, apparent porosity, electrical resistivity, flexural strength, and Knoop microhardness. The comparative properties examined include microstructure, pin-on-disk wear loss, amount of amorphous carbon, degree of alignment, and degree of anisotropy.
{"title":"Comparison of commercial bulk graphites","authors":"C. Sorrell, J. Rider, J. Roh, K. Notlen-Read, J. Dave","doi":"10.1109/ASEMD.2009.5306626","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306626","url":null,"abstract":"A number of commercial bulk graphites has been assessed in terms of a range of properties. The graphites include pyrolytic, nuclear, electrode, mechanical, extruded, and isostatically pressed. The quantitative properties examined, some of which were determined along and across the grain, include bulk density, apparent porosity, electrical resistivity, flexural strength, and Knoop microhardness. The comparative properties examined include microstructure, pin-on-disk wear loss, amount of amorphous carbon, degree of alignment, and degree of anisotropy.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128271997","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306628
F. Shang, Wanping Wu
This paper introduces the single feedpoint circularly polarized microstrip patch antenna design and analysis based on the cavity mode theory, with several relevant simulations and practical test results presented to verify the proposed design.
{"title":"Emitting antenna techniques based on BeiDou navigation positioning system","authors":"F. Shang, Wanping Wu","doi":"10.1109/ASEMD.2009.5306628","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306628","url":null,"abstract":"This paper introduces the single feedpoint circularly polarized microstrip patch antenna design and analysis based on the cavity mode theory, with several relevant simulations and practical test results presented to verify the proposed design.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129337834","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306640
X. Pang
The macroscopic quantum phenomena of proximity effect and Josephson Effect in superconductive junctions are studied by nonlinear quantum mechanical method, its Josephson current is obtained.
用非线性量子力学方法研究了超导结中邻近效应和约瑟夫森效应的宏观量子现象，得到了其约瑟夫森电流。
{"title":"Nolinear quantum theory of macroscopic quantum effects appeared in inhomogeneous superconductive junctions","authors":"X. Pang","doi":"10.1109/ASEMD.2009.5306640","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306640","url":null,"abstract":"The macroscopic quantum phenomena of proximity effect and Josephson Effect in superconductive junctions are studied by nonlinear quantum mechanical method, its Josephson current is obtained.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123102000","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306670
Youguang Guo, Jianguo Zhu, Haiyan Lu, Yi Wang, J. Jin
This paper presents the development of a permanent magnet motor with soft magnetic composite (SMC) stator core for driving a dishwasher pump. The unique properties of the SMC, such as 3D magnetic isotropy and molding production technique, have been taken into account in the design. 3D magnetic field finite element analysis is carried out to accurately compute the motor parameters and an equivalent electrical circuit is derived to predict the motor performance. Analysis results show that the developed motor is appropriate.
{"title":"Design and analysis of a permanent magnet motor with SMC core for driving dishwasher pump","authors":"Youguang Guo, Jianguo Zhu, Haiyan Lu, Yi Wang, J. Jin","doi":"10.1109/ASEMD.2009.5306670","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306670","url":null,"abstract":"This paper presents the development of a permanent magnet motor with soft magnetic composite (SMC) stator core for driving a dishwasher pump. The unique properties of the SMC, such as 3D magnetic isotropy and molding production technique, have been taken into account in the design. 3D magnetic field finite element analysis is carried out to accurately compute the motor parameters and an equivalent electrical circuit is derived to predict the motor performance. Analysis results show that the developed motor is appropriate.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"244 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115186479","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306659
S. Dong, Zhongbo Zhu, Ying Wang
Many terahertz systems have been put forward and some of them even find ways in space. Radio astronomy is the most prospective domain where terahertz SIS detectors are employed. Fundamental of SIS is introduced and the detection system is overviewed. Some typical systems are depicted working in space with special requirements.
{"title":"Terahertz SIS detectors for space applications","authors":"S. Dong, Zhongbo Zhu, Ying Wang","doi":"10.1109/ASEMD.2009.5306659","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306659","url":null,"abstract":"Many terahertz systems have been put forward and some of them even find ways in space. Radio astronomy is the most prospective domain where terahertz SIS detectors are employed. Fundamental of SIS is introduced and the detection system is overviewed. Some typical systems are depicted working in space with special requirements.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115431896","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306625
Shuliang Liu, Zhi-zhou Yin
In this paper, we use Particle Swarm Optimization with Support Vector Machine Optimized to evaluate the Investment risk of electrical project. A hybrid intelligent system is applied to Evaluation of electrical equipment, combining Particle Swarm Optimize Algorithm (PSO) and Support Vector Machines (SVM). At first, we can make use of PSO obtaining appropriate parameters in order to improve the general recognizing ability of SVM. And then, these parameters are used to develop classification rules and train SVM. The effectiveness of our methodology was verified by experiments comparing BP neural networks with our approach.
{"title":"Evaluating the investment risk of electrical project based on particle swarm optimization with support vector machine optimized","authors":"Shuliang Liu, Zhi-zhou Yin","doi":"10.1109/ASEMD.2009.5306625","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306625","url":null,"abstract":"In this paper, we use Particle Swarm Optimization with Support Vector Machine Optimized to evaluate the Investment risk of electrical project. A hybrid intelligent system is applied to Evaluation of electrical equipment, combining Particle Swarm Optimize Algorithm (PSO) and Support Vector Machines (SVM). At first, we can make use of PSO obtaining appropriate parameters in order to improve the general recognizing ability of SVM. And then, these parameters are used to develop classification rules and train SVM. The effectiveness of our methodology was verified by experiments comparing BP neural networks with our approach.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132544503","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306644
T. Dai, Yuejin Tang, Jing Shi, Likui Wang, Xupeng Fang
We perform thermal analysis in order to understand the thermal behavior of the HTS magnet and improve the thermal stability of the HTS magnet for simulated dynamic experiment of electric power systems. In this paper, the thermal analysis and recovery characteristics in over-current state are analyzed by using the model based on the heat conduction equation and solved using the finite element methods. The magnet was cooled by a cryocooler through a cooling plate. This study focused on the temperature profile in the magnet and the heat transfer between the magnet and the cooling plate. Based on the results, the issues related to thermal stability of the HTS magnet are discussed.
{"title":"Thermal analysis of the HTS magnet for simulated dynamic experiment of electric power systems in over-current state","authors":"T. Dai, Yuejin Tang, Jing Shi, Likui Wang, Xupeng Fang","doi":"10.1109/ASEMD.2009.5306644","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306644","url":null,"abstract":"We perform thermal analysis in order to understand the thermal behavior of the HTS magnet and improve the thermal stability of the HTS magnet for simulated dynamic experiment of electric power systems. In this paper, the thermal analysis and recovery characteristics in over-current state are analyzed by using the model based on the heat conduction equation and solved using the finite element methods. The magnet was cooled by a cryocooler through a cooling plate. This study focused on the temperature profile in the magnet and the heat transfer between the magnet and the cooling plate. Based on the results, the issues related to thermal stability of the HTS magnet are discussed.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132672870","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306616
G. Xue, Xiaotao Zhang, Huaiwu Zhang
Magnetically suspended gyroscope is an inertial orientation sensor which can be used both as an accelerometer and as an angle sensor. Unlike a conventional mechanical gyroscope, the rotor of this kind of gyroscope is suspended and spun by magnetic forces. The elimination of mechanical friction provides the gyroscope with improved accuracy and stability. This paper mainly focuses on the magnetic design of the gyroscope and discusses how the magnetic field affects the function of the gyroscope. Position sensors were employed in the gyroscope to measure the rotation and precession of the rotor. Both angular rate and acceleration were measured by inductive sensors to optimize the design of the suspension system and the rotation system.
{"title":"Electromagnetic design of a magnetically suspended gyroscope prototype","authors":"G. Xue, Xiaotao Zhang, Huaiwu Zhang","doi":"10.1109/ASEMD.2009.5306616","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306616","url":null,"abstract":"Magnetically suspended gyroscope is an inertial orientation sensor which can be used both as an accelerometer and as an angle sensor. Unlike a conventional mechanical gyroscope, the rotor of this kind of gyroscope is suspended and spun by magnetic forces. The elimination of mechanical friction provides the gyroscope with improved accuracy and stability. This paper mainly focuses on the magnetic design of the gyroscope and discusses how the magnetic field affects the function of the gyroscope. Position sensors were employed in the gyroscope to measure the rotation and precession of the rotor. Both angular rate and acceleration were measured by inductive sensors to optimize the design of the suspension system and the rotation system.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131635757","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306629
Fengge Zhang, Yu Liu, Haijun Bai
This paper reports the design, performance analysis, and prototype experiment of a three-dimensional (3D) flux permanent magnet claw-pole motor (PMCPM), which has claws in the stator and the out rotor with Permanent Magnet, and the claws are made of Soft Magnetic Composites (SMC). The effect of the number of poles, main dimensions, magnet material and dimensions and claw angle on the motor's performance has been investigated. And also predicted torque density and power factor under various pole numbers conditions are compared with those derived form finite element analysis and measurements.
{"title":"Study and design of 3-D flux permanent magnet claw-pole motor with SMC stator","authors":"Fengge Zhang, Yu Liu, Haijun Bai","doi":"10.1109/ASEMD.2009.5306629","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306629","url":null,"abstract":"This paper reports the design, performance analysis, and prototype experiment of a three-dimensional (3D) flux permanent magnet claw-pole motor (PMCPM), which has claws in the stator and the out rotor with Permanent Magnet, and the claws are made of Soft Magnetic Composites (SMC). The effect of the number of poles, main dimensions, magnet material and dimensions and claw angle on the motor's performance has been investigated. And also predicted torque density and power factor under various pole numbers conditions are compared with those derived form finite element analysis and measurements.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131714936","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306698
T. Dai, M. Cao, Jing Shi, Likui Wang
The induction motor is commonly operated at variable voltage and variable frequency state at present. The broken rotor bars fault is one common fault in the operation state. The electromagnetic and thermal characteristics of induction motor in broken rotor bar condition are very important fault characteristics. The electromagnetic field of induction motor at fault is analyzed by finite element method. Based on the results above, the temperature distribution and temperature rise of induction motor is analyzed in different broken rotor bar and typical area with maximal temperature rise is investigated too. At last, fault characteristics at broken rotor bar are obtained as a criterion for fault diagnosis.
{"title":"Study on characteristics of variable voltage and variable frequency motor with broken rotor bars","authors":"T. Dai, M. Cao, Jing Shi, Likui Wang","doi":"10.1109/ASEMD.2009.5306698","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306698","url":null,"abstract":"The induction motor is commonly operated at variable voltage and variable frequency state at present. The broken rotor bars fault is one common fault in the operation state. The electromagnetic and thermal characteristics of induction motor in broken rotor bar condition are very important fault characteristics. The electromagnetic field of induction motor at fault is analyzed by finite element method. Based on the results above, the temperature distribution and temperature rise of induction motor is analyzed in different broken rotor bar and typical area with maximal temperature rise is investigated too. At last, fault characteristics at broken rotor bar are obtained as a criterion for fault diagnosis.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127548618","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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