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2021 IEEE International Magnetic Conference (INTERMAG)最新文献

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Development of Linear Oscillatory Actuator with 4-poles and 8-poles Movers 四极和八极直线振荡驱动器的研制
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9580068
F. Kitayama, R. Kondo
{"title":"Development of Linear Oscillatory Actuator with 4-poles and 8-poles Movers","authors":"F. Kitayama, R. Kondo","doi":"10.1109/INTERMAG42984.2021.9580068","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9580068","url":null,"abstract":"Recently, inertia force generators with linear oscillatory actuators have been reported to reduce undesirable vibrations in automobiles and precision devices. In the IFG, a conventional actuator could effectively generate the inertia force for narrow frequency range because it has only one mover. The aim of this study is to widen the frequency range. Accordingly, we proposed a novel linear oscillatory actuator with 4-poles and 8-poles movers for inertia force generators. An even-even pole combination could significantly reduce the undesirable attractive force between the movers, through simple theoretical analysis, static electromagnetic analysis using finite element method, and measurements on a prototype. Moreover, the proposed LOA could effectively generate the inertia force at two different frequency ranges by switching the phase of the current, through dynamic analysis and measurements.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125950956","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
Optimum Design of the Eccentric Trapezoidal Magnetic Stimulation Coil Considering Stimulation Effect and Heat Dissipation 考虑激励效应和散热的偏心梯形磁激励线圈优化设计
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9579552
Xiaoliang Fang, Wei Liu, Yaoyao Luo, Chang Liu, Zhou He
{"title":"Optimum Design of the Eccentric Trapezoidal Magnetic Stimulation Coil Considering Stimulation Effect and Heat Dissipation","authors":"Xiaoliang Fang, Wei Liu, Yaoyao Luo, Chang Liu, Zhou He","doi":"10.1109/INTERMAG42984.2021.9579552","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9579552","url":null,"abstract":"To improve the magnetic stimulation effect, the eccentric trapezoidal magnetic coil (ETM coil) is designed based on the inspiration of special-shaped magnets. The proposed ETM coil consists of two identical coil units and each unit is in the shape of isosceles-trapezoid when projected onto the stimulated target plane. When two coil units are placed adjacent or overlapped, they are referred to as Type I-ETM coil and Type II-ETM coil, respectively. To limit the induced electromagnetic field within a smaller domain, the ETM coil is bent along the symmetrical axis at specific angles. Considering the overheating problem when repetitive stimulation is required, the ETM coil is wound with hollow copper wire and the central hollow part is used to circulate low-temperature deionized water. The finite element analysis method is adopted to obtain the 3D distributions of the induced electromagnetic field generated by ETM coil within the human brain and the internal cooling parameters design is carried out with coupled multi-physical field analysis. Results show that the ETM coil can produce the same stimulation intensity as the traditional FOE coil with less driving current, and it can also significantly improve the intracranial stimulation focalization and reduce the risk of side effects. Meanwhile, because of the internal cooling design, the temperature of the ETM coil could be maintained at room temperature after 3000 effective pulses were applied, while the temperature of the FOE coil exceeds the safe range. To verified our method, an anatomically realistic human head model with different electrical properties assigned to each tissue of the brain is employed in this paper. We also checked the maximum induced charge density on the targeted plane generated by the optimized coil to make sure that it will not cause any induced neurologic damage.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122856936","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
Analysis and Experimental Verification of Segmented Rotor Structure on Rotor Eddy Current Loss of High-Speed Surface-Mounted Permanent Magnet Machine 分段转子结构对高速表面贴装永磁电机转子涡流损耗的分析与实验验证
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9579793
W. Tong, M. Hou, Lu Sun, Shengnan Wu
{"title":"Analysis and Experimental Verification of Segmented Rotor Structure on Rotor Eddy Current Loss of High-Speed Surface-Mounted Permanent Magnet Machine","authors":"W. Tong, M. Hou, Lu Sun, Shengnan Wu","doi":"10.1109/INTERMAG42984.2021.9579793","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9579793","url":null,"abstract":"The rotor eddy current loss (RECL) is quite significant in the high-speed surface-mounted permanent magnet (PM) synchronous motor, and there are various ways to reduce the RECL. In this paper, the influence of four segmented rotor structures (axially segmented sleeve, circumferentially segmented PMs, axially segmented PMs, sleeve and PMs are segmented along the axial and circumferential directions respectively) on RECL is studied through three-dimensional finite element analysis (FEA). Based on this, the applicability of the rotor segmented structure to the RECL dissipation with different sleeve materials is further analyzed. Finally, the C-core experiment was used to verify the suppression effect of different segmented rotor structures on the RECL.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123341300","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
Experimental study of a hybrid bonding in ferromagnetic stacks for electrical machine applications 电机用铁磁堆杂化键合的实验研究
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9579505
A. Giraud, Maxime Nomdedeu, B. Nogarede
{"title":"Experimental study of a hybrid bonding in ferromagnetic stacks for electrical machine applications","authors":"A. Giraud, Maxime Nomdedeu, B. Nogarede","doi":"10.1109/INTERMAG42984.2021.9579505","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9579505","url":null,"abstract":"This paper reports on a study on the development of a hybrid bonding for electrical machine stacks. The hybrid bonding consists in an iron powder adding in the adhesive of the bonding layer of the stack. Two types of iron powder are used: the first is obtained with water atomization, the second with carbon monoxide reduction. Both types provide different properties. The two types of powder are loaded in the stack sample, which consists in a ring core. Characterization measurements are mainly iron losses and permeability measurements. Both powder types resulted in interesting performances, due to the magnetic permeability and potential thermal conductivity improvement. However, the preliminary results should be confirmed with a more detailed characterization, including reproducibility tests. Index Terms-Bonding, Electrical machine, Ferromagnetic steel sheets, Iron powder.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114900697","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
Performance Potential of High Gear Ratio Coaxial Magnetic Gears 高传动比同轴磁力齿轮的性能潜力
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9579919
Ho Yin David Wong, J. Bird
{"title":"Performance Potential of High Gear Ratio Coaxial Magnetic Gears","authors":"Ho Yin David Wong, J. Bird","doi":"10.1109/INTERMAG42984.2021.9579919","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9579919","url":null,"abstract":"It has been traditionally thought that a coaxial magnetic gear (MG) can only have a high volumetric torque density at a low gear ratio. This paper points out that by using the right sized radius and utilizing judicious radial parameter sweep analysis a high torque density can be created that also operates with a high gear ratio. An example design is presented that has a 33:1 gear ratio and a 3-D finite element analysis calculated torque density in excess of 300 Nm/L. The paper also provides a direct torque density comparison of the Halbach rotor MG relative to the surface mounted permanent magnet MG.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123951440","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: 3
A Study on Iterative Decoding by Neural Network Detector in SMR System SMR系统中神经网络检测器迭代译码的研究
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9579979
M. Nishikawa, Y. Nakamura, Y. Kanai, H. Osawa, Y. Okamoto
{"title":"A Study on Iterative Decoding by Neural Network Detector in SMR System","authors":"M. Nishikawa, Y. Nakamura, Y. Kanai, H. Osawa, Y. Okamoto","doi":"10.1109/INTERMAG42984.2021.9579979","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9579979","url":null,"abstract":"We study the low-density parity-check (LDPC) coding and iterative decoding system, as a signal processing system for the shingled magnetic recording (SMR) in two-dimensional magnetic recording (TDMR). Previously we reported that a waveform equalization using a two-dimensional finite impulse response (TD-FIR) filter or an inter-track interference (ITI) canceler reduced the influence of ITI. We also proposed a neural network detector (NND), and evaluated the performance of the first decoding by the NND. In this paper, we propose the NND which iteratively calculates the log-likelihood ratio (LLR) as the decoding reliability using the returned sum-product (SP) decoder output sequence in addition to the TD-FIR filter output sequence. Furthermore, we evaluate the performance of the iterative decoding system using an NND, and compare it to that of the system using a soft-output Viterbi algorithm (SOVA) detector with the signal-dependent noise predictor.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124717151","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
Optimized magnetic hysteresis management in numerical electromagnetic field simulations 电磁场数值模拟中磁滞管理的优化
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9580043
P. Fagan, B. Ducharne, A. Skarlatos
{"title":"Optimized magnetic hysteresis management in numerical electromagnetic field simulations","authors":"P. Fagan, B. Ducharne, A. Skarlatos","doi":"10.1109/INTERMAG42984.2021.9580043","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9580043","url":null,"abstract":"The treatment of hysteresis in numerical simulations represents major issues as large computational times and significant memory space allocations are required. The memory management of the Jiles-Atherton model is simple, but its integration requires relatively fine temporal discretization to achieve convergence. Oppositely, the Preisach model gives satisfactory results with a coarser temporal grid but requires vast memory space and complex management. The Derivative Static Hysteresis Model (DSHM) is an alternative solution for improved performances. The hysteresis law is considered in a generalized input vector space. An interpolation matrix is constructed with the columns and rows denoting the discrete values of H and $B$ and whose terms stand for the dB/dH slope at the corresponding point. Up to now, the filling step of the DSHM matrix has always been through experimental first-order reversal curves, but getting such experimental data is always complex. In this study, we propose to fill the DSHM matrix alternatively. We use simulated first-order reversal curves obtained from the Jiles-Atherton or the Preisach model, which have been identified using limited experimental data (the first magnetization curve and the major hysteresis cycle).","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128566775","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
Magnetotransport Phenomena in Topological Insulator / Superconductor Bi2 Te3/Nb Bilayer and Trilayer Thin Films 拓扑绝缘体/超导体bi2te3 /Nb双层和三层薄膜中的磁输运现象
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9579518
A. Pilidi, T. Speliotis, G. Litsardakis
{"title":"Magnetotransport Phenomena in Topological Insulator / Superconductor Bi2 Te3/Nb Bilayer and Trilayer Thin Films","authors":"A. Pilidi, T. Speliotis, G. Litsardakis","doi":"10.1109/INTERMAG42984.2021.9579518","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9579518","url":null,"abstract":"Bi2Te3 is a three-dimensional topological insulator, whose surface exhibits metallic electronic states, while its bulk is effectively free of mobile charge carriers. These states are formed by topological effects that also render the electrons travelling on such surfaces insensitive to scattering by impurities. Such topological insulators combined with a superconductor may provide new routes to the study of transport through their unconventional surface states. Here, we show transport experiments on Bi2Te3/Nb bilayer and Nb/Bi2Te3/Nb trilayer, a system which is important to investigate the appearance of the predicted Majorana states at the interface between a topological insulator and a superconductor. Interestingly, with the measurements at 3 K we observe that the onset of superconductivity of Nb layer, that is adjacent to the topological insulator, creates novel phenomena that arise from the interplay between a superconductor and a topological insulator with a superconducting state at the surfaces of Bi2Te3. Our results show that Bi2Te3 is a promising material system to get a better understanding of the superconducting proximity effect in topological surface states, and to examine the appearance of zero-energy Majorana states in transport experiments.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125526598","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
A surrogate model assisted with a subdomain model for surface-mounted permanent-magnet machine 表面贴装永磁电机的代理模型辅助子域模型
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/INTERMAG42984.2021.9579877
Chentao Tang, Youtong Fang, P. Pfister
{"title":"A surrogate model assisted with a subdomain model for surface-mounted permanent-magnet machine","authors":"Chentao Tang, Youtong Fang, P. Pfister","doi":"10.1109/INTERMAG42984.2021.9579877","DOIUrl":"https://doi.org/10.1109/INTERMAG42984.2021.9579877","url":null,"abstract":"Linear subdomain analytical models allow general modeling of permanent-magnet (PM) motors, but fail to model the magnetic saturation effect well. On the other hand, surrogate models allow precise modeling of saturation. However, the bottleneck of the traditional surrogate model is the size of the training dataset because of the large design parameters space of PM motors. This paper provides a surrogate model assisted with a subdomain model (SMASM). It has the advantage of the precision of the surrogate model and generality of the subdomain model. The SMASM can reduce the size of the training dataset tremendously (from 1000k to 0.6k), by motor scaling and dividing the training dataset into linear and nonlinear parts. Compared to the subdomain model, the SMASM has a similar speed and higher precision when the motor works at a high saturation level. 2187 motors were tested. The average errors of the subdomain model and SMASM are about 24.3% and 0.4%, respectively. Their maximum errors are about 46.0% and 2.9%, respectively.","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116644884","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
The International Magnetics Conference (INTERMAG) 2021 Publications Committee 国际磁学会议(INTERMAG) 2021出版委员会
2021 IEEE International Magnetic Conference (INTERMAG) Pub Date : 2021-04-01 DOI: 10.1109/intermag42984.2021.9579771
{"title":"The International Magnetics Conference (INTERMAG) 2021 Publications Committee","authors":"","doi":"10.1109/intermag42984.2021.9579771","DOIUrl":"https://doi.org/10.1109/intermag42984.2021.9579771","url":null,"abstract":"","PeriodicalId":129905,"journal":{"name":"2021 IEEE International Magnetic Conference (INTERMAG)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115016695","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
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