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IEEE Transactions on Magnetics最新文献

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MAG-Vision: A Vision Transformer Backbone for Magnetic Material Modeling 磁性材料建模的视觉变压器主干
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2025-01-09 DOI: 10.1109/TMAG.2025.3527486
Rui Zhang;Lei Shen
{"title":"MAG-Vision: A Vision Transformer Backbone for Magnetic Material Modeling","authors":"Rui Zhang;Lei Shen","doi":"10.1109/TMAG.2025.3527486","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3527486","url":null,"abstract":"The neural network-based method for modeling magnetic materials enables the estimation of hysteresis B-H loop and core loss across a wide operation range. Transformers are neural networks widely used in sequence-to-sequence tasks. The classical Transformer modeling method suffers from high per-layer complexity and long recurrent inference time when dealing with long sequences. While down-sampling methods can mitigate these issues, they often sacrifice modeling accuracy. In this study, we propose MAG-Vision, which employs a vision Transformer (ViT) as the backbone for magnetic material modeling. It can shorten waveform sequences with minimal loss of information. We trained the network using the open-source magnetic core loss dataset MagNet. Experimental results demonstrate that MAG-Vision performs well in estimating hysteresis B-H loop and magnetic core losses. The average relative error of magnetic core losses for most materials is less than 2%. Experiments are designed to compare MAG-Vision with different network structures to validate its advantages in accuracy, training speed, and inference time.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 3","pages":"1-6"},"PeriodicalIF":2.1,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation Study of High-Gradient Magnetic Chromatography 高梯度磁色谱的模拟研究
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2025-01-08 DOI: 10.1109/TMAG.2025.3526872
Petru Andrei;Nicholas Carlstedt
{"title":"Simulation Study of High-Gradient Magnetic Chromatography","authors":"Petru Andrei;Nicholas Carlstedt","doi":"10.1109/TMAG.2025.3526872","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3526872","url":null,"abstract":"High-gradient magnetic chromatography (HGMC) is a technique for selectively separating magnetic particles (MPs) according to their magnetic susceptibilities. We develop a mathematical model for HGMC that includes the effects of magnetic force, Brownian motion, gravity, and viscous drag. We then use this model to interpret recently reported experimental results and to distinguish these efforts from other work on high-gradient magnetic separation (HGMS) in the literature. Special emphasis is given to analyzing the main limitations of HGMC with regards to particle size and magnetic susceptibility. Our simulations show that HGMC can separate paramagnetic particles with magnetic susceptibilities as low as <inline-formula> <tex-math>$10^{-4}$ </tex-math></inline-formula> to <inline-formula> <tex-math>$10^{-3}$ </tex-math></inline-formula> and diameters down to a few tens of nanometers. Finally, we propose and discuss various alternative HGMC designs.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 2","pages":"1-10"},"PeriodicalIF":2.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10833827","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling of Hot Deformation Behavior of the Nd-Fe-B Permanent Magnet and Its Application in Forming of Magnetic Ring Nd-Fe-B永磁体热变形行为建模及其在磁环成形中的应用
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2025-01-08 DOI: 10.1109/TMAG.2025.3527030
Junyou Yang;Jun Li;Shaoxun Liu;Tao Liu;Lei Zhou;Xinghua Cheng;Xiaodong Li;Shuzhou Yu;Ying Chang;Xiaojun Yu;Bo Li
{"title":"Modeling of Hot Deformation Behavior of the Nd-Fe-B Permanent Magnet and Its Application in Forming of Magnetic Ring","authors":"Junyou Yang;Jun Li;Shaoxun Liu;Tao Liu;Lei Zhou;Xinghua Cheng;Xiaodong Li;Shuzhou Yu;Ying Chang;Xiaojun Yu;Bo Li","doi":"10.1109/TMAG.2025.3527030","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3527030","url":null,"abstract":"Hot-deformed (HD) Nd-Fe-B magnet exhibits good magnetic and mechanical properties, which are dictated by the thermomechanical behavior of the feedstock during the hot deformation process. To enhance the HD magnet properties, the hot deformation behavior of the Nd-Fe-B material must be well understood and an accurate model of the process must be established and validated. In this work, the hot deformation behaviors of the Nd-Fe-B magnet were studied by experiments and simulations. Experiments were conducted using a thermomechanical simulator at temperatures ranging from 740 °C to 820 °C and the strain rates between 0.001 and 0.05 s−1. Results indicated that the flow stress was significantly affected by strain, temperature, and strain rate. Therefore, a modified constitutive model was developed to incorporate the effects of these three factors. The model achieved a correlation coefficient of 0.991, and further was implemented for the simulation of the forming processes. The simulated results matched the experimental ones very well. Furthermore, microstructural analysis and magnetic properties results showed the microstructure and magnetic properties were sensitive to temperature and strain rate, similar to the effective strain. Finally, the modified model was used to simulate the backward-extruded (BE) process for magnetic rings with high precision, verifying the applicability of the modified constitutive model. The method combining experiments, simulation, and microstructural analysis provides an efficient tool for obtaining high-performance HD magnets and designing process routes in engineering.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 3","pages":"1-13"},"PeriodicalIF":2.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nondestructive Ferromagnetic Resonance Measurements Validate the Efficacy of a Seed Layer in Cobalt Magnetic Nanowire Fabrication 非破坏性铁磁共振测量验证种子层在钴磁性纳米线制造中的有效性
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2025-01-08 DOI: 10.1109/TMAG.2025.3527341
Allison Harpel;Md Toaha Anas;Alex Wege;Rhonda R. Franklin;Bethanie J. H. Stadler
{"title":"Nondestructive Ferromagnetic Resonance Measurements Validate the Efficacy of a Seed Layer in Cobalt Magnetic Nanowire Fabrication","authors":"Allison Harpel;Md Toaha Anas;Alex Wege;Rhonda R. Franklin;Bethanie J. H. Stadler","doi":"10.1109/TMAG.2025.3527341","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3527341","url":null,"abstract":"Magnetic nanowires (MNWs) have been proposed for use in numerous applications due to their tunability and scale, but due to the same tunability that makes MNWs so versatile, tight quality control is needed to make the transition from research labs to industry. Currently, template-assisted electrodeposition is a promising fabrication method, but there is no quick, low-cost method to effectively quantify the fill factor (FF) of the templated wires. Here, we evaluate the efficacy of a copper seed layer to fabricate cobalt MNWs using quantitative ferromagnetic resonance (FMR). The deposition quality is assessed by FF and saturation magnetization (MS). First, the quality is evaluated by common, qualitative, or semiquantitative methods, which are then compared to the quantitative values measured from FMR. The copper seed layer is demonstrated to improve FF while maintaining MNW quality. For the seeded sample, FMR measured FF at 12.3% <inline-formula> <tex-math>$pm ~0.4$ </tex-math></inline-formula>%, with an MNW MS of <inline-formula> <tex-math>$1.64~pm ~0.10$ </tex-math></inline-formula> T. For the sample without a seed, FMR measured FF at 9.0% <inline-formula> <tex-math>$pm ~0.4$ </tex-math></inline-formula>% with an MNW MS of <inline-formula> <tex-math>$1.62~pm ~0.13$ </tex-math></inline-formula> T. These quantitative measurements were corroborated by all the qualitative and semiquantitative results, indicating that nondestructive FMR is a viable method to quantify FF and quickly evaluate the quality of templated MNWs.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 3","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10833744","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling Torques in Systems With Spin-Orbit Coupling 自旋-轨道耦合系统的转矩建模
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2025-01-03 DOI: 10.1109/TMAG.2025.3525810
Nils Petter Jørstad;Wolfgang Goes;Siegfried Selberherr;Viktor Sverdlov
{"title":"Modeling Torques in Systems With Spin-Orbit Coupling","authors":"Nils Petter Jørstad;Wolfgang Goes;Siegfried Selberherr;Viktor Sverdlov","doi":"10.1109/TMAG.2025.3525810","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3525810","url":null,"abstract":"We generalize the description of transport in ferromagnetic (FM) systems using a coupled spin and charge drift-diffusion approach to account for the spin-orbit torques (SOTs) acting on the magnetization. We consider both bulk and interfacial spin-orbit coupling (SOC) and treat the transverse spin transport in the bulk of ferromagnets. We compare our approach with the typical assumption that the transverse spin currents are instantaneously absorbed in the ferromagnet. Furthermore, we investigate the effects of a strong interfacial Rashba SOC on the thickness and angular dependence of the torques, and we demonstrate its importance in capturing the behavior reported by experiments in the literature.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 6","pages":"1-4"},"PeriodicalIF":2.1,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10824858","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electromagnetic Field Analysis and Diagnosis of Rotor Demagnetization and Eccentricity Faults in SPMSM 永磁同步电动机转子退磁和偏心故障的电磁场分析与诊断
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2024-12-31 DOI: 10.1109/TMAG.2024.3524638
Xian Li;Xiuhe Wang;Wenliang Zhao
{"title":"Electromagnetic Field Analysis and Diagnosis of Rotor Demagnetization and Eccentricity Faults in SPMSM","authors":"Xian Li;Xiuhe Wang;Wenliang Zhao","doi":"10.1109/TMAG.2024.3524638","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3524638","url":null,"abstract":"Aiming at the common faults of demagnetization and rotor eccentricity (RE) in permanent magnet (PM) synchronous motor, the electromagnetic field analysis under the faults and a nonintrusive fault diagnosis and localization technique are investigated in this article. Initially, a PM segmentation model is developed, and a general solution is derived for surface-mounted PM motor with local irreversible demagnetization fault (LIDF) accounting for core saturation, which can precisely simulate LIDF in arbitrary regions. Additionally, an equivalent transformation method is introduced to emulate the nonuniform magnetic field arising from RE. The validity and correctness of the proposed models are confirmed by finite element analysis and experiments. Furthermore, the effects caused by the faults on the no-load electromagnetic performance are analyzed, based on which a diagnosis technique for rotor faults using coil BEMF (CBEMF) is proposed. The localization of the LIDF is achieved by integration with the least square method, and the eccentric angle and ratio are determined by combining with a deep neural network (DNN). Overall, the proposed model can provide an important reference for rotor failure risk assessment, fault-tolerant optimization, and maintenance strategy.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 3","pages":"1-13"},"PeriodicalIF":2.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Honeycomb Halbach Flexible Permanent Magnet Array for Magnetically Levitated Planar Motor 用于磁悬浮平面电机的蜂窝状Halbach柔性永磁阵列
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2024-12-31 DOI: 10.1109/TMAG.2024.3524600
Xuyang Yu;Enshuo Liu;Chunguang Fan;Bo Zhao;Jiubin Tan
{"title":"Honeycomb Halbach Flexible Permanent Magnet Array for Magnetically Levitated Planar Motor","authors":"Xuyang Yu;Enshuo Liu;Chunguang Fan;Bo Zhao;Jiubin Tan","doi":"10.1109/TMAG.2024.3524600","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3524600","url":null,"abstract":"Based on the prototype Halbach planar magnet array (HPMA), a honeycomb Halbach flexible permanent magnet array (HHFA) is proposed in this article. HHFA can effectively optimize the magnetic field distribution, increase the magnetic field strength, and reduce the magnetic field distortion. The magnetic flux density distribution for HHFA was obtained through a numerical analytical approach. The simulation and comparative analysis show that the intensity amplitude of the magnetic field generated by HHFA is 23% higher than that of HPMA, and the periodic distortion rate, amplitude fluctuation of the magnetic field, and harmonic distortion of HHFA are optimized compared with HPMA. The simulation results demonstrate that magnetically levitated planar motor (MLPM) employing HHFA exhibits superior electromagnetic thrust coefficient and electromagnetic force stability compared to MLPM utilizing HPMA.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 2","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEEE Transactions on Magnetics Institutional Listings 《IEEE磁学汇刊》
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2024-12-30 DOI: 10.1109/TMAG.2024.3520459
{"title":"IEEE Transactions on Magnetics Institutional Listings","authors":"","doi":"10.1109/TMAG.2024.3520459","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3520459","url":null,"abstract":"","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"C4-C4"},"PeriodicalIF":2.1,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10817830","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
TechRxiv: Share Your Preprint Research with the World! techxiv：与世界分享你的预印本研究！
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2024-12-30 DOI: 10.1109/TMAG.2024.3523753
{"title":"TechRxiv: Share Your Preprint Research with the World!","authors":"","doi":"10.1109/TMAG.2024.3523753","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3523753","url":null,"abstract":"","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"1-1"},"PeriodicalIF":2.1,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10817829","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Member Get-A-Member (MGM) Program 米高梅会员入会计划
IF 2.1 3区 工程技术
IEEE Transactions on Magnetics Pub Date : 2024-12-30 DOI: 10.1109/TMAG.2024.3523768
{"title":"Member Get-A-Member (MGM) Program","authors":"","doi":"10.1109/TMAG.2024.3523768","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3523768","url":null,"abstract":"","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"1-1"},"PeriodicalIF":2.1,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10818381","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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