IEEE Transactions on Magnetics最新文献_第9页

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 : 2025-03-28 DOI: 10.1109/TMAG.2025.3570308

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Correlation Between Temperature and Domain State Configuration in Fe2CoGe Thin Film Fe2CoGe薄膜中温度与畴态结构的关系

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-27 DOI: 10.1109/TMAG.2025.3555522

Rajesh Kumar Roul;Bongurala Prakash;S. Narayana Jammalamadaka

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Inclining-Interface Connected Integrated-Parallel-Magnetization Trapezoidal-Magnetic-Pole Combination BPMSM and Its Magnetic Field Analytical Calculation 倾斜接口连接集成并联磁化梯形磁极组合永磁同步电机及其磁场解析计算

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-27 DOI: 10.1109/TMAG.2025.3574067

Wenshao Bu;Jinghui Zhang;Zongang Fan

{"title":"Inclining-Interface Connected Integrated-Parallel-Magnetization Trapezoidal-Magnetic-Pole Combination BPMSM and Its Magnetic Field Analytical Calculation","authors":"Wenshao Bu;Jinghui Zhang;Zongang Fan","doi":"10.1109/TMAG.2025.3574067","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3574067","url":null,"abstract":"For the bearingless permanent magnet synchronous motor (BPMSM), to improve the sinusoidal degree of air-gap magnetic field, and solve the problem of difficulty in solving the air-gap magnetic field, a novel structure of Inclining-interface Connected Trapezoidal-Magnetic-Pole Combination with integrated Parallel Magnetization (ICTMPC-PM) is proposed, and for the BPMSM with ICTMPC-PMs, the analytical calculation model of the no-load air-gap magnetic field is studied under the consideration of the rotor eccentricity. First, the analytical equation of air-gap flux density for the slotless BPMSM with ICTMPC-PMs is obtained by solving Laplace’s and Poisson’s equations in each subdomain. Then, combining the relative permeability function, the analytical equations of radial air-gap flux density are further solved for the slotted BPMSM with ICTMPC-PMs. Subsequently, combining with the equivalent air-gap function and under the consideration of the radial eccentricity of the bearingless rotor, the analytical equations of radial air-gap flux density are achieved. Finally, through the finite element method (FEM), the characteristic comparison of the no-load air-gap magnetic field and the validation of the analytical calculation model for a BPMSM with ICTMPC-PMs are conducted. From the research results, the BPMSM structure with ICTMPC-PMs can significantly reduce the low-order harmonics of the air-gap magnetic field, such as the third, fifth, and seventh harmonics, thereby significantly improve the sinusoidal degree of the air-gap magnetic flux density waveform; The established analytical calculation model of air-gap magnetic field for the BPMSM with ICTMPC-PMs is effective and has a high accuracy.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 7","pages":"1-10"},"PeriodicalIF":2.1,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536470","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 Magnetics Society Information IEEE磁学学会信息

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-26 DOI: 10.1109/TMAG.2025.3550293

引用次数: 0

Development of a Dual-Spring Linear Resonant Actuator for Improved Haptic Performance 提高触觉性能的双弹簧线性谐振驱动器的研制

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-26 DOI: 10.1109/TMAG.2025.3554743

Kyeongtak Park;Younghun Jeong;Danping Xu;Sangmoon Hwang

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IEEE Transactions on Magnetics Publication Information IEEE电磁学学报出版信息

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-26 DOI: 10.1109/TMAG.2025.3550294

引用次数: 0

A Field-Superposition Model for Fast Electromagnetic Performance Prediction of PM Machine With Irregular Magnets and Irons 一种用于不规则磁铁永磁机械电磁性能快速预测的场叠加模型

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-26 DOI: 10.1109/TMAG.2025.3573334

Pengjie Xiang;Liang Yan;Xiaoshuai Liu;Xinyi Li;Xinghua He;Wei Hua;Cungang Hu

{"title":"A Field-Superposition Model for Fast Electromagnetic Performance Prediction of PM Machine With Irregular Magnets and Irons","authors":"Pengjie Xiang;Liang Yan;Xiaoshuai Liu;Xinyi Li;Xinghua He;Wei Hua;Cungang Hu","doi":"10.1109/TMAG.2025.3573334","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3573334","url":null,"abstract":"Accurate and fast prediction of air-gap magnetic field is critical for the design and optimization of spoke-type permanent-magnet (PM) machines especially those with high slot/pole number and irregular-shaped magnets. Conventional field-superposition analytical model is a fast computation method for electromagnetic performance prediction of PM machines; however, it cannot be directly used in the spoke-type PM machines with irregular magnets and interpolar irons. In this article, an improved field-superposition method based on segmented virtual domains (SVDs) is proposed to achieve high-precision and fast magnetic field prediction of the spoke-type PM machine accounting for irregular magnets and interpolar irons. The number of domains requiring modeling can be reduced effectively to save computation time, and the inter-layer magnetic resistance of the interpolar iron can be taken account for high precision by the improved field-superposition method. First, the schematic of one spoke-type PM machine with quasi-trapezoidal magnet and quasi-triangular iron is presented, and the major features of the proposed analytical modeling method are discussed and compared with conventional superposition method. Second, by taking advantage of the segmented virtual-domain method along with half-range Fourier series expansion, the open-circuit air-gap field with and without stator slots, the back electromotive force, and the torque output of the electric machine are formulated mathematically. Finally, the finite-element method is conducted on the electromagnetic performance calculation to validate the improved field-superposition method. The results show that the analytical model agrees with the numerical results well, and the computation time can be reduced from 92 to 0.631 s.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 7","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536472","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 : 2025-03-26 DOI: 10.1109/TMAG.2025.3550295

引用次数: 0

A Linear Eddy Current Braking System With Normal Force Suppression Function for Electrodynamic Suspension Train 具有法向力抑制功能的电动力悬架线性涡流制动系统

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-26 DOI: 10.1109/TMAG.2025.3573300

Chao Cui;Xiaochun Fang;Jinkai Wang;Yaxuan Li;Zhongping Yang;Fei Lin

{"title":"A Linear Eddy Current Braking System With Normal Force Suppression Function for Electrodynamic Suspension Train","authors":"Chao Cui;Xiaochun Fang;Jinkai Wang;Yaxuan Li;Zhongping Yang;Fei Lin","doi":"10.1109/TMAG.2025.3573300","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3573300","url":null,"abstract":"The linear eddy current braking (LECB) system is suitable for use as an emergency braking system to ensure the safe and stable operation of high-speed maglev trains. This article analyzes the adverse effects of the normal force generated by eddy currents on the stable levitation of the electrodynamic suspension (EDS) train. From the perspective of electromagnetic mechanisms, it elucidates the intrinsic relationship between the magnetic field distribution and the resulting eddy current electromagnetic forces. Based on this theoretical framework, a novel parallel hybrid excitation (PHE) eddy current braking electromagnetic structure is proposed for the EDS train. The aim is to suppress the normal force without reducing the braking force. Using the subdomain method and the principle of equivalent magnetic vector potential, a spatiotemporal distribution model of magnetic flux density, along with analytical models for the eddy current braking force and normal force, is developed. Key parameters influencing the system’s electromagnetic performance are identified. The analytical model’s accuracy is validated through 3-D finite element simulations, confirming the effectiveness of the proposed structure and providing a theoretical basis for its application in EDS trains.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 7","pages":"1-10"},"PeriodicalIF":2.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536453","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

A Hybrid Machine Learning Algorithm for Predicting Resting Motor Thresholds in Patients With Schizophrenia and Healthy Individuals Undergoing Transcranial Magnetic Stimulation 一种用于预测经颅磁刺激的精神分裂症患者和健康个体静息运动阈值的混合机器学习算法

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2025-03-25 DOI: 10.1109/TMAG.2025.3554122

Yash R. Saxena;Connor J. Lewis;Muhammad Sabbir Alam;Jayasimha Atulasimha;Urvakhsh M. Mehta;Ravi L. Hadimani

{"title":"A Hybrid Machine Learning Algorithm for Predicting Resting Motor Thresholds in Patients With Schizophrenia and Healthy Individuals Undergoing Transcranial Magnetic Stimulation","authors":"Yash R. Saxena;Connor J. Lewis;Muhammad Sabbir Alam;Jayasimha Atulasimha;Urvakhsh M. Mehta;Ravi L. Hadimani","doi":"10.1109/TMAG.2025.3554122","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3554122","url":null,"abstract":"Due to the complex and varied neuroanatomy and functional states of brains, it is difficult to predict the resting motor threshold (RMT) needed as a dose parameter for treatment with transcranial magnetic stimulation (TMS). Our prior publications have shown that anatomical parameters, such as coil-to-cortex distance (CCD), gray matter volume (GMV), depolarized GMV (DGMV), and maximum electric field (E-field) value, neuroanatomy, and connectivity derived from functional magnetic resonance imaging (fMRI) are all associated with RMT. For 54 subjects with schizophrenia and 43 healthy subjects, fMRI blood oxygen-level detection (BOLD) in 25 brain regions was turned into time series and fed into a long short-term memory (LSTM) model. The outputs of the LSTM are concatenated with the schizophrenia status, CCD, GMV, percentage of gray matter voxels depolarized over 50 V/m (DGMV50) and 100 V/M (DGMV100), and maximum E-field value and then fed into an artificial neural network (ANN) that predicted the RMT. The training and testing mean absolute errors (MAEs) are 0.1176 and 0.0845, respectively, corresponding to the errors of 3.6456% and 2.6195% of the maximum stimulator output (%MSO) in the predicted RMT values. Our novel hybrid LSTM-ANN neural network can be used as a pretreatment procedure to reduce the number of trials needed to measure RMT for patients and increase patient comfort and confidence in the procedure administered.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 9","pages":"1-6"},"PeriodicalIF":1.9,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144920389","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