IEEE Transactions on Magnetics最新文献

Optimizing Corner Geometry of Door Seams in a Magnetic Shielding Room for Enhanced Shielding Effectiveness 优化磁屏蔽室门缝拐角几何形状，提高屏蔽效果

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-24 DOI: 10.1109/TMAG.2026.3667608

Zhidan Zhang;Ben Li;Ke Bian;Zihan Jiang;Yixi Zhou;Xiangyan Kong

{"title":"Optimizing Corner Geometry of Door Seams in a Magnetic Shielding Room for Enhanced Shielding Effectiveness","authors":"Zhidan Zhang;Ben Li;Ke Bian;Zihan Jiang;Yixi Zhou;Xiangyan Kong","doi":"10.1109/TMAG.2026.3667608","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3667608","url":null,"abstract":"Magnetic shielding room (MSR) is critically important infrastructure for achieving biomagnetic measurements, providing critical shielding against environmental magnetic noise. Door seams, by disrupting the magnetic circuit, significantly impair the shielding performance inside an MSR. However, there is currently insufficient research on structural refinements for door seam design. To improve the shielding factor (SF) of door seam structures in an MSR against magnetic fields across biomagnetic frequency bands (0.1 Hz–10 kHz), this article focuses particularly on the geometric shape of door seam corners and the progressive space between each layer of door seams. A 3-D finite element model was established and optimized using COMSOL Multiphysics. Using SF analysis and magnetic field contours, the curvature and gap of door seam corners were optimized, determining the optimal corner radius range (1.6–2.2 mm) and the best distance for the internal seam (2.0–2.4 mm). Simulation results showed that both the saturation radius of rounded corners and the optimal distance of the internal seam significantly enhanced shielding performance, improving SF by 2–4 dB across biomagnetic frequency bands (0.1 Hz–10 kHz). Experimental results demonstrated high agreement with the simulation, validating that these optimizations can create a reduced-noise environment for biomagnetic measurements and facilitate the measurement of lower-amplitude biomagnetic signals.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 4","pages":"1-8"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620966","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

Iron Loss Reduction in Low-Cobalt Fe–Co Soft Magnetic Foils via Tensile Stress and Annealing Optimization 利用拉伸应力和退火优化降低低钴铁钴软磁箔的铁损

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-06 DOI: 10.1109/TMAG.2026.3661539

Tomohiro Tabata;Yusuke Asari;Masafumi Nojima;Shohei Terada

{"title":"Iron Loss Reduction in Low-Cobalt Fe–Co Soft Magnetic Foils via Tensile Stress and Annealing Optimization","authors":"Tomohiro Tabata;Yusuke Asari;Masafumi Nojima;Shohei Terada","doi":"10.1109/TMAG.2026.3661539","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3661539","url":null,"abstract":"This study investigates the magnetic properties of low-cobalt Fe–Co binary alloy foils under tensile stress, aiming to reduce iron loss in soft magnetic materials for electric propulsion motors. Fe–Co alloys with 5–20 at.% Co were fabricated through vacuum melting, cold rolling, and controlled annealing, followed by magnetic characterization under applied tension. The results demonstrate that iron loss can be reduced by 25%–40% depending on Co content and tensile stress level. Notably, a minimum iron loss of 14.3 W/kg was achieved in 10 at.% Co foil under 80 MPa tension. Microstructural analysis revealed that grain growth and dislocation density, governed by annealing temperature and time, significantly influence stress-induced magnetic behavior. The reduction in coercivity and iron loss is presumed to result from magnetostriction-driven domain rotation toward the tensile direction and the decrease in non-180◦ domains. In contrast, excessive stress beyond the elastic limit was found to introduce dislocations, which hinder domain wall motion and consequently increase iron loss. These findings suggest that tensile stress application is an effective strategy to enhance the magnetic performance of cost-effective Fe–Co alloys, expanding their applicability in motor, transformer, and generator cores.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 4","pages":"1-9"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11373104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620911","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

Design of Nanocrystalline Alloy for Reducing Motor Hysteresis Loss by Machine Learning 利用机器学习减少电机磁滞损失的纳米晶合金设计

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-10 DOI: 10.1109/TMAG.2026.3663407

Tengcui Gao;Zilong Xu;Zhongwei Jiang;Zhuoqun Fan;Jiaqing Liu;Chengying Tang

{"title":"Design of Nanocrystalline Alloy for Reducing Motor Hysteresis Loss by Machine Learning","authors":"Tengcui Gao;Zilong Xu;Zhongwei Jiang;Zhuoqun Fan;Jiaqing Liu;Chengying Tang","doi":"10.1109/TMAG.2026.3663407","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3663407","url":null,"abstract":"Hysteresis loss, the main component of core loss, is directly related to the motor core material. A nanocrystalline alloy (NCA) with low hysteresis loss induced by low coercivity is developed by machine learning (ML). First, the extreme gradient boosting (XGBoost) decision tree algorithm is employed to design amorphous alloys with good soft magnetic properties. Subsequently, the alloy Fe77.5Co3.8B15P1.7Si1Nb1 designed is prepared by melt spinning and annealed at 470 °C for 180 s. The obtained coercivity (<inline-formula> <tex-math>$H_{c}$ </tex-math></inline-formula>) of the NCA is 2.84 A/m, and the saturation magnetic flux density (<inline-formula> <tex-math>$B_{s}$ </tex-math></inline-formula>) is 1.88 T. Finally, hysteresis loss is investigated by the finite-element analysis of the motor with this NCA stator core and compared with the results of the DW315-50 stator core motor. It is revealed that the hysteresis loss of the motor by the annealed alloy has been reduced by around 88% compared with the silicon steel stator core. It is indicated that the low <inline-formula> <tex-math>$H_{c}$ </tex-math></inline-formula> NCA designed by ML can effectively reduce the hysteresis loss of the motor, which is of great significance for industrial energy conservation.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 4","pages":"1-7"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620931","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

Mutual Inductance of Rogowski Coil: Absolutely Convergent Perturbation Series in Small Eccentricity of Primary Conductor Rogowski线圈的互感：初级导体小偏心时的绝对收敛微扰级数

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI: 10.1109/TMAG.2026.3660706

Filip Vučić

{"title":"Mutual Inductance of Rogowski Coil: Absolutely Convergent Perturbation Series in Small Eccentricity of Primary Conductor","authors":"Filip Vučić","doi":"10.1109/TMAG.2026.3660706","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3660706","url":null,"abstract":"Double series expansion for mutual inductance between Rogowski coil with rectangular cross section and finite straight primary conductor is obtained by applying free-space Green function expansion in Bessel functions. The system of Rogowski coil and primary conductor with imperfections caused by eccentricity of primary conductor and non-uniformity of wire turns on air-core of Rogowski coil is considered. Exact analytical calculation yielded double series expansion containing associated Legendre polynomials and it turns out to be absolutely convergent perturbation series in powers of eccentricity of primary conductor. Double series is truncated and as such is applied for calculation of mutual inductance. Seventeen test cases were constructed to examine accuracy and speed of convergence of double series. The results obtained by truncating double series coincide with the reference value of mutual inductance in at least ten significant digits for every test case. Presented test cases are divided into three groups with intention that each group reveal how variation of exactly one parameter of the eccentricity, non-uniformity of wire turns and length of primary conductor affects mutual inductance. It was observed that variation of eccentricity and length of primary conductor have significant influence on mutual inductance, while no significant effects on mutual inductance were observed due to variation of parameter describing non-uniformity of wire turns.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 4","pages":"1-10"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11371401","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620969","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

Research on the Optimization of a Multi-Point Positioning Algorithm Based on Magnetic Gradient Tensor 基于磁梯度张量的多点定位算法优化研究

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2025-11-11 DOI: 10.1109/TMAG.2025.3631561

Honglei Wang;Chunxu Jiang;Wenhan Song

{"title":"Research on the Optimization of a Multi-Point Positioning Algorithm Based on Magnetic Gradient Tensor","authors":"Honglei Wang;Chunxu Jiang;Wenhan Song","doi":"10.1109/TMAG.2025.3631561","DOIUrl":"https://doi.org/10.1109/TMAG.2025.3631561","url":null,"abstract":"In the research of underwater target positioning, when a mobile platform utilizes a magnetic gradient tensor for localization, the geomagnetic field cutting effect caused by seawater movement and the resulting induced magnetic field have a significant impact on positioning accuracy. Meanwhile, the interval distance between the two positioning points of the mobile platform will also affect the positioning accuracy. Therefore, it is necessary to optimize the positioning algorithm by considering the above two factors. In this article, the induced magnetic field noise caused by seawater movement is modeled based on the Biot–Savart law, and an adaptive Kalman filtering method is proposed for noise suppression. In addition, based on a multi-point higher-order magnetic gradient tensor positioning method, the influence of the interval distance between measurement points on the method’s performance is analyzed. An optimized positioning method is proposed. The results show that when the distance between the positioning points satisfies a specific geometric relationship, the optimal multi-point positioning effect can be achieved. The proposed methods can significantly improve the positioning accuracy of the underwater magnetic gradient tensor system in complex marine environments. This optimization method provides a theoretical basis for enhancing the reliability and accuracy of underwater positioning systems in dynamic marine environments and offers technical support for practical applications such as deep-sea exploration and autonomous underwater vehicle navigation.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 4","pages":"1-9"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620982","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

Design and Optimization of High-Precision Permanent Magnet Synchronous Linear Motor With Composite Mover 复合电机高精度永磁同步直线电机的设计与优化

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-06 DOI: 10.1109/TMAG.2026.3662095

Xiaomei Liu;Zhouyang Zhao;Yuqi Ji;Lei Huang;Wanying Jia;Hongbo Qiu

{"title":"Design and Optimization of High-Precision Permanent Magnet Synchronous Linear Motor With Composite Mover","authors":"Xiaomei Liu;Zhouyang Zhao;Yuqi Ji;Lei Huang;Wanying Jia;Hongbo Qiu","doi":"10.1109/TMAG.2026.3662095","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3662095","url":null,"abstract":"In this article, a permanent magnet synchronous linear motor (PMSLM) with composite mover core is proposed using the vector magnetic circuit analysis method. The composite mover consists of three sections along the stacking direction, with a silicon steel core in the middle and iron-based amorphous alloy cores at both ends. The expressions for end force and cogging force in a composite mover PMSLM are derived. The cross-sectional areas of different material modules in the mover are optimized to achieve simultaneous reduction of end force and cogging force, thereby significantly reducing thrust fluctuation. Furthermore, based on the coupling relationship between thrust fluctuation and normal force fluctuation, the suppression of normal force fluctuation under load conditions is achieved. The spatiotemporal characteristics of dominant harmonics in the normal electromagnetic vibration of a nine-slot ten-pole PMSLM are analyzed under load. By mitigating normal force fluctuation through the composite mover, the vibration acceleration dominated by major harmonics under load is effectively reduced. Finally, the validity of the theoretical analysis and simulation results is experimentally verified.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 4","pages":"1-9"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620949","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

Analysis and Optimization for Surface-Inset Permanent Magnet Synchronous Generator Considering Nonlinear Permeability Based on Harmonic Modeling 考虑非线性磁导率的面插式永磁同步发电机谐波建模分析与优化

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-06 DOI: 10.1109/TMAG.2026.3661542

Manh-Dung Nguyen;Duy-Tinh Hoang;Kyung-Hun Shin;Jang-Young Choi

引用次数: 0

Oscillations and Displacement of a Single Domain Wall in an Alternating Magnetic Field in Bistable Microwire 交变磁场下双稳态微线单畴壁的振荡和位移

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-26 DOI: 10.1109/TMAG.2026.3668296

Jozef Onufer;Peter Duranka;Mária Kladivová;Peter Vrábel;Ján Ziman

引用次数: 0

The Effect of Magnetization Direction and Stacking of Layers on Charge to Spin Conversion in Graphene on 1T-TaS2 磁化方向和层积对石墨烯在1T-TaS2上电荷自旋转换的影响

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-23 DOI: 10.1109/TMAG.2026.3667420

Juraj Mnich;Marko Milivojević;Martin Gmitra

引用次数: 0

An Effective Error Correction Scheme to Improve Reliability for Optical Data Storage 一种提高光数据存储可靠性的有效纠错方案

IF 1.9 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI: 10.1109/TMAG.2026.3660664

Tianwei Gui;Meng Zhang;Kaiwen Yang;Wei Li;Changsheng Xie;Fei Wu

{"title":"An Effective Error Correction Scheme to Improve Reliability for Optical Data Storage","authors":"Tianwei Gui;Meng Zhang;Kaiwen Yang;Wei Li;Changsheng Xie;Fei Wu","doi":"10.1109/TMAG.2026.3660664","DOIUrl":"https://doi.org/10.1109/TMAG.2026.3660664","url":null,"abstract":"For storing enormous volumes of cold data, optical data storage is a strong competitor due to its great capacity, energy efficiency, and long lifespan. However, optical data storage devices exposed to real-world conditions frequently experience random and burst errors. Damage to the same region of the medium causes more bit errors, and crosstalk between data increases as a single disk’s storage capacity rises. Error correction codes (ECCs) have to fulfill greater requirements due to the increased raw bit error rate. In this article, we optimize the traditional error correction scheme using a multilevel coding method, proposing multilevel Picket codes (MLPCs). First, we introduce an improved multilevel ECC (iMLECC), which allows different component codes of Picket codes to share redundancy, thereby improving overall error correction capability. For random errors, the iMLECC reduces the symbol error rate of user data by five to eight orders of magnitude and that of control data by 5–20 orders of magnitude while achieving a higher code rate. We also propose a tag-based decoding optimization scheme that reduces unnecessary multilevel decoding iterations. Compared to traditional multilevel decoding algorithms, the proposed scheme reduces decoding latency by approximately 40%. Furthermore, addressing the channel characteristic of burst errors in optical disk storage, we leverage the shared redundancy of multilevel coding to strengthen the burst error detection capability of conventional Picket codes. This results in an approximately 50% improvement in the identification rate for long burst errors. According to the simulation results, MLPC is a preferable option for optical ECCs since it has a more comprehensive capability.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"62 4","pages":"1-13"},"PeriodicalIF":1.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147620965","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