Pub Date : 2024-11-26DOI: 10.1109/TMAG.2024.3498612
{"title":"IEEE Magnetics Society Information","authors":"","doi":"10.1109/TMAG.2024.3498612","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3498612","url":null,"abstract":"","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"60 12","pages":"C2-C2"},"PeriodicalIF":2.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10767880","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757822","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}
Pub Date : 2024-11-26DOI: 10.1109/TMAG.2024.3498615
{"title":"IEEE Magnetics Society Information","authors":"","doi":"10.1109/TMAG.2024.3498615","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3498615","url":null,"abstract":"","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"60 12","pages":"C2-C2"},"PeriodicalIF":2.1,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10767879","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142713955","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}
Pub Date : 2024-11-25DOI: 10.1109/TMAG.2024.3505675
Khalid Masood;Albrecht Jander;Pallavi Dhagat
Anisotropy and magnetoelastic constants of a magnetostrictive film can be determined by measuring the ferromagnetic resonance (FMR) in the film as a function of applied magnetic field and strain. In previously reported such measurements, only the $B_{1}$ magnetoelastic constants were determined. We adapt the technique to also measure $B_{2}$ (or shear-dependent) magnetoelastic constants by designing instrumentation to apply a uniform bending moment to the sample along different crystalline axes to obtain both tensile and shear strains in the film. Knowledge of magnetoelastic constants is indispensable to enabling multiferroic and magnetoacoustic devices. $B_{2}$ , in particular, is relevant to magnetoacoustic devices where significant shear strain can be induced by the acoustic waves. Using the technique described herein, we determine the anisotropy and magnetoelastic constants for epitaxial NiZnAl-ferrite films of application interest due to their high magnetostriction and low magnetic damping. The $B_{1}$ constant is found comparable to values published elsewhere while $B_{2}$ is determined for the first time.
{"title":"Measurement of Anisotropy and Magnetoelastic Constants of Thin Crystalline Films by Angle- and Strain-Dependent Ferromagnetic Resonance Spectroscopy","authors":"Khalid Masood;Albrecht Jander;Pallavi Dhagat","doi":"10.1109/TMAG.2024.3505675","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3505675","url":null,"abstract":"Anisotropy and magnetoelastic constants of a magnetostrictive film can be determined by measuring the ferromagnetic resonance (FMR) in the film as a function of applied magnetic field and strain. In previously reported such measurements, only the \u0000<inline-formula> <tex-math>$B_{1}$ </tex-math></inline-formula>\u0000 magnetoelastic constants were determined. We adapt the technique to also measure \u0000<inline-formula> <tex-math>$B_{2}$ </tex-math></inline-formula>\u0000 (or shear-dependent) magnetoelastic constants by designing instrumentation to apply a uniform bending moment to the sample along different crystalline axes to obtain both tensile and shear strains in the film. Knowledge of magnetoelastic constants is indispensable to enabling multiferroic and magnetoacoustic devices. \u0000<inline-formula> <tex-math>$B_{2}$ </tex-math></inline-formula>\u0000, in particular, is relevant to magnetoacoustic devices where significant shear strain can be induced by the acoustic waves. Using the technique described herein, we determine the anisotropy and magnetoelastic constants for epitaxial NiZnAl-ferrite films of application interest due to their high magnetostriction and low magnetic damping. The \u0000<inline-formula> <tex-math>$B_{1}$ </tex-math></inline-formula>\u0000 constant is found comparable to values published elsewhere while \u0000<inline-formula> <tex-math>$B_{2}$ </tex-math></inline-formula>\u0000 is determined for the first time.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912494","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}
Pub Date : 2024-11-25DOI: 10.1109/TMAG.2024.3506275
Hyun-Mo Ahn;Jun-Kyu Park;Hyun-Jae Jang;Yeon-Ho Oh;Sung-Chin Hahn;Ki-Dong Song
The conventional mechanical and power electronic (MPE) hybrid dc circuit breakers (DCCBs) face challenges in balancing efficiency and performance. This study proposes an efficient MPE hybrid DCCB to address these limitations. The proposed topology reduces ON-state losses to a negligible magnitude utilizing only mechanical switches, such as the residual current switch (RCS), mechanical fast switch (MFS), and monostable mechanical switch in the main branch. Additionally, it reduces the number of semiconductor devices by employing a series connection between the MFS and the main current breaker (MCB). The dc interruption capability of the proposed MPE hybrid DCCB topology was verified through simulations based on an equivalent electric circuit, while its medium-voltage (MV)-class performance was confirmed through dc interruption tests. The proposed MPE hybrid DCCB offers an effective solution for improving the performance and reliability of dc power systems.
{"title":"An Efficient Hybrid DC Circuit Breaker With Mechanical and Power Electronics Based on Current Commutation","authors":"Hyun-Mo Ahn;Jun-Kyu Park;Hyun-Jae Jang;Yeon-Ho Oh;Sung-Chin Hahn;Ki-Dong Song","doi":"10.1109/TMAG.2024.3506275","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3506275","url":null,"abstract":"The conventional mechanical and power electronic (MPE) hybrid dc circuit breakers (DCCBs) face challenges in balancing efficiency and performance. This study proposes an efficient MPE hybrid DCCB to address these limitations. The proposed topology reduces ON-state losses to a negligible magnitude utilizing only mechanical switches, such as the residual current switch (RCS), mechanical fast switch (MFS), and monostable mechanical switch in the main branch. Additionally, it reduces the number of semiconductor devices by employing a series connection between the MFS and the main current breaker (MCB). The dc interruption capability of the proposed MPE hybrid DCCB topology was verified through simulations based on an equivalent electric circuit, while its medium-voltage (MV)-class performance was confirmed through dc interruption tests. The proposed MPE hybrid DCCB offers an effective solution for improving the performance and reliability of dc power systems.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 2","pages":"1-4"},"PeriodicalIF":2.1,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106992","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}
Pub Date : 2024-11-22DOI: 10.1109/TMAG.2024.3504497
Hongwei Cui;Conggan Ma;Yanyan Wang;Xiangyi Li;Yuling He;Zhaojie Shen;Zhaoqi Ji;Puwei Wang
Nonlinear magnetic saturation occurs in the rotor magnetic bridge area because of the complex rotor structure in the interior permanent magnet synchronous motor (IPMSM), and the degrees of nonlinear magnetic saturation in the rotor region corresponding to different magnetic pole are quite different under the state of the stator-rotor eccentricity, that makes it difficult to calculate the stray magnetic field of the IPMSMs under eccentricity. This article proposes an analytical method of the stray magnetic field in IPMSMs considering influence of asymmetric and nonuniform saturation. First, a dual iteration technique of magnetic saturation is developed to solve the air-gap magnetic field of the IPMSMs under static eccentricity and the effect of eccentricity on the complex relative permeability (CRP) is also considered. Second, extended the air-gap domain vector magnetic potential to the outer air domain using the subdomain method to solve the stray magnetic field under static eccentricity. Then, the effects of different materials, different magnetic bridge structures and different static eccentricities on the no-load leakage coefficient are analyzed. Finally, the effectiveness of the proposed analytical calculation method (ANA) is verified by a special eccentricity simulation device, the computational error is 3.92% compared to the experimental results. The computational speed is improved by 91.3% compared to the finite element method (FEM).
{"title":"Analytical Calculation of Stray Magnetic Field in Interior Permanent Magnet Synchronous Motor Under Static Eccentricity Considering Nonlinear and Nonuniform Magnetic Saturation","authors":"Hongwei Cui;Conggan Ma;Yanyan Wang;Xiangyi Li;Yuling He;Zhaojie Shen;Zhaoqi Ji;Puwei Wang","doi":"10.1109/TMAG.2024.3504497","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3504497","url":null,"abstract":"Nonlinear magnetic saturation occurs in the rotor magnetic bridge area because of the complex rotor structure in the interior permanent magnet synchronous motor (IPMSM), and the degrees of nonlinear magnetic saturation in the rotor region corresponding to different magnetic pole are quite different under the state of the stator-rotor eccentricity, that makes it difficult to calculate the stray magnetic field of the IPMSMs under eccentricity. This article proposes an analytical method of the stray magnetic field in IPMSMs considering influence of asymmetric and nonuniform saturation. First, a dual iteration technique of magnetic saturation is developed to solve the air-gap magnetic field of the IPMSMs under static eccentricity and the effect of eccentricity on the complex relative permeability (CRP) is also considered. Second, extended the air-gap domain vector magnetic potential to the outer air domain using the subdomain method to solve the stray magnetic field under static eccentricity. Then, the effects of different materials, different magnetic bridge structures and different static eccentricities on the no-load leakage coefficient are analyzed. Finally, the effectiveness of the proposed analytical calculation method (ANA) is verified by a special eccentricity simulation device, the computational error is 3.92% compared to the experimental results. The computational speed is improved by 91.3% compared to the finite element method (FEM).","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"1-11"},"PeriodicalIF":2.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905843","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}
Pub Date : 2024-11-21DOI: 10.1109/TMAG.2024.3503655
Yonghua Huang;Daohan Wang;Zhipeng Li;Xinchen Tu;Jun Nie;Xiuhe Wang
In the electromagnetic design stage of PM motors, the consideration of reducing torque ripple is as important as the improvement of motor efficiency. In this article, the electromagnetic performance of the magnet-shifted surface-mounted PM motor is analyzed and calculated in detail. The Maxwell tensor method is used to explain the mechanism of mitigating cogging torque, and it will obtain the optimal magnet-shifted angle more quickly than Finite element parameterization. According to the change rule of winding flux linkage, the winding factor of the proposed motor is calculated, which describes the principle of harmonic generation fundamentally. The magnetic field is affected by many factors and the demagnetization curve of motor materials is nonlinear, so a multiobjective optimization strategy based on the genetic algorithm and the finite element calculation is selected to acquire the best parameters.
{"title":"Electromagnetic Performance Analysis and Multiobjective Optimal Design of a Novel Magnet-Shifted PM Motor for Reducing Torque Ripple","authors":"Yonghua Huang;Daohan Wang;Zhipeng Li;Xinchen Tu;Jun Nie;Xiuhe Wang","doi":"10.1109/TMAG.2024.3503655","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3503655","url":null,"abstract":"In the electromagnetic design stage of PM motors, the consideration of reducing torque ripple is as important as the improvement of motor efficiency. In this article, the electromagnetic performance of the magnet-shifted surface-mounted PM motor is analyzed and calculated in detail. The Maxwell tensor method is used to explain the mechanism of mitigating cogging torque, and it will obtain the optimal magnet-shifted angle more quickly than Finite element parameterization. According to the change rule of winding flux linkage, the winding factor of the proposed motor is calculated, which describes the principle of harmonic generation fundamentally. The magnetic field is affected by many factors and the demagnetization curve of motor materials is nonlinear, so a multiobjective optimization strategy based on the genetic algorithm and the finite element calculation is selected to acquire the best parameters.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905790","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}
Pub Date : 2024-11-20DOI: 10.1109/TMAG.2024.3502700
Antonino Vacalebre;Aldi Hoxha;Ruben Specogna
It is well established that complementary formulations for static electromagnetic problems yield upper and lower energy bounds, a result that has been demonstrated only numerically for magnetoquasistatic (MQS) problems. However, this aspect remains completely unexplored for electroquasistatic (EQS) problems. The primary objective of this article is to solve an EQS problem for the first time using two complementary formulations. The secondary aim is to address the existing gap in the literature by numerically investigating whether energy bounds exist for EQS problems, following the approach previously applied to MQS problems.
{"title":"Exploring Bounds in Complementary Formulations for Electroquasistatics","authors":"Antonino Vacalebre;Aldi Hoxha;Ruben Specogna","doi":"10.1109/TMAG.2024.3502700","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3502700","url":null,"abstract":"It is well established that complementary formulations for static electromagnetic problems yield upper and lower energy bounds, a result that has been demonstrated only numerically for magnetoquasistatic (MQS) problems. However, this aspect remains completely unexplored for electroquasistatic (EQS) problems. The primary objective of this article is to solve an EQS problem for the first time using two complementary formulations. The secondary aim is to address the existing gap in the literature by numerically investigating whether energy bounds exist for EQS problems, following the approach previously applied to MQS problems.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"1-4"},"PeriodicalIF":2.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912400","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}
The synchronous generator running under the condenser condition can enhance the dynamic reactive power compensation capability of the new power system. However, the thermal of the generator is an important factor limiting its reactive power compensation ability. This article takes a 350 MW/300 Mvar water-hydrogen-hydrogen cooled generator-condenser as an example. Based on the coupled model of electromagnetic-fluid-thermal, the electromagnetic performance and stator temperature field under multiple working conditions are studied. First, 2-D electromagnetic field-circuit coupling model is built, and the magnetic density under generator-condenser condition is studied; additionally, the loss is used as the boundary condition to work out the thermal field. Second, through the iterative of the global ventilation network of the generator-condenser, the flow and pressure that suit the accuracy requirements are taken as the boundary conditions of the fluid field. Finally, by establishing 3-D fluid-solid coupled model of the stator with full axial half teeth and half slots, the thermal field of the winding, insulation, and water under the generator-condenser condition is analyzed with the finite volume method. This article provides useful references for the design and retrofit of the generator-condenser.
{"title":"Coupled Electromagnetic–Fluid–Thermal Analysis in Large Scale Water–Hydrogen Hydrogen-Cooled Generator-Condenser Under Different Operations","authors":"Weili Li;Yalei Li;Tianhuai Qiao;Chunsun Tian;Mingyang Liu;Yang Xiao","doi":"10.1109/TMAG.2024.3496759","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3496759","url":null,"abstract":"The synchronous generator running under the condenser condition can enhance the dynamic reactive power compensation capability of the new power system. However, the thermal of the generator is an important factor limiting its reactive power compensation ability. This article takes a 350 MW/300 Mvar water-hydrogen-hydrogen cooled generator-condenser as an example. Based on the coupled model of electromagnetic-fluid-thermal, the electromagnetic performance and stator temperature field under multiple working conditions are studied. First, 2-D electromagnetic field-circuit coupling model is built, and the magnetic density under generator-condenser condition is studied; additionally, the loss is used as the boundary condition to work out the thermal field. Second, through the iterative of the global ventilation network of the generator-condenser, the flow and pressure that suit the accuracy requirements are taken as the boundary conditions of the fluid field. Finally, by establishing 3-D fluid-solid coupled model of the stator with full axial half teeth and half slots, the thermal field of the winding, insulation, and water under the generator-condenser condition is analyzed with the finite volume method. This article provides useful references for the design and retrofit of the generator-condenser.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 2","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107116","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}
Pub Date : 2024-11-19DOI: 10.1109/TMAG.2024.3502313
Bernhard Kähne;Markus Clemens
A transient magnetic vector potential formulation for nonlinear eddy-current problems and spatial finite element discretization form a system of nonlinear algebraic differential equations. Using Rosenbrock-Wanner (ROW) time integration methods, the system of nonlinear functions is solved with a series of linear systems of equations where the Jacobian matrix is kept constant during the entire time step. This makes ROW methods error-prone to larger time step sizes, wherefore the time step size must be controlled adaptively. To improve accuracy and reliability, the Jacobian matrix is determined exactly during the time step. For highly efficient simulations of large-scale problems, the process is accelerated using parallel computing and graphic processing units (GPUs).
{"title":"A GPU-Accelerated Semi-Implicit Method for Large-Scale Nonlinear Eddy-Current Problems Using Adaptive Time Step Control","authors":"Bernhard Kähne;Markus Clemens","doi":"10.1109/TMAG.2024.3502313","DOIUrl":"https://doi.org/10.1109/TMAG.2024.3502313","url":null,"abstract":"A transient magnetic vector potential formulation for nonlinear eddy-current problems and spatial finite element discretization form a system of nonlinear algebraic differential equations. Using Rosenbrock-Wanner (ROW) time integration methods, the system of nonlinear functions is solved with a series of linear systems of equations where the Jacobian matrix is kept constant during the entire time step. This makes ROW methods error-prone to larger time step sizes, wherefore the time step size must be controlled adaptively. To improve accuracy and reliability, the Jacobian matrix is determined exactly during the time step. For highly efficient simulations of large-scale problems, the process is accelerated using parallel computing and graphic processing units (GPUs).","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"61 1","pages":"1-4"},"PeriodicalIF":2.1,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905791","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：