IEEE Transactions on Magnetics最新文献_第10页

Structural and Magnetic Characterization of a Ferrofluid Obtained Through an Economical Way of Chemical Synthesis 通过经济的化学合成方法获得的铁流体的结构和磁性特征

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-22 DOI: 10.1109/tmag.2024.3418627

Iván Cely Orjuela, Patricia C. Rivas Rojas, Pablo Tancredi, Oscar Moscoso Londoño, Leandro M. Socolovsky

引用次数: 0

Prototype Verification of Flux Reversal Motor With Cross-Pole Shape Stator 带十字极定子的磁通反转电机原型验证

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-22 DOI: 10.1109/TMAG.2024.3430941

Yue Yu;Kenji Nakamura

引用次数: 0

Analysis and Comparison Between Flux-Switching Motors With Pole-Changing and Hybrid-Excited Designs 具有换极设计和混合励磁设计的磁通开关电机的分析与比较

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-19 DOI: 10.1109/TMAG.2024.3431246

Zhuofan He;Feng Xiao;Yi Du;Xiaoyong Zhu

引用次数: 0

The Influence of Cu Powders Doping on Magnetic and Mechanical Properties of Sm₂Co₁₇ Permanent Magnets 掺杂铜粉对 Sm2Co17 永磁体磁性和机械特性的影响

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-19 DOI: 10.1109/TMAG.2024.3431010

Bo Zhou;Yong Ding;Shuaikang Song;Chunguo Wang;Chaozhong Wang;Lei Liu;Yingli Sun;Aru Yan

{"title":"The Influence of Cu Powders Doping on Magnetic and Mechanical Properties of Sm₂Co₁₇ Permanent Magnets","authors":"Bo Zhou;Yong Ding;Shuaikang Song;Chunguo Wang;Chaozhong Wang;Lei Liu;Yingli Sun;Aru Yan","doi":"10.1109/TMAG.2024.3431010","DOIUrl":"10.1109/TMAG.2024.3431010","url":null,"abstract":"In this work, the influence of Cu powders doping on the magnetic and mechanical properties of Sm2Co17 permanent magnets is systematically investigated. For high-energy-product Sm2Co17 (low initial Cu content), the intrinsic coercivity is significantly improved from 11.7 to 25.7 kOe with 1 wt.% Cu powders doping. The flux loss (soaking at 300 °C for 2 h) is reduced from 7.4% to 3.8%, and the average flexure strength is improved from 60.2 to 74.1 MPa. For high-temperature-resistant Sm2Co17 (high initial Cu content), the intrinsic coercivity is slightly reduced from 39.2 to 38.3 kOe with 1 wt.% Cu powders doping. The flux loss (soaking at 300 °C for 2 h) is increased from 1.4% to 3.4%, and the average flexure strength is improved from 86.7 to 93.2 MPa. The differences in magnetic properties change of these two Sm2Co17 permanent magnets are closely related with their initial Cu content. The doped Cu is prone to diffuse into intragranular cell boundaries in magnet with low initial Cu content. The increased Cu content in intragranular cell boundaries benefits the improvement of intrinsic coercivity, thus enhancing the thermal stability and reducing the flux loss. Doping Cu powders may increase the Cu-rich phase around ground boundaries, which will hinder the grain growth during heat treatment. The decrease of grain size will enhance the flexure strength, while it will increase the flux loss.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"60 10","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741731","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 Flux Reversal Permanent Magnet Motor With Uneven Magnetomotive Force Shift 磁通量反转永磁电机的不均匀磁动力转变

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-19 DOI: 10.1109/TMAG.2024.3431213

Han Chen;Feng Xiao;Yi Du;Xiaoyong Zhu

引用次数: 0

Low-Temperature Magnetization, Calorimetric Properties, and Magnetocaloric Effect of Europium Chalcogenides EuSe and EuSe₀.₉₀S₀.₁₀ 硒化铕和硒化铕0.90S0.10的低温磁化、量热特性和磁ocaloric效应

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-18 DOI: 10.1109/TMAG.2024.3430866

Julieth Caro Patiño;Denis Paulo Neto;Angelo Marcio Gomes

{"title":"Low-Temperature Magnetization, Calorimetric Properties, and Magnetocaloric Effect of Europium Chalcogenides EuSe and EuSe₀.₉₀S₀.₁₀","authors":"Julieth Caro Patiño;Denis Paulo Neto;Angelo Marcio Gomes","doi":"10.1109/TMAG.2024.3430866","DOIUrl":"10.1109/TMAG.2024.3430866","url":null,"abstract":"We present the experimental results of the magnetic and calorimetric properties as well as the magnetocaloric effect of the \u0000<inline-formula> <tex-math>$text {EuSe}_{1-x}textit {S}_{x}$ </tex-math></inline-formula>\u0000 compounds with \u0000<inline-formula> <tex-math>$x = 0$ </tex-math></inline-formula>\u0000 and 0.03, whose final composition was 0.10. In this family of samples, we observe a competition of antiferromagnetic, ferrimagnetic, and ferromagnetic behavior for low temperatures between 2.5 and 40 K. The magnetocaloric quantities \u0000<inline-formula> <tex-math>$Delta {S}_{text {M}}$ </tex-math></inline-formula>\u0000 and \u0000<inline-formula> <tex-math>$Delta T_{text {ad}}$ </tex-math></inline-formula>\u0000 have high values for the two compounds of \u0000<inline-formula> <tex-math>$32.5~{text {J},text {kg}^{-1}text {K}^{-1}}$ </tex-math></inline-formula>\u0000 (9.8 K) for EuSe and \u0000<inline-formula> <tex-math>$29.3~{text {J},text {kg}^{-1}text {K}^{-1}}$ </tex-math></inline-formula>\u0000 (9.1 K) for EuSe090S010, respectively. The results indicated that these alloys are good candidates for gas liquefaction in cryogenics temperatures.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"60 9","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741732","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

Identification of spatial homogeneous regions in tissues with concordex. 利用 concordex 识别组织中的空间均质区域。

3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-18 DOI: 10.1101/2023.06.28.546949

Kayla C Jackson, A Sina Booeshaghi, Ángel Gálvez-Merchán, Lambda Moses, Tara Chari, Alexandra Kim, Lior Pachter

引用次数: 0

An Ultra-Thin Self-Resonant Coupler With Nanocrystalline Flake Ribbons for Wireless Power Transfer System 用于无线电力传输系统的纳米晶薄片带状超薄自谐振耦合器

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-17 DOI: 10.1109/TMAG.2024.3429488

Jingchun Xiang;C. Q. Jiang;Tianlu Ma;Yibo Wang;Yuanshuang Fan

引用次数: 0

Optimal Design and Experimental Analysis of Rotor Casting Defect Detector 转子铸造缺陷检测器的优化设计与实验分析

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-17 DOI: 10.1109/TMAG.2024.3429619

Kyu-Seok Lee;Jae-Hyeok Seo;Sung-Ho Lee

{"title":"Optimal Design and Experimental Analysis of Rotor Casting Defect Detector","authors":"Kyu-Seok Lee;Jae-Hyeok Seo;Sung-Ho Lee","doi":"10.1109/TMAG.2024.3429619","DOIUrl":"10.1109/TMAG.2024.3429619","url":null,"abstract":"The rotor of an induction motor, commonly known as a squirrel cage rotor, is manufactured via the die-casting process. The squirrel cage rotor comprises a rotor core, conductor bars, and end rings manufactured using either aluminum or copper via the die-casting process. Most induction motors used in industrial applications are equipped with squirrel cage rotors, which are advantageous owing to the ease of their mass production. However, when a rotor is manufactured via die casting, gas is introduced into the conductor bar and end ring areas, forming pores and shrinkage cavities. These defects adversely affect the quality of the manufactured rotors. They may result in problems during post-processing and assembly. When rotor casting defects are present, these problems can increase material costs and time loss. Therefore, this study proposes a model that can promptly detect casting defects when a rotor is manufactured. Additionally, the model enhances the size and waveform of the detection signal by optimizing the geometry of the detector core, ensuring consistent performance under the same operating conditions. An improved prototype model was designed and manufactured based on a previously studied detector model, and finite element analysis (FEA) and experimental results were compared to verify the validity of the analysis technique. Moreover, the core shape of the rotor casting defect detector was optimized, and the detection signal of the optimized model was analyzed and compared with that of the FEA. A fast Fourier transform (FFT) analysis of the detection signal of the optimized detector model shows an increase of more than ten-fold in the magnitude of the fundamental wave and more than 36% reduction in the total harmonic distortion (THD) compared to the initial model.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"60 9","pages":"1-5"},"PeriodicalIF":2.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741735","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 Novel Energy-Efficient Sinusoidal Power Clocking-Based Writing Circuitry for the Hybrid CMOS/MTJ Architecture 基于正弦功率时钟的新型高能效写入电路，适用于 CMOS/MTJ 混合架构

IF 2.1 3区工程技术

IEEE Transactions on Magnetics Pub Date : 2024-07-17 DOI: 10.1109/TMAG.2024.3430120

Wu Yang;Amit Degada;Himanshu Thapliyal

{"title":"A Novel Energy-Efficient Sinusoidal Power Clocking-Based Writing Circuitry for the Hybrid CMOS/MTJ Architecture","authors":"Wu Yang;Amit Degada;Himanshu Thapliyal","doi":"10.1109/TMAG.2024.3430120","DOIUrl":"10.1109/TMAG.2024.3430120","url":null,"abstract":"Spin transfer torque magnetic random access memory (STT-MRAM) offers a promising solution for low-power and high-density memory due to its compatibility with CMOS, higher density, scalable nature, and non-volatility. However, the higher energy required to write bit cells has remained a key challenge for its adaptation into battery-operated smart handheld devices. The existing low-energy writing solutions require additional complex control logic mechanisms, further constraining the available area. In this research, we propose a solution to design energy-efficient write circuits by incorporating two techniques together. First, we propose the sinusoidal power clocking mechanism replacing the DC power supply in the conventional CMOS design. Second, we propose three lookup table (LUT)-based control logic circuits and one write circuit to reduce the area and further minimize energy dissipation. The experimental results are verified over the case study implementations of \u0000<inline-formula> <tex-math>$4 times 4$ </tex-math></inline-formula>\u0000 STT-MRAM macro designed using bit cell configurations: i) one transistor and one magnetic tunnel junction (MTJ) (1T-1MTJ) and ii) four transistors and two MTJs (4T-2MTJ). The post-layout simulation for the frequency range from 250 kHz to 6.25 MHz shows that the write circuit, which uses the proposed LUT-based control logic circuits and a write driver with a sinusoidal power supply, achieves more than a 65.05% average energy saving compared to the CMOS counterpart. Furthermore, the write circuit, which uses the proposed 6T write driver with the sinusoidal power supply, shows an improvement in energy saving by more than 70.60% compared to the CMOS counterpart. We also verified that the energy-saving performance remains relatively consistent with the change in temperature and the tunneling magnetoresistance (TMR) ratio.","PeriodicalId":13405,"journal":{"name":"IEEE Transactions on Magnetics","volume":"60 9","pages":"1-14"},"PeriodicalIF":2.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141741734","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