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Journal articles on the topic 'Ferrite permanent magnet'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Sun, R. X., Z. G. Deng, Y. F. Gou, et al. "Feasibility of low-cost magnetic rail designs by integrating ferrite magnets and NdFeB magnets for HTS Maglev systems." International Journal of Modern Physics B 29, no. 25n26 (2015): 1542043. http://dx.doi.org/10.1142/s0217979215420436.

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Permanent magnet guideway (PMG) is an indispensable part of high temperature superconducting (HTS) Maglev systems. Present PMGs are made of NdFeB magnets with excellent performance and cost much. As another permanent magnet material, the ferrite magnet is weak at magnetic energy product and coercive force, but inexpensive. So, it is a possible way to integrate the ferrite and NdFeB magnets for cutting down the cost of present PMGs. In the paper, the equivalent on magnetic field intensity between ferrite magnets and NdFeB magnets was evaluated by finite element simulation. According to the calc

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2

Baek, Soo-Whang, ., and . "Study on Improvement of Torque Characteristics of IPM BLDC Motor for Electric Water Pump using Ferrite Magnet." International Journal of Engineering & Technology 7, no. 4.39 (2018): 46–51. http://dx.doi.org/10.14419/ijet.v7i4.39.23696.

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Background/Objectives: The objectives of this study are to propose a design method to replace the permanent magnets of brushless DC (BLDC) motors used in electric water pumps (EWPs) with ferrite materials and to improve the torque characteristics.Methods/Statistical analysis: Using the proposed design algorithm presented in this study, the shape of the ferrite permanent magnet used in the rotor was changed, and the output at the same level was confirmed when compared with that of the conventional model that uses rare-earth magnet. In addition, finite element (FE) analysis verified that the cog

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Radwan-Pragłowska, Natalia, and Tomasz Węgiel. "Permanent Magnet Selections for AFPM Disc Generators." Energies 15, no. 20 (2022): 7601. http://dx.doi.org/10.3390/en15207601.

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In this article, the field (FEM) and analytical analyses were used for the optimal selection of magnets material for the Axial Flux Permanent Magnet Generator (AFPMG), without building the prototype before. The tested generator is an axial flux machine which consists of a single stator and two rotor discs with Permanent Magnets (PM). Three-dimensional (3D) ANSYS Maxwell package was used for magnetostatic and transient field (FEM) simulations. Two types of PM were selected for the analysis: Ceramic (also known as “Ferrite”) magnets made from Strontium Ferrite powder and Neodymium Iron Boron mag

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Erhart, Jiří, and Pavlína Hejsková. "Investigating magnetization of permanent magnets by magnetic flux viewing film." Physics Education 59, no. 2 (2024): 025023. http://dx.doi.org/10.1088/1361-6552/ad2190.

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Abstract Permanent magnets are used in many current industrial as well as home appliances today. Frequently, kitchen plastic magnets could be found at the refrigerators at home. However, the magnetic domain structure of such permanent plastic foils is not known and understood to the users at all. The purpose of this paper is to explain the magnetic domain structure of plastic magnets with Halbach array and ferrite or neodymium magnet polarization orientation. Principles of magnetic field visualization foils (magnetic flux detector and colour changing viewing film) is explained and demonstrated

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Dobzhanskyi, Oleksandr, Viktor Grebenikov, Rupert Gouws, Rostyslav Gamaliia, and Eklas Hossain. "Comparative Thermal and Demagnetization Analysis of the PM Machines with Neodymium and Ferrite Magnets." Energies 15, no. 12 (2022): 4484. http://dx.doi.org/10.3390/en15124484.

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This paper provides computer analysis and experiential investigation of the permanent magnet machines with neodymium and ferrite permanent magnets to discuss the feasibility of utilizing induction machines-oriented equipment for PM machine production. For this purpose, the machines are obtained by replacing the squirrel-cage rotor of the induction motor with the flux-focusing (tangential) and surface-mounted (radial) permanent magnet rotors. Electromechanical parameters of the machines as electromagnetic torque and output power are discussed and compared. The temperatures of the neodymium and

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Jacobo, Silvia E., and P. G. Bercoff. "Coercivity Enhancement of Hexagonal Ferrites." Solid State Phenomena 202 (May 2013): 113–25. http://dx.doi.org/10.4028/www.scientific.net/ssp.202.113.

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Hexagonal ferrites have been widely used as permanent magnets since their discovery in the 1950s. In spite of their relatively modest magnetic properties, ferrite magnets still show the best performance-to-cost ratio and different investigators are trying to improve their magnetic capabilities by using different synthesis methods and compositions. Different scientific investigations and techniques (Mössbauer spectrometry, X-ray diffraction, and magnetic measurements) have allowed to optimize the permanent magnet properties of rare earth substituted hexagonal ferrite magnets such as La-Co and

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Hoang, Trung-Kien, Lionel Vido, and Celia Tchuanlong. "Torque Ripple and Mass Comparison between 20 MW Rare-Earth and Ferrite Permanent Magnet Wind Generators." Machines 11, no. 12 (2023): 1063. http://dx.doi.org/10.3390/machines11121063.

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This article investigates the comparison between two configurations of 20 MW offshore synchronous wind generators using ferrite and rare-earth permanent magnets. The optimization-based comparison concerns the torque ripple and active mass, which are two crucial criteria for offshore wind generators. Both generators adopt surface-mounted permanent magnet type with direct-drive technology to avoid problems associated with the gearboxes. The result shows that at the full-load condition, the ferrite permanent magnet generator can reduce the torque ripple to as much as 0.12%, while the rare-earth c

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Sekerák, Peter, Valéria Hrabovcová, Juha Pyrhönen, Lukáš Kalamen, Pavol Rafajdus, and Matúš Onufer. "Ferrites and Different Winding Types in Permanent Magnet Synchronous Motor." Journal of Electrical Engineering 63, no. 3 (2012): 162–70. http://dx.doi.org/10.2478/v10187-012-0024-8.

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Ferrites and Different Winding Types in Permanent Magnet Synchronous MotorThis paper deals with design of permanent magnet synchronous machines with ferrites. The ferrites became popular due to their low cost and cost increasing of NdFeB. The progress in ferrite properties in the last decade allows the use of ferrites in high power applications. Three models of ferrite motors are presented. It is shown that also the type of stator winding and the shape of the slot opening have an important effect on the PMSM properties. The first motor has a distributed winding, the second motor has concentrat

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Liu, Xiping, Ya Li, Zhangqi Liu, Tao Ling, and Zhenhua Luo. "Analysis and design of a high power density permanent magnet-assisted synchronous reluctance machine with low-cost ferrite magnets for EVs/HEVs." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 6 (2016): 1949–64. http://dx.doi.org/10.1108/compel-05-2016-0233.

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Purpose The purpose of this paper is to propose a permanent magnet-assisted synchronous reluctance machine (PMASynRM) using ferrite magnets with the same power density as rare-earth PM synchronous motors used in Toyota Prius 2010. Design/methodology/approach A novel rotor structure with rectangular PMs is discussed with respect to the demagnetization of ferrite magnets and mechanical strength. Some electromagnetic characteristics including torque, output power, loss and efficiency are calculated by 2D finite element analysis. Findings The results of the analysis show that a high power density

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Bernad, Sandor I., and Elena Bernad. "Magnetic Forces by Permanent Magnets to Manipulate Magnetoresponsive Particles in Drug-Targeting Applications." Micromachines 13, no. 11 (2022): 1818. http://dx.doi.org/10.3390/mi13111818.

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This study presents preliminary computational and experimental findings on two alternative permanent magnet configurations helpful for magnetic drug administration in vivo. A numerical simulation and a direct experimental measurement of the magnetic induction on the magnet system’s surface were used to map the magnetic field. In addition, the ferrite-type (grade Y35) and permanent neodymium magnets (grade N52) to produce powerful magnetic forces were also examined analytically and quantitatively. Ansys-Maxwell software and Finite Element Method Magnetism (FEMM) version 4.2 were used for all nu

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Kontos, Sofia, Anar Ibrayeva, Jennifer Leijon, et al. "An Overview of MnAl Permanent Magnets with a Study on Their Potential in Electrical Machines." Energies 13, no. 21 (2020): 5549. http://dx.doi.org/10.3390/en13215549.

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In this paper, hard magnetic materials for future use in electrical machines are discussed. Commercialized permanent magnets used today are presented and new magnets are reviewed shortly. Specifically, the magnetic MnAl compound is investigated as a potential material for future generator designs. Experimental results of synthesized MnAl, carbon-doped MnAl and calculated values for MnAl are compared regarding their energy products. The results show that the experimental energy products are far from the theoretically calculated values with ideal conditions due to microstructure-related reasons.

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Jang, Gwan-Hui, Abdur Rehman, and Gilsu Choi. "Comparative Analysis and Design Optimization of Ferrite-Based Surface PM Vernier Machines." Energies 17, no. 7 (2024): 1687. http://dx.doi.org/10.3390/en17071687.

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This paper presents the results of a comprehensive investigation into the comparative analysis and design optimization of ferrite-based surface permanent magnet vernier machines (SPMVMs). While SPMVMs boast a simple mechanical structure and enhanced torque density attributed to the flux modulation effect, they suffer from a persistent challenge of low power factor. Several factors hinder the adoption of low-cost ferrite magnets in SPMVMs. First, ferrite magnets are prone to irreversible demagnetization, constraining the allowable range of magnet thickness. Second, the reduced residual magnetic

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13

Li, Ya, Hui Yang, Heyun Lin, Shuhua Fang, and Weijia Wang. "A Novel Magnet-Axis-Shifted Hybrid Permanent Magnet Machine for Electric Vehicle Applications." Energies 12, no. 4 (2019): 641. http://dx.doi.org/10.3390/en12040641.

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This paper proposes a novel magnet-axis-shifted hybrid permanent magnet (MAS-HPM) machine, which features an asymmetrical magnet arrangement, i.e., low-cost ferrite and high-performance NdFeB magnets, are placed in the two sides of a “▽”-shaped rotor pole. The proposed magnet-axis-shift (MAS) effect can effectively reduce the difference between the optimum current angles for maximizing permanent magnet (PM) and reluctance torques, and hence the torque capability of the machine can be further improved. The topology and operating principle of the proposed MAS-HPM machine are introduced and are c

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14

Liu, Yan, Wenliang Zhao, Xue Fan, Xiuhe Wang, and Byung-il Kwon. "Optimal design of a surface-mounted permanent magnet motor with multi-grade ferrite magnets to reduce torque pulsations." International Journal of Applied Electromagnetics and Mechanics 64, no. 1-4 (2020): 79–89. http://dx.doi.org/10.3233/jae-209310.

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This paper proposes an optimal design for a surface-mounted permanent magnet motor (SPMM) to reduce torque pulsations, including cogging torque and torque ripple, by using multi-grade ferrite magnets. Based on a conventional SPMM with single-grade ferrite magnets, the proposed SPMM is designed with four-grade ferrite magnets and then optimized to minimize torque pulsations by maintaining the required torque, utilizing the Kriging method and a genetic algorithm. The results obtained by the finite element analysis show that the optimized SPMM with multi-grade ferrite magnets exhibits improved ai

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15

Liu, Xiping, Ya Li, Zhangqi Liu, Tao Ling, and Zhenhua Luo. "Optimized design of a high-power-density PM-assisted synchronous reluctance machine with ferrite magnets for electric vehicles." Archives of Electrical Engineering 66, no. 2 (2017): 279–93. http://dx.doi.org/10.1515/aee-2017-0021.

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AbstractThis paper proposes a permanent magnet (PM)-assisted synchronous reluctance machine (PMASynRM) using ferrite magnets with the same power density as rareearth PM synchronous motors employed in Toyota Prius 2010. A suitable rotor structure for high torque density and high power density is discussed with respect to the demagnetization of ferrite magnets, mechanical strength and torque ripple. Some electromagnetic characteristics including torque, output power, loss and efficiency are calculated by 2-D finite element analysis (FEA). The analysis results show that a high power density and h

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16

Lee, Oliver Mitchell, and Mohammadali Abbasian. "Reducing Rare-Earth Magnet Reliance in Modern Traction Electric Machines." Energies 18, no. 9 (2025): 2274. https://doi.org/10.3390/en18092274.

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Currently, electric machines predominantly rely on costly rare-earth NdFeB magnets, which pose both economic and environmental challenges due to rising demand. This research explores recent advancements in machine topologies and magnetic materials to identify and assess promising solutions to this issue. The study investigates two alternative machine topologies to the conventional permanent magnet synchronous machine (PMSM): the permanent magnet-assisted synchronous reluctance machine (PMaSynRM), which reduces magnet usage, and the wound-field synchronous machine (WFSM), which eliminates magne

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17

Sirisathitkul, Chitnarong, and Yaowarat Sirisathitkul. "Recent Developments in 3D Printing of Rare-Earth-Free Permanent Magnets." Inventions 7, no. 3 (2022): 71. http://dx.doi.org/10.3390/inventions7030071.

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This article reviews the advances in additive manufacturing of magnetic ceramics and alloys without rare-earth elements. Near-net-shaped permanent magnets with varying shapes and dimensions overcome traditional limitations of the cast, sintered, and bonded magnets. The published articles are categorized based on material types and 3D printing techniques. Selective laser melting and electron beam melting were predominantly used to produce alnico magnets. In addition to the electron beam melting, manganese aluminium-based alloys were successfully printed by fuse filament fabrication. By incorpor

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18

Jeong, Min-Jae, Kang-Been Lee, Si-Woo Song, Seung-Heon Lee, and Won-Ho Kim. "A Study on Magnetization Yoke Design for Post-Assembly Magnetization Performance Improvement of a Spoke-Type Permanent Magnet Synchronous Motor." Machines 11, no. 9 (2023): 850. http://dx.doi.org/10.3390/machines11090850.

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Permanent magnet synchronous motors (PMSMs) are highly affected by magnetization, which determines the magnetization level in the permanent magnet (PM). There are three main magnetization methods: single-unit, stator coil, and post-assembly magnetization. Post-assembly magnetization is widely used in PMSM mass production due to its ability to achieve high magnetization performance using a separate magnetizing yoke. However, spoke-type PMSMs with ferrite PMs face challenges when using the post-assembly method. The structural configuration of two magnets located radially hampers effective magnet

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19

Wang, Xing Hua, Xue Yuan Lin, Ming Hui Li, Yu Chen, and Cheng Hui Zhang. "A Novel Flux-Weakening Structure of High-Speed Permanent Magnet Motor Based on the Soft Ferrite." Advanced Materials Research 694-697 (May 2013): 1508–11. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.1508.

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Soft ferrite has the characteristics of high permeability, high resistivity, low loss. Based on this, a new flux-weakening structure of high-speed permanent magnet motor was presented. The structure relies on changing the saturation of soft magnetic ferrite to change the equivalent magnetic resistance of permanent magnet magnetic circuit in the motor, so the main flux of the permanent magnet motor can be reduced. By the 3D Finite Element analyses, the magnetic field distribution characters in the air gap can be pointed out. The analysis results prove the flux-weakening method is presented in t

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20

Eriksson, Sandra. "Inherent Difference in Saliency for Generators with Different PM Materials." Journal of Renewable Energy 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/567896.

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The inherent differences between salient and nonsalient electrical machines are evaluated for two permanent magnet generators with different configurations. The neodymium based (NdFeB) permanent magnets (PMs) in a generator are substituted with ferrite magnets and the characteristics of the NdFeB generator and the ferrite generator are compared through FEM simulations. The NdFeB generator is a nonsalient generator, whereas the ferrite machine is a salient-pole generator, with small saliency. The two generators have almost identical properties at rated load operation. However, at overload the b

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Kang, Mei, Liang Xu, Jinghua Ji, and Xuhui Zhu. "Design and Analysis of a High Torque Density Hybrid Permanent Magnet Excited Vernier Machine." Energies 15, no. 5 (2022): 1723. http://dx.doi.org/10.3390/en15051723.

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Permanent magnet (PM) excited vernier machines capable of high torque density have good potential for electric vehicles while requiring high rare earth PM consumption. To achieve a high torque density at a reasonable material cost, hybrid PM excited vernier machines incorporating both expensive rare earth and low-cost ferrite magnets are investigated in this paper. Various combinations of PM arrangements for the hybrid permanent magnet excited vernier machine are investigated to acquire low cost and superior torque density. The best solution obtained is that the PM on the stator adopts rare ea

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Biloshytskyi, Mykola, Halyna Tatarchenko, Nataliia Biloshytska, and Pavlo Uvarov. "Operational lifetime increase of the pumping equipment when pumping-out contaminated groundwater." Mining of Mineral Deposits 15, no. 1 (2021): 42–49. http://dx.doi.org/10.33271/mining15.01.042.

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Purpose. Solving the problem of increasing the pumping equipment operational lifetime when pumping-out contaminated groundwater in the iron-ore industry by extracting the hard, abrasive part, using magnetic filters based on permanent ferrite magnets. Methods. To produce spherical hard-magnetic ferrite elements that catch finely-dispersed magnetic and weakly-magnetic abrasive particles when pumping-out contaminated groundwater in the iron-ore industry, barium ferrite powder BaО∙6Fe2O3 is applied, which is usually used for obtaining hard-magnetic ferrites. Spherical elements for filling a magnet

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Rajini, V., VS Nagarajan, Karunya Harikrishnan, and Mohan Lal Kolhe. "Electromagnetic design, sensitivity analysis, optimization and Multiphysics capability of rare-earth-free synchronous reluctance motor for electric trike vehicle." AIMS Energy 12, no. 5 (2024): 1027–53. http://dx.doi.org/10.3934/energy.2024049.

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<p>As a part of last-mile transportation, electric three-wheelers, popularly known as trikes, are considered as an important aspect of the future of the auto industry. The appropriate choice of electric traction motor drive is imperative to the design of an electric motor power train. In this paper, six main types of sinusoidal-fed electric motor power trains—Ferrite-Assisted Synchronous Reluctance Motor (FASRM), Synchronous Reluctance Motor (SyncRelM), Ferrite-based Spoke motor, Ferrite-based Surface-Mounted Permanent Magnet Synchronous Motor (SMPMSM), Wound-Field Synchronous Motor (WFS

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M. Salman, Ahmed, Jamal A.-K. Mohammed, and Farag M. Mohammed. "Analysis of Permanent Magnet Material Influence on Eddy Current Braking Efficiency." Iraqi Journal for Electrical and Electronic Engineering 20, no. 2 (2024): 220–25. http://dx.doi.org/10.37917/ijeee.20.2.18.

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Traditional friction brakes can generate problems such as high braking temperature and pressure, cracking, and wear, leading to braking failure and user damage. Eddy current brake systems (contactless magnetic brakes) are one method used in motion applications. They are wear-free, less temperature-sensitive, quick, easy, and less susceptible to wheel lock, resulting in less brake failure due to the absence of physical contact between the magnet and disc. Important factors that can affect the performance of the braking system are the type of materials manufactured for the permanent magnets. Thi

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Liu, Zhongqi, Guiyuan Zhang, and Guanghui Du. "An Investigation of Parameter Dimension Reduction Optimization of PMA-Synrm." Applied Sciences 15, no. 3 (2025): 1529. https://doi.org/10.3390/app15031529.

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The rotor of a permanent magnet-assisted synchronous reluctance (PMA-Synrm) motor mostly adopts the structure of a multi-layer magnetic barrier and multi-layer ferrite, which leads to the design parameters of this kind of motor increase with the increase in the number of magnetic barrier layers. A large number of design parameters are coupled with each other, which makes the optimization design of a permanent magnet-assisted synchronous reluctance motor particularly difficult. In this paper, a 7.5 kW, 1500 rpm permanent magnet-assisted synchronous reluctance motor is taken as the research obje

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Dmitrievskii, Vladimir, Vadim Kazakbaev, Vladimir Prakht, and Alecksey Anuchin. "Permanent Magnet Assisted Synchronous Reluctance Motor for Subway Trains." World Electric Vehicle Journal 15, no. 9 (2024): 417. http://dx.doi.org/10.3390/wevj15090417.

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With the growing demand and projected shortage of rare earth elements in the near future, the urgent task of developing energy-efficient electrical equipment with less dependence on rare earth magnets has become paramount. The use of permanent magnet-assisted synchronous reluctance motors (PMaSynRMs), which reduce the consumption of rare earth magnets, can help solve this problem. This article presents a theoretical analysis of the characteristics of PMaSynRM in a subway train drive. Options with rare earth and ferrite magnets are considered. Optimization of the motor designs considering the t

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Zigert, A. D., N. B. Kuz’min, N. Yu Sdobnyakov, A. I. Ivanova, G. G. Dunaeva, and E. M. Semenova. "Fractal analysis of magneto-optical visualization of the remagnetization of a permanent magnet in a pulsed field." Известия Российской академии наук. Серия физическая 87, no. 10 (2023): 1385–88. http://dx.doi.org/10.31857/s0367676523702423.

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The results of fractal analysis of images of the surface of a permanent magnet KS37, obtained by the method of the polar Kerr effect using an indicator bismuth-containing ferrite-garnet film after magnetization reversal by a pulsed field of 0.1–1.5 T, are presented. The obtained dependences of the residual magnetization on the magnitude of the external pulsed field are compared with the fractal dimension of the magneto-optical images of the magnet surface after exposure to the pulsed field. It is shown that the maximum value of the fractal dimension corresponds to the demagnetized state of the

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Shanshal, Abdullah, Khoa Hoang, and Kais Atallah. "High-Performance Ferrite Permanent Magnet Brushless Machines." IEEE Transactions on Magnetics 55, no. 7 (2019): 1–4. http://dx.doi.org/10.1109/tmag.2019.2900561.

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Guo, Song, Xiangdong Su, and Hang Zhao. "Optimal Design of an Interior Permanent Magnet Synchronous Motor for Electric Vehicle Applications Using a Machine Learning-Based Surrogate Model." Energies 17, no. 16 (2024): 3864. http://dx.doi.org/10.3390/en17163864.

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This paper presents an innovative design for an interior permanent magnet synchronous motor (IPMSM), targeting enhanced performance for electric vehicle (EV) applications. The proposed motor features a double V-shaped rotor structure with irregular ferrite magnets embedded in the slots between the permanent magnets. This design significantly enhances torque performance. Furthermore, a machine learning-based surrogate model is developed by integrating fine and coarse mesh data. Optimized using the Non-dominated Sorting Genetic Algorithm II (NSGA-II), this surrogate model effectively reduces com

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Zhang, Zhiwei, and Libing Zhou. "Design And Rotor Geometry Analysis Of Permanent Magnet–Assisted Synchronous Reluctance Machines Using Ferrite Magnet." Journal of Electrical Engineering 66, no. 6 (2015): 311–16. http://dx.doi.org/10.2478/jee-2015-0051.

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Abstract Various electric machines can be the candidate for electric vehicles applications, including induction machines, permanent magnet synchronous machines, switched reluctance machines, etc. Another class of machine, which has been relatively ignored, is synchronous reluctance machines. In order to enhance and increase torque density of pure synchronous reluctance machines, the low cost permanent magnet can be inserted into rotor lamination to contribute torque production, which is so-called permanent magnet-assisted synchronous reluctance machines. This paper presents the design and roto

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Yu, Bo, Qi Li, Wenhua Jiao, Shiyang Zhang, and Yongjun Zhu. "SAB-YOLOv5: An Improved YOLOv5 Model for Permanent Magnetic Ferrite Magnet Rotor Detection." Mathematics 12, no. 7 (2024): 957. http://dx.doi.org/10.3390/math12070957.

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Surface defects on the permanent magnetic ferrite magnet rotor are the primary cause for the decline in performance and safety hazards in permanent magnet motors. Machine-vision methods offer the possibility to identify defects automatically. In response to the challenges in the permanent magnetic ferrite magnet rotor, this study proposes an improved You Only Look Once (YOLO) algorithm named SAB-YOLOv5. Utilizing a line-scan camera, images capturing the complete surface of a general object are obtained, and a dataset containing surface defects is constructed. Simultaneously, an improved YOLOv5

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Kim, Hae-Joong, Doo-Young Kim, and Jung-Pyo Hong. "Structure of Concentrated-Flux-Type Interior Permanent-Magnet Synchronous Motors Using Ferrite Permanent Magnets." IEEE Transactions on Magnetics 50, no. 11 (2014): 1–4. http://dx.doi.org/10.1109/tmag.2014.2323818.

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Yoon, Keun-Young, and Soo-Whang Baek. "Performance Improvement of Concentrated-Flux Type IPM PMSM Motor with Flared-Shape Magnet Arrangement." Applied Sciences 10, no. 17 (2020): 6061. http://dx.doi.org/10.3390/app10176061.

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This study demonstrates that the use of a flared-shape rotor structure in interior permanent magnet (IPM) permanent magnet synchronous motor (PMSM) yields better performance than the basic IPM PMSM motor, using a spoke structure with ferrite magnets. To concentrate the effective magnetic flux, the proposed rotor structure is composed of a number of ferrite magnets, which are inserted in a flared shape in the rotor core. This paper shows the comparison with the analysis results of 2D finite element method (FEM), and it is shown that the proposed IPM PMSM motor can be an effective substitute for

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Bochkarev, Igor, Vadim Khramshin, Zhalalidin Galbaev, and Aida Sandybaeva. "Design of electromechanical brake mechanisms with permanent magnets as braking power source." Известия высших учебных заведений. Электромеханика 67, no. 4 (2024): 55–67. http://dx.doi.org/10.17213/0136-3360-2024-3-55-67.

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The aim of this research is to develop new design solutions for frictional brake mechanisms with permanent magnets and propose their structural analysis including heating of their active parts during operation. Standard technical recom-mendations applied for this brake type were used in the design process. To confirm compliance with the obtained rec-ommendations, experimental investigations were carried out using frictional brake mechanisms with the braking torque of 20 Nm with the permanent magnet made from barium ferrite 24BA210. The proposed general layout frictional brake mechanisms with p

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Islam, Md Zakirul, Seungdeog Choi, Malik E. Elbuluk, Sai Sudheer Reddy Bonthu, Akm Arafat, and Jeihoon Baek. "Design of External Rotor Ferrite-Assisted Synchronous Reluctance Motor for High Power Density." Applied Sciences 11, no. 7 (2021): 3102. http://dx.doi.org/10.3390/app11073102.

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The rare-earth (RE) permanent magnets (PM) have been increasingly adopted in traction motor application. However, the RE PM is expensive, less abundant, and has cost uncertainties due to limited market suppliers. This paper presents a new design of a RE-free five-phase ferrite permanent magnet-assisted synchronous reluctance motor (Fe-PMaSynRM) with the external rotor architecture with a high saliency ratio. In such architecture, the low magnetic coercivity and demagnetization risk of the ferrite PM is the challenge. This limits the number of flux barriers, saliency ratio, and reluctance torqu

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Afinowi, I. A. A., Z. Q. Zhu, Y. Guan, Jean-Claude Mipo, and P. Farah. "Switched-flux machines with hybrid NdFeB and ferrite magnets." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 456–72. http://dx.doi.org/10.1108/compel-03-2015-0112.

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Purpose – The purpose of this paper is to comparatively study the conventional, i.e. single magnet, and novel hybrid-magnet switched-flux permanent-magnet (HMSFPM) machines. Design/methodology/approach – The HMSFPM machines utilize two magnet types, i.e. low-cost ferrites and NdFeB. Thus, a set of magnet ratios (?), defined as the quotient of the NdFeB volume to the total PM volume, is introduced. This allows any desired performance and cost trade-off to be designed. Series- and parallel-excited magnet configurations are investigated using 2-dimensional finite element analysis. Findings – The

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Sulaiman, Syidatul Akma, and Akm Nurul Amin. "Development of Mathematical Equation for Chip Serration Frequency in End Milling of Titanium Alloy (Ti6Al4V) under the Influence of Magnetic Field from Permanent Magnets." Applied Mechanics and Materials 554 (June 2014): 170–74. http://dx.doi.org/10.4028/www.scientific.net/amm.554.170.

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Machining of metals is generally accompanied by a violent relative vibration between work and tool, known as chatter. Chatter arises due to resonance when the vibrations of the instability of chip formation and the natural vibration modes of the machine-system components coincide. This paper focuses on a novel approach of minimizing chatter in end milling of Titanium alloy (Ti6Al4V) under magnetic field from permanent magnets. The method consists of two ferrite permanent magnet bars (dimensions: 1′′ x 6′′ x 3′′), mounted 5mm from the cutting tool using a specially designed fixture, to provide

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Verma, Amitabh, O. P. Pandey, and Puneet Sharma. "ChemInform Abstract: Strontium Ferrite Permanent Magnet-An Overview." ChemInform 32, no. 38 (2010): no. http://dx.doi.org/10.1002/chin.200138258.

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Faiz, Jawad, Tohid Asefi, and Mohammad Khan. "Design of dual rotor axial flux permanent magnet generators with ferrite and rare-earth magnets." Facta universitatis - series: Electronics and Energetics 33, no. 4 (2020): 553–69. http://dx.doi.org/10.2298/fuee2004553f.

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This article addresses dual rotor axial flux Ferrite permanent magnet (PM) generator, as an alternative to a surface mounted and spoke types Nd-Fe-B generator which have concentrated windings. The performance parameters of all generators, particularly the efficiency, are identical. The design objective function is the generators mass minimization using a population-based algorithm. To predict the performance of the generators a finite element (FE) technique is applied. Besides, the aims of the design include minimizing cogging torque, examining different rotor pole topologies and different pol

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Al-ani, M. M. J., and Z. Q. Zhu. "Novel switched flux machine with radial and circumferential permanent magnets." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 473–92. http://dx.doi.org/10.1108/compel-03-2015-0114.

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Purpose – The paper purposes a novel SFPM machine topology with radial and circumferential permanent magnets (PMs). The paper aims to discuss this issue. Design/methodology/approach – In order to reduce the flux leakage in the stator-outer region and consequently achieve higher magnetic material utilization in switched flux permanent magnet (SFPM) machine, a novel topology with radial and circumferential PMs is proposed. This topology (SFRCPM) has the same structure as conventional SFPM (CSFPM) machine except of the additional set of radially magnetized PMs located around the back iron and sur

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Silong Li, Yingjie Li, and Bulent Sarlioglu. "Partial Irreversible Demagnetization Assessment of Flux-Switching Permanent Magnet Machine Using Ferrite Permanent Magnet Material." IEEE Transactions on Magnetics 51, no. 7 (2015): 1–9. http://dx.doi.org/10.1109/tmag.2015.2405898.

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Won, Hoyun, Yang-Ki Hong, Minyeong Choi, et al. "Novel Design of Six-Phase Spoke-Type Ferrite Permanent Magnet Motor for Electric Truck Application." Energies 15, no. 6 (2022): 1997. http://dx.doi.org/10.3390/en15061997.

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This paper proposes a 300 kW 24-slot/10-pole 6-phase stator-shifted fractional-slot concentrated winding spoke-type ferrite permanent magnet machine for electric truck applications. The proposed motor consists of a stator with dual three-phase windings positioned 75 degrees apart to reduce higher-order MMF harmonic order, and a rotor with an inexpensive and high-resistance ferrite permanent magnet in the spoke configuration. The simulated result of the stator-shifted machine is compared with a fabricated stator-shifted machine, and the results show good agreement with each other. To further re

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Delić, Sead, Amer Smajkić, Edgar Dullni, Sergio Santamaria, Nenad Uzelac, and Mirsad Kapetanović. "Analysis and Tests of the Impact of Permanent Magnets on Current Interruption in a Medium Voltage Rotary Load Break Switch." B&H Electrical Engineering 15, no. 1 (2021): 43–53. http://dx.doi.org/10.2478/bhee-2021-0005.

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Abstract The breaking capacity of a medium voltage (MV) rotary SF6 load break switch (LBS) can be improved by incorporating permanent magnets into the stationary contacts. The magnetic field is intended to blow the switching arc root towards a recessed space at the stationary contacts thereby preventing reignition of the arc after current zero. Making and breaking tests of load current 630 A were performed comparing the switching performance of load break switches equipped without a permanent magnet, with a ferrite and with a neodymium magnet. The impact of different polarity arrangements of t

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Ullah, Basharat, Faisal Khan, Muhammad Qasim, et al. "Lumped Parameter Model and Electromagnetic Performance Analysis of a Single-Sided Variable Flux Permanent Magnet Linear Machine." Energies 14, no. 17 (2021): 5494. http://dx.doi.org/10.3390/en14175494.

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A new Single-sided Variable Flux Permanent Magnet Linear Machine with flux bridge in mover core is proposed in this paper. The flux bridge prevents the leakage flux from the mover and converts it into flux linkage, which greatly influences the performance of the machine. First, a lumped parameter model is used to find the suitable coil combination and no-load flux linkage of the proposed machine, which greatly reduces the computational time and drive storage. Secondly, the proposed machine replaces the expensive rare earth permanent magnets with ferrite magnets and provides improved flux contr

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Guzmán-Mínguez, Jesús Carlos, Cecilia Granados-Miralles, Patrick Kuntschke, et al. "Remanence Increase in SrFe12O19/Fe Exchange-Decoupled Hard-Soft Composite Magnets Owing to Dipolar Interactions." Nanomaterials 13, no. 14 (2023): 2097. http://dx.doi.org/10.3390/nano13142097.

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In the search for improved permanent magnets, fueled by the geostrategic and environmental issues associated with rare-earth-based magnets, magnetically hard (high anisotropy)-soft (high magnetization) composite magnets hold promise as alternative magnets that could replace modern permanent magnets, such as rare-earth-based and ceramic magnets, in certain applications. However, so far, the magnetic properties reported for hard-soft composites have been underwhelming. Here, an attempt to further understand the correlation between magnetic and microstructural properties in strontium ferrite-base

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Xu, Chang Ying, Quan Min Li, and Chun Ling Huo. "Design of External-Rotor Ferrite Permanent Magnet BLDC Motor." Advanced Materials Research 383-390 (November 2011): 503–8. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.503.

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In this article, the general design of external-rotor ferrite permanent magnet BLDC motor is required. Based on the principle of cost reduction, we designed and manufactured motor prototype, and simulated it with the finite element method for electromagnetic field, and had no load and load test to verify the legitimacy of motor design parameters. We made a system test of fan-driven by a prototype, and the measured data showed that the external-rotor brushless DC motor had good performance and lower cost and had the advantages for industrial production.

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Adăscăliței, Cristina, Radu Andrei Marțiș, Petros Karaisas, and Claudia Steluța Marțiș. "In-Depth Exploration of Design and Analysis for PM-Assisted Synchronous Reluctance Machines: Implications for Light Electric Vehicles." Machines 12, no. 6 (2024): 361. http://dx.doi.org/10.3390/machines12060361.

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In electric or hybrid vehicles’ propulsion systems, Permanent Magnet-Assisted Synchronous Reluctance Machines represent a viable alternative to Permanent Magnet Synchronous Machines. Based on previous research work, the present paper proposes, designs, and optimizes two ferrite PMaSynRM topologies, analyzed against a reference machine (also PMaSynRM) with improved torque ripple content, based on similar specifications and dimensional constraints. Considering the trend of increasing the DC voltage level in electric and hybrid vehicles, the optimal topology is included in an analysis of the DC v

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Arestova, Iliyana Ilieva. "A Study of Nonreciprocal Coupled Ferrite-Dielectric Image Guide Structure for Ka-band." European Journal of Engineering Research and Science 4, no. 7 (2019): 46–50. http://dx.doi.org/10.24018/ejers.2019.4.7.1423.

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The nonreciprocal coupled ferrite-dielectric image guide structure with the same geometry as in our previous experimental investigation has been studied numerically by finite element method in the frequency range 26–40 GHz. The ferrite element in the experiment has been inhomogeneously magnetized by using a disk-shaped permanent magnet, whose diameter is comparable with the length of the ferrite bar. Recently, we have modelled the ferrite element as homogeneously magnetized perpendicularly to the ground plane and the direction of propagation. This homogeneous magnetization represents first app

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Arestova, Iliyana Ilieva. "Study of Nonreciprocal Coupled Ferrite-Dielectric Image Guide Structure for Ka-band." European Journal of Engineering and Technology Research 4, no. 7 (2019): 46–50. http://dx.doi.org/10.24018/ejeng.2019.4.7.1423.

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The nonreciprocal coupled ferrite-dielectric image guide structure with the same geometry as in our previous experimental investigation has been studied numerically by finite element method in the frequency range 26–40 GHz. The ferrite element in the experiment has been inhomogeneously magnetized by using a disk-shaped permanent magnet, whose diameter is comparable with the length of the ferrite bar. Recently, we have modelled the ferrite element as homogeneously magnetized perpendicularly to the ground plane and the direction of propagation. This homogeneous magnetization represents first app

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Yang, Kai, Lu Zhang, Mengyao Wang, and Chunyu Du. "Performance Comparison and Optimization of a PMSM Based on Hybrid-Type Permanent Magnet with Two Kinds of Rotor Topology." Energies 17, no. 3 (2024): 557. http://dx.doi.org/10.3390/en17030557.

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This study focuses on designing and optimizing Permanent Magnet Synchronous Motors (PMSMs) using hybrid rare earth and ferrite materials. Two distinctive rotor topologies of the Hybrid-Type Permanent Magnet Motor (HTPMM) are proposed: series and parallel magnetic circuits. Initially, the rotor topology and magnetic circuit principles of both the prototype and the designed HTPMM are introduced. Subsequently, a multi-objective genetic algorithm is employed to optimize the two HTPMMs, determining the final optimized parameters. Thise study further analyzes the cost advantage of HTPMMs from the pe

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