Download or read book Soft Magnetic Composites in Novel Designs of Electrical Traction Machines written by Zhang, Bo and published by KIT Scientific Publishing. This book was released on 2017-07-19 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, the manufacturing of electrical machines based on electrical steel laminations has been well established worldwide. Compared with the electrical steel, the soft magnetic composites (SMC) shows magnetic isotropy and lower eddy current losses. Thus, it becomes an important impulse promoting the development of new topologies of electrical machine. The application of SMC in the electrical traction machine for hybrid electrical vehicle or electrical vehicle has been researched in the work.
Download or read book Soft Magnetic Composites in Novel Designs of Electrical Traction Machines written by Bo Zhang and published by . This book was released on 2020-10-09 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, the manufacturing of electrical machines based on electrical steel laminations has been well established worldwide. Compared with the electrical steel, the soft magnetic composites (SMC) shows magnetic isotropy and lower eddy current losses. Thus, it becomes an important impulse promoting the development of new topologies of electrical machine. The application of SMC in the electrical traction machine for hybrid electrical vehicle or electrical vehicle has been researched in the work. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.
Download or read book Application of Soft Magnetic Composites in Electrical Machines written by Phillip George Dickinson and published by . This book was released on 2003 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Iron based Soft Magnetic Composites with Novel Coating Materials written by Benjamin Dyer and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soft Magnetic Composites and Their Use in Electrical Machines written by UK Magnetics Society and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel Magnetic Composites for High Frequency Applications written by Xiaokai Zhang and published by ProQuest. This book was released on 2009 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic materials are widely used in high frequency from radio wave and microwave range. In some cases, high loss may be desired in applications such as heating and EM wave absorption. In most applications such as power transformers, DC-DC converters, etc., low loss is required to achieve a non-dispersive (frequency-independent) permeability spectrum with high value. In this dissertation work, we focused on four kinds of magnetic composites, which aimed at different AC applications: (1) First type of material is soft/semi-hard ferrite, which can work as heating elements in few MHz AC field with self-temperature control. The self-temperature regulation in such material has been demonstrated and the heat generation based on magnetic properties has been evaluated quantitatively throughout this research work. (2) Novel materials with simultaneously high permeability, high induction and high operating frequency are also been studied. Laminated nano-flakes structures based on iron, cobalt, nickel or their alloys have been developed in this work. Based on such structure, a new high frequency magnetic material was achieved with much higher Snoek's limit than ferrite and much lower loss than conventional metallic magnetic materials. (3) In addition to magnetic permeability, dielectric permittivity is another fundamental physical parameter. By using a material with matched high permeability and permittivity values, one can not only miniaturize the device size, but also maintain the impedance matching with surrounding space. Such magneto-dielectric materials with flake inclusions have been proposed and were demonstrated to have matched permeability/permittivity values up to 1GHz. (4) Meanwhile, materials with negative permeability and permittivity allow energy propagation direction in the opposite of wave propagation direction, giving rise to unusual behaviors such as inversed refraction. In this work, we proposed a method to achieve such "left-handed materials" based on magnetic material and demonstrated possible negative index of refraction in magnetic composite thin film.
Download or read book Soft Magnetic Composites Motor Design Issues and Applications written by Lars O. Hultman and published by . This book was released on 2000 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Application of Magnetic Hysteresis Modeling to the Design and Analysis of Electrical Machines written by Maged Ibrahim and published by . This book was released on 2015 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: Permanent magnet synchronous machines (PMSMs) with rare-earth magnets are widely used in the traction drives of electrical and hybrid electrical vehicles, as they can provide high efficiency and torque density. Due to the possibility of future shortage of rare-earth materials, it is essential for electric vehicle industry to find alternative magnet technologies that can provide a substitute for rare-earth PMSMs. Permanent magnet machines with Alnico magnets can theoretically provide torque densities comparable to rare-earth PMSMs, due to their high remnant flux density. However, these magnets are rarely used in the conventional designs of PMSMs, as they can be demagnetized by the armature field. The thesis presents a novel design for permanent magnet machines with Alnico magnets. The proposed design can provide high air gap flux density at no-load, and the armature field at full load tends to enhance the magnet flux. Therefore, the machine can operate with high torque density even under severe loading conditions. The demagnetization characteristics of Alnico magnets are also utilized to achieve high efficiency at a wide speed range, as the magnet flux is reduced at high speeds by armature current pulses that dissipate negligible losses, thus avoiding the additional copper losses of the continuous flux weakening current in conventional rare-earth PMSMs. The simulation of the demagnetization and magnetization dynamics of the proposed machine design requires considering the hysteresis characteristics of the permanent magnets. Therefore, finite element analysis (FEA) simulations for the designed machine are performed using a linearized hysteresis model for Alnico magnets. The thesis also aims to improve the design and modeling of electrical machines by developing computationally efficient methods for incorporating the hysteresis characteristics of electrical steel into electrical machine models.
Download or read book Multidisciplinary Design Optimization Methods for Electrical Machines and Drive Systems written by Gang Lei and published by Springer. This book was released on 2016-02-05 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents various computationally efficient component- and system-level design optimization methods for advanced electrical machines and drive systems. Readers will discover novel design optimization concepts developed by the authors and other researchers in the last decade, including application-oriented, multi-disciplinary, multi-objective, multi-level, deterministic, and robust design optimization methods. A multi-disciplinary analysis includes various aspects of materials, electromagnetics, thermotics, mechanics, power electronics, applied mathematics, manufacturing technology, and quality control and management. This book will benefit both researchers and engineers in the field of motor and drive design and manufacturing, thus enabling the effective development of the high-quality production of innovative, high-performance drive systems for challenging applications, such as green energy systems and electric vehicles.
Download or read book Integrated Electromagnetic and Electrothermal Analysis for Improved Design of Actuators motors with Soft Magnetic Composite Cores written by Daniel R. Luedtke and published by . This book was released on 2006 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Properties of Polymer Bonded Soft Magnetic Composites written by Bernhard Weidenfeller and published by . This book was released on 2008 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimization of Soft Magnetic Composites for the Design of Electromagnetic Devices written by L. P. Lefebvre and published by . This book was released on 2001 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Feasibility Study of Non homogeneous Soft Magnetic Core for Electrical Machines an Application of Additive Manufacturing written by Thang Quoc Pham and published by . This book was released on 2021 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a new generation of energy efficient, high torque and power density electrical machines is part of a solution toward the global energy problem. An important step in improving electrical machine performance involves optimization of the machine geometry, winding configuration, and overcoming limitations within traditional magnetic materials. In electrical machine, the magnetic iron core accounts for a significant portion of its weight and size. Under a rotating magnetic field, conventional iron cores are subjected to a nonuniform magnetic field distribution. This leads to uneven saturation distribution, extra core loss, and sub-optimal utilization of the permeability at certain regions within the iron cores. Deploying materials with non-homogeneous magnetic permeability can lead to a more uniform magnetic flux density distribution and potentially better power density. Additionally, a multi-permeability iron core, where the permeability is tuned as a function of both position and electrical machine performance, can lead to a more efficient use of the core and an additional degree of freedom for core design. This work evaluates the use of iron cores with non-homogeneous magnetic permeability for electrical machines. It is numerically demonstrated that an iron core with spatially tuned permeability can be used to manipulate the airgap flux density waveform, torque, and iron loss in electrical machines.Exploration and exploitation of non-homogeneous iron cores for electrical machines requires an accurate, low cost modelling technique. Finite element analysis can be used to model non-homogeneous iron cores but it can lead to an expensive computational requirement. Traditional magnetic equivalent circuits can provide quick estimation of the electrical machine performance in comparison to finite elements. However, this technique typically models just the main flux path and/or ignores the permeability in the iron cores. In this work, a technique is developed to model non-homogeneous, multi permeability iron cores in electrical machines. It is shown that the proposed technique closely approximates finite element results and reduces the simulation time nearly 80%. It is also demonstrated that the modelling technique can be integrated into a multi-objective optimization problem for development of novel iron cores.Additive manufacturing, also known as 3D-printing, is a layer-based manufacturing technique which can fabricate unique, complex shapes. It also has the potential to fabricate non-homogeneous iron cores. Adoption of these complex iron cores for development of high performance electrical machines requires understanding of the magnetic properties and demonstration that printed iron cores can reach variable levels of permeability. In this work, the B-H characteristics are experimentally extracted using conventional magnetic characterization techniques. A simplified magnetic anisotropy test bed was developed to quantify levels of magnetic anisotropy. It is shown that 3D-printed iron cores can achieve different levels of relative permeability and low levels of magnetic anisotropy.
Download or read book Soft Magnetic Composites for High Frequency Applications written by Han Song and published by . This book was released on 2015 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soft magnetic composites, consisting of fine metallic particles in a non-magnetic, insulating matrix, have great potential for integrated inductor and antenna applications. The dielectric and magnetic properties of soft magnetic composites can be tailored by the choice of matrix as well as particle composition, size, and concentration for reduction in device footprint and improvement in performance. In particular, unlike conventional single-phase materials, magnetic anisotropy in the composites can be controlled by choice of particle shape and alignment to overcome the Snoek's limit, enabling both high permeability and high ferromagnetic resonance frequency. To develop a soft magnetic composite with 1) high permeability, 2) high ferromagnetic resonance frequency, 3) low hysteresis loss, and 4) low eddy current loss, material design considerations are first examined in terms of magnetic particle design and matrix design. The effects of constituent particle shape and alignment, volume fraction, and composite shape on microstructural and magnetic properties are studied in Ni-Fe microdisk composites and NiFe2O4 nanocomposites. The total magnetic anisotropy of the composites is determined by the sometimes-competing influences of composite demagnetizing field and particle shape anisotropy. To lift the Snoek's limit and obtain simultaneous high permeability and high ferromagnetic resonance frequency, planar magnetic anisotropy is introduced to the composites by aligning the shape anisotropy of individual Ni-Fe microdisks in an in-plane rotating field. This planar alignment process is investigated by a systemic experimental and theoretical study of magnetic disk rotation in a Newtonian fluid, which yields insights necessary for both alignment process optimization and magnetic anisotropy fine-tuning. Finally, the magnetic alignment process is integrated to an inkjet printer, and magnetic samples with arbitrary aligned anisotropy are demonstrated by printing a magnetic nanoparticle bearing ink.
Download or read book Multiphysics Simulation by Design for Electrical Machines Power Electronics and Drives written by Marius Rosu and published by John Wiley & Sons. This book was released on 2017-12-18 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents applied theory and advanced simulation techniques for electric machines and drives This book combines the knowledge of experts from both academia and the software industry to present theories of multiphysics simulation by design for electrical machines, power electronics, and drives. The comprehensive design approach described within supports new applications required by technologies sustaining high drive efficiency. The highlighted framework considers the electric machine at the heart of the entire electric drive. The book also emphasizes the simulation by design concept—a concept that frames the entire highlighted design methodology, which is described and illustrated by various advanced simulation technologies. Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives begins with the basics of electrical machine design and manufacturing tolerances. It also discusses fundamental aspects of the state of the art design process and includes examples from industrial practice. It explains FEM-based analysis techniques for electrical machine design—providing details on how it can be employed in ANSYS Maxwell software. In addition, the book covers advanced magnetic material modeling capabilities employed in numerical computation; thermal analysis; automated optimization for electric machines; and power electronics and drive systems. This valuable resource: Delivers the multi-physics know-how based on practical electric machine design methodologies Provides an extensive overview of electric machine design optimization and its integration with power electronics and drives Incorporates case studies from industrial practice and research and development projects Multiphysics Simulation by Design for Electrical Machines, Power Electronics and Drives is an incredibly helpful book for design engineers, application and system engineers, and technical professionals. It will also benefit graduate engineering students with a strong interest in electric machines and drives.
Download or read book High Strength Soft Magnetic Composites written by Ronghai Yu and published by . This book was released on 2001 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been an increasing demand for high temperature soft magnetic materials with mechanical properties better than those of existing commercial materials such as FeCo alloys. We have designed new magnetic composites by reinforcing FeCo alloys with high strength tungsten fibers. The composite materials were fabricated by electrodeposition. In general, the as deposited composites have a relatively high coercivity H(sub c) and low magnetic permeability Micro, because of induced strain during fabrication. After appropriate thermal annealing, the composites have good soft magnetic properties, comparable to commercial bulk alloys. However, the saturation induction is reduced due to the non-magnetic inclusions. The composites also show significant enhancements in yield strength and tensile strength that increases linearly with fiber volume fraction as seen in other common composite materials. In addition, near zero creep is observed at 600 deg C under a stress of 600 Mpa. The mechanical properties can be further improved by co-depositing soft magnetic material and Al2O3 onto the fibers. An approximately linear relationship was observed between the coercivity and volume fraction of Al2O3 particles. The square-root relationship was observed between the hardness and the Al2O3 concentration.
Download or read book IAS 98 written by IEEE Industry Applications Society. Meeting and published by . This book was released on 1998 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt:
