Permanent Magnet Materials
نویسندگان
چکیده
منابع مشابه
Rare-earth Permanent Magnets: New Magnet Materials and Applications
The introduction of rare-earth permanent magnets based on samarium-cobalt in about 1970, and neodymium-iron-boron magnets in the mid-nineteen eighties, has ushered in a new era in hard magnetic materials. This has resulted in a dramatic improvement in permanent magnet performance, with neodymium-iron-boron (Nd2Fe14B) magnets having a magnetic energy product up to an order of magnitude greater t...
متن کاملPermanent magnets and hard magnetic materials
This review deals with the definition and development of hard magnetic materials with special emphasis on more recent developments in this field. After discussing the fundamental properties of all hard magnetic materials, based on the intrinsic and extrinsic properties, some remarks on the history of hard magnetic materials and permanent magnets are given. The important hard ferrites are only b...
متن کاملMagnetic Field Analysis of Permanent Magnet Motor With Magnetoanisotropic Materials Nd–Fe–B
In this paper, we propose the method to analyze the magnetization distribution in magnetoanisotropic materials by using the finite-element method considering the improved variable magnetization and Stoner–Wohlfarth model. By using this method, furthermore, the effect of the eddy currents induced in permanent magnets was analyzed. From the analyzed result, it is clarified how the magnetization d...
متن کاملDouble Layer Magnet Design Technique for Cogging Torque Reduction of Dual Rotor Single Stator Axial Flux Brushless DC Motor
Cogging torque is the major limitation of axial flux permanent magnet motors. The reduction of cogging torque during the design process is highly desirable to enhance the overall performance of axial flux permanent magnet motors. This paper presents a double-layer magnet design technique for cogging torque reduction of axial flux permanent magnet motor. Initially, 250 W, 150 rpm axial flux brus...
متن کاملApplications of Permanent Magnets in Accelerators and Electron Storage Rings
After an explanation of the general circumstances in which the use of permanent magnets in accelerators are desirable, a number of specific magnets are discussed. This discussion includes magnets needed for the opera tion of accelerators as well as magnets that are employed for the utilization of charged particle beams, such as the production of synchrotron radiation. Generic Advantages of Perm...
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