Nd-Fe-B permanent magnets
Micromagnetic Simulations of Magnetization Reversals in Nd Fe B Based Permanent Magnets
... of Nd-Fe-B permanent magnets such as grain size, grain shape, and grain boundary composition influence the magnetization reversals and ...the magnets with a smaller grain ...
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Optimization and comparison of flux-concentrating Nd-Fe-B generator considering variable power factor and wind conditions for a 6MW offshore wind turbine
... Permanent magnet synchronous generator (PMSG) has received much attention in wind energy operation because of their property of self-excitation (no need of field winding and unreliable slip ring and brush), which ...
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Method of making permanent magnets
... isotropic permanent magnet comprises atomizing a melt of a rare earth-transition metal alloy ...an Nd--Fe--B alloy enriched in Nd and B) under conditions to produce protectively ...
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Magnetoelastic anisotropy in NdFeB permanent magnets
... The influence of magnetoelastic effects on the anisotropy in NdFeB permanent magnets has been investigated. A relation between the magnetostriction coefficients and the magnetoelastic anisotropy is derived ...
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The thermal expansion of hard magnetic materials of the Nd-Fe-B system
... approximation dependences of the linear thermal expansion coefficient were obtained. The character of changes of the thermal coefficient of linear expansion in the region of the Curie point was specified. It was shown ...
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Experimental study of the transport properties of Nd-Fe-B and Sm-Co magnets
... Modern permanent magnets based on Nd-Fe-B and Sm-Co compounds have to date the highest characteristics, such as coercive force, residual magnetic induction and maximum magnetic ...
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On the limits of coercivity in permanent magnets
... , which is 4.2 nm, giving v ¼ 1.12d 3 . 33 Figure 2 gives the minimum energy path and the magnetization configuration at the saddle point of the energy landscape. At the saddle point, a small nucleus, which has an ...
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Nd-rich Effects on Structural and MagneticProperties of Nd2Fe14B Magnets
... sintered permanent magnets based rare-earth hard magnetic materials shows a high coercivity and large energy ...on Nd-Fe-B alloys prepared by the rapid quenching of the liquid, known as ...
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Search for magnets with properties intermediate between Nd Fe B and Ferrite
... strong magnets with the ability to operate at temperatures well over ...for Nd-Fe-B based magnets is approximately 60% of the total ac- cording to the estimated breakdown of the world ...
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Effect of Post-Sintering Annealing Treatment on Magnetic Properties of Some Nd Fe b Based Magnets
... responsible for the coercivity enhancements in these magnets, during the heat treatment processes. The present experiment has been undertaken in order to study the effect of post sintering annealing treatments at ...
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Application of Rotating Arms Type Permanent Magnet Motor
... type permanent magnet motor, in particular to a permanent magnet motor that was actuated by the action of the magnetic forces of a permanent magnet stator of a stator module and two thin ring ...
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The thermal expansion coefficient of Nd-Fe-B and Sm-Co permanent magnets in the region of the Curie point
... The instrumental error was determined on standard samples of fused silica (for low temperatures) and sintered alumina (for high temperatures). The results were reproduced within 0.2 µm. The systematic error of the LTEC ...
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Mechanical Properties of Injection-Molded Nd-Fe-B Type Permanent Magnets
... A strong dependence on the concentration of particles, as well as the type of particles was observed as well. While the tensile strength of PPS compounds decreased in general with increasing volume percentage of ...
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Low Power Valve Actuation Using Trans-Permanent Magnetics
... a permanent magnet can be regarded as a binary ...of magnets allow for the design of a valve with only a few ...of magnets instead of just a ...of magnets. In general, the stack can consist of ...
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2. Selection of Mechanism and Fabrication of Eddy Current Braking System for High Speed Automobiles
... the permanent magnet induces the line of magnetic flux of a nonferrous conducting object(aluminum) is moved in a perpendicular to the lines of magnetic flux, then the current induced is proportional to the ...
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Synthesis and Characterization of Directionally Solidified Nd- Fe-B alloys
... primary Fe grows along the pulling direction with secondary arms extending perpendicular to the growth ...of Nd-rich eutectic phase is also found to follow similar trend (Table ...
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Modification of the Interface Nanostructure and Magnetic Properties in Nd Fe B Thin Films
... the Nd overlayer and made the ...the Nd overlayer and the post-annealing are indispensable for the high coercivity in the present ...as-deposited Nd-Fe-B film ...
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Microstructure of Nd Rich Grain Boundary Phase in Die Upset Nd Fe Co Ga B Magnet
... longitudinal directions well align along the extrusion direction. One can also notice that there are a few portions of pools of the GB phase at some triple junctions. Such a texture accounts for about 90% of the magnet. ...
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Halbach Structures for Permanent Magnets Bearings
... illustrative calculations have been carried out with σ ∗ = J ~ · ~n = 1 T, where J ~ is the magnetic polarization vector and ~n is the unit normal vector. Moreover, the magnetic pole volume density exists for ring ...
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Electron Irradiation Induced Phase Transformation in Fe Nd B Alloys
... When lattice defects are introduced in a metastable crystal of rapid quenched specimen by electron irradiation, the Gibbs free energy of the defective metastable crystal increases to the energy indicated by the hatched ...
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