Title :
New preparation method of anisotropic and isotropic Nd-Fe-B-bonded magnet for small dc motors
Author :
Yamashita, Fumitoshi ; Watanabe, Akihiko ; Fukunaga, Hirotoshi
Author_Institution :
Motor Technol. Center, Matsushita Electr. Ind. Co. Ltd., Japan
Abstract :
We studied a new method of preparing a Nd-Fe-B-bonded magnets by compacting and rolling or stamping, and applications to small dc motors were examined. Consequently, we developed new preparation processes of Nd-Fe-B-bonded magnets using materials other than Nd-Fe-B melt-spun powder. It was found that applications of the prepared magnets to small dc motors improved their performance.
Keywords :
DC motors; boron alloys; densification; ferromagnetic materials; hydrogenation; iron alloys; neodymium alloys; permanent magnet motors; permanent magnets; powder metallurgy; rolling; small electric machines; HDDR; Nd-Fe-B; Nd-Fe-B-bonded magnets; anisotropic bonded magnet; compacting; hydrogen-decomposition-desorption-recombination; isotropic bonded magnet; preparation method; rolling; small dc motors; spheroidal powder; stamping; Anisotropic magnetoresistance; Bonding; DC motors; Fabrication; Magnetic anisotropy; Magnetic materials; Magnetic properties; Perpendicular magnetic anisotropy; Powders; Shape;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815740
