NDLI: Composite Bonded Magnets With Self-Recoverability <newline/>for Miniaturized Anisotropic Magnet Rotor

Content Provider	IEEE Xplore Digital Library
Author	Yamashita, F. Yamada, O. Ohya, S. Kobayashi, O. Nakano, M. Fukunaga, H.
Copyright Year	1965
Abstract	In the preparation of a miniaturized rotor, a composite bonded magnet was fabricated by taking advantage of self-recoverability. A preformed magnet was synthesized by using incomplete three-dimensional network molecular structure which was formed under the optimum conditions at a temperature of 433 K, an alignment field of 1.4 MA/m, and a low compacting pressure of 50 MPa, respectively. The preformed ones were extruded and compressed into a ring-shaped magnet by using the self-recoverability at a pressure of 200 MPa and a temperature of 423 K under non-alignment-field. Through the process, a composite bonded magnet rotor in the shape of a ring could be prepared without a bonding layer. It was clarified that a 4 pole/6 slot DC brush less motor can be obtained by using the ring-shaped rotor comprising a parallel oriented anisotropic magnet with 7 mm in outer diameter, 158 in , and 6.2 in density, respectively. Resultantly, the developed rotor enabled us to increase the S-T gradient by 1.75 times compared with that for a conventional isotropic Nd-Fe-B bonded magnet rotor with the same dimensions.
Sponsorship	IEEE Magnetics Society
Starting Page	1978
Ending Page	1981
Page Count	4
File Size	976417
File Format	PDF
ISSN	00189464
Volume Number	46
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnets Bonding Anisotropic magnetoresistance Rotors Magnetic materials Temperature Brushless motors Magnetic properties Remanence Powders self-recoverable binder system Anisotropic bonded magnet rotor anisotropic rare earth bonded magnet DC brushless motor
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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