Patent
Low loss magnet and magnetic circuit using the same
TLDR
In this paper, a lamellar high resistance layer having resistivity ten times or higher than that of a mother phase containing iron or cobalt is formed and an oxygen content is controlled to 10 to 10000 ppm so that the reliability and residual magnetic flux density are increased.Abstract:
A lamellar high resistance layer having resistivity ten times or higher than that of a mother phase containing iron or cobalt is formed and an oxygen content is controlled to 10 to 10000 ppm so that the reliability and residual magnetic flux density are increased.read more
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Patent
Rotor and permanent magnet rotating machine
TL;DR: In this paper, the coercive force near the surface of the magnet piece is higher than that in the interior of magnet piece, and the rotor wherein each of the permanent magnet segments is an assembly of further divided permanent magnet pieces, the rotor and the stator being disposed to define a gap therebetween.
Patent
Sintered magnet and rotating machine equipped with the same
TL;DR: The sintered magnet and the rotating machine equipped with the same are disclosed in this paper, where the authors describe the sintering magnet and a rotating machine that includes crystal grains of a ferromagnetic material consisting mainly of iron, and a fluoride compound or oxyfluoride compound layer containing at least one element selected from an alkali metal element, a rare earth element and a metal element.
Patent
Permanent magnet for motor, and method for manufacturing the permanent magnet for motor
Izumi Ozeki,Katsuya Kume,Junichi Nakayama,Yuuki Fukuda,Toshinobu Hoshino,Tomokazu Horio,Kenji Nakamura +6 more
TL;DR: In this paper, a permanent magnet for a motor is proposed, which is free from the problems of temperature elevation and coercive force depression, therefore making it possible to provide a high power small-sized motor.
Patent
Rotor for axial air gap-type permanent magnetic rotating machine
TL;DR: An axial gap-type permanent magnetic rotating machine as discussed by the authors is a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments circumferentially arranged on a surface of the yoke such that each permanent magnet segment may have a magnetization direction parallel to the rotation axis.
Patent
Electric Rotating Machine and Automobile Equipped with It
TL;DR: In this article, an electric rotating machine including a stator with a rotor core and a plurality of permanent magnets held by the rotor core is described, where the permanent magnet is a rare earth magnet made of rare earth magnetic particles bound with SiO2.
References
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Patent
Rare-earth magnet
TL;DR: In this paper, a rare-earth element and fluorine is formed at the grain boundary or near the powder surface of a ferromagnetic material containing at least one kind of rare earth element.
Patent
Nd-Fe-B MAGNET WITH MODIFIED GRAIN BOUNDARY AND PROCESS FOR PRODUCING THE SAME
Kenichi Machida,Shunji Suzuki +1 more
TL;DR: In this article, a method of modifying the grain boundary of Nd-Fe-B magnet, characterized in that a fluoride, oxide or chloride of metal element (M: Pr, DY, Tb or Ho) is subjected to reduction treatment so that there is effected diffusion infiltration of the metal element M from the surface of a sintered magnet having an Nd rich crystal grain boundary phase surrounding the circumferential part of the Nd2Fe14B main crystal into the grain surface.
Patent
R-Fe-(B,C) SINTERED MAGNET IMPROVED IN MAGNETIZABILITY AND ITS MANUFACTURING METHOD
Masato Sagawa,眞人 佐川 +1 more
TL;DR: In this article, a granular grain boundary phase is formed at a main phase crystal grain boundary, composed mainly of R 2 Fe 14 B crystals or a grain boundary tripple point.
Patent
Centrifugal casting method, centrifugal casting apparatus, and cast alloy produced by same
TL;DR: In this paper, the authors present a casting method which employs rapid solidification of metal, rare-earth metal or the like, as well as a casting apparatus and a cast alloy.
Patent
MRI apparatus with high-resistance magnet
TL;DR: A magnet which includes ferromagnetic powder to be mainly a mother phase containing iron or cobalt is provided with a high-resistance layer which has a resistance higher than or equal to ten times as high as a resistance of the mother phase as discussed by the authors.