Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Fine Sinter Co., Ltd

Masaki Sugiyama

Takeshi Hattori

Shinjiro Saigusa

Daisuke Okamoto

Hidefumi Kishimoto

Masaki Hirano

Toshiya Yamaguchi

Shin Tajima

Takaaki Kiyono

Nobuki Shinohara

Mikio Kondoh

Yusuke Oishi

Junghwan Hwang

Hidenari Yamamoto

Shuji Yokota

Kiyoshi Higashiyama

Mitsutoshi Akiyama

Tadayoshi Kikko

Shota Ohira

The invention includes: powder preparation step of obtaining magnetic core powders by mixing, of magnetic powders with thermosetting resin powders in hot state; powder filling step of filling the obtained magnetic core powders into a die; a compaction step of compacting magnetic core powders; and compact heating step of heating, compacts to the elevated temperature state at which the thermosetting resin hardens after compaction.

Method of producing powder magnetic core and method of producing magnetic core powder

The disclosed reactor has a case and a cylindrical molded coil assembly which is disposed inside of the case and which is formed by covering a coil with a resin, wherein the coil assembly is sealed by an iron powder mixed resin to which iron powder has been admixed. The reactor has a pillar provided as a single body with the case, and one or multiple ring-shaped core members. The ring-shaped core members are disposed outside the outer surface of the pillar such that the pillar is inserted inside the inner surface of said ring-shaped core members, and the assembly coil is disposed outside the outer surface of the ring-shaped core members such that the ring-shaped core members are inserted inside the inner surface of said coil assembly. The ring-shaped core members are sealed by means of the aforementioned iron powder-mixed resin.

Reactor and reactor manufacturing method

In a reactor core, a gap section between a plurality of core material portions is fixed by adhesion through a spacer, and a resin is arranged vertical to the adhering surface between the core material and the spacer, for sandwiching at least a part of the core material. The resin material preferable a molded material.

Reactor core and reactor

An object of the present invention is to provide a method for producing a dust core wherein generation of iron oxide at grain boundaries in the dust core is unlikely to take place upon annealing of the dust core subjected to compaction, thus allowing excellent electromagnetic characteristics to be realized. Also, the following is provided: a method for producing a dust core, which comprises: a step of molding a magnetic powder comprising a powder for a dust core formed with an iron-based magnetic powder coated with a silicone resin into a dust core via compaction; and a step of annealing the dust core via heating so as to cause the silicone resin contained in the dust core to be partially formed into a silicate compound, wherein annealing of the dust core is carried out at a dew point of an inert gas of &#x2212;40&#xb0; C. or lower in an inert gas atmosphere in the annealing step.

Method for producing dust core

An insulation film whose requisite constituent elements are first elements and a second element. The first elements include B, P, O and Fe. The second element can generate cations whose hexa-coordinated ion radius, defined by Shannon, R. D., is 0.073 nm or more, and which are bivalent or more. Since the second element having a large ion radius is incorporated into network formers made from the first elements, it is possible to improve the heat resistance of the insulation film.

Insulation film, powder for magnetic core and powder magnetic core and processes for producing the same

Growing community of inventors

Miyoshi, Japan

Masaki Sugiyama