Daido Steel Co., Ltd.

Yoshitomo Kajinami

Junichi Esaki

Yusuke Tozawa

Kousuke Yoshimoto

[Problem] Provided is an injection-molded reactor which has a further reduced loss when the reactor is in operation. [Solution Means] The injection-molded reactor is configured by injection-molding a core using a compound for a core so that a coil obtained by winding a electric wire is embedded in the core without leaving any space therein, the compound being a compound obtained by adding a low-melting-point resin B that has a melting point of 150&#xb0; C. or lower to a base resin A that is a highly heat-resistant resin with a melting point of 150&#xb0; C. or higher and that accounts for most of thermoplastic resins forming a resin binder, the melting point of the low-melting-point resin B being lower than that of the base resin A, and mixing the base resin A and the low-melting-point resin B as the thermoplastic resins with a soft magnetic powder in a proportion represented by the following expression (1):&#xb7;(soft magnetic powder)+(100&#x2212;)&#xb7;((100&#x2212;)&#xb7;(base resin)+Y&#xb7;(low-melting-point resin))&#x2003;&#x2003;expression (1)

Injection-molded reactor and compound used in same

[Problem] Provided is an injection-molded reactor which has excellent heat dissipation properties and in which the internal temperature of the core can be satisfactorily inhibited from rising due to heat generation when the reactor is in operation. [Solution Means] A material for a core obtained by mixing a soft magnetic powder, a resin binder, and a thermally conductive fibrous filler having a higher thermal conductivity than the soft magnetic powder in accordance with X&#xb7;(soft magnetic powder)+Y&#xb7;(thermally conductive filler)+(100-X-Y)&#xb7;(resin binder), wherein X, indicating the proportion of the soft magnetic powder, is 83 to 96% by mass and Y, indicating the proportion of the thermally conductive filler, is 0.2 to 6.8% by mass, is used to mold a coreso that a coilobtained by winding an electric wire is embedded therein without an interval, thereby configuring a reactor

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Nagoya, Japan

Yoshitomo Kajinami