Mitsubishi Electric Corporation

Azusa Osawa

Naoki Yasuda

Takahiro Mabuchi

Motoki Masaki

Shinya Tokizaki

A thermosetting resin composition of the present disclosure includes an epoxy resin () containing a curing agent, and inorganic particles () having a rutile-type crystal structure and an average particle diameter of 500 nm or less. Further, a stator coil of the present disclosure includes a coil conductor (), and an insulating layer () obtained by winding an insulating tape around the coil conductor (), impregnating the insulating tape with the thermosetting resin composition, and molding the impregnated insulating tape by heating and pressurizing. In addition, a rotating electric machine of the present disclosure includes a stator core () having a slot (), in which the stator coil () is accommodated. According to the present disclosure, it is possible to obtain a thermosetting resin composition capable of achieving improvement in machine life through suppression of partial discharge and miniaturization and high output of the machine through improvement of a dielectric-breakdown electric field property, a stator coil obtained through use of the thermosetting resin composition, and a rotating electric machine.

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Chiyoda-ku, Japan

Azusa Osawa