Hitachi Automotive Systems, Ltd.

Yoshimi Kurahara

Koji Obata

Shuya Hagiwara

A rotating electric machine includes: a stator including a stator core, slots provided in the stator core at equal intervals along the circumferential direction, and coils placed in the stator slots and configured to generate a rotating magnetic field; and a rotor rotatably provided with a predetermined rotation gap between the stator core and the rotor, wherein the rotating electric machine further includes a first varnish applied between the slots in the stator core and the coils for impregnation, and a second varnish applied directly onto enamel coating of the coils outside of the slots in the axial direction, the first varnish is a thermosetting varnish having a shear bond strength of a flat wire between the coils and the varnish is higher than that of the second varnish, and the second varnish is a thermosetting varnish having a glass transition temperature of approximately 104&#xb0; C. or lower and the glass transition temperature of the second varnish by the Dynamic Mechanical Analysis (DMA) method is lower than that of the first varnish.

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Tokyo, Japan

Yoshimi Kurahara