Hitachi Automotive Systems, Ltd.

Shuya Hagiwara

Koji Obata

Genzo Iwaki

Yoshimi Kurahara

The present invention facilitates size and weight reduction by enhancing a coil space factor. A rotating electrical machine according to the present invention is provided with a core having a slot that is continuous in the axial direction, a winding provided within the slot, and an insulating member provided between the slot and the winding and is characterized in that a first pyramid-frustum surface of the insulating member that is provided on the side of the insulating member that is inserted into the slot and/or a second pyramid-frustum surface that is provided on the side of the insulating member into which the winding is inserted is provided at an axial end of the core.

Rotating electrical machine

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.

Growing community of inventors

Tokyo, Japan

Shuya Hagiwara