Stator, and propeller driving apparatus and aircraft using the same

A stator for a propeller driving device, the stator comprising:

• a stator core having an annular back yoke having a predetermined width so as to form a magnetic circuit and a plurality of teeth extending from the back yoke in a central direction;
• an insulator formed to surround an outer circumferential surface of the stator core, the insulator being formed by a first insulating heat dissipation composite material;
• and
• a stator coil wound around an outer circumferential surface of the insulator in each of the plurality of teeth,
• a stator support having heat dissipation characteristics while surrounding the stator coil wound on the insulator and while insulating spaces between adjacent coils, the stator support being integrally formed of a second insulating heat dissipation composite material through an insert-molding,
• wherein the first insulating heat dissipation composite material and the second insulating heat dissipation composite material comprises:
• a polymer matrix having a continuous use temperature of about 150° C. or higher and serving as a binder;
• an insulating heat dissipation filler made of ceramic added to and dispersed in the polymer matrix to improve thermal conductivity;
• and reinforcing fibers added to the polymer matrix for strength reinforcement, and
• wherein a content of the insulating heat dissipation filler in the second insulating heat dissipation composite material is higher than that of the first insulating heat dissipation composite material.