Rotor, and propeller driving device and aircraft using the same

A propeller driving device comprising:

• a housing in which an upper cover and a lower cover having a plurality of through holes are respectively coupled to an upper portion and a lower portion of a cylindrical case;
• a stator arranged inside the case;
• a rotor arranged at a distance from the stator;
• and
• a rotary shaft connected to the rotor through a plurality of bridges and having both ends rotatably supported by an upper bearing and a lower bearing positioned at respective centers of the upper cover and the lower cover,
• further comprising a stator support having heat dissipation characteristics while surrounding a stator coil wound on the insulator while insulating spaces between adjacent coils, wherein the stator support is integrally formed by insert-molding an insulating heat dissipation composite material having heat dissipation performance and insulation performance,
• wherein inner cooling of a motor is formed by an air flow passage that passes through a plurality of through holes of the upper cover and the lower cover and a plurality of spaces formed between the plurality of bridges,
• wherein the stator comprises:
• 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 on which a coil is wound in each of the plurality of teeth;
• and a stator coil wound around an outer circumferential surface of the insulator in each of the plurality of teeth, wherein the insulator is formed of an insulating heat dissipation composite material having both heat dissipation performance and insulation performance.