Honda Motor Co., Ltd.
Motor and ducted fan having heat radiation portions for cooling magnets

Abstract:

A motor includes: a rotor core which rotates about an axis; a plurality of magnets which extend in an axial direction of the axis inside the rotor core and are disposed in a circumferential direction; a shaft body which is disposed coaxially with the rotor core and has a hollow portion through which a fluid is able to pass from a first side to a second side in the axial direction; and a plurality of heat radiation portions which are disposed along the magnet in the circumferential direction and have a planar portion disposed to be parallel to a side surface of the magnet facing a radial direction, wherein the heat radiation portion extends to be closer to the second side than a second side core end surface located on the second side in the axial direction of the rotor core.