Electric motor and electric vehicle having the same

摘要

Disclosed are an electric motor and an electric vehicle having the same. The electric motor includes a stator including a stator core and a stator coil wound around the stator core, a rotor disposed to be rotatable with respect to the stator, and a cooling unit configured to allow a cooling fluid to flow therein and disposed to be in contact with the stator to cool the stator, wherein an outer surface of the stator core includes grooves in which the cooling unit is inserted. Cooling performance can be enhanced by shortening a heat transmission path, and the cooling unit can be easily fabricated and coupled.

主权项

1. An electric motor comprising:
a stator including a stator core and a stator coil wound around the stator core; a rotor disposed to be rotatable with respect to the stator; a frame accommodating the stator and the rotor therein; and a cooling unit to allow a cooling fluid to flow therein and disposed to be in contact with the stator to cool the stator, wherein the frame comprises a cylindrical unit having a cylindrical shape with both sides thereof opened, and covers provided at both end portions of the cylindrical unit, wherein an outer surface of the stator core includes grooves in which the cooling unit is inserted, wherein the frame comprises a plurality of support portions for supporting the stator such that the stator is curbed in an axial direction, wherein the cooling unit comprises linear section portions disposed in an axial direction on the stator core and curved section portions connecting the linear section portions, and wherein each of the plurality of support portions is protruded from an inner surface of each of the covers and is disposed between the curved section portions such that an end portion of each of the plurality of support portions comes in contact with one of both end portions of the stator core.