Motor

The embodiment of the invention provides a motor. The motor comprises a motor base, a first end cover, a second end cover, a stator assembly and a rotor assembly. The first end cover is arranged at one end of the base and is connected with the base; the second end cover is arranged at the other end of the base and is connected with the base; the stator assembly is arranged in the base and is connected with the base; the rotor assembly is provided with a first cooling channel extending in the axial direction, and the rotor assembly is arranged in the machine base and rotationally connected with the first end cover and the second end cover. The rotor assembly, the motor base and the first end cover define a first containing cavity, the rotor assembly, the motor base and the second end cover define a second containing cavity, and the first cooling channel communicates with the first containing cavity and the second containing cavity to form an internal cooling channel. According to the motor provided by the embo