The application provides a
permanent magnet motor rotor ventilation structure and a motor, and belongs to the technical field of motors. The
permanent magnet motor rotor ventilation structure comprises a rotor support and permanent magnets arranged on the outer circumference of the rotor support. The application further comprises a
fan blade. The
fan blade is fixedly installed on the outer side wall of the rotor support in the axial direction and close to one side of the permanent magnets. The
permanent magnet motor rotor ventilation structure provided by the application is installed on the outer side wall of the rotor support in the axial direction. Therefore, the
fan blade rotates synchronously with the rotor support, thereby forming a cooling air flow at the rotor support. The existing
air cooling method of the permanent
magnet motor is to directly wrap the fan on the support shaft. Therefore, when the permanent
magnet motor is assembled, the rotor support and the fan need to be sequentially installed on the support shaft in order, which leads to inconvenient disassembly and
assembly. The fan blade of the application can be pre-installed on the rotor support. Then, during the
assembly process, the fan blade and the rotor support can be directly installed on the support shaft as a whole, thereby improving the
assembly efficiency and simplifying the structure.