Centrifugal fan

The invention provides a centrifugal fan which comprises a fan shell, an impeller and an electric drive assembly, an air cavity is formed in the fan shell, and an air inlet is formed in the outer wall of the fan shell; the impeller is rotationally arranged in the air cavity corresponding to the air inlet; the electric drive assembly comprises an axial magnetic flux motor, a bearing transmission part and a cooling fan capable of working independently, the axial magnetic flux motor is connected with the impeller through the bearing transmission part, and the cooling fan is arranged on the side, opposite to the bearing transmission part, of the axial magnetic flux motor. The axial magnetic flux motor is adopted as a main power source, and the cooling fan capable of independently working is arranged at the tail end of the axial magnetic flux motor, so that the technical problems of large equipment size, heavy weight and high energy consumption caused by the fact that a centrifugal fan is driven by a three-phase a