Permanent magnet DC brushless motor for driving air compressor

A permanent magnet DC brushless motor for driving an air compressor comprises three modules, namely, an electric part, a changeover part and a driving control part, wherein, a changeover housing of the changeover part is connected and fixed with both an inner side end cover and a front end housing of the electric part through connecting screws, so as to fixedly connect the changeover part and the electric part, the changeover housing of the changeover part is connected with a driving PCB (printed circuit board) of the driving control part through screws, so as to integrally connect the driving control part and the changeover part, a circular rear end cover of the driving control part is sleeved with a circular radiator through rear end cover set screws, VMOS (Vertical Metal Oxide Semiconductor) tubes welded on the driving PCB are connected with both arc-shaped radiating fins and the radiator through screws, and the driving PCB and the radiator are integrally connected. In the utility model, the electric part, the changeover part and the driving control part are connected tightly to form a three-section integrated structure which has the electric, driving and control and radiating functions, and the permanent magnet DC brushless motor is widely suitable for driving various undersized air compressors.