PERMANENT MAGNET FIXING STRUCTURE

A permanent magnet fixing structure. A permanent magnet is mounted at an inner surface or an outer surface of a rotor core by two adjacent magnetic isolating pressing bars, the magnetic isolating pressing bars and the permanent magnet having a clearance fit. The magnetic isolating pressing bars comprise a fixed section fitted in the rotor iron core and a pressing section that presses against the permanent magnet tightly. The fixed section is inserted into an interior of the rotor core, and the two are fixed by a securing member disposed at a top end of the fixed section after assembly. A cross section of the pressing section has a swallowtail shape. A side surface of the permanent magnet abutting the pressing section has a shape matching that of the pressing section. The pressing section in the structure ensures that the permanent magnet does not fall off the inner surface or the outer surface of the rotor core. In addition, the securing member fixes the fixed section to the rotor core. In this way, the perma