The permanent magnet synchronous motor provides excitation with permanent magnet, which makes the motor structure simple, reduces the processing assembly costs, eliminates the collector ring brush which are prone to problems, improves the reliability of the motor operation. because there is no excitation current no excitation loss, the efficiency power density of the motor are improved. 

Permanent magnet synchronous motor is composed of stator, rotor end cover. The stator is basically the same as the ordinary induction motor, adopts the laminated structure to reduce the iron consumption of the motor during operation. The rotor can be made of solid laminated. The armature winding can adopt the centralized integral winding, but also the distributed short distance winding the unconventional winding.

Permanent magnet synchronous motor is mainly composed of stator, rotor end cover other components, the stator is made of laminated laminated to reduce the iron consumption generated during the operation of the motor, which is equipped with three-phase AC winding, called armature. The rotor can be made of solid form, it can be made of laminated press, which is equipped with permanent magnet material. According to the different positions of the permanent magnet material on the motor rotor, the permanent magnet synchronous motor can be divided into two structural forms: prominent type built-in type. The corresponding schematic diagram is given in the right figure. The magnetic circuit structure of the protruding rotor is simple the manufacturing cost is low, but the asynchronous starting cannot be realized because the starting winding cannot be installed on its surface