Built-in permanent magnet synchronous motor

The utility model discloses a built-in permanent-magnet synchronous motor, which relates to the technical field of motors and comprises a stator, a rotor and a transmission shaft, the rotor is arranged on the inner side of the stator, the transmission shaft is inserted into the inner wall of the rotor, a plurality of mounting mechanisms are arranged on the outer side of the stator, and each mounting mechanism comprises a U-shaped plate. The U-shaped plate is arranged on the outer side wall of the stator in a clamped mode, a series connection rod is inserted into the two side walls of the U-shaped plate jointly in a sliding mode, all the series connection rods are inserted into the side wall of the stator in a sliding mode, and locking nuts are connected to the two ends of the rod wall of each series connection rod in a threaded mode. According to the utility model, after the stator is installed, a certain gap can be conveniently kept between the stator and the motor, heat dissipation is facilitated, the worki