Synchronous permanent magnet motor

The utility model discloses a synchronous permanent magnet motor, which comprises a shell, a stator and a rotor, the stator is arranged in a cavity on the inner side of the shell, the rotor is arranged in a cavity on the inner side of the stator, magnetic steel grooves are annularly arranged on the outer side of the rotor at intervals, magnetic steel is arranged in the magnetic steel grooves, and the number of the magnetic steel grooves is equal to the number of poles of the motor. Compared with the prior art, the permanent magnet synchronous motor has the advantages that on the basis of an original asynchronous motor, the rotor is provided with the magnetic steel grooves with the number corresponding to the number of poles of the motor, and the magnetic steel is added into the magnetic steel grooves, so that the original asynchronous motor is changed into the permanent magnet synchronous motor, and the purpose of saving energy of the motor is achieved; the modified synchronous permanent magnet motor effectiv