Rotor improvement structure of permanent magnet synchronous motor with wide speed regulation

The utility model discloses a rotor improvement structure of a permanent magnet synchronous motor with wide speed regulation. The rotor improvement structure comprises a rotor iron core, wherein the rotor iron core is formed by laminating silicon steel sheets and is fixed by rivets; the axial line of the rotor iron core is provided with an assembling hole connected with the rotor through a shaft; the rotor iron core is provided with multiple through holes which are parallel with the axial line of the rotor iron core; and a magnetic steel body is arranged inside each through hole. By optimizing the structure of the motor rotor and the magnetic path structure, the rotor improvement structure of the permanent magnet synchronous motor with the wide speed regulation, disclosed by the utility model, has the advantages of reducing intensity of an air-gap magnetic field, weakening magnetic resistance of the permanent magnet, and finally realizing the purposes of improving the highest rotating speed of the motor and i