Motor rotor and permanent magnet synchronous motor

The invention relates to the field of motors, in particular to a motor rotor and a permanent magnet synchronous motor. The motor rotor comprises a rotor iron core, the rotor iron core is provided with a plurality of magnetic poles, each magnetic pole is provided with a first magnetic steel groove unit and a magnetic pole center line d axis corresponding to the first magnetic steel groove unit, the first magnetic steel groove unit is filled with first permanent magnets, and the first permanent magnets form a first magnetic linkage; on the cross section perpendicular to the center line of the rotor core, the first flux linkage is provided with a concave side and a convex side opposite to the concave side in the d-axis direction corresponding to the first flux linkage. The concave side of the first flux linkage is close to the center of the rotor core; the magnetic flux is improved, the motor efficiency is improved, the harmonic wave of the motor is reduced, and the motor operation noise is reduced. 本发明涉及电机领域，具体