PERMANENT MAGNET SYNCHRONOUS MOTOR

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Disclosed is a permanent magnet synchronous motor comprising a stator (1) and a rotor (2)，wherein the stator (1) is provided thereon with a plurality of wire slots (3) in a circumferential direction, the rotor (2) is provided therein with a plurality of sets of magnet slots (5) in a circumferential direction, with the wire slots (3) being provided therein with coils (4) and the sets of magnet slots (5) being provided therein with permanent magnets (7); the number of poles of the permanent magnets (7) on the rotor (2) is P, the spacing between two adjacent sets of magnet slots (5) is W, the tooth width of the stator (1) is Lc, and the number of the wire slots (3) on the stator (1) is S, wherein 3PW/LcS=K, and 0.15≤K≤0.85. The permanent magnet synchronous motor can reduce dependence on rare earth and improve the output torque of the permanent magnet synchronous motor.