PERMANENT MAGNET SYNCHRONOUS MOTOR

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Disclosed is a permanent magnet synchronous motor, comprising a stator (1) and a rotor (2). A plurality of wire slots (3) are circumferentially distributed on the stator, a plurality of sets of magnet slots (5) arc circumferentially distributed in the rotor. The wire slots (3) arc provided therein with coils (4), and the sets of magnet slots (5) are provided therein with permanent magnets (7). Formulae 3PW/ L C S = K and 0.15 ‰¤ K ‰¤ 0.85 are satisfied, wherein, P is the number of pole-pairs of the permanent magnet (7) in the rotor (2); W is the spacing between two adjacent sets of magnet slots (5); L C is the tooth width of the stator (1), and S is the number of the wire slots (3) on the stator (1). The permanent magnet synchronous motor can reduce dependence on rare earth and improve the output torque of the permanent magnet synchronous motor.