The power generation process of permanent magnet synchronous motor:

In permanent magnet synchronous motor, the formation of rotor magnetic field is divided into two steps: first, the stator rotating magnetic field first induces current in the rotor winding; The second step is to induce the current then generate the rotor magnetic field. Under the action of Lenz's law, the rotor follows the stator's rotating magnetic field, but it can never catch up, so it is called an asynchronous motor. If the current in the rotor winding is induced by the stator rotating magnetic field, but is generated by itself, then the rotor magnetic field has nothing to do with the stator rotating magnetic field, the direction of its magnetic pole is fixed, then according to the principle of same-sex repulsion opposite-attraction, the stator rotating magnetic field will pull the rotor rotation, the rotor magnetic field the rotor the stator rotating magnetic field "synchronous" rotation. This is how a synchronous motor works.