What are the AC motors?
1, AC synchronous motor
That is, the rotor is made of permanent magnet material, so after the rotation, as the rotating magnetic field of the stator of the motor changes, the rotor also changes the speed of the response frequency, and the rotor speed = stator speed, so it is called "synchronous".
2, AC asynchronous motor
The rotor consists of an induction coil and material. After the rotation, the stator generates a rotating magnetic field, the magnetic field cuts the induction coil of the rotor, the rotor coil generates an induced current, and the rotor generates an induced magnetic field, and the induced magnetic field follows the change of the rotating magnetic field of the stator, but the magnetic field change of the rotor is always smaller than the change of the stator, once equal to The magnetic field of the rotor is cut by the magnetic field without change, and there is no induced current in the rotor coil. The rotor magnetic field disappears, and the rotor stalls again and the stator generates a speed difference and regains the induced current. So a key parameter in AC asynchronous motors is that the slip ratio is the ratio of the rotor to stator speed difference.
3. Corresponding AC synchronous and asynchronous motor inverters have corresponding synchronous inverters and asynchronous inverters. Servo motors also have AC synchronous servo and AC asynchronous servo. Of course, AC asynchronous inverter is common in the inverter, and servo synchronous synchronous servo is common.
