Mitsubishi AC Servo Motor HA80NC-S

The structure of the stator of the AC servo motor is basically similar to that of the capacitor split-phase single-phase asynchronous motor. The stator is equipped with two windings with a mutual difference of 90 degrees. One is the excitation winding Rf, which is always connected to the AC voltage Uf; the other is the control winding L, which is connected to the control signal voltage Uc. So the AC servo motor is also called two servo motors.

When the AC servo motor has no control voltage, there is only an active magnetic field generated by the excitation winding in the stator, and the rotor is stationary; when there is a control voltage, a rotating magnetic field is generated in the stator, and the rotor rotates in the direction of the rotating magnetic field. Under normal circumstances, the speed of the motor changes with the magnitude of the control voltage, and when the phase of the control voltage is opposite, the servo motor will reverse.

Although the working principle of the AC servo motor is similar to that of the split-phase single-phase asynchronous motor, the rotor resistance of the former is much larger than that of the latter. Therefore, compared with the single-machine asynchronous motor, the servo motor has a large starting torque, a wide operating range, There are three notable features of no rotation phenomenon.