What is an AC Servo Motor?
I believe everyone knows that the AC servo motor is mainly composed of a stator and a rotor. When there is no control voltage, there is only a pulsating 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. When the load is constant, the speed of the motor changes with the magnitude of the control voltage. When the phase of the control voltage is opposite, the servo motor will be reversed. Therefore, it is very important to do a good job in control during the use of AC servo motors. So what are the three control methods of AC servo motor?
Three control methods of AC servo motor:
1. Amplitude and phase control mode
Both the amplitude and phase are controlled, and the speed of the servo motor is controlled by changing the amplitude of the control voltage and the phase difference between the control voltage and the excitation voltage. That is, the magnitude and phase of the control voltage UC are changed at the same time.
2. Phase control method
During phase control, both the control voltage and the excitation voltage are rated voltages, and the control of the AC servo motor is realized by changing the phase difference between the control voltage and the excitation voltage. That is, keep the amplitude of the control voltage UC unchanged, and only change its phase.
3. Amplitude control metho
The phase difference between the control voltage and the excitation voltage is maintained at 90 degrees, and only the amplitude of the control voltage is changed. That is, keep the phase angle of the control voltage UC unchanged, and only change its amplitude.
The control methods of these three servo motors are three control methods with different functions. In the actual use process, we need to choose the appropriate control method according to the actual working requirements of the AC servo motor. The content introduced above is the three control methods of AC servo motor.
Post time: Jul-07-2023
