The rotor in the servo motor is a permanent magnet, and the U/V/W three-phase current controlled by the actuator forms an electromagnetic field. The rotor rotates in this magnetic field. The motor has its own encoder to feed back to the driver, and the driver compares the feedback value with the target value. , adjust the rotation angle of the rotor. The accuracy of the encoder directly affects the accuracy of the servo motor.

Today, Xiaobian, an Anhui Cameron servo motor manufacturer, is here to talk to you about the basic knowledge of AC servo motors, hoping to help you!

The structure of the AC servo motor can be divided into two parts: the stator part and the rotor part. The structure of the stator in the device is basically the same as that of the rotor transformer stator, and two-phase windings with a space forming an electrical angle of 90 degrees are arranged inside the stator iron. AC servo motor is a two-phase AC motor, one is the excitation coil and the other is the control coil. When an AC servo motor is used, a constant excitation voltage Uf is applied to both ends of the excitation winding, and a control voltage Uk is applied to both ends of the control coil. After adding voltage to the stator winding, the servo motor will turn quickly. The current flowing into the excitation winding and the control coil forms a rotating magnetic field inside the motor. The rotating magnetic field determines the direction of the motor. When the voltage applied to any coil is reversed, the direction of the magnetic field of the motor will change, and the direction of the motor will also change. . In order to form a circular magnetic field inside the motor, it is required that the excitation voltage Uf and the control voltage UK should have a phase difference of 90 degrees. The commonly used method is:

1. A 90-degree phase shift is composed of the phase and line voltage of the three-phase power supply.

2. Use any line voltage of the three-phase power supply.

3. Phase shift network.

4. Capacitors connected in series on the excitation phase.