If the parameter selection of the AC servo motor is similar to the general single-phase asynchronous motor, once the motor rotates, even if the control is equal to zero, the motor continues to rotate and the motor loses control. This phenomenon is called "rotation".
How to overcome the "rotation" phenomenon of AC servo motor? Synthetic torque characteristics of forward and reverse rotating magnetic fields: 1. When single-phase excitation, when the control voltage applied to the control winding in the motor operating range 0 is reversed (keep the excitation voltage unchanged),Servo Motor the rotation direction of the rotating magnetic field occurs Changes to reverse the rotor of the motor. When the magnitude of the control voltage applied to the control winding changes, the ellipticity of the rotating magnetic field it generates is different, and the resulting electromagnetic torque is also different, thereby changing the speed of the motor.
When the excitation voltage is constant,Servo Motor the characteristic curve shifts downward as the control voltage decreases. When the same load torque acts, the speed of the AC servo motor decreases evenly as the control voltage decreases.