AC servo motor needs a driver to run

Release time：

2022-05-18 00:00

Everyone knows that the AC servo motor needs a driver to run. The speed of an ordinary AC motor is generally about 1400 rpm. Why is it 1400? Because the general power supply is 220V, 50Hz, that is, the phase changes 50 times per second, and usually the motor is 4 poles, that is, change the phase twice and make a circle, plus the ordinary AC motor is not synchronous, it is an AC asynchronous motor, so it is a little slower than the theoretical speed of 50/2*60=1500, so it is usually about 1400 rpm. It can be seen that the speed of the motor can be changed by changing the power supply frequency. Such a controller corresponding to an ordinary motor is called a frequency converter.

The control of the servo motor is more complicated, and the frequency, voltage, and current need to be changed to achieve full control of the motor's speed, torque, and position. The servo drive is for this purpose. The AC servo motor needs a driver to run, and the servo driver is only responsible for giving frequency and voltage, and the motor makes corresponding instructions. Changes in frequency, voltage, and direction are all changed by the servo controller.

The AC servo motor needs a driver to run. In addition, the servo controller does not have the ability of logic control. If the servo motor needs to turn slowly, then turn fast, stop at a certain place, and then reverse, etc., these signals are controlled by the servo. The upper controller of the controller is responsible for, such as PLC, such as motion controller.