AC servo motor why drive?
In addition, the servo controller does not have the ability of logic control, if need servo motor first slow turn, then turn fast, then to stop somewhere and then reverse, and so on, these signals are more responsible for the upper controller of the servo controller, such as PLC, such as motion controller.
Servo motor control is more complex, you need to change the frequency, voltage, current, in order to achieve the motor speed, torque, position of the overall control, servo drive is dry. The servo motor is only responsible for how much frequency and voltage you give me, so I'll do the right thing. Changes in frequency, voltage, direction, etc., are handled by the servo controller.
Ordinary AC motor speed is 1400 rpm, why is 1400, because the average power is 220V, 50Hz, which is 50 times per second transformation phase, and the motor is usually 4, which is two times the phase transformation of a turn, coupled with the general AC motor is not synchronous, asynchronous communication the motor, so a little slower than the theoretical speed of 50/2*60=1500, so it is usually about 1400. Thus, the speed of the motor can be changed by changing the frequency of the power supply. A controller corresponding to an ordinary motor is called a frequency converter.
