Ningbo North Lun Qiaoda electromechanical maintenance of industrial products is a professional converter, voltage regulators, DC drives, industrial power supply, etc., also known as the implementation of a motor servo motor, automatic control system, used for the implementation of components of the received electrical signal into the motor shaft angular displacement or angular velocity output. DC and AC servo motor into two categories, its main feature is that no rotation phenomenon when the signal voltage is zero, the speed increases torque and uniform decline. Servo motor can control the speed, location accuracy is very accurate. Often used in some of CNC equipment above. Servo drive works: 1. Servo drive to the motor pulse width modulating signal, i.e. the PWM signal, the pulse width by adjusting the drive to control the motor speed and torque, is stopped when the duty ratio is 0, run at full speed is 100 (just an example, not necessarily so), so the drive is controlled by servo motor frequency independently of the internal drive. 2. When using the analog control, but also by the pulse width modulating signal to control the motor, but the way you control the host computer has changed, by the hair into a pulse control to +/- 10V analog control, but only PC control drive mode has changed, the drive motor is still pulse width modulating the control signal unchanged. 3. There are a variety of servo motors, such as AC permanent magnet synchronous motors, such as DC brush motors, such as brushless DC motors, torque motors or anything, can be collectively referred to as the servo motor.